H and HL synergistically regulate jasmonate-triggered trichome formation in tomato.
H and HL synergistically regulate jasmonate-triggered trichome formation in tomato.
复制标题
H和HL协同调节番茄中果岭酸触发的毛状体形成。
DOI：
10.1093/hr/uhab080
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发表时间：
2022-01-20
影响因子：
8.7
通讯作者：
Wu S
中科院分区：
文献类型：
--
作者：
Hua B;Chang J;Han X;Xu Z;Hu S;Li S;Wang R;Yang L;Yang M;Wu S;Shen J;Yu X;Wu S
毛状体的发育受各种逆境的影响，毛状体保护植物免受草食动物的侵害。在番茄中，之前的研究表明，应激触发的茉莉酸（JA）信号传导会影响毛状体的形成，但其潜在机制尚未完全解决。在这里，我们发现，两个C2 H2锌指蛋白协同调节JA诱导的毛状体形成在番茄。自然发生的突变在H基因和它的密切同源H样的自发突变体，LA 3172，导致严重影响毛状体的发展。与相应的单突变体相比，h/hl双突变体在所有组织中显示出更严重的毛状体缺陷。尽管它们的部分冗余功能，H和HL基因调节毛状体的形成在空间上不同的方式，HL更多地参与下胚轴和叶，而H更多地参与茎和萼片。此外，H/HL的活性对于JA触发的毛状体形成是必不可少的。JA信号传导抑制剂SlJAZ 2通过物理相互作用抑制H和HL的活性，导致THM 1的激活，THM 1是毛状体形成的负调节因子。我们的研究结果提供了新的见解毛状体形成的机制，在响应胁迫诱导的JA信号在番茄。
The development of trichomes, which protect plants against herbivores, is affected by various stresses. In tomato, previous studies showed that stress-triggered jasmonic acid (JA) signaling influences trichome formation, but the underlying mechanism is not fully resolved. Here, we found that two C2H2 zinc finger proteins synergistically regulate JA-induced trichome formation in tomato. The naturally occurring mutations in the H gene and its close homolog H-like in a spontaneous mutant, LA3172, cause severely affected trichome development. Compared with the respective single mutant, the h/hl double mutant displayed more severe trichome defects in all tissues. Despite their partially redundant function, the H and HL genes regulate trichome formation in a spatially distinct manner, with HL more involved in hypocotyls and leaves while H is more involved in stems and sepals. Furthermore, the activity of H/HL is essential for JA-triggered trichome formation. The JA signaling inhibitor SlJAZ2 represses the activity of H and HL via physical interaction, resulting in the activation of THM1, a negative regulator of trichome formation. Our results provide novel insight into the mechanism of trichome formation in response to stress-induced JA signaling in tomato.
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通讯作者：
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作者：
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