Biotechnology Bulletin ›› 2021, Vol. 37 ›› Issue (10): 26-33.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0588

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Isolation and Identification of the Endophytic Fungi of‘Bama hemp’ Under Salt Stress and Its Diversity Analysis

LI E1(), HUANG Yong1, MENG Yuan-yuan1, LI Xuan2, DU Guang-hui2(), LIU Fei-hu1,2()   

  1. 1. College of Life Sciences,Yunnan University,Kunming 650091
    2. School of Agriculture,Yunnan University,Kunming 650091
  • Received:2020-05-14 Online:2021-10-26 Published:2021-11-12
  • Contact: DU Guang-hui,LIU Fei-hu E-mail:2049829995@qq.com;dgh2012@ynu.edu.cn;dmzpynu@126.com

Abstract:

The aim is to study the dynamic changes of plant endophytic fungi under different concentrations of salt treatment in “ Bama hemp ”,and to screen endophytic fungi closely related to alleviating salt stress. The salt tolerant industrial cannabis variety ‘Bama hemp’ screened in the previous period was as study material. It was treated with different concentrations(0,100,200,and 300 mmol/L)of NaCl salt. The traditional method was used to separate and purify endophytic fungi. The strains were identified by rDNA-ITS sequence analysis combined with morphology. A total of 543 fungi were isolated from 1 400 cannabis tissue tablets,belonging to 44 families,18 genera and 44 species. It was found that salt stress treatment affected the composition of endophytic fungi in cannabis. The endophytic fungi isolated under different concentrations of NaCl were different,and the similarity coefficient was < 0.5. With the increase of NaCl concentration,the richness,diversity index and isolation rate of endophytic fungi decreased first and then increased. Among them,the richness and diversity index were the lowest under the treatment of 200 mmol/L NaCl,while the separation rate was the lowest under 100 mmol/L NaCl treatment. In all treatments,Chaetomium globosum,Trichoderma harzianum,Nemania diffusa,Cladosporium,Annulohypoxylon stygium,et al. were isolated,which were closely related to stress resistance.

Key words: industrial hemp, salt stress, endophytic fungi