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Nitric oxide regulates photosynthetic performance and stomatal behaviour supplemented with nitrogen and sulfur in mustard under salt stress.

07:00 EST 3rd December 2019 | BioPortfolio

Summary of "Nitric oxide regulates photosynthetic performance and stomatal behaviour supplemented with nitrogen and sulfur in mustard under salt stress."

Nitric oxide (NO) is a hormone that connects numerous reactions in plant cells under normal and environmental stress conditions. We found that application of 100 μM NO as sodium nitroprusside (SNP; NO donor) was studied individually or in combination of 100 mg N or 100 mg S applied in different combinations i.e., 100 mg N or S kg soil applied at the time of sowing [100N+100S] or with split, 50 mg N or S kg soil at the time of sowing and similar dose at 20 d after sowing [50N+50S] +[50N+50S] on alleviation of 100 mM NaCl stress in mustard (Brassica juncea L.). Application of 100 μM NO plus split application of N and S more significantly promoted stomatal behavior, photosynthetic and growth performance in the absence of salt stress and maximally alleviated effects of salt stress through increased N- and S-use efficiency, proline and antioxidant system. The combined application of N and S at the time of sowing was lesser effective in promoting photosynthesis and growth under salt or no salt stress conditions in presence or absence of NO. The study suggests that salt stress effects on photosynthetic performance of plants are mitigated more efficiently when NO was applied in the split application of N and S given at two stages, and the photosynthetic activity was promoted under salt stress through increased N and S assimilation and antioxidant system. The strategy may be adopted in agricultural system for overcoming salt stress effects on performance of mustard. This article is protected by copyright. All rights reserved.

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This article was published in the following journal.

Name: Physiologia plantarum
ISSN: 1399-3054
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Medical and Biotech [MESH] Definitions

A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.

An NADPH-dependent enzyme that catalyzes the conversion of L-ARGININE and OXYGEN to produce CITRULLINE and NITRIC OXIDE.

A CALCIUM-dependent, constitutively-expressed form of nitric oxide synthase found primarily in NERVE TISSUE.

A CALCIUM-dependent, constitutively-expressed form of nitric oxide synthase found primarily in ENDOTHELIAL CELLS.

A CALCIUM-independent subtype of nitric oxide synthase that may play a role in immune function. It is an inducible enzyme whose expression is transcriptionally regulated by a variety of CYTOKINES.

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