Comparative Research on Metabolites of Different Species of Epichloë Endophytes and Their Host Achnatherum sibiricum
Yongkang Deng; Yuan Gao; Chenxi Li; Junzhen Zhang; Xiaowen Fan; Nianxi Zhao; Yubao Gao; Anzhi Ren
Achnatherum sibiricum can be infected by two species of fungal endophytes, Epichloë: :gansuensis (Eg) and Epichloë: :sibirica (Es). In this study, the metabolites of Eg, Es, and their infected plants were studied by GC&ndash:MS analysis. The results showed that the metabolic profiles of Eg and Es were similar in general, and only six differential metabolites were detected. The direct effect of endophyte infection on the metabolites in A. sibiricum was that endophyte-infected plants could produce mannitol, which was not present in uninfected plants. Epichloë: infection indirectly caused an increase in the soluble sugars in A. sibiricum related to growth and metabolites related to the defense against pathogens and herbivores, such as &alpha:-tocopherol, &alpha:-linolenic acid and aromatic amino acids. Epichloë: infection could regulate galactose metabolism, starch and sucrose metabolism, tyrosine metabolism and phenylalanine metabolism of host grass. In addition, there was a significant positive correlation in the metabolite contents between the endophyte and the host.
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