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ETHYLENE RESPONSE FACTOR 115 integrates jasmonate and cytokinin signaling machineries to repress adventitious rooting in Arabidopsis.
New Phytologist ( IF 9.4 ) Pub Date : 2020-07-07 , DOI: 10.1111/nph.16794
Abdellah Lakehal 1 , Asma Dob 1 , Zahra Rahneshan 1, 2 , Ondřej Novák 3, 4 , Sacha Escamez 1 , Sanaria Alallaq 1 , Miroslav Strnad 3 , Hannele Tuominen 1 , Catherine Bellini 1, 5
Affiliation  

  • Adventitious root initiation (ARI) is a de novo organogenesis program and a key adaptive trait in plants. Several hormones regulate ARI but the underlying genetic architecture that integrates the hormonal crosstalk governing this process remains largely elusive.
  • In this study, we use genetics, genome editing, transcriptomics, hormone profiling and cell biological approaches to demonstrate a crucial role played by the APETALA2/ETHYLENE RESPONSE FACTOR 115 transcription factor.
  • We demonstrate that ERF115 functions as a repressor of ARI by activating the cytokinin (CK) signaling machinery. We also demonstrate that ERF115 is transcriptionally activated by jasmonate (JA), an oxylipin‐derived phytohormone, which represses ARI in NINJA‐dependent and independent manners. Our data indicate that NINJA‐dependent JA signaling in pericycle cells blocks early events of ARI.
  • Altogether, our results reveal a previously unreported molecular network involving cooperative crosstalk between JA and CK machineries that represses ARI.


中文翻译:

乙烯响应因子115整合了茉莉酸酯和细胞分裂素信号传导机制,以抑制拟南芥中的不定根。

  • 不定根启动(ARI)是一种从头开始的器官发生程序,是植物中的关键适应性状。几种激素调节ARI,但整合了控制该过程的激素串扰的潜在遗传结构仍然难以捉摸。
  • 在这项研究中,我们使用遗传学,基因组编辑,转录组学,激素谱和细胞生物学方法来证明APETALA2 / ETHYLENE RESPONSE FACTOR 115转录因子发挥的关键作用。
  • 我们证明ERF115通过激活细胞分裂素(CK)信号传导机制作为ARI的阻遏物。我们还证明了ERF115被茉莉酸酯(JA)转录激活,茉莉是一种由脂蛋白衍生的植物激素,它以NINJA依赖和独立的方式抑制ARI。我们的数据表明,周细胞中依赖NINJA的JA信号传导会阻断ARI的早期事件。
  • 总之,我们的结果揭示了以前未报道的分子网络,其中涉及JA和CK机械之间的协同串扰抑制了ARI。
更新日期:2020-07-07
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