Subjects: Biology >> Botany >> Applied botany submitted time 2021-12-19 Cooperative journals: 《广西植物》
Abstract： Angiopteris esculenta is one of the most important wild substitutes for staple food in Dulong’s communities (the least populated ethnic group in Yunnan Province, China) for centuries. For a long time, the Dulong people collect the underground parts of A. esculenta to extract flour and make into food. In order to study and record the traditional knowledge of Angiopteris esculenta, and reveal the scientific basis of this plant consumed by Dulong people, ethnobotanical methods were employed to investigate and document the traditional knowledge about A. esculenta. Approaches of food science were used to reveal the basic components, appearance, physical and chemical properties, and gelatinization characteristics of A. esculenta flour in the present paper. The results were as follows: (1) A. esculenta is a multipurposed plant in the traditional livelihood of Dulong people. Local people employed this plant for edible purpose, medicinal purpose, ornamental purpose and woody purpose. Quantitative analysis showed that the relative frequency of citation (RFC) of the edibleness was much higher than that of other uses, which shows its main way as staple food. (2) The traditional uses of fern flour extracted from the underground part of A. esculenta imply rationalities. There is high starch content in the flour, and the total starch content is 86.2%. A. esculenta flour contains various mineral elements necessary for human body. (3) The flour has good physical and chemical properties, specifically, the retrogradation and freeze-thaw stability are strong, which can be used in the production and process of frozen food and starch products. The regeneration value and attenuation value of starch were much lower than that of common starch, which indicated that it had good stability of hot paste and cold paste, and not easy to regenerate, thus imply the good processability in food industry. The research results of the physical and chemical properties provide a theoretical basis for the subsequent processing and utilization of A. esculenta. In conclusion, A. esculenta flour has a good potential for utilization and further development. It is expected to play a positive role for increasing local residents’ income and for rural revitalization in remote areas, through the approaches of artificial cultivation.
Subjects: Biology >> Botany >> Applied botany submitted time 2018-09-07 Cooperative journals: 《广西植物》
Abstract： In order to get the latest information and development researches filed of DNA barcoding of plants, and discuss its role in biodiversity conservation. Used bibliometrics, Histcite and citespaces to analyze literatures of DNA barcoding in plants based on Web of Sciences database to, and analyze Citation counts, research hot and research front visualization. The results showed the rate of contribution of literatures was the biggest of Chinese, American, Canadian authors. Chinese institutions published literatures counts than others countries, while literatures from American and Canadian institutions have more higher quality and influence. This research field has gotten peak at 2009 based on citation visualization analysis. The research front and hot focus on species identify and biodiversity application, find the suited candidates DNA barcoding sequences and refining the identical technology. Chinese authors play a leading role and have strength influence at DNA barcoding of plants. Chinese government encourages traditional Chinese medicine industry to promote the development of DNA barcoding technology at China. But the quality and influence of published literatures have a gap between China and developed countries, Chinese institutions should increase cooperation with the developed countries institutions and promote itself research ability. It is very important that DNA barcoding technology at species identify and biodiversity conversation. Tomorrow’s Outlook for Plant DNA Barcoding is building the global plant DNA barcode library and new DNA markers and new sequencing technologies.
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