SHOOT GRAVITROPISM 5 mediates the stomatal response to darkness in Arabidopsis.

IF 1.4 4区生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Plant Biotechnology Pub Date : 2024-03-25 DOI:10.5511/plantbiotechnology.23.1122a

Moeca Arai, Keiko Kigoshi, Kosuke Moriwaki, Kyoko Miyashita, Yoshimi Nakano, Sumire Fujiwara

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Abstract

Stomatal regulation, a multifaceted mechanism enabling plants to adapt to diverse environmental conditions and optimize photosynthesis for survival and growth, is considered crucial in drought stress tolerance research. To further enhance our understanding of stomatal regulation, we investigated the novel transcription factors involved in this process. Our findings reveal that SHOOT GRAVITROPISM 5 (SGR5) is involved in the stomatal response to darkness in Arabidopsis. Water loss measurements showed that SGR5-overexpressing plants retained more water, whereas SGR5-knockout lines exhibited increased water loss compared with the control. Unexpectedly, our analyses indicated that SGR5 was not associated with the abscisic acid signaling pathway, in contrast to its homologous transcription factor, INDETERMINATE DOMAIN 14. Instead, SGR5-knockout lines exhibited weakened stomatal closure responses upon transition to darkness. Collectively, our results highlight the regulatory role of SGR5 in mediating stomatal movement in response to darkness.

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拟南芥的 SHOOT GRAVITROPISM 5 介导了气孔对黑暗的反应。

气孔调控是植物适应不同环境条件并优化光合作用以促进生存和生长的一种多方面机制，在干旱胁迫耐受性研究中被认为是至关重要的。为了进一步加深对气孔调控的理解，我们研究了参与这一过程的新型转录因子。我们的研究结果表明，SHOOT GRAVITROPISM 5（SGR5）参与了拟南芥气孔对黑暗的反应。失水测量结果表明，与对照相比，SGR5基因缺失的植株保留了更多的水分，而SGR5基因敲除株系的失水则有所增加。意想不到的是，我们的分析表明，与同源转录因子 INDETERMINATE DOMAIN 14 不同，SGR5 与脱落酸信号途径无关。相反，SGR5 基因敲除株系在过渡到黑暗环境时表现出较弱的气孔关闭反应。总之，我们的研究结果突显了 SGR5 在介导气孔运动以应对黑暗条件中的调控作用。

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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来源期刊

Plant Biotechnology BIOTECHNOLOGY & APPLIED MICROBIOLOGY-PLANT SCIENCES

CiteScore

2.90

自引率

18.80%

发文量

审稿时长

6-12 weeks

期刊介绍： Plant Biotechnology is an international, open-access, and online journal, published every three months by the Japanese Society for Plant Biotechnology. The journal, first published in 1984 as the predecessor journal, “Plant Tissue Culture Letters” and became its present form in 1997 when the society name was renamed to Japanese Society for Plant Cell and Molecular Biology, publishes findings in the areas from basic- to application research of plant biotechnology. The aim of Plant Biotechnology is to publish original and high-impact papers, in the most rapid turnaround time for reviewing, on the plant biotechnology including tissue culture, production of specialized metabolites, transgenic technology, and genome editing technology, and also on the related research fields including molecular biology, cell biology, genetics, plant breeding, plant physiology and biochemistry, metabolic engineering, synthetic biology, and bioinformatics.