Cuticular Wax Modification by Epichloe Endophyte in Achnatherum inebrians under Different Soil Moisture Availability

文献类型： 外文期刊

第一作者： Zhao, Zhenrui

作者： Zhao, Zhenrui;Ju, Yawen;Kou, Mingzhu;Zhang, Xingxu;Nan, Zhibiao;Ju, Yawen;Tian, Mei;Christensen, Michael John

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关键词： Epichloe gansuensis; Achnatherum inebrians; soil moisture availability; cuticular wax; gas chromatography-mass spectrometry; transcriptome analysis

期刊名称：JOURNAL OF FUNGI （ 影响因子：5.724； 五年影响因子：6.413 ）

ISSN：

年卷期： 2022 年 8 卷 7 期

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收录情况： SCI

摘要： The cuticular wax serves as the outermost hydrophobic barrier of plants against nonstomatal water loss and various environmental stresses. An objective of this study was to investigate the contribution of the mutualistic fungal endophyte Epichloe gansuensis to leaf cuticular wax of Achnatherum inebrians under different soil moisture availability. Through a pot experiment and gas chromatography-mass spectrometry (GC-MS) analysis, our results indicated that the hydrocarbons were the dominant components of leaf cuticular wax, and the proportion of alcohols, aldehydes, amines, and ethers varied with the presence or absence of E. gansuensis and different soil moisture availability. Amines and ethers are unique in endophyte-free (EF) A. inebrians plants and endophyte-infected (EI) A. inebrians plants, respectively. By transcriptome analysis, we found a total of 13 differentially expressed genes (DEGs) related to cuticular biosynthesis, including FabG, desB, SSI2, fadD, BiP, KCS, KAR, FAR, and ABCB1. A model is proposed which provides insights for understanding cuticular wax biosynthesis in the association of A. inebrians plants with E. gansuensis. These results may help guide the functional analyses of candidate genes important for improving the protective layer of cuticular wax of endophyte-symbiotic plants.

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