Phytohormones and Nitric Oxide Cross‐talk in Regulation of Stress Tolerance in Plants

Dutta, Debjani; Mondal, Sananda; Karmakar, Snehashis

doi:10.1002/9781119800156.ch9

Cited by 2 publications

(2 citation statements)

References 139 publications

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“…The plant response to abiotic stress involves cross-talk and interactions with various molecular pathways [ 140 ]. However, the responses to these abiotic conditions are dynamic and complex, and they can be reversible or irreversible [ 141 , 142 ]. Phytohormones play a critical role in regulating physiological processes and plant responses to abiotic stress.…”

Section: Defence Action Through Secondary Metabolism In Plantsmentioning

confidence: 99%

From Nature to Lab: A Review of Secondary Metabolite Biosynthetic Pathways, Environmental Influences, and In Vitro Approaches

Reshi,

Ahmad,

Lukatkin

et al. 2023

Metabolites

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Secondary metabolites are gaining an increasing importance in various industries, such as pharmaceuticals, dyes, and food, as is the need for reliable and efficient methods of procuring these compounds. To develop sustainable and cost-effective approaches, a comprehensive understanding of the biosynthetic pathways and the factors influencing secondary metabolite production is essential. These compounds are a unique type of natural product which recognizes the oxidative damage caused by stresses, thereby activating the defence mechanism in plants. Various methods have been developed to enhance the production of secondary metabolites in plants. The elicitor-induced in vitro culture technique is considered an efficient tool for studying and improving the production of secondary metabolites in plants. In the present review, we have documented various biosynthetic pathways and the role of secondary metabolites under diverse environmental stresses. Furthermore, a practical strategy for obtaining consistent and abundant secondary metabolite production via various elicitation agents used in culturing techniques is also mentioned. By elucidating the intricate interplay of regulatory factors, this review paves the way for future advancements in sustainable and efficient production methods for high-value secondary metabolites.

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Section: Defence Action Through Secondary Metabolism In Plantsmentioning

confidence: 99%

From Nature to Lab: A Review of Secondary Metabolite Biosynthetic Pathways, Environmental Influences, and In Vitro Approaches

Reshi,

Ahmad,

Lukatkin

et al. 2023

Metabolites

View full text Add to dashboard Cite

show abstract

“…The enzyme NR is responsible for the generation of NO in plants under stressful environmental conditions [ 31 , 32 ]. NO is a signal molecule with a constructive function in seed germination [ 33 ], adventitious rooting [ 34 ], phytohormone homeostasis and perception [ 35 ], and fruit ripening [ 36 ], as well as a regulating role in the defense systems of plants under several stresses including arsenic stress [ 37 ], cadmium stress [ 38 ], salinity stress [ 39 ], and drought stress [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

5-Aminolevulinic Acid Induces Chromium [Cr(VI)] Tolerance in Tomatoes by Alleviating Oxidative Damage and Protecting Photosystem II: A Mechanistic Approach

Kaya

Uğurlar

Ashraf

et al. 2023

Plants

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Chromium [Cr(VI)] pollution is a major environmental risk, reducing crop yields. 5-Aminolevunic acid (5-ALA) considerably improves plant abiotic stress tolerance by inducing hydrogen peroxide (H2O2) and nitric oxide (NO) signalling. Our investigation aimed to uncover the mechanism of tomato tolerance to Cr(VI) toxicity through the foliar application of 5-ALA for three days, fifteen days before Cr treatment. Chromium alone decreased plant biomass and photosynthetic pigments, but increased oxidative stress markers, i.e., H2O2 and lipid peroxidation (as MDA equivalent). Electrolyte leakage (EL), NO, nitrate reductase (NR), phytochelatins (PCs), glutathione (GSH), and enzymatic and non-enzymatic antioxidants were also increased. Foliar application of 5-ALA before Cr treatment improved plant growth and photosynthetic pigments, diminished H2O2, MDA content, and EL, and resulted in additional enhancements of enzymatic and non-enzymatic antioxidants, NR activity, and NO synthesis. In Cr-treated tomato seedlings, 5-ALA enhanced GSH and PCs, which modulated Cr sequestration to make it nontoxic. 5-ALA-induced Cr tolerance was further enhanced by sodium nitroprusside (SNP), a NO donor. When sodium tungstate (ST), a NR inhibitor, was supplied together with 5-ALA to Cr-treated plants, it eliminated the beneficial effects of 5-ALA by decreasing NR activity and NO synthesis, while the addition of SNP inverted the adverse effects of ST. We conclude that the mechanism by which 5-ALA induced Cr tolerance in tomato seedlings is mediated by NR-generated NO. Thus, NR and NO are twin players, reducing Cr toxicity in tomato plants via antioxidant signalling cascades.

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Phytohormones and Nitric Oxide Cross‐talk in Regulation of Stress Tolerance in Plants

Cited by 2 publications

References 139 publications

From Nature to Lab: A Review of Secondary Metabolite Biosynthetic Pathways, Environmental Influences, and In Vitro Approaches

From Nature to Lab: A Review of Secondary Metabolite Biosynthetic Pathways, Environmental Influences, and In Vitro Approaches

5-Aminolevulinic Acid Induces Chromium [Cr(VI)] Tolerance in Tomatoes by Alleviating Oxidative Damage and Protecting Photosystem II: A Mechanistic Approach

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