The crosstalk of melatonin and hydrogen sulfide determines photosynthetic performance by regulation of carbohydrate metabolism in wheat under heat stress
Noushina Iqbal,Mehar Fatma,Harsha Gautam,Shahid Umar,Adriano Sofo,Ilaria D’Ippolito,Nafees A. Khan +6 more
- Vol. 10, Iss: 9, pp 1778
TLDR
In this paper, the importance of melatonin in reducing heat stress-induced severity in wheat (Triticum aestivum L.) plants was evaluated, and it was shown that melatonin not only reduced oxidative stress through lowering TBARS and H2O2 content, augmenting the activity of antioxidative enzymes but also increased the photosynthesis in plant and carbohydrate metabolism that was needed to provide energy and carbon skeleton to the developing plant under stress.Abstract:
Photosynthesis is a pivotal process that determines the synthesis of carbohydrates required for sustaining growth under normal or stress situation. Stress exposure reduces the photosynthetic potential owing to the excess synthesis of reactive oxygen species that disturb the proper functioning of photosynthetic apparatus. This decreased photosynthesis is associated with disturbances in carbohydrate metabolism resulting in reduced growth under stress. We evaluated the importance of melatonin in reducing heat stress-induced severity in wheat (Triticum aestivum L.) plants. The plants were subjected to 25 °C (optimum temperature) or 40 °C (heat stress) for 15 days at 6 h time duration and then developed the plants for 30 days. Heat stress led to oxidative stress with increased production of thiobarbituric acid reactive substances (TBARS) and hydrogen peroxide (H2O2) content and reduced accrual of total soluble sugars, starch and carbohydrate metabolism enzymes which were reflected in reduced photosynthesis. Application of melatonin not only reduced oxidative stress through lowering TBARS and H2O2 content, augmenting the activity of antioxidative enzymes but also increased the photosynthesis in plant and carbohydrate metabolism that was needed to provide energy and carbon skeleton to the developing plant under stress. However, the increase in these parameters with melatonin was mediated via hydrogen sulfide (H2S), as the inhibition of H2S by hypotaurine (HT; H2S scavenger) reversed the ameliorative effect of melatonin. This suggests a crosstalk of melatonin and H2S in protecting heat stress-induced photosynthetic inhibition via regulation of carbohydrate metabolism.read more
Citations
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Journal ArticleDOI
Melatonin-mediated photosynthetic performance of tomato seedlings under high-temperature stress.
Mohammad Shah Jahan,Shirong Guo,Jin Sun,Sheng Shu,Yu Wang,Ahmed Abou El-Yazied,Nadiyah M. Alabdallah,Mohamed Hikal,Mostafa H.M. Mohamed,Mohamed F. M. Ibrahim,Md. Mahadi Hasan +10 more
TL;DR: In this article, the authors showed that melatonin treatment in tomato seedlings increased the endogenous melatonin levels and photosynthetic pigment content along with upregulated of their biosynthesis gene expression under high-temperature stress, whereas heat stress significantly decreased the values of gas exchange parameters.
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Phytomelatonin: an unexpected molecule with amazing performances in plants
TL;DR: In this article , the effect of melatonin on the secondary metabolism of plants has been investigated, and a clear increase in polyphenol, glucosinolate, terpenoid and alkaloid levels has been described in numerous melatonin-treated plants.
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Melatonin-mediated temperature stress tolerance in plants
Ali Raza,Sidra Charagh,Pedro García-Caparrós,Md. Atikur Rahman,Vincent Happy Ogwugwa,Faisal Iqbal Saeed,Wanmei Jin +6 more
TL;DR: In this paper , the critical role of MET in plant production and tolerance against temperature stress is highlighted, and how MET interacts with other molecules like phytohormones and gaseous molecules to alleviate temperature stress.
Journal ArticleDOI
Melatonin Confers Plant Cadmium Tolerance: An Update.
TL;DR: In this paper, the authors summarized the progress in various physiological and molecular mechanisms regulated by melatonin in plants under Cadmium (Cd) stress and discussed the complex interactions between melatonin and hydrogen sulfide (H2S) in acquisition of Cd stress tolerance.
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Melatonin-Mediated Abiotic Stress Tolerance in Plants
TL;DR: This review focuses on melatonin-mediated tolerance to abiotic stresses including drought, waterlogging, salt, heat, cold, heavy metal toxicity, light and others and also examines exogenous melatonin treatment in plants under abiotic stress.
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