数字农科院2.0

An R2R3 Myb Transcription Factor Confers Brown Planthopper Resistance By Regulating The Phenylalanine Ammonia-Lyase Pathway In Rice

文献类型： 外文期刊

作者： He, J; Liu, YQ; Yuan, DY; Duan, MJ; Liu, YL; Shen, ZJ; Yang, CY; Qiu, ZY; Liu, DM; Wen, PZ; Huang, J; Fan, DJ; Xiao, SZ; Xin, YY; Chen, XN; Jiang, L; Wang, HY; Yuan, LP; Wan, JM

作者机构：

关键词： Rice; Brown Planthopper; Phenylalanine Ammonia-Lyase; Salicylic Acid; Lignin

期刊名称： PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

ISSN： 0027-8424

年卷期： 2020 年 117 卷 1 期

页码：

收录情况： JCR（2021版）

摘要： Brown planthopper (BPH) is one of the most destructive insects affecting rice (Oryza sativa L.) production. Phenylalanine ammonia-lyase (PAL) is a key enzyme involved in plant defense against pathogens, but the role of PAL in insect resistance is still poorly understood. Here we show that expression of the majority of PALs in rice is significantly induced by BPH feeding. Knockdown of OsPALs significantly reduces BPH resistance, whereas overexpression of OsPAL8 in a susceptible rice cultivar significantly enhances its BPH resistance. We found that OsPALs mediate resistance to BPH by regulating the biosynthesis and accumulation of salicylic acid and lignin. Furthermore, we show that expression of OsPAL6 and OsPAL8 in response to BPH attack is directly up-regulated by OsMYB30, an R2R3 MYB transcription factor. Taken together, our results demonstrate that the phenylpropanoid pathway plays an important role in BPH resistance response, and provide valuable targets for genetic improvement of BPH resistance in rice.

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