Nitric oxide in plants: an insight on redox activity and responses toward abiotic stress signaling.

Plant signaling & behavior Pub Date : 2024-12-31 Epub Date: 2024-01-08 DOI:10.1080/15592324.2023.2298053
Khushboo Khator, Suman Parihar, Jan Jasik, Gyan Singh Shekhawat
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Abstract

Plants, as sessile organisms, are subjected to diverse abiotic stresses, including salinity, desiccation, metal toxicity, thermal fluctuations, and hypoxia at different phases of plant growth. Plants can activate messenger molecules to initiate a signaling cascade of response toward environmental stresses that results in either cell death or plant acclimation. Nitric oxide (NO) is a small gaseous redox-active molecule that exhibits a plethora of physiological functions in growth, development, flowering, senescence, stomata closure and responses to environmental stresses. It can also facilitate alteration in protein function and reprogram the gene profiling by direct or indirect interaction with different target molecules. The bioactivity of NO can be manifested through different redox-based protein modifications including S-nitrosylation, protein nitration, and metal nitrosylation in plants. Although there has been considerable progress in the role of NO in regulating stress signaling, still the physiological mechanisms regarding the abiotic stress tolerance in plants remain unclear. This review summarizes recent advances in understanding the emerging knowledge regarding NO function in plant tolerance against abiotic stresses. The manuscript also highlighted the importance of NO as an abiotic stress modulator and developed a rational design for crop cultivation under a stress environment.

植物中的一氧化氮:对氧化还原活动和非生物胁迫信号反应的认识。
植物作为无梗生物,在其生长的不同阶段会受到各种非生物胁迫,包括盐度、干燥、金属毒性、热波动和缺氧。植物可以激活信使分子,启动信号级联反应,以应对环境胁迫,从而导致细胞死亡或植物适应环境。一氧化氮(NO)是一种具有氧化还原作用的气态小分子,在生长、发育、开花、衰老、气孔关闭和对环境胁迫的反应中具有多种生理功能。它还能通过与不同靶分子的直接或间接相互作用,促进蛋白质功能的改变和基因谱的重编程。氮氧化物的生物活性可通过不同的氧化还原型蛋白质修饰来体现,包括植物体内的 S-亚硝基化、蛋白质硝化和金属亚硝基化。尽管在氮氧化物调节胁迫信号转导的作用方面取得了很大进展,但植物耐受非生物胁迫的生理机制仍不清楚。这篇综述总结了在了解有关 NO 在植物耐受非生物胁迫中的功能的新知识方面的最新进展。稿件还强调了 NO 作为一种非生物胁迫调节剂的重要性,并对胁迫环境下的作物栽培进行了合理设计。
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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