PagJAZ5 通过协调调节杨树细胞分裂素的浓度和信号传导来调节韧皮部活性。

IF 8.1 1区 生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2024-06-14 DOI:10.1111/nph.19912
Meng-Xuan Hu, Wei Guo, Xue-Qin Song, Ying-Li Liu, Yuan Xue, Yuan Cao, Jian-Jun Hu, Meng-Zhu Lu, Shu-Tang Zhao
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引用次数: 0

摘要

木材是由木本植物的维管束壁细胞分裂和分化形成的径向生长，而植物激素在壁细胞活动中发挥着重要作用。在这里，我们发现 PagJAZ5 是茉莉酸盐（JA）信号传导的一个关键负调控因子，它通过介导细胞分裂素信号传导在杨树 84K（Populus alba × Populus glandulosa）中对增强韧皮部细胞分裂和分化起着重要作用。PagJAZ5 优先在发育中的韧皮部和骨皮层中表达，在发育中的木质部细胞中表达较弱。PagJAZ5m（对 JA 不敏感）的过表达（OE）增加了木质部的活性和木质部的分化，而 jaz 突变体则表现出相反的结果。转录组分析表明，细胞分裂素氧化酶/脱氢酶（CKXs）和 A 型响应调节因子（RRs）在 PagJAZ5m OE 植物中下调。与84K植株相比，PagJAZ5m过表达植株的生物活性细胞分裂素显著增加，而jaz5突变体的生物活性细胞分裂素显著减少。PagJAZ5与PagMYC2a/b和PagWOX4b直接相互作用。此外，我们还发现 PagRR5 受 PagMYC2a 和 PagWOX4b 的调控，参与木质部发育的调控。我们的研究结果表明，PagJAZ5 能在杨树木质部形成过程中通过调节细胞分裂素水平和 A 型 RR 增加木质部活性并促进木质部分化。
本文章由计算机程序翻译，如有差异，请以英文原文为准。

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PagJAZ5 regulates cambium activity through coordinately modulating cytokinin concentration and signaling in poplar

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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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