Histone demethylases control root elongation in response to stress-signaling hormone abscisic acid
Histone demethylases control root elongation in response to stress-signaling hormone abscisic acid
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组蛋白去甲基酶响应应激信号激素脱落酸控制根伸长
DOI：
10.1080/15592324.2019.1604019
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发表时间：
2019
影响因子：
2.9
通讯作者：
Ito Toshiro
中科院分区：
文献类型：
--
作者：
Wu Jinfeng;Yamaguchi Nobutoshi;Ito Toshiro
脱落酸（ABA）在植物生长发育过程中对各种胁迫起着至关重要的作用。拟南芥组蛋白去甲基化酶JUMONJI-C DOMAIN-CONTAINING PROTEIN 30 （JMJ30）和JMJ32在萌发后（萌发后2-3天）控制aba介导的生长停滞。然而，JMJ30和JMJ32在植物发育后期ABA应答中的作用仍不清楚。本研究表明，JMJ30和JMJ32介导了根发育过程中ABA的响应。在ABA存在的情况下，jmj30和jmj32双突变体的主根比野生型长。snf1相关蛋白激酶2.8（SnRK2.8）基因的功能缺失突变也导致对ABA的反应中主根表型变长。jmj30 / jmj32和snrk2.8的表达分析表明，它们在苗期根伸长过程中通过相同的途径介导ABA响应。我们的研究结果强调了JMJ30/JMJ32-SnRK2.8模块在两个不同发育阶段的重要性。
Abscisic acid (ABA) plays critical roles during plant growth and development in response to various stresses.Arabidopsis thalianahistone demethylases JUMONJI-C DOMAIN-CONTAINING PROTEIN 30 (JMJ30) and JMJ32 control ABA-mediated growth arrest during the post-germination stage (2–3 days after germination). However, the roles of JMJ30 and JMJ32 in ABA responses at later stages of plant development remain largely unknown. Here, we show that JMJ30 and JMJ32 mediate ABA responses during root development. In the presence of ABA,jmj30 jmj32double mutants display longer primary roots than the wild type. Loss-of-function mutation in theSNF1-RELATED PROTEIN KINASE 2.8(SnRK2.8) gene also led to a longer primary root phenotype in response to ABA. Analysis ofJMJ30/JMJ32andSnRK2.8expression suggested that they act in the same pathway to mediate ABA responses during root elongation at the seedling stage. Our findings highlight the importance of the JMJ30/JMJ32-SnRK2.8 module at two different developmental stages.