Fulvic acid enhances drought resistance in tea plants by regulating the starch and sucrose metabolism and certain secondary metabolism

作者：Chen Qiu, Jianhao Sun, Jiazhi Shen, Shuning Zhang, Yiqian Ding, Zhongshuai Gai, Kai Fan, Lubin Song, Bo Chen, Zhaotang Ding, Yu Wang · 发表于：Journal of Proteomics · 年份：2021 · DOI：10.1016/j.jprot.2021.104337 · 被引用次数：60 · 研究领域：Plant Growth Enhancement Techniques、Plant responses to elevated CO2、Plant Stress Responses and Tolerance

The aim of this work was to gain insight into the molecular mechanisms underlying the effect of fulvic acid on drought-exposed tea plants. We performed proteomic analysis of fulvic acid-treated tea leaves from the target plants using tandem mass tag quantitative labeling technology and compared the results with those of a previous transcriptomic analysis. We identified 48 and 611 differentially abundant proteins in the leaves of tea plants treated with fulvic acid compared with the control under mild and severe drought, respectively. Comparative analysis showed that, under severe drought, 55 genes had similar expression patterns at the transcriptome and proteome levels, such as PAL, GBE, GBSS and bAS. Bioinformatic analysis revealed that those genes were mainly related to the starch and sucrose metabolism, phenylpropanoid biosynthesis and triterpenoid biosynthesis. SIGNIFICANCE: This study broadens the understanding of the molecular mechanisms underlying the improved drought resistance seen in tea plants in the presence of fulvic acid and provides a basis for further research on the genomics of drought tolerance in these plants. In addition, these findings could be used to develop new guidance strategies for improved drought management systems in tea plantation.