勤读立耕 立己达人
,THU
July 16
这是精华师兄的第69篇论文翻译
第一作者：Yujin Yuan
通讯单位：重庆大学
通讯作者：Wei Deng*（dengwei1977@）
出版期刊：Plant Biotechnology Journal
R2R3 MYB‐dependent auxin signaling regulates trichome formation, and increased trichome density confers spider mite tolerance on tomato
依赖R2R3 MYB的生长素信号转导通路调控番茄表皮毛形成，表皮毛密度赋予了其对朱砂叶螨的抗性
Abstract
Unicellular and multicellular tomato trichomes function as mechanical and chemical barriers against herbivores. Auxin treatment increased the formation of II, V and VI type trichomes in tomato leaves. The auxin response factor geneSlARF4, which was highly expressed in II, Vand VI type trichomes, positivelyregulated the auxin‐induced formation of II, V and VI type trichomes in the tomato leaves.
单细胞和多细胞的番茄表皮毛是抵御草食动物的机械和化学屏障。生长素处理促进了番茄叶片II型、V型和VI型表皮毛的形成。生长素反应因子基因SlARF4在番茄叶片II、V和VI型表皮毛中高表达，对生长素诱导的II型、V型和VI型表皮毛的形成有正向调节作用。
SlARF4overexpression plants with high densities of these trichomes exhibited tolerance to spider mites. TwoR2R3MYB genes,SlTHM1andSlMYB52,were directly targeted and inhibited bySlARF4.SlTHM1was specifically expressed in II and VI type trichomes and negatively regulated the auxin‐inducedformation of II and VI type trichomes in the tomato leaves.SlTHM1downregulation plants with high densities of II and VI type trichomes also showed tolerance to spider mites.
这些有高密度表皮毛的SIARF4过表达植株表现出对朱砂叶螨的抗性。两个R2R3 MYB基因(SlTHM1和SlMYB52)被SIARF4直接靶向并抑制。SLTHM1特异表达于Ⅱ型和VI型表皮毛中，负调控生长素诱导的番茄叶片II型和VI型表皮毛的形成。有高密度Ⅱ型和VI型表皮毛的SITHM1下调植株也表现出对朱砂叶螨的抗性。
SlMYB52was specifically expressed in V type trichomes and negatively regulated the auxin‐induced formation of V type trichome in the tomato leaves. The regulation of SlARF4 on the formation of II, V and VI type trichomes depended on SlTHM1 and SlMYB52, which directly targeted cyclin geneSlCycB2and increased its expression.
SlMYB52在V型毛状体中特异表达，负调控生长素诱导的番茄叶片V型表皮毛的形成。SlARF4对Ⅱ型、V型和VI型表皮毛形成的调控依赖于SLTHM1和SlMYB52，SLTHM1和SlMYB52直接靶向Cyclin基因SlCycB2并上调其表达。
In conclusion, our >
综上所述，依赖R2R3 MYB的生长素信号通路调控番茄叶片II、V和VI型表皮毛的形成。本研究为提高番茄对朱砂叶螨的抗性提供了一种有效的方法。
论文链接：/10.1111/pbi.13448
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