数字农科院2.0

Novel Plant Growth Regulator Guvermectin from Plant Growth- Rhizobacteria Boosts Biomass and Grain Yield in Rice

文献类型： 外文期刊

作者： Liu, Chongxi;Bai, Lu;Cao, Peng;Li, Shanshan;Huang, Sheng-Xiong;Wang, Jidong;Li, Lei;Zhang, Ji;Zhao, Junwei;Song, Jia;Sun, Peng;Zhang, Yanyan;Zhang, Hui;Guo, Xiaowei;Yang, Xilang;Tan, Xinqiu;Liu, Wende;Wang, Xiangjing;Xiang, Wensheng

作者机构：

关键词： guvermectin;plant growth regulator;plant growth-promoting rhizobacteria;rice yield;transcriptome

期刊名称： JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

ISSN： 0021-8561

年卷期： 2023 年

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： Food is a fundamental human right, and global food security is threatened by crop production. Plant growth regulators (PGRs) play an essential role in improving crop yield and quality, and this study reports on a novel PGR, termed guvermectin (GV), isolated from plant growth-promoting rhizobacteria, which can promote root and coleoptile growth, tillering, and early maturing in rice. GV is a nucleoside analogue like cytokinin (CK), but it was found that GV significantly promoted root and hypocotyl growth, which is different from the function of CK in Arabidopsis. The Arabidopsis CK receptor triple mutant ahk2-2 ahk33 cre1-12 still showed a GV response. Moreover, GV led different growth-promoting traits from auxin, gibberellin (GA), and brassinosteroid (BR) in Arabidopsis and rice. The results from a four-year field trial involving 28 rice varieties showed that seed soaking treatment with GV increased the yields by 6.2 to 19.6%, outperforming the 4.0 to 10.8% for CK, 1.6 to 16.9% for BR, and 2.2 to 7.1% for GA-auxin-BR mixture. Transcriptome analysis demonstrated that GV induced different transcriptome patterns from CK, auxin, BR, and GA, and SAUR genes may regulate GV-mediated plant growth and development. This study suggests that GV represents a novel PGR with a unique signal perception and transduction pathway in plants.

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