Arai Moeca, Kigoshi Keiko, Moriwaki Kosuke, Miyashita Kyoko, Nakano Yoshimi, Fujiwara Sumire
Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan.
Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan.
Plant Biotechnol (Tokyo). 2024 Mar 25;41(1):19-25. doi: 10.5511/plantbiotechnology.23.1122a.
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 () is involved in the stomatal response to darkness in . Water loss measurements showed that -overexpressing plants retained more water, whereas -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, -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.
气孔调节是一种多方面的机制，使植物能够适应各种环境条件，并优化光合作用以实现生存和生长，在干旱胁迫耐受性研究中被认为至关重要。为了进一步加深我们对气孔调节的理解，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，（）参与了[具体植物名称]中气孔对黑暗的反应。水分流失测量表明，过表达[基因名称]的植物保留了更多水分，而敲除[基因名称]的株系与对照相比表现出水分流失增加。出乎意料的是，我们的分析表明，与同源转录因子INDETERMINATE DOMAIN 14不同，SGR5与脱落酸信号通路无关。相反，敲除[基因名称]的株系在转入黑暗时气孔关闭反应减弱。总体而言，我们的结果突出了SGR5在介导气孔对黑暗反应的运动中的调节作用。
