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Effects of NaCl stress on metabolites of two endophytic fungi of Casuarina equisetifolia*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2020 01
Page:
1-10
Research Field:
Articles
Publishing date:

Info

Title:
Effects of NaCl stress on metabolites of two endophytic fungi of Casuarina equisetifolia*
Author(s):
LI Guanjun12 LIU Xinming12 LIANG Anjie12 LIN Yongming12** & LI Jian12**
1 College of Forestry,Fujian Agriculture and Forestry University, Fuzhou 350002, China
2 Key Laboratory of Forest ecosystem process and Management of Fujian Province, Fuzhou 350002, China
Keywords:
Endophyte salt stress metabolite plant hormone
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.05034
DocumentCode:

Abstract:
In order to study the relationship between salt stress and secondary metabolites of endophytic fungi of Casuarina equisetifolia, the metabolites of two endophytic fungi (Y6, Z1) and their mixed strains of Casuarina equisetifolia grown in different salinity were detected by high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS). Y6 strain fermentation broth has the highest gibberellin content at 5% salinity, significantly different from other treatments (P < 0.05), the zeatin content in the fermentation broth of Z1 strain was significantly higher than that in the fermentation broth of Y6 strain and mixed strain. At 0% salinity, the content of indole-3-acetic acid in the fermentation broth of the mixed strain was the highest, significantly different from other treatments (P < 0.05), the maximum content of indole-3-acetic acid in the fermentation broth of Y6 strain and Z1 strain was 1% and 3% salinity, respectively. Secondary metabolites with a relative content of more than 30% mainly include 3-Isobutylhexahydropyrrolo[1,2-a]pyrazine-1,4-dione; 1,1,4,7-Tetramethyldecahydro-1H-cyclopropa[e]azulen-4-ol; 2-butyl-1-octanol; 5-Nitroso-2,4,6-pyrimidinetriamine; 1,2-Benzenedicarboxylic acid and 5-Hyddroxymethylfurfurole, the secondary metabolite species of endophytic fungi grown in high salt (5%) environment were different from the secondary metabolite species of endophytic fungi grown in low salt (0%) environment. The results of this study demonstrated that both endophytic fungi and their mixed strains can produce three plant hormones, indole-3-acetic acid, gibberellin and zein, endophytic fungi species and growing environment (different salinity) can affect endophytic fungal secondary metabolites, endophytic fungi grown under high salt (5%) environment can produce a variety of secondary metabolites, however, whether the above substances have anti-salt, growth-promoting and antibacterial effects on the growth of Casuarina equisetifolia seedlings and its mechanism remains to be further studied.

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Last Update: 2019-06-19