biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 64:512-518, 2020 | DOI: 10.32615/bp.2020.070

Nitric oxide mediated mechanisms adopted by plants to cope with salinity

A. SHARMA1,*, D. KAPOOR2, J. WANG1, M. LANDI3, B. ZHENG1, D. YAN1, H. YUAN1,*
1 State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, P.R. China
2 School of Bioengineering & Biosciences, Lovely Professional University, Punjab 144411, India
3 Department of Agriculture, Food and Environment, University of Pisa, 56124 Pisa, Italy

Worldwide, a relevant surface of arable lands is facing salt stress, and this surface is increasing continuously due to both natural and anthropogenic activities. Nitric oxide (NO) is a small, gaseous molecule with a plethora of physiological roles in plants. In addition to its normal physiological functions, NO protects plants subjected to different environmental cues including salinity. For example, NO mediates photosynthesis and stomatal conductance, stimulates the activity of Na+/H+ antiport in tonoplast, promotes the biosynthesis of osmolytes, and counteracts overaccumulation of reactive oxygen species in plant cells under salt stress. Exogenous NO is also beneficial for plants subjected to salinity, in which it increases salinity tolerance via growth promotion, reversing oxidative damage, and maintaining ion homeostasis. This review provides a comprehensive picture of the NO-mediated mechanisms in plants, resulting in salinity tolerance with a particular focus on the photosynthetic processes, the antioxidant patterns as well as the cross-talk with other regulatory compounds in plant cells.

Keywords: abiotic stresses, antioxidant systems, osmolytes, photosynthesis, stomatal conductance.

Received: February 25, 2020; Revised: April 20, 2020; Accepted: May 11, 2020; Published online: July 16, 2020  Show citation

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SHARMA, A., KAPOOR, D., WANG, J., LANDI, M., ZHENG, B., YAN, D., & YUAN, H. (2020). Nitric oxide mediated mechanisms adopted by plants to cope with salinity. Biologia plantarum, 64, Article 512-518. https://doi.org/10.32615/bp.2020.070
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