Open Access

Ethnobotanical survey of medicinal dietary plants used by the Naxi People in Lijiang Area, Northwest Yunnan, China

  • Lingling Zhang1, 2,
  • Yu Zhang1,
  • Shengji Pei1,
  • Yanfei Geng1, 3,
  • Chen Wang1 and
  • Wang Yuhua1Email author
Journal of Ethnobiology and Ethnomedicine201511:40

https://doi.org/10.1186/s13002-015-0030-6

Received: 16 May 2014

Accepted: 6 May 2015

Published: 12 May 2015

Abstract

Background

Food and herbal medicinal therapy is an important aspect of Chinese traditional culture and traditional Chinese medicine. The Naxi are indigenous residents of the Ancient Tea Horse Road, and the medicine of the Naxi integrates traditional Chinese, Tibetan, and Shamanic medicinal systems, however, little is known about the medicinal dietary plants used by the Naxi people, or their ethnobotanical knowledge. This is the first study to document the plant species used as medicinal dietary plants by the Naxi of the Lijiang area.

Methods

Ethnobotancial surveys were conducted with 89 informants (35 key informants) from 2012 to 2013. Three different Naxi villages were selected as the study sites. Literature research, participatory investigation, key informant interviews, and group discussions were conducted to document medicinal dietary plants and the parts used, habitat, preparation methods, and function of these plants. The fidelity level (FL) was used to determine the acceptance of these medicinal dietary plants. Voucher specimens were collected for taxonomic identification.

Results

Surveys at the study sites found that 41 ethnotaxa corresponded to 55 botanical taxa (species, varieties, or subspecies) belonging to 24 families and 41 genera. Overall, 60 % of documented plants belonged to seven botanical families. The most common families were Compositae (16.4 %) and Rosaceae (10.9 %). Roots (34.1 %) were the most common part used. Wild-gathered (68.3 %), semi-domesticated (17.1 %), and cultivated (14.6 %) were the most common habitats of medicinal dietary plants. Stewing plants with meat was the most common preparation and consumption method. The plants were used to treat 21 major health conditions; alleviating fatigue (42.8 %) was the most common. The maximum FL of 100 was found for 68.3 % of the medicinal dietary plants

Conclusions

The medicinal dietary plants used by the Naxi people are diverse and are used to treat a wide spectrum of body disorders. Further studies focusing on safety, detoxification, and nutritional value of the plants should be conducted to allow them to be used to improve health and prevent diseases in modern society.

Keywords

Medicinal dietary plant Traditional Chinese medicine Ethnobotany Naxi Lijiang

Background

There is much overlap between medicine and food [15], and dietary products can simultaneously be a food and a medicine [24, 611]. In fact, many plants in local food cultures are inseparable from traditional therapeutic systems [8, 1215]. China has a long cultural history of homologous medicine and food, and the thought of “food as medicine” has existed in China since ancient times [16, 17]. Therefore, food therapy is an important characteristic of Chinese culture and traditional Chinese medicine (TCM). The concept of food therapy was proposed 2000–3000 years ago in the Inner Canon of Huangdi [18]. In the Tang Dynasty, food was used to treat diseases and the famous medical expert Sun Simiao proposed that “the healer must know the causes of the disease and the disorder of the body, then first treat with food, if it does not work, then medicine could be adopted” [19]. Food therapy as a part of TCM is based on the Chinese philosophy of Yin -Yang and the Five Elements (metal, wood, water, fire and earth) [20]. Food therapy uses holistic principles as its base, and highly emphasizes harmony within the universe [20, 21], while preventing disease by enhancing the condition of the body.

A medicinal diet includes using medicines in the diet or functional foods used as medicines, based on the current health-status of an individual, as well as the overall epidemiological situation of a population [19, 21]. Because the population is aging and the number of people who are sub-healthy and living with chronic diseases is increasing, the Chinese medicinal diet has received considerable attention. In the United States, Europe, and Australia, the “non-nutritive” health roles of diet are receiving increasing attention within the areas of functional foods, nutraceuticals, and phytonutrients [15, 2226]. Since 1985, more than ten food therapy books per year have been published in China [27]. However, study of the medicinal diets used by indigenous communities in China has been mostly neglected.

TCM has spread to Lijiang and was adopted by the Naxi people [28]. The population of the Naxi people in China is about 324,679 and mainly they inhabits the Yulong Naxi nationality Autonomous County in the Lijiang area [29]. The Naxi are a Burmo-Naxi-Lolo sociolinguistic sub-group of the Tibeto-Burman group within the Sino-Tibetan family [30]. The Naxi population was formed during the southward migration of the ancient Qiang people during the Qin Dynasty (221–206 BC), who had originally inhabited the Hehuang area of Northwest China [30]. The Naxi are indigenous residents of the Ancient Tea Horse Road, a trade link documented since the Tang dynasty (618–907 CE) which lasted until the 1960s, and stretched across Yunnan, Sichuan and Tibetan provinces [31]. The road promoted exchanges in culture, religion and ethnic migration, resembling the Silk Road [32]. Given this history, the medicine of the Naxi integrates traditional Chinese, Tibetan, and Shamanic medicinal systems [28]. Prior research indicates that the Naxi culture promotes diet therapy, and documentation of many of their traditional medicines and diet remedies exists through the world’s only remaining pictographic writing system [33]. Despite the renewed interest in medicinal diets by scientists, consumers, and industry, not much is known about the medicinal dietary plants used by the Naxi, or their associated ethnobotanical knowledge. This is the first study to focus on the medicinal dietary plants of the Naxi People and their associated knowledge. The plant materials, parts used, habitats, and medicinal dietary uses are recorded and the fidelity of the medicinal dietary plants is assessed.

Methods

Study site

The study was conducted in the Yulong Naxi Nationality Autonomous County in Lijiang Area in Northwest Yunnan Province, China. Northwest Yunnan is located in the Three Parallel Rivers region, and Lijiang is listed as a World Natural and Cultural Heritage Site by UNESCO. The region’s exceptional altitudinal range, topography, and climatic variability have fostered centers of plant species endemism [3436]. Northwest Yunnan harbors over 3500 endemic plant species, many of which are used by local communities including the Naxi [34, 35, 37]. Three typical Naxi villages (Wenhai, Ludian, and Shihong) were selected as study sites. These villages represent particular landforms in the Northwest Yunnan plateau, and have different positions in the Naxi culture (Fig. 1).
Fig. 1

Location map of study sites

Wenhai village is a typical wet plateau basin located directly on the western foot of the first peak of the Yulong Snow Mountain. The location is 26°59′16.37″E, 100°10′6.23″N and the altitude is between 3109 and 3380 m. Weihai village is an ancient village on the Ancient Tea Horse Road leading to Tibet [32]. Ludian village is a typical dry plateau basin located at the center of the Northwest Yunnan plateau. The location is 103°19'12"E, 27°7′48″N and the altitude is between 2400 and 2800 m. Ludian village is the last stop of the “Soul Sending Way”, which is the transfer road of the Naxi [30]. Shihong village is a typical mountain village located on the southwestern most peak, “Ninety-nine Longtan”, of the Laojun Mountain. The location is 26°41′24″E, 99°53′49″N, and the altitude is between 3500 and 3600 m. The village was the first settlement in the surrounding area [38], and both the traditional culture and natural environment are well preserved.

Data collection

The data were collected from 2012 to 2013, and at least one half of one month of the fieldwork was conducted in each season every year. The methods we adopted included literature research, participatory investigation, key informant interviews, and group discussions [39]. Eighty-nine informants (49 men and 40 women) were interviewed. Informant ages ranged from 19 to 85 years old, and those aged above 60 were key informants. The interviews were carried out in standard Mandarin Chinese given that most of the population is bilingual and has attended a Chinese language school. We recorded the local Chinese language names as well as local Naxi names.

Our study began with a literature search, which not only helped identify proper study sites, but also helped us understand flora of Northwest Yunnan and collect the ethnobotanical data of the Naxi. The first step of the fieldwork was participatory investigation, and the main task was to search for medicinal dietary plants with the key informants to perform a quick inventory, collect voucher specimens, record habitats, and take photos. The preparation and consumption procedures were witnessed and recorded in the homes of the villagers. After that, key informant interviews were performed. The plant specimens collected in the participatory investigation were used for reference during the key informant interviews. In the key informant interviews, detailed information about each plant, such as the local Chinese and Naxi names, habitat, edible parts, preparation, consumption, and medicinal dietary function, were documented. During group discussions, the information garnered in the first two stages was discussed by a group of informants to ensure accuracy.

Fidelity level

Fidelity level (FL) was used to assess the acceptance of each medicinal dietary plant at the ethnotaxic level. The formula used was FL = Np/N × 100 [4042], where Np is the number of informants stating the use of the plant as a medicinal dietary plant and N is the total number of informants citing the plant as edible or for medicinal use. As medicinal dietary plants are edible plants can be used as medicine (for example Allium tuberosum, a common vegetable, can be used to calm nerves) or medicinal plants can be consumed with food (for example Aconitum stapfianum is consumed by stewing with meat in winter for its anti-rheumatic benefits), we define N as the total number of informants citing the plant for edible or medicinal use. The values of FL range from 0 to 100, and increasing values of FL for a plant indicate its greater acceptance as a medicinal dietary plant.

This study was carried out following the code of ethics of the American Anthropological Association [43, 44] and the International Society of Ethnobiology Code of Ethics [40, 45]. Prior oral informed consent was acquired. Specimen identification was completed with the help of the experts at the Kunming Institute of Botany, and these specimens will be stored in the Herbarium of the Kunming Institute of Botany at the Chinese Academy of Sciences after our further study.

Results

Ethnobotanical surveys at the study sites found that 41 ethnotaxa of medicinal dietary plants correspond to 55 botanical taxa (species, varieties, or subspecies) belonging to 24 families and 41 genera. At the family level, we found that 60 % of documented plants belonged to seven botanical families, and the most represented families were Asteraceae (16.4 %), Rosaceae (10.9 %), Dioscoreaceae (7.4 %), Cruciferae (7.4 %), and Liliaceae (7.4 %) (Fig. 2). These families were similar to other edible plants recorded in the same site, of which Rosaceae (19.8 % species) and Liliaceae (10.3 % species) were the most common. However, the similarity with the medicinal plants of the Naxi is apparently larger, of which Asteraceae (13.1 %) and Labiatae (5.8 %) were the most common family [33]. At the species level, those medicinal dietary plants accounted for 39 % of the total number of edible plant species (146) recorded at the study sites. However, these plants had less overlap with recorded Naxi medicine plants [30]. This indicates that the selection of medicinal dietary plants overlaps with the edible and medicinal plants in the area. However, previous studies may have treated some plants as edible or medicinal only, and the medicinal dietary functions were ignored. Table 1 lists the ethnobotanical information for each plant, including the scientific name, local name, family name, habitat, usage, preparation, and plant part used.
Fig. 2

Most quoted plant families by number of species included

Table 1

Inventory of medicinal dietary plants used by the Naxi in Lijiang area, Northwest Yunnan, China (Ranked alphabetically, Ethnotaxically organized)

Local name

Family

Scientific name of original plant

Medicinal dietary function

Diet type

Preparation

Part used

Habitat

Voucher specimen code

Zhuzishen

Campanulaceae

Codonopsis convolvulacea subsp. forrestii (Diels) D. Y. Hong ex L. M. Ma

Treat eye disease

Medicinal diet

Stewed with meat; steamed with egg

Root

Wild-gathered

ZLL-0005

Shanyao

Dioscoreaceae

Dioscorea deltoidea Wall. ex Griseb.; Dioscorea delavayi Franch.; Dioscorea hemsleyi Prain ex Burkill; Dioscorea sp.

Alleviate fatigue, Tonifying

Vegetable, Medicinal diet

Stewed with meat

Root

Semi-domesticated

ZY-0021, ZY-0022, ZY-0023, ZY-0024

Yekuai

Malvaceae

Malva verticillata L.

Postpartum blood stasis

Medicinal diet

Soup made with egg

Root

Wild-gathered

ZLL-0001

Xuelianhua

Compositae

Saussurea leucoma Diels

Alleviate fatigue, Tonifying

Medicinal diet

Soaked in boiling water

Whole plant

Wild-gathered

ZLL-0010

Xuecha

Icmadophilaceae

Thamnolia vermicularis (Sw.) Ach.ex Schae; Thamnolia subuliformis (Ehrh.) W. L. Culb

Treat cold, Clean away heat, detoxification

Generation tea

Soaked in boiling water

Whole plant

Wild-gathered

ZLL-0079, ZLL-0080

Xiaohongshen

Rubiaceae

Galium elegans Wall. ex Roxb.

Alleviate backache,bruises

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZY-0035

Xiangyashen

Zingiberaceae

Roscoea tibetica Batalin; Roscoea yunnanensis Loes.; Roscoea cautleoides Gagnep.

Kidney deficiency

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZY-0121, ZY-0122, ZY-0123

Xiangru

Labiatae

Origanum vulgare L.

Treat cold

Spices

Boil water

Aerial part

Wild-gathered

GYF-0061

Wuweizi

Magnoliaceae

Schisandra chinensis (Turcz.) Baill.

Alleviate fatigue,treat insomnia

Fruit, medicinal diet

Infused with alcohol

Fruit

Wild-gathered

ZLL-0027

Tiaoshen

Compositae

Stebbinsia umbrella (Franch.) Lipsch.

Alleviate fatigue, Tonifying

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZLL-0107

Songhuafen

Pinaceae

Pinus armandii Franch.

Moistening lung, Anti-tussive

Medicinal diet

Mixed with honey or brown sugar

Pollen

Wild-gathered

ZLL-0060

Songzi

Pinaceae

Pinus yunnanensis Franch.

Moistening lung, Anti-tussive

Nut

Dried

Kernel

Wild-gathered

ZY-0074

Songluo

Parmeliaceae

Usnea longissina Ach.

Moistening lung, Anti-tussive

Generation tea

Soaked in boiling water

Whole plant

Wild-gathered

GYF-0082

Songjisheng

Loranthaceae

Arceuthobium pini Hawksworth et Wiens

Treat insomnia

Generation tea

Soaked in boiling water

Leaf

Wild-gathered

ZLL-0105

Shanzha

Rosaceae

Crataegus scabrifolia (Franch.) Rehd.; Crataegus chungtienensis W. W. Smith

Appetizing,diuresis

Fruit, Candied fruit

Soaked in boiling water,mixed with honey

Fruit

Semi-domesticated

ZLL-0016, ZLL-0017

Shanjinzi

Rosaceae

Malus rockii Rehd.

Appetizing,diuresis

Fruit, Candied fruit

Soaked in boiling water,mixed with honey

Fruit

Semi-domesticated

ZLL-0132

Qinciguo

Rosaceae

Prinsepia utilis Royle

Postpartum weakness, Tonifying,

Oil

Extracted oil

Kernel

Semi-domesticated

ZLL-0075

Pugong Ying

Compositae

Taraxacum mongolicum Hand.-Mazz.

Clean away heat, detoxification

Vegetable

Made into soup

Aerial part

Wild-gathered

ZY-0002

Niubang

Compositae

Arctium lappa L.

Alleviate fatigue, Tonifying

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZY-0007

Mugua

Rosaceae

Chaenomeles speciosa (Sweet) Nakai

Anti–rheumatism

Fruit, seasoning

Stewed with fish

Fruit

Wild-gathered

ZLL-0013

Muer

Auriculariaceae

Auricularia auricula (L. ex Hook.) Underw

Gut purge

Vegetable

Cold dish

Whole plant

Wild-gathered

ZLL-0028

Mianshen

Labiatae

Eriophyton wallichii Benth.

Alleviate fatigue, Tonifying

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZLL-0065

Manjing

Cruciferae

Brassica rapa L.

Appetizing

Grain, vegetable

Raw, boiled

Root

Domesticated

ZLL-0045

Luobo

Cruciferae

Raphanus sativus L.

Appetizing

Vegetable

Raw, boiled

Root

Domesticated

ZLL-0069

Longdancao

Gentianaceae

Gentiana rigescens Franch. ex Hemsl.; Gentiana szechenyii Kanitz; Gentiana cephalantha Franch. ex Hemsl.

Kidney deficiency

Ferment

Boiled in water

Aerial part

Wild-gathered

ZY-0094, ZY-0095, ZY-0096

Juehuashen

Compositae

Hippolytia delavayi (Franch. ex W. W. Smith) Shih

Alleviate fatigue, Tonifying, moistening lung, Anti-tussive

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZY-0039

Jiucai

Liliaceae

Allium tuberosum Rottl. ex Spreng.

Calm nerves

Vegetable

Cooked with goat liver

Leaf

Domesticated

ZLL-0032

Jicai

Cruciferae

Capsella bursa-pastoris (Linn.) Medik.

Clean away heat, detoxification

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZY-0054

Daji

Compositae

Cirsium griseum Levl.; Cirsium lidjiangense Petr. ex Hand.-Mazz.; Cirsium chlorolepis Petr. ex Hand.-Mazz.; Cirsium eriophoroides (Hook.f.) Petrak

Tonifying

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZLL-0041, ZLL-0042, ZLL-0043, ZLL-0044

Huixiang

Umbelliferae

Foeniculum vulgare Mill.

Alleviate fatigue,alleviate backache

Vegetable, seasoning

Steamed with egg

Tender stem

Cultivated

GYF-0108

Huitiaocai

Chenopodiaceae

Chenopodium album L.

Treat constipation

Vegetable

Made into soup

Tender stem

Wild-gathered

ZLL-0128

Huangjing

Liliaceae

Polygonatum cirrhifolium (Wall.) Royle

Anti–rheumatism, promoting lactation,

Medicinal diet

Brewed

Root

Wild-gathered

ZLL-0078

Huajiao

Rutaceae

Zanthoxylum bungeanum Maxim.

Anti-rheumatism, treat belly ache

Seasoning

Soaked in boiling water

Fruit

Semi-domesticated

ZLL-0056

Heicaowu

Ranunculaceae

Aconitum stapfianum Hand.-Mazz.

Anti-rheumatism, treat stomachache, belly ache

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZLL-0067

Elancai

Cruciferae

Thlaspi arvense L.

Diuresis

Vegetable

Made into soup

Aerial part

Wild-gathered

ZLL-0029

Dujuanhua

Ericaceae

Rhododendron yunnanense Franch; Rhododendron hippophaeoides Balf. f. et W. W. Smith

Gut purge

Snacks, vegetable

Cold dish

Petal

Wild-gathered

ZY-0037, ZY-0038

Chuanxiong

Umbelliferae

Ligusticum chuanxiong Hort.

Alleviate backache

Vegetable

Steamed with egg

Tender stem

Cultivated

ZLL-0104

Chonglian

Rosaceae

Sanguisorba filiformis (Hook. f.) Hand.-Mazz.

Kidney deficiency

Medicinal diet

Stewed with meat

Root

Wild-gathered

ZLL-0097

Chongcao

Clavicipitaceae

Cordyceps sinensis (Berk.) Sacc.

Treat eye disease

Medicinal diet

Stewed with meat, steamed with egg,infused with alcohol

Whole plant

Wild-gathered

ZLL-0077

Cheqiancao

Plantaginaceae

Plantago depressa Willd.

Alleviate fatigue,diuresis

Vegetable

Stewed with meat

Root

Wild-gathered

ZLL-0116

Baihe

Liliaceae

Lilium lankongense Franch.; Lilium lancifolium Thunb.

Moistening lung, Anti-tussive

Vegetable

Stewed with meat

Bulb

Wild-gathered

GYF-0102, GYF-0103

Used parts

A wide range of plant parts including root, aerial plant, whole plant, fruit, tender stem, kernel, leaf, bulb, pollen, petal, and rhizome or flower from herbaceous (75.6 %) or woody plants (24.4 %) are used. The root was the most commonly used plant part (34.1 %); the most common seven plant parts are shown in Fig. 3. The remaining less commonly used parts were the bulb, pollen, petal, and rhizome. These results share little similarity to other edible plants, of which the fruit (44.8 %) and leaf (30.5 %) are the most commonly used parts. However, the used parts were similar to those on the Naxi medicinal plant list, with root as the most commonly used part (43.8 %) [33]. The informants stated that roots contain more substances for good health. Similar thinking is found in TCM, with the use of Panax ginseng as a prominent example.
Fig. 3

Plants parts used in the medicinal diet

Preparation

Mixing plants with other food items was the most common preparation and consumption method. The majority of inventoried medicinal dietary plants were stewed with meat (34.1 %), followed by use in soup, soaking in boiled water, and steaming with eggs. There were a few other preparations that involved infusion with alcohol, or mixing with honey or brown sugar. The Naxi believe that the meat of an animal has feelings, so it is better to enhance the blood and energy of the human body and prolong life. This concept is also recorded in the Southern Yunnan Materia Medica [46]. Nearly all remedies include only one medicinal dietary plant, and are easy to prepare.

Habitat

Wild-gathered (68.3 %), semi-domesticated (17.1 %), and cultivated (14.6 %) were the most common habitats of medicinal dietary plants (Fig. 4). The majority of the medicinal dietary plants of the Naxi were gathered from the wild. The Naxi prefer medicinal dietary plants that grow on high mountains, as they believe that these plants are more effective and impart longevity. The Naxi in Wenhai village liked to collect medicinal dietary plants from the Yulong Snow Mountain, and in Shihong village the Naxi collected plants from the Laojun Mountain. The most representative plants were Cordyceps sinensis and Saussurea leucoma. Semi-domesticated plants referred to those plants cultivated in home gardens. The Naxi prefer to grow medicinal plants which collected from the mountains in their home gardens [34], with a part for medicinal dietary use.
Fig. 4

The habitat of medicinal dietary plants

Medicinal dietary function

There are 21 major health conditions that can be treated by the collected medicinal dietary plants. The most common condition that can be treated is alleviating fatigue (42.8 %), followed by tonifying, moistening the lung, and as use as an antitussive (Fig. 5). In addition to the ten types of medical functions shown in Fig. 5, there were ten other functions including treating eye diseases, insomnia, cold, stomachache, abdominal pain, bruises, constipation, postpartum blood stasis, postpartum weakness, calming of the nerves, and promotion of lactation.
Fig. 5

Medicinal diet function category-number of plants used

Fidelity level

Sixty-eight percent of medicinal dietary plants used by the Naxi people had a maximum FL value of 100 and 83 % of the edible dietary plants had a FL value of over 50. This indicates the general acceptance of inventoried plants as medicinal dietary plants within the Naxi community. Special emphasis was given to some important plants that have maximum FL value. These plants included Polygonatum cirrhifolium, whose tuber is commonly used for promoting lactation, and is a widely used vegetable [47]. Others were Pinus armandii, Cirsium griseum, Cirsium lidjiangense, Cirsium chlorolepis, Cirsium eriophoroides, Ligusticum chuanxiong, Zanthoxylum bungeanum, and Aconitum stapfianum, which are wildly enjoyed by Naxi people for their good effect. Detailed use and the FL values of medicinal dietary plants are shown in Tables 1 and 2.
Table 2

Fidelity level of medicinal dietary plants of the Naxi

Local name

Medicinal dietary function

FL

Songhuafeng

Moistening the lung, Antitussive

100

Chuanxiong

Alleviates backache

100

Heicaowu

Anti-rheumatism, Treats stomachache, belly pain

100

Huajiao

Anti-rheumatism, Treats stomachache, belly pain

100

Huangjing

Anti-rheumatism, Promoting lactation

100

Chongcao

Treats eye disease

100

Ji

Tonifying

100

Songzi

Moistening the lung, Antitussive

100

Xuelianhua

Alleviates fatigue, Tonifying

100

Muer

Gut purge

100

Wuweizhi

Alleviates fatigue, Treats insomnia

100

Huixiang

Alleviates fatigue, Alleviates backache

100

Baihe

Moistening the lung, Antitussive

100

Shanjingzi

Appetizing, Diuresis

100

Shanzha

Appetizing, Diuresis

100

Manjing

Appetizing

100

Luobo

Appetizing

100

Xuecha

Treats colds, cleanup heat and detoxification

100

Mugua

Anti-rheumatism

100

Qingciguo

Treats postpartum weakness, Tonifying

100

Yeshanyao

Alleviates fatigue, Tonifying

100

Niubang

Alleviates fatigue, Tonifying

100

Xiaohongshen

Alleviates backache, Treat bruises

100

Xiangyashen

Tonifying kidney

100

zhuzishen

Treats eye disease

100

Tiaoshen

Treats insomnia

100

Jiuhuashen

Alleviates fatigue, Tonifying, Moistening the lung, Antitussive

100

Mianshen

Alleviates fatigue, Tonifying

100

Xiangru

Treats colds

80

Huitiaocai

Treats constipation

80

Cheqiancao

Alleviates fatigue, Diuresis

80

Jiucai

Calms nerves

60

Songjishen

Treats insomnia

60

Yekuai

Treats postpartum congestion

50

Pugongying

Cleanup heat and detoxification

40

Longdancao

Tonifying kidney

40

Jicai

Cleanup heat and detoxification

30

Chonglian

Tonifying kidney

30

Elancai

Diuresis

30

Songluo

Moistening the lung, Antitussive

30

Dujuanhua

Gut purge

20

Discussion

A large number of studies focusing on traditional medical diets have been conducted in China. Of these, two comparable ethnobotanical studies of medicinal dietary plants were conducted by Zhang [48] in Taibai Mountain, and by Gu [49] concerning Dai people in Xishuangbanna. Zhang’s study recorded the use of 183 species of medicinal dietary plants belonging to 61 families and 119 genera. The most represented families were Rosaceae, Liliaceae and Compositae, and the majority were in herb form (58.5 %). In Zhang's study the whole herb was used 36.6 % of the time, and the main preparation style was cold-dressed and eaten with noodles. The main medicinal functions were relieving fever and eliminating toxins. Gu documented 135 species of medicinal dietary plants, most of which were herbaceous plants, belonging to 49 families and 104 genera. Most plants were used to treat cold, indigestion, diarrhea and injuries. Gu conducted a biochemical investigation into two traditionally important medicinal dietary plants, Gmelina arborea and Strobilanthes cusia. The book Materia Medica of Yunnan records 73 prescription herbs and outlines the character of the Yunnan medicinal diet [46]. The results of our study share many common features with the plants used in Materia Medica of Yunnan, for example, nearly all prescribed medicinal diets include only one medicinal dietary plant, meat is used to enhance the beneficial effects of the plant, and liquor, honey and sugar are used to prepare the plant for consumption.

The richness of plant diversity in any area is evaluated not only by the number of species occurring there, but also by the intensity of associations and the dependence of the indigenous communities on those plants [15]. The medicinal dietary plants of the Naxi people are diverse. Villagers are knowledgeable about the use of various medicinal dietary plants to improve health, and to prevent and treat diseases. Roots are collected and used for the whole year, and green plant items are stored to prolong use through winter. The life of the Naxi people is closely related with medical dietary plants, and their medicinal diets are indispensable to the health of their communities. The changing relationship between humans and the environment has affected the medicinal diets and associated knowledge of the Naxi people. The selection of the medicinal diet overlaps with the edible and medicinal plants in the area. However, most studies have examined edible and medicinal plants separately, while the medicinal dietary functions are ignored.

Although most of the medicinal dietary plants had a maximum fidelity score and were widely used, the safety must be carefully checked. Thirty-nine percent of the medicinal diet plants are not commonly consumed food items (Table 1), although almost all of them are traditional herbs and the medicinal aspects are known. For example, Aconitum in its raw state is a highly toxic plant because of the compound aconitine [50]. There have been many reports of Aconitum poisoning and death in the Yunnan province [51], but it is still widely eaten by the Naxi. As in Qinling Mountain, the preparations of the Aconitum are special [50], and the process is strictly controlled to protect against toxic effects. Scientific evidence on the safety and detoxification of the medicinal dietary plants of the Naxi people must be established before widespread use.

Conclusion

The medicinal dietary plants used by the Naxi people are diverse. The lives of the Naxi people are closely related with the use of medicinal dietary plants and their associated knowledge of these plants is extensive. These plants are easy to collect and prepare, and are widely used when needed by the Naxi people. The main theory behind the traditional medicinal diet of the Naxi people is to prevent disease by strengthening the body.

A wide spectrum of disorders can be treated by medicinal diets. Most plants have a high fidelity level and are widely used. However, the safety of some medicinal dietary plants is not well understood, and the nutritional elements are unclear. Scientific evidence on the safety, detoxification, and nutrition of medicinal dietary plants of the Naxi people must be established before these medicinal dietary plants can be adopted by modern society to improve health and prevent diseases.

Abbreviations

FL: 

Fidelity level

TCM: 

Traditional Chinese medicine

Declarations

Acknowledgements

We are very grateful to the local people in Wenhai, Ludian, and Shihong villages who made this study possible, especially Huanliang He, Guoyan He, and Shen He, who provided invaluable information. We thank Professor Huai Huyin for his assistance. This work was funded by the General Program of National Natural Science Foundation of China (31270379) and National Science and Technology Basic Special of China (2012FY110300).

Authors’ Affiliations

(1)
Kunming Institute of Botany, Chinese Academy of Sciences
(2)
South China Botanical Garden, Chinese Academy of Sciences
(3)
University of Chinese Academy of Sciences

References

  1. Wu T-M. Food and western disease: health and nutrition from an evolutionary perspective. J Nutr Educ Behav. 2011;43:207–1.View ArticleGoogle Scholar
  2. Etkin NL. Edible medicines: an ethnopharmacology of food. Tucson: University of Arizona Press; 2008.Google Scholar
  3. Johns T. With bitter herbs they shall eat: chemical ecology and the origins of human diet and medicine. Tucson: The University of Arizona Press; 1990.Google Scholar
  4. Leonti M. The co-evolutionary perspective of the food-medicine continuum and wild gathered and cultivated vegetables. Genet Resour Crop Evol. 2012;59:1295–302.View ArticleGoogle Scholar
  5. Leonti M. Herbal teas and the continuum of the food-medicine complex: field methods, contextualisation and cultural consensus. J Ethnopharmacol. 2014;151:1028–30.View ArticlePubMedGoogle Scholar
  6. Pieroni A, Nebel S, Quave C, Münz H, Heinrich M. Ethnopharmacology of liakra: traditional weedy vegetables of the Arbëreshë of the Vulture area in southern Italy. J Ethnopharmacol. 2002;81:165–85.View ArticlePubMedGoogle Scholar
  7. Bonet MÀ, Valles J. Use of non-crop food vascular plants in Montseny biosphere reserve (Catalonia, Iberian Peninsula). Int J Food Sci Nutr. 2002;53:225–48.View ArticlePubMedGoogle Scholar
  8. Moerman D. North American food and drug plants. In: Etkin NL, editor. Eating on the wild side. Tucson: University of Arizona Press; 1994. p. 166–81.Google Scholar
  9. Etkin NL. Medicinal cuisines: diet and ethopharmacology. Pharm Biol. 1996;34:313–26.View ArticleGoogle Scholar
  10. Etkin NL, Ross PJ. Should we set a place for diet in ethnopharmacology? J Ethnopharmacol. 1991;32:25–36.View ArticlePubMedGoogle Scholar
  11. Etkin NL, Ross PJ. Food as medicine and medicine as food: an adaptive framework for the interpretation of plant utilization among the Hausa of northern Nigeria. Soc Sci Med. 1982;16:1559–73.View ArticlePubMedGoogle Scholar
  12. Gessler M, Hodel U. In situ conservation of plant genetic resources in home gardens in southern Vietnam. Malaysia: International Plant Genetic Resources Institute; 1997.Google Scholar
  13. Etkin NL. Plants in indigenous medicine and diet: biobehavioral approaches. East Sussex: Psychology Press; 1986.Google Scholar
  14. Fleuret A. Dietary and therapeutic uses of fruit in three Taita communities. In: Etkin NL, editor. Plants in indigenous medicine and diet: biobehavioural approaches. East Sussex: Psychology Press; 1986. p. 151–70.Google Scholar
  15. Ogle BM, Tuyet HT, Duyet HN, Dung NNX. Food, feed or medicine: the multiple functions of edible wild plants in Vietnam. Econ Bot. 2003;57:103–17.View ArticleGoogle Scholar
  16. Weng W, Chen J. The eastern perspective on functional foods based on traditional Chinese medicine. Nutr Rev. 1996;54:S11–6.View ArticlePubMedGoogle Scholar
  17. Chen J. Regularly control of functional food in China. Scand J Nutr. 2000;44:130–1.Google Scholar
  18. Unschuld PU. “Huang Di Nei Jing Su Wen”: nature, knowledge, imagery in an Ancient Chinese Medical Text. Oakland: University of California Press; 2003.View ArticleGoogle Scholar
  19. Liu XF. The study of ancient Chinese food therapy therapeutic method. PhD thesis. Beijing: China Academy of Chinese Medical Sciences; 2007.Google Scholar
  20. Jing BH, Li ZR. Chinese cultural of food therapy and medicinal diet. Heilongjiang Nat Ser. 2001;4:86–93.Google Scholar
  21. Tang JL, Liu BY, Ma KW. Traditional Chinese medicine. Lancet. 2008;372:1938–40.View ArticlePubMedGoogle Scholar
  22. McNutt K. Medicinals in food: part I: is science coming full circle? Nutr Today. 1995;30:218.View ArticleGoogle Scholar
  23. Wahlqvist M. Non-nutrients in foods: implications for the food industry. Food Australia. 1992;44:558–60.Google Scholar
  24. Lampe JW. Health effects of vegetables and fruit: assessing mechanisms of action in human experimental studies. Am J Clin Nutr. 1999;70:475–90.Google Scholar
  25. Craig WJ. Health-promoting properties of common herbs. Am J Clin Nutr. 1999;70:491–9.Google Scholar
  26. Balentine DA, Albano MC, Nair MG. Role of medicinal plants, herbs, and spices in protecting human health. Nutr Rev. 1999;57:41–5.View ArticleGoogle Scholar
  27. Tang NB, Yao HY. Review of the current situation and development prospects of Chinese dietotherapy and herbal medicinal diet. Dietotherapy Herbal Med Diet. 1997;04:45–8.Google Scholar
  28. Sun C. Study on the heritage of TCM and the fusion between TCM and Naxi Dongba medicine in Lijiang area. MSc thesis. Yunnan University of Traditional Chinese Medicine; 2013.Google Scholar
  29. Li RM, Editorial Committee of Local Records of Lijiang Naxi Autonomous County. Local Records of Lijiang Naxi Autonomous County. Yunnan: Yunnan People Press; 2001.Google Scholar
  30. Guo DL. Naxi history. Sichuan: Sichuan Nationalities Press; 1994.Google Scholar
  31. Yang FQ. The “Ancient Tea and Horse Caravan Road”, the “Silk Road” of Southwest China. Silk Road. 2004;2:29–33.Google Scholar
  32. Yang FQ. The Westbound Tea Horse Road. Shanghai: Shanghai People press; 2009.Google Scholar
  33. Guo HJ. Medical ethnobotany of Naxi People. MSc thesis. Kunming: Kunming Institute of Botany, Academia Sinica; 1989.Google Scholar
  34. Yang L, Ahmed S, Stepp JR. Comparative homegarden medical ethnobotany of Naxi healers and farmers in Northwestern Yunnan. China J Ethnobiol Ethnomed. 2014;10:6.View ArticleGoogle Scholar
  35. Weckerle CS, Huber FK, Yang YP. Plant knowledge of the Shuhi in the Hengduan Mountains, southwest China. Econ Bot. 2006;60:3–23.View ArticleGoogle Scholar
  36. Ying TS, Zhang YL. The Endemic Genera of Seed Plants of China. Beijing: Science Press; 1993.Google Scholar
  37. Wang XP, Yang ZH, Hong JS. Centers of Plant Diversity. In: Davis SD, Heywood VH, Hamilton AC, editors. Regional Overview: China and East Asia. Volume 2. Oxford: Information Press; 1995.Google Scholar
  38. Luo P. Traditional ethnic and biodiversity conservation in the mountain areas of Northwestern Yunnan, China. PhD thesis. Kunming: Kunming Institute of Botany, Chinese Academy of Sciences; 2001.Google Scholar
  39. Pei SJ, Huai HY. Ethnobotany. Shanghai: Shanghai Science and Technology Press; 2007.Google Scholar
  40. Friedman J, Yaniv Z, Dafni A. A preliminary classification of the healing potential of medicinal plants, based on a rational analysis of an ethnopharmacological field survey among Bedouins in the Negev Desert. Israel J Ethnopharmacol. 1986;16(2):275–87.View ArticleGoogle Scholar
  41. Alexiades MN. Selected guidelines for ethnobotanical research-a field manual. New York, USA: The New York Botanical Garden; 1996.Google Scholar
  42. Kim H, Song MJ. Analysis of traditional knowledge about medicinal plants utilized in communities of Jirisan National Park (Korea). J Ethnopharmacol. 2014;153(1):85–9.View ArticlePubMedGoogle Scholar
  43. American Anthropological Association Code of Ethics [http://www.aaanet.org/issues/policy-advocacy /code-of-ethics.cfm].
  44. Kang Y, Luczaj L, Kang J. Wild food plants used by the Tibetans of Gongba Valley (Zhouqu county, Gansu, China). J Ethnobiol Ethnomed. 2014;10:20.View ArticlePubMed CentralPubMedGoogle Scholar
  45. International Society of Ethnobiology Code of Ethics (with 2008 additions). [http://ethnobiology.net/code-of-ethics/].
  46. Kong QX. Study on the characteristics of medicinal diet of Southern Yunnan Materia Medica. J Yunnan College Traditional Chinese. 1990;13(3):9–11.Google Scholar
  47. Wujisguleng W, Liu YL, Long CL. Ethnobotanical review of food uses of Polygonatum (Convallariaceae) in China. Acta Soc Bot Pol. 2012;81(4):239–44.View ArticleGoogle Scholar
  48. Zhang SJ. Ethnobotanical study on medicine food homology plants of Taibai Mountain region. MSc thesis. Yangling: Northwest Agriculture & Forestry University; 2013.Google Scholar
  49. Gu W. Ethnobotanical investigation on medicinal-edible plants used by the Dai people in Xishuangbanna. PhD thesis. Kunming: Kunming Institute of Botany, Chinese Academy of Sciences; 2013.Google Scholar
  50. Kang YX, Luczaj L, Sebastian Y. The highly toxic Aconitum Carmichaelii Debeaux as a root vegetable in the Qinling Mountains (Shaanxi, China). Genet Resour Crop Evol. 2012;59(7):1569–75.View ArticleGoogle Scholar
  51. 4 famers were killed and 18 people were get poisoned at home by eating aconitum in Lijiang Area [http://society.yunnan.cn/html/2012-02/28/content_2065356.htm].

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