Nitric oxide signaling and its crosstalk with other plant growth regulators in plant responses to abiotic stress

Abstract

Nitric oxide (NO) is a free radical molecule involved in an array of functions under physiological and adverse environmental conditions. As other free radical molecules, NO biological action depends on its cellular concentration, acting as a signal molecule when produced at low concentration or resulting in cellular damage when produced at sufficiently high levels to trigger nitro-oxidative stress. Over the last decade, significant progress has been made in characterizing NO metabolism and action mechanism, revealing that diverse biosynthetic routes can generate this free radical in plants and its action mainly occurs through posttranslational modification (nitration and S-nitrosylation) of target proteins. Intricate crosstalk networks between NO and other signaling molecules have been described involving phytohormones, other second messengers, and key transcription factors. This review will focus on our current understanding of NO interplay with phytohormones and other plant growth regulators under abiotic stress conditions.

Regulation of the biosynthesis of endogenous nitric oxide and abscisic acid in stored peaches by exogenous nitric oxide and abscisic acid

“…NO is critical for the acclimation of plants under ambient pressure conditions, and the NR and NOS-like pathways are the likely sources of endogenous NO in plants. 34,35 This study showed that exogenous NO maintained a relatively high content of NO ( Fig. 1 (A)), upregulated the NR activity, but inhibited the activity of NOSlike (Fig.…”

Interactive effects of abscisic acid and nitric oxide on chilling resistance and active oxygen metabolism in peach fruit during cold storage

“…In plant tissues, NO may react with thiol proteins, resulting in the formation of S ‐nitrosothiols. S ‐Nitrosothiols is considered as intracellular antioxidant glutathione, which may react with NO, resulting in the formation of S ‐nitrosoglutathione . Indeed, increasing evidence confirms that the intracellular redox state plays a crucial role in the ability of plants to overcome biotic and abiotic stresses.…”

“…S-Nitrosothiols is considered as intracellular antioxidant glutathione, which may react with NO, resulting in the formation of S-nitrosoglutathione. 51,52 Indeed, increasing evidence confirms that the intracellular redox state plays a crucial role in the ability of plants to overcome biotic and abiotic stresses. Maintaining a high level of reduction power is essential for plants to quench excess ROS.…”

Treatment of nitric oxide supplemented with nitrogen and sulfur regulates photosynthetic performance and stomatal behavior in mustard under salt stress

“…These are the chemical messengers that interrelate with nutrients synergistically or antagonistically and play an imperative role for modulating the physiological responses that lead to salt tolerance (Fatma et al ). Particularly, nitric oxide (NO) has emerged as an ubiquitous important free radical gaseous signaling molecule involved in plant development, various physiological functions and nutrient assimilatory processes and has also been reported to improve plant tolerance to environmental stresses including salt stress, toxic metals, low and high temperature, ultraviolet (UV)‐B, ozone, excess light and various pathogens (Fatma et al , Asgher et al , Per et al , Hasanuzzaman et al , Kaya et al , ). NO plays a pivotal role in alleviating the oxidative damage and improves the antioxidant defense machinery in several salt‐affected plant species (Guo et al , Hasanuzzaman et al , Ahmad et al , , Sehar et al ).…”