OsMADS57 together with OsTB1 coordinates transcription of its target OsWRKY94 and D14 to switch its organogenesis to defense for cold adaptation in rice.
OsMADS57 together with OsTB1 coordinates transcription of its target OsWRKY94 and D14 to switch its organogenesis to defense for cold adaptation in rice.
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DOI：
10.1111/nph.14977
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发表时间：
2018-04
期刊：
影响因子：
--
通讯作者：
Chong K
中科院分区：
文献类型：
--
作者：
Chen L;Zhao Y;Xu S;Zhang Z;Xu Y;Zhang J;Chong K
植物通过改变其发育来适应环境，通过触发多种信号通路来保护自身免受不利条件如低温胁迫的影响;然而，关于植物如何在分子水平上协调发育模式和胁迫反应知之甚少。在这里，我们证明了相互作用的转录因子OsMADS 57和OsTB 1直接靶向防御基因OsWRKY 94和器官发生基因D14来权衡控制/调节水稻耐冷性的功能。过量表达OsMADS 57可维持低温胁迫下水稻分蘖的生长。OsMADS 57直接与OsWRKY 94的启动子结合，激活其转录以响应冷胁迫，同时在常温下抑制其活性。OsTB 1在常温和低温下均能直接靶向抑制OsWRKY 94的表达。然而，在低温处理下，OsMADS 57直接促进D14的转录以抑制分蘖，而在正常条件下，D14的转录被抑制以促进分蘖。我们的研究结果强调了协调水稻器官发生和耐冷性的分子遗传机制，这支持并扩展了最近的工作，表明低温胁迫环境影响器官分化。
Plants modify their development to adapt to their environment, protecting themselves from detrimental conditions such as chilling stress by triggering a variety of signaling pathways; however, little is known about how plants coordinate developmental patterns and stress responses at the molecular level. Here, we demonstrate that interacting transcription factors OsMADS57 and OsTB1 directly target the defense gene OsWRKY94 and the organogenesis gene D14 to trade off the functions controlling/moderating rice tolerance to cold. Overexpression of OsMADS57 maintains rice tiller growth under chilling stress. OsMADS57 binds directly to the promoter of OsWRKY94, activating its transcription for the cold stress response, while suppressing its activity under normal temperatures. In addition, OsWRKY94 was directly targeted and suppressed by OsTB1 under both normal and chilling temperatures. However, D14 transcription was directly promoted by OsMADS57 for suppressing tillering under the chilling treatment, whereas D14 was repressed for enhancing tillering under normal condition.We demonstrated that OsMADS57 and OsTB1 conversely affect rice chilling tolerance via targeting OsWRKY94. Our findings highlight a molecular genetic mechanism coordinating organogenesis and chilling tolerance in rice, which supports and extends recent work suggesting that chilling stress environments influence organ differentiation.
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