Roles of nitric oxide in heavy metal stress in plants: Cross-talk with phytohormones and protein S-nitrosylation. (April 2020)

• Record Type: Journal Article
• Authors: Wei, Lijuan; Zhang, Meiling; Wei, Shouhui; Zhang, Jing; Wang, Chunlei; Liao, Weibiao
• Is Part Of: Environmental pollution. Volume 259(2020)
• Publication Date: 2020-04
• Subjects: Heavy metal -- Nitric oxide -- S-nitrosylation -- Phytohormones -- Phytochelatins -- S-nitrosoglutathione reductase; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2020.113943
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Heavy metal (HM) stress is a major hazard, which significantly affects plant growth and development. In order to confront HM stress, plants directly or indirectly regulate the levels of endogenous nitric oxide (NO), a redox-related signaling molecule involved in wide range of plant growth and development as well as in response to HM stress. In addition, there is now compelling experimental evidence that NO usually mediates signaling processes through interactions with different biomolecules like phytohormones to regulate HM tolerance. Apart from phytohormones, NO partly operates through posttranslational modification of proteins, notably via S -nitrosylation in response to HM stress. Recently, the roles of S -nitrosylation as a regulator of plant responses to HM stress and S -nitrosylated candidates have also been established and detected. Here, we describe the roles of NO in confronting HM phytotoxicity in plants with a particular focus on the presentation and discussion of recent data obtained in this field, which involves in the function of various phytohormones and S -nitrosylation during plant responses to HM stress. Additionally, both importance and challenges of future work are outlined in order to further elucidate the specific mechanisms underlying the roles of NO in plant responses to HM stress. Graphical abstract: Image 10228 Highlights: NO regulates the plant tolerance to HM stress through various mechanisms. HM stress induces changes in endogenous NO levels in plants. Proteins S -nitrosylation is involved in HM stress response in plants. Phytohormones may participate in the processes of S -nitrosylation alleviating HM stress.