Expanding roles of cross-talk between hydrogen sulfide and nitric oxide under abiotic stress in plants

• Published in: Plant physiology and biochemistry 2024-09, Vol.214, p.108852, Article 108852
• Main Authors: Saini, Neha, Modolo, Luzia V., Deswal, Renu, Sehrawat, Ankita, Yadav, Nisha, Sangwan, Neelam S.
• Format: Article
• Language: English
• Subjects: Hydrogen sulfide; Hydrogen Sulfide - metabolism; Nitric oxide; Nitric Oxide - metabolism; Plant Physiological Phenomena; Plants - metabolism; Post translational modifications; Reactive oxygen species; Stress, Physiological
• ISSN: 0981-9428; 1873-2690; 1873-2690
• DOI: 10.1016/j.plaphy.2024.108852

Abiotic stress such as salt, heavy metals, drought, temperature, and others can affect plants from seed germination to seedling growth to reproductive maturity. Abiotic stress increases reactive oxygen species and lowers antioxidant enzymes in plants resulted the plant tolerance ability against stress conditions decrease. Hydrogen sulfide (H2S) and nitric oxide (NO) are important gasotransmitters involved in seed germination, photosynthesis, growth and development, metabolism, different physiological processes and functions in plants. In plants, various enzymes are responsible for the biosynthesis of both H2S and NO via both enzymatic and non-enzymatic pathways. They also mediate post-translation modification, such as persulfidation, and nitrosylation, which are protective mechanisms against oxidative damage. They also regulate some cellular signalling pathways in response to various abiotic stress. H2S and NO also stimulate biochemical reactions in plants, including cytosolic osmoprotectant accumulation, reactive oxygen species regulation, antioxidant system activation, K+ uptake, and Na+ cell extrusion or vacuolar compartmentation. In this review, we summarize how H2S and NO interact with each other, the function of both H2S and NO, the mechanism of biosynthesis, and post-translational modification under different abiotic stress. Our main emphasis was to find the cross-talk between NO and H2S and how they regulate genes in plants under abiotic stress. [Display omitted] •Abiotic stress adversely impacts the growth and productivity of plants by increasing the ROS levels.•Hydrogen Sulfide (H2S) and Nitric oxide (NO) are endogenously synthesized gasotransmitter in plants.•H2S and NO regulate various genes of signalling pathways during stress conditions and maintain ROS levels.•H2S and NO regulate protein activity by thiol-based modification viz persulfidation and S- nitrosation that compete one another and with other PTMs (S-cyanylation, S- glutathionylation).