ARF4 regulates shoot regeneration through coordination with ARF5 and IAA12

ARF4 regulates shoot regeneration through coordination with ARF5 and IAA12
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ARF4 通过与 ARF5 和 IAA12 协调调节芽再生

DOI:
10.1007/s00299-020-02633-w
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发表时间:
2020-11
期刊:
影响因子:
6.2
通讯作者:
Zhi Juan Cheng
Zhi Juan Cheng
中科院分区:
生物学2区
文献类型:
--
作者:
Miao Miao Zhang;Huan Kai Zhang;Jun Feng Zhai;Xian Sheng Zhang;Sang Ya Lin;Zhi Juan Cheng

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关键信息ARF 4通过与ARF 5竞争IAA 12的相互作用来调控茎的再生。这个过程是体外繁殖和基因工程的基础,并为研究基本的生物学问题,如激素信号提供了一个系统。生长素反应因子(ARF)家族转录因子是生长素信号转导途径中的重要组成部分,参与调控靶基因的转录。迄今为止,作为转录抑制因子的B类ARF的功能机制仍不清楚。在这项研究中,我们发现,ARF 4,转录抑制因子,参与调控芽再生。ARF 4与生长素/吲哚-3-乙酸12(IAA 12)相互作用。在茎分生组织形成过程中,ARF 4的表达信号表现出与ARF 5和IAA 12相似的动态模式。IAA 12的表达增强会降低不定芽再生能力。ARF 4的诱导表达补充了IAA 12过表达的再生表型,但没有挽救arf 5突变体mp-S319的缺陷。进一步的分析显示,ARF 4与ARF 5竞争与IAA 12的相互作用。结果表明,ARF 4通过与ARF 5和IAA 12协同作用调控不定芽再生。我们的发现为阐明B类ARF的功能提供了新的信息。
Key messageARF4-regulated shoot regeneration through competing with ARF5 for the interaction with IAA12.AbstractPlant possess the ability to regenerate shoot meristem and subsequent the whole individual. This process is the foundation for in vitro propagation and genetic engineering and provides a system for studying fundamental biological questions, such as hormonal signaling. Auxin response factor (ARF) family transcription factors are critical components of auxin signaling pathway that regulate the transcription of target genes. To date, the mechanisms underlying the functions of class-B ARFs which act as transcription repressors remains unclear. In this study, we found that ARF4, the transcriptional repressor, was involved in regulating shoot regeneration. ARF4 interacted with auxin/Indole-3-Acetic-Acid12 (IAA12). The expression signals of ARF4 displayed a dynamic pattern similar with those of ARF5 and IAA12 during shoot meristem formation. Enhanced expression ofIAA12compromised the shoot regeneration capacity. Induced expression ofARF4complemented the regeneration phenotype ofIAA12-overexpression but did not rescued the defects in thearf5mutant,mp-S319. Further analysis revealed that ARF4 competed with ARF5 for the interaction with IAA12. The results indicate thatARF4-regulated shoot regeneration through cooperating withARF5andIAA12. Our findings provided new information for deciphering the function of class-B ARFs.
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