拟南芥光感受器与BR信号的相互作用

IF 0.5 4区生物学 Q4 PLANT SCIENCES

Acta Biologica Cracoviensia Series Botanica Pub Date : 2015-03-01 DOI:10.2478/ABCSB-2014-0027

Z. Zhu, X. Zhu, Y. Zhu, D. Yao, Y. Xuan

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引用次数: 1

摘要

油菜素内酯(BRs)是一类重要的生理激素，在植物生长、发育和光形态形成过程中起着重要的作用。光感受器识别不同波长的光在植物发育中起着至关重要的作用。不同的光感受器在BR信号传导中的作用尚未被分析。本研究采用光感受器单突变体、双突变体甚至四突变体来分析br依赖性下胚轴生长和基因调控。所有光感受器突变体对BR的反应均不同于对照，应用BR生物合成抑制剂丙环唑(PCZ)抑制了下胚轴伸长和BR标记基因的调控。此外，油菜素内酯不敏感突变体bri1-5和油菜素唑抗性突变体bzr1-D的光敏色素和隐色素表达改变表明BR在转录水平上负调控光感受器。这是首次研究拟南芥中BR与光感受器之间的联系。

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Interaction Between Photoreceptors and BR Signaling in Arabidopsis

Extensive studies have been performed to elucidate the role of brassinosteroids (BRs), an important class of phy- tohormone in plant growth, development, and photomorphogenesis. Different wavelengths of light recognized by photoreceptors play a crucial role in plant development. The role of different photoreceptors in BR signaling has not been analyzed. Here we used photoreceptor single mutants, double mutants and even a quadruple mutant to analyze BR-dependent hypocotyl growth and gene regulation. All the photoreceptor mutants differed from the controls in their response to BR, and hypocotyl elongation as well as BR marker gene regulation were inhibited by application of propiconazole (PCZ), a BR biosynthesis inhibitor. In addition, altered Phytochrome and Cryptochrome expression in brassinosteroid insensitive 1 mutant bri1-5 and brassinazole-resistant 1 dominant mutant bzr1-D indicated that BR negatively regulates photoreceptors in transcriptional levels. This is the first study to investigate the connections between BR and photoreceptors in Arabidopsis .

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来源期刊

Acta Biologica Cracoviensia Series Botanica 生物-植物科学

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： ACTA BIOLOGICA CRACOVIENSIA Series Botanica is an English-language journal founded in 1958, devoted to plant anatomy and morphology, cytology, genetics, embryology, tissue culture, physiology, biochemistry, biosystematics, molecular phylogenetics and phylogeography, as well as phytochemistry. It is published twice a year.