Insights Into the Nitric Oxide Mediated Stress Tolerance in Plants

Plants often face a variety of abiotic stresses, which affects them negatively and lead to yield loss. The antioxidant system efficiently removes excessive reactive oxygen species and maintains redox homeostasis in plants. With better understanding of these protective mechanisms, recently the concept of hydrogen sulfide (H2S) and its role in cell signaling has become the center of attention. H2S has been recognized as a third gasotransmitter and a potent regulator of growth and development processes such as germination, maturation, senescence and defense mechanism in plants. Because of its gaseous nature, H2S can diffuse to different part of the cells and balance the antioxidant pools by supplying sulfur to cells. H2S showed tolerance against a plethora of adverse environmental conditions like drought, salt, high temperature, cold, heavy metals and flood via changing in level of osmolytes, malonaldialdehyde, Na+/K+ uptake, activities of H2S biosynthesis and antioxidative enzymes. It also promotes cross adaptation through persulfidation. H2S along with calcium, methylglyoxal and nitric oxide, and their cross talk induces the expression of mitogen activated protein kinases as well as other genes in response to stress. Therefore, it is sensible to evaluate and explore the stress responsive genes involved in H2S regulated homeostasis and stress tolerance. The current article is aimed to summarize the recent updates on H2S‐mediated gene regulation in special reference to abiotic stress tolerance mechanism, and cross adaptation in plants. Moreover, new insights into the H2S‐associated signal transduction pathway have also been explored.

show abstract

“…Interestingly, addition of NaHS alleviated the damaging effects of heavy metals including Cd, Cr, Cu, Zn etc. (Santisree et al ).…”

Section: Heavy Metal Responsive Genes Regulated By H2smentioning

confidence: 99%

Stress responsive gene regulation in relation to hydrogen sulfide in plants under abiotic stress

Pandey

Gautam

2020

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…In particular, nitric oxide (NO), a versatile signaling molecule has been found to play critical roles in plant defense reactions including induction of antioxidant potential under various plant abiotic stresses [ 26 , 27 ]. Adequate evidence substantiates a wide range of roles of NO in plant physiological processes including germination, photosynthesis, and defense mechanism both under normal and environmental stresses [ 28 , 29 ]. In plants, the cell-protective role of NO has been tested with DNA, proteins, lipids, and chlorophyll [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Nitric Oxide Pre-Treatment Advances Seed Germination and Alleviates Copper-Induced Photosynthetic Inhibition in Indian Mustard

Rather

Mir

Masood

et al. 2020

Plants

View full text Add to dashboard Cite

This investigation tested the efficiency of nitric oxide (NO) in alleviation of Cu-induced adverse impacts on seed germination and photosynthesis in Indian mustard (Brassica juncea L.). Pre-treatment of B. juncea seeds with sodium nitroprusside (SNP; NO donor) significantly improved the seed germination rate and also alleviated Cu-accrued oxidative stress. However, in the absence of NO, Cu caused a higher reduction in seed germination rate. The presence of NO strengthened the antioxidant defense system (glutathione reductase, ascorbate peroxidase, and superoxide dismutase) and thereby sustained the lower lipid peroxidation, reduced H2O2 content, and thiobarbituric acid reactive substances in Cu-exposed seeds. NO pre-treated seeds also retained a higher amylase activity and exhibited an improved seed germination rate. This effect of NO under Cu stress was also seen in plants originated from the NO pre-treated seeds, where the role of NO pre-treatment was reflected in the improved photosynthetic potential of B. juncea. Overall, NO pre-treatment not only improved the germination rate in seeds but also carried its effects in the grown seedlings evidenced as improved photosynthesis and growth. Potential mechanisms involved in the action of NO pre-treatment included NO-mediated significant strengthening of the antioxidant defense system and decreases in Cu-caused oxidative stress parameters.

show abstract

“…As a key signaling component, NO is involved in various physiological and metabolic processes in plants including their adaptation to various stresses (Asgher et al, 2017;Fancy et al, 2017;Santisree et al, 2019). In plants, NO is synthesized both by enzymatic and non-enzymatic systems (Arasimowicz and Floryszak-Wieczorek, 2007;Hasanuzzaman et al, 2018) (Figure 1).…”

Section: No As a Major Plant Signaling Moleculementioning

confidence: 99%

“…as seed germination, senescence, root growth, leaf expansion, photo-morphogenesis, floral regulation, photosynthesis, root organogenesis, hypocotyl growth, and pathogen defense (Asgher et al, 2017;Corpas and Palma, 2018;Santisree et al, 2019), stomatal closure and the cytokinin signaling pathway (Tun et al, 2001;Desikan et al, 2004;Shi et al, 2015). Contingent to its concentration and the site of formation NO induces both positive and negative effects on plant metabolic processes.…”

Section: No In Plant Growth and Developmentmentioning

confidence: 99%

“…NO controls overall plant growth and the developmental processes starting from germination to senescence (Hu et al, 2007;Corpas and Barroso, 2015b). In particular, recent studies have shown that both production and signaling of NO are involved in the stress-acclimation processes in plants (Khan et al, 2012;Asgher et al, 2017;Kushwaha et al, 2019;Santisree et al, 2019). However, literature available in context with NO and plants is centered mainly on NO synthesis and its multitasking signaling in plants (Domingos et al, 2015;Astier et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanisms and Role of Nitric Oxide in Phytotoxicity-Mitigation of Copper

et al. 2020

View full text Add to dashboard Cite

Phytotoxicity of metals significantly contributes to the major loss in agricultural productivity. Among all the metals, copper (Cu) is one of essential metals, where it exhibits toxicity only at its supra-optimal level. Elevated Cu levels affect plants developmental processes from initiation of seed germination to the senescence, photosynthetic functions, growth and productivity. The use of plant growth regulators/phytohormones and other signaling molecules is one of major approaches for reversing Cu-toxicity in plants. Nitric oxide (NO) is a versatile and bioactive gaseous signaling molecule, involved in major physiological and molecular processes in plants. NO modulates responses of plants grown under optimal conditions or to multiple stress factors including elevated Cu levels. The available literature in this context is centered mainly on the role of NO in combating Cu stress with partial discussion on underlying mechanisms. Considering the recent reports, this paper: (a) overviews Cu uptake and transport; (b) highlights the major aspects of Cu-toxicity on germination, photosynthesis, growth, phenotypic changes and nutrient-use-efficiency; (c) updates on NO as a major signaling molecule; and (d) critically appraises the Cu-significance and mechanisms underlying NO-mediated alleviation of Cu-phytotoxicity. The outcome of the discussion may provide important clues for future research on NO-mediated mitigation of Cu-phytotoxicity.

show abstract

Insights Into the Nitric Oxide Mediated Stress Tolerance in Plants

Cited by 10 publications

References 205 publications

Stress responsive gene regulation in relation to hydrogen sulfide in plants under abiotic stress

Stress responsive gene regulation in relation to hydrogen sulfide in plants under abiotic stress

Nitric Oxide Pre-Treatment Advances Seed Germination and Alleviates Copper-Induced Photosynthetic Inhibition in Indian Mustard

Mechanisms and Role of Nitric Oxide in Phytotoxicity-Mitigation of Copper

Contact Info

Product

Resources

About