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MYC2, MYC3, and MYC4 function additively in wounding-induced jasmonic acid biosynthesis and catabolism.
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-02-20 , DOI: 10.1111/jipb.12902 Cuiping Zhang 1, 2 , Yunting Lei 1 , Chengkai Lu 1 , Lei Wang 1 , Jianqiang Wu 1
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-02-20 , DOI: 10.1111/jipb.12902 Cuiping Zhang 1, 2 , Yunting Lei 1 , Chengkai Lu 1 , Lei Wang 1 , Jianqiang Wu 1
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Jasmonic acid (JA) plays a critical role in plant defenses against insects and necrotrophic fungi. Wounding or lepidopteran insect feeding rapidly induces a burst of JA in plants, which usually reaches peak values within 1 to 2 h. The induced JA is converted to JA‐Ile and perceived by the COI1‐JAZ co‐receptor, leading to activation of the transcription factors MYC2 and its homologs, which further induce JA‐responsive genes. Although much is known about JA biosynthesis and catabolism enzymes and JA signaling, how JA biosynthesis and catabolism are regulated remain unclear. Here, we show that in Arabidopsis thaliana MYC2 functions additively with MYC3 and MYC4 to regulate wounding‐induced JA accumulation by directly binding to the promoters of genes function in JA biosynthesis and catabolism to promote their transcription. MYC2 also controls the transcription of JAV1 and JAM1, which are key factors controlling JA biosynthesis and catabolism, respectively. In addition, we also found that MYC2 could bind to the MYC2 promoter and self‐inhibit its own expression. This work illustrates the central role of MYC2/3/4 in controlling wounding‐induced JA accumulation by regulating the transcription of genes involved in JA biosynthesis and catabolism.
中文翻译：
MYC2，MYC3和MYC4在伤口诱导的茉莉酸的生物合成和分解代谢中具有附加作用。
茉莉酸（JA）在植物防御昆虫和坏死性真菌中起着至关重要的作用。伤口或鳞翅目昆虫的摄食迅速诱导了植物中JA的爆发，通常在1-2小时内达到峰值。诱导的JA转化为JA-Ile，并被COI1-JAZ协同受体感知，从而导致转录因子MYC2及其同源物的激活，从而进一步诱导JA响应基因。尽管对JA生物合成和分解代谢酶以及JA信号的了解很多，但是如何调节JA生物合成和分解代谢的方法仍不清楚。在这里，我们证明了拟南芥MYC2与MYC3和MYC4共同发挥作用，通过直接与JA生物合成和分解代谢中促进其转录的基因启动子结合，来调节创伤诱导的JA积聚。MYC2还控制JAV1和JAM1的转录，这分别是控制JA生物合成和分解代谢的关键因素。此外，我们还发现MYC2可以与MYC2启动子结合并自我抑制其自身表达。这项工作通过调节参与JA生物合成和分解代谢的基因的转录，说明了MYC2 / 3/4在控制伤口诱导的JA积累中的核心作用。
更新日期：2020-02-20
中文翻译：
MYC2，MYC3和MYC4在伤口诱导的茉莉酸的生物合成和分解代谢中具有附加作用。
茉莉酸（JA）在植物防御昆虫和坏死性真菌中起着至关重要的作用。伤口或鳞翅目昆虫的摄食迅速诱导了植物中JA的爆发，通常在1-2小时内达到峰值。诱导的JA转化为JA-Ile，并被COI1-JAZ协同受体感知，从而导致转录因子MYC2及其同源物的激活，从而进一步诱导JA响应基因。尽管对JA生物合成和分解代谢酶以及JA信号的了解很多，但是如何调节JA生物合成和分解代谢的方法仍不清楚。在这里，我们证明了拟南芥MYC2与MYC3和MYC4共同发挥作用，通过直接与JA生物合成和分解代谢中促进其转录的基因启动子结合，来调节创伤诱导的JA积聚。MYC2还控制JAV1和JAM1的转录，这分别是控制JA生物合成和分解代谢的关键因素。此外，我们还发现MYC2可以与MYC2启动子结合并自我抑制其自身表达。这项工作通过调节参与JA生物合成和分解代谢的基因的转录，说明了MYC2 / 3/4在控制伤口诱导的JA积累中的核心作用。
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