Endogenous auxin and jasmonic acid levels are differentially modulated by abiotic stresses in rice.
Endogenous auxin and jasmonic acid levels are differentially modulated by abiotic stresses in rice.
复制标题
DOI：
10.3389/fpls.2013.00397
复制
发表时间：
2013
影响因子：
5.6
通讯作者：
Xiong L
中科院分区：
文献类型：
--
作者：
Du H;Liu H;Xiong L
干旱、盐碱和恶劣温度等非生物胁迫是植物生长和繁殖的主要限制因素。植物对这些胁迫的反应是由一系列调节网络协调的，包括内源性脱落酸（ABA）的诱导，这是一种有充分记录的植物激素，用于逆境反应。然而，这些非生物胁迫是否或如何影响其他植物激素的内源性生物合成或代谢仍然是未知的。本文报道了水稻在不同非生物胁迫条件下内源吲哚-3-乙酸（IAA）和茉莉酸（JA）水平的变化以及这些激素的生物合成或信号传导相关基因的表达。干旱胁迫后IAA含量降低，冷、热胁迫显著提高。生长素调控的根尖向地性受到冷胁迫的抑制。在这些胁迫下，许多参与IAA生物合成和信号传导的基因在转录水平上发生了变化，这种变化与内源IAA水平的变化基本一致。内源JA含量在干旱和寒冷胁迫下显著增加，而在热胁迫下降低。因此，干旱和寒冷处理诱导了许多参与JA生物合成和信号传导的基因，但这些基因受到热胁迫的显著抑制。我们得出结论，水稻内源IAA和JA水平受到非生物胁迫的差异调节，这暗示了这些激素在胁迫反应中的不同作用。
Abiotic stresses such as drought, salinity, and adverse temperatures are major limiting factors for plant growth and reproduction. Plant responses to these stresses are coordinated by arrays of regulatory networks including the induction of endogenous abscisic acid (ABA), a well documented phytohormone for stress responses. However, whether or how these abiotic stresses affect the endogenous biosynthesis or metabolism of other phytohormones remains largely unknown. Here, we report the changes of endogenous indole-3-acetic acid (IAA) and jasmonic acid (JA) levels and expression of genes related to the biosynthesis or signaling of these hormones in rice under various abiotic stress conditions. The IAA content was decreased after drought stress, but it was significantly increased under cold and heat stresses. And the auxin-regulated gravitropism of root tip was inhibited by cold stress. Many genes involved in the IAA biosynthesis and signaling were changed in transcript level under these stresses, and the changes were essentially in agreement with the change of endogenous IAA level. Interestingly, the endogenous JA content was increased markedly under drought and cold stresses, but it was reduced by heat stress. Accordingly, many genes involved in JA biosynthesis and signaling were induced by drought and cold treatment but these genes were significantly suppressed by heat stress. We concluded that endogenous levels of IAA and JA were differentially regulated by abiotic stresses in rice, implying diverse roles of these hormones in stress responses.
登录
查看更多内容
一种同时定量多种植物激素和代谢物的便捷方法：在水稻-细菌相互作用研究中的应用
影响因子：
5.1
作者：
Liu H;Li X;Xiao J;Wang S
通讯作者：
Wang S
影响因子：
27.5
作者：
Kim, Jeong Im;Baek, Dongwon;Yun, Dae-Jin
通讯作者：
Yun, Dae-Jin
影响因子：
7.4
作者：
Rashotte, AM;Brady, SR;Muday, GK
通讯作者：
Muday, GK
影响因子：
7.4
作者：
Du, Hao;Wang, Nili;Xiong, Lizhong
通讯作者：
Xiong, Lizhong
影响因子：
11.6
作者：
Oikawa, Tetsuo;Kyozuka, Junko
通讯作者：
Kyozuka, Junko