Journal
ENVIRONMENTAL POLLUTION
Volume 259, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2020.113943
Keywords
Heavy metal; Nitric oxide; S-nitrosylation; Phytohormones; Phytochelatins; S-nitrosoglutathione reductase
Categories
Funding
- National Key Research and Development Program [2018YFD1000800]
- National Natural Science Foundation of China [31860568, 31560563, 31160398]
- Research Fund of Higher Education of Gansu, China [2018C-14]
- Post-Doctoral Foundation of China [20100470887, 2012T50828]
- Natural Science Foundation of Gansu Province, China [1606RJZA073, 1606RJZA077]
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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 post-translational 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. (C) 2020 Elsevier Ltd. All rights reserved.
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