Brassinosteroid-regulated plant growth and development and gene expression in soybean

Brassinosteroid-regulated plant growth and development and gene expression in soybean
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油菜素类固醇调节大豆植物生长发育及基因表达

DOI:
10.1016/j.cj.2018.10.003
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发表时间:
2019-06
期刊:
影响因子:
6.6
通讯作者:
Tong Hongning
Tong Hongning
中科院分区:
农林科学1区
文献类型:
--
作者:
Yin Wenchao;Dong Nana;Niu Mei;Zhang Xiaoxing;Li Lulu;Liu Jun;Liu Bin;Tong Hongning

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类甾醇(BRs)是一类内源性植物激素,在植物生长发育中起着重要的调节作用。在这项研究中,我们评估了油菜素(BL,活性BR之一)对大豆的影响,并确定了激素在调节植物生长发育的多个方面的作用。BL处理在光照条件下促进下胚轴和上胚轴的伸长,但在黑暗条件下抑制上胚轴的伸长。高水平的Castasterone和BL积累在光生长的植物。BL破坏了地上部的负向重力性,而赤霉素则没有。BL延缓叶片衰老。转录组分析表明,BL诱导了细胞壁修饰基因和生长素相关基因的表达,但抑制了一类与衰老和胁迫反应有关的WRKY基因的表达,显示了BR在多种生物学过程中的复杂作用。
Brassinosteroids (BRs) are endogenous phytohormones that play important roles in regulating plant growth and development. In this study, we evaluated the effects of brassinolide (BL, one of the active BRs) on soybean and identified roles of the hormone in regulating multiple aspects of plant growth and development. BL application promoted hypocotyl and epicotyl elongation in the light but blocked epicotyl elongation in the dark. High levels of castasterone and BL accumulated in light-grown plants. BL disrupted shoot negative gravitropism, whereas gibberellin did not. BL delayed leaf senescence. Transcriptome analysis showed that BL induced cell wall-modifying genes and auxin-associated genes but suppressed a class ofWRKYgenes involved in senescence and stress responses, showing the complex roles of BRs in multiple biological processes.
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