Exogenous hydrogen sulfide alleviates chromium toxicity by modulating chromium, nutrients and reactive oxygen species accumulation, and antioxidant defence system in mungbean (Vigna radiata L.) seedlings

Singh, Devraj; Sharma, Nathi Lal; Singh, Dharmendra; Siddiqui, Manzer H.; Sarkar, Susheel Kumar; Rathore, Abhishek; Singh, Chandan Kumar; Amri, Abdullah Al; Alansi, Saleh; Ali, Hayssam M.; Rahman, Atikur

doi:10.1016/j.plaphy.2023.107767

Cited by 26 publications

(5 citation statements)

References 97 publications

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“…This is consistence with the increased ROS content induced by CS, and further, it declined due to the supplementation of Si under CS. The SOD activity is involved in O 2 •− dismutation and is considered a first-line defense against multiple abiotic stimuli in plants [3,5,39]. In our investigation, we noticed that increased activity of SOD, CAT, and APX in response to Si-supplementation helps to enhance cold stress tolerance in alfalfa.…”

Section: Si-enhanced Ros Scavenging Activitymentioning

confidence: 60%

“…The solution absorbance was read at 475 nm. The catalase (CAT) activity was determined according to the protocol used earlier [3]. To measure CAT activity a solution mixture containing 0.1 M KPB with 6% H 2 O 2 and 100 μL plant samples.…”

Section: Measurement Of Antioxidant Enzyme Activitymentioning

confidence: 99%

“…Mineral nutrition-mediated abiotic stress alleviation in plants is one of the promising approaches [3,4]. Silicon (Si) is a beneficial element that efficiently mitigates multiple abiotic stresses and improves growth in plants [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Mechanistic Basis of Silicon Mediated Cold Stress Tolerance in Alfalfa (Medicago sativa L.)

Rahman,

Song,

Hasan

et al. 2023

Silicon

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Cold stress (CS) impact on crops is one of the critical constraints for sustainable and smart agricultural production. CS adversely affects plants leading to growth retardation, necrosis, chlorosis, and significant yield loss. The objective of this study was to explore the mechanistic basis of silicon (Si) in enhancing CS tolerance in alfalfa plants. The fluorescence staining indicated that Si-reduced the intensity of CS-induced superoxide radical (O2•–) and hydrogen peroxide (H2O2) generation in plants that improved plant photosynthesis, cellular integrity, and alfalfa biomass production under CS. The exogenous supplementation of Si significantly restored the endogenous Si status accompanied by the upregulation of NIP (nodulin 26-like intrinsic protein) genes NIP2, NIP5;1, and NIP6;1 in alfalfa. The elemental concentration analysis revealed that exogenous silicon (E-Si) triggers the increase of calcium (Ca), magnesium (Mg), and sulfur (S) in plants subjected to Si-supplementation compared to the plants cultivated without Si under CS. The application of Si significantly increased the activity of antioxidant enzymes including superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR). Furthermore, Si significantly enhanced the expression of CS-responsive candidate genes including ICE1, CBF1/DREB1C, CBF2/DREB1B, CBF3/DREB1A, COR15A, COR47, and KIN1 in alfalfa. These findings together provide mechanistic insights into Si-involving CS tolerance in alfalfa. This eco-friendly SC management strategy using Si treatment can be useful to plant breeders and farmers for developing CS-resilient smart alfalfa production through breeding program.

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Section: Si-enhanced Ros Scavenging Activitymentioning

confidence: 60%

Section: Measurement Of Antioxidant Enzyme Activitymentioning

confidence: 99%

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Mechanistic Basis of Silicon Mediated Cold Stress Tolerance in Alfalfa (Medicago sativa L.)

Rahman,

Song,

Hasan

et al. 2023

Silicon

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“…GSH is present in various cell organelles like cytoplasm, ER, chloroplasts, mitochondria, and vacuoles. In these organelles, GSH regulates the levels of its oxidized and reduced forms (GSSG and GSH) and maintains the redox state of the cells, thereby reducing oxidative stress in plant cells (Singh et al, 2023). GSH regulates the synthesis of phytochelatins (peptide compounds), which aid in detoxifying free radicals and help plants cope with oxidative stress.…”

Section: Phytomelatonin Enhances the Defense Compoundsmentioning

confidence: 99%

The role of phytomelatonin in plant homeostasis, signaling, and crosstalk in abiotic stress mitigation

Sati,

Chinchkar,

Kataria

et al. 2024

Physiologia Plantarum

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In recent years, there has been an increase in the study of phytomelatonin. Having numerous functions in animals, melatonin produced by plants (phytomelatonin) is also a multi‐regulatory molecule with great potential in plant physiology and in mitigating abiotic stresses, such as drought, salinity, chilling, heat, chemical contamination, and UV‐radiation stress. This review highlights the primary functions of phytomelatonin as an anti‐stress molecule against abiotic stress. We discuss the role of phytomelatonin as a master regulator, oxidative stress manager, reactive oxygen species and reactive nitrogen species regulator, and defense compounds inducer. Although there exist a handful of reviews on the crosstalk of phytomelatonin with other signaling molecules like auxin, cytokinin, gibberellin, abscisic acid, ethylene, nitric oxide, jasmonic acid, and salicylic acid, this review looks at studies that have reported a few aspects of phytomelatonin with newly discovered signaling molecules along with classical signaling molecules with relation to abiotic stress tolerance. The research and applications of phytomelatonin with hydrogen sulfide, strigolactones, brassinosteroids, and polyamines are still in their nascent stage but hold a promising scope for the future. Additionally, this review states the recent developments in the signaling of phytomelatonin with nitrogen metabolism and nitrosative stress in plants.

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“…While high concentrations of H 2 S can be malodorous and detrimental to plant growth, optimal levels serve as signaling molecules that regulate plant development and response to environmental stress [ 7 ]. In agricultural settings, the careful application of optimal H 2 S concentrations is involved in modulating several physiological processes essential for plant growth and development, including seed germination [ 8 , 9 ], organogenesis [ 10 , 11 ], adventitious and lateral root formation [ 12 , 13 ], maturation, flower senescence [ 14 ], and enhanced tolerance to environmental stress [ 7 , 15 ]. The role of H 2 S as a signaling molecule in orchestrating physiological processes in plants has garnered significant attention recently.…”

Section: Introductionmentioning

confidence: 99%

Metabolomics and transcriptomics combined with physiology reveal key metabolic pathway responses in tobacco roots exposed to NaHS

Yang,

Wen,

Yang

et al. 2024

BMC Plant Biol

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Hydrogen sulfide (H2S) has emerged as a novel endogenous gas signaling molecule, joining the ranks of nitric oxide (NO) and carbon monoxide (CO). Recent research has highlighted its involvement in various physiological processes, such as promoting root organogenesis, regulating stomatal movement and photosynthesis, and enhancing plant growth, development, and stress resistance. Tobacco, a significant cash crop crucial for farmers’ economic income, relies heavily on root development to affect leaf growth, disease resistance, chemical composition, and yield. Despite its importance, there remains a scarcity of studies investigating the role of H2S in promoting tobacco growth. This study exposed tobacco seedlings to different concentrations of NaHS (an exogenous H2S donor) − 0, 200, 400, 600, and 800 mg/L. Results indicated a positive correlation between NaHS concentration and root length, wet weight, root activity, and antioxidant enzymatic activities (CAT, SOD, and POD) in tobacco roots. Transcriptomic and metabolomic analyses revealed that treatment with 600 mg/L NaHS significantly effected 162 key genes, 44 key enzymes, and two metabolic pathways (brassinosteroid synthesis and aspartate biosynthesis) in tobacco seedlings. The addition of exogenous NaHS not only promoted tobacco root development but also potentially reduced pesticide usage, contributing to a more sustainable ecological environment. Overall, this study sheds light on the primary metabolic pathways involved in tobacco root response to NaHS, offering new genetic insights for future investigations into plant root development.

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Exogenous hydrogen sulfide alleviates chromium toxicity by modulating chromium, nutrients and reactive oxygen species accumulation, and antioxidant defence system in mungbean (Vigna radiata L.) seedlings

Cited by 26 publications

References 97 publications

Mechanistic Basis of Silicon Mediated Cold Stress Tolerance in Alfalfa (Medicago sativa L.)

Mechanistic Basis of Silicon Mediated Cold Stress Tolerance in Alfalfa (Medicago sativa L.)

The role of phytomelatonin in plant homeostasis, signaling, and crosstalk in abiotic stress mitigation

Metabolomics and transcriptomics combined with physiology reveal key metabolic pathway responses in tobacco roots exposed to NaHS

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