International journal of molecular sciences, 2022-01, Vol.23 (3), p.1031
2022
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- Autor(en) / Beteiligte
- Titel
- Exogenously-Sourced Ethylene Positively Modulates Photosynthesis, Carbohydrate Metabolism, and Antioxidant Defense to Enhance Heat Tolerance in Rice
- Ist Teil von
- International journal of molecular sciences, 2022-01, Vol.23 (3), p.1031
- Ort / Verlag
- Switzerland: MDPI AG
- Erscheinungsjahr
- 2022
- Quelle
- EZB-FREE-00999 freely available EZB journals
- Beschreibungen/Notizen
- The effect of exogenously-applied ethylene sourced from ethephon (2-chloroethyl phosphonic acid)was studied on photosynthesis, carbohydrate metabolism, and high-temperature stress tolerance in Taipei-309 and Rasi cultivars of rice ( L.). Heat stress increased the content of H O and thiobarbituric acid reactive substances (TBARS)more in Rasi than Taipei-309. Further, a significant decline in sucrose, starch, and carbohydrate metabolism enzyme activity and photosynthesis was also observed in response to heat stress. The application of ethephon reduced H O and TBARS content by enhancing the enzymatic antioxidant defense system and improved carbohydrate metabolism, photosynthesis, and growth more conspicuously in Taipei-309 under heat stress. The ethephon application enhanced photosynthesis by up-regulating the and genes of photosystem II in heat-stressed plants. Interestingly, foliar application of ethephoneffectively down-regulated high-temperature-stress-induced elevated ethylene biosynthesis gene expression. Overall, ethephon application optimized ethylene levels under high-temperature stress to regulate the antioxidant enzymatic system and carbohydrate metabolism, reducing the adverse effects on photosynthesis. These findings suggest that ethylene regulates photosynthesis via carbohydrate metabolism and the antioxidant system, thereby influencing high-temperature stress tolerance in rice.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1422-0067, 1661-6596eISSN: 1422-0067DOI: 10.3390/ijms23031031Titel-ID: cdi_doaj_primary_oai_doaj_org_article_8993297457c8427b8a95f2d897032e6c
- Format
- –
- Schlagworte
- Agricultural production, antioxidant, Antioxidants, Antioxidants - metabolism, Biosynthesis, carbohydrate, Carbohydrate metabolism, Carbohydrate Metabolism - drug effects, Carbohydrates, Carbon, Climate change, Cultivars, Enzymatic activity, Enzyme activity, Enzymes, ethephon, Ethylene, Ethylenes - chemistry, Foliar applications, Food security, Gene expression, Gene Expression Regulation, Plant - drug effects, Heat, Heat stress, Heat tolerance, High temperature, high-temperature stress, Hydrogen peroxide, Hydrogen Peroxide - metabolism, Metabolism, Organophosphorus Compounds - chemistry, Organophosphorus Compounds - pharmacology, Oryza - drug effects, Oryza - genetics, Oryza - growth & development, Oryza - metabolism, Oryza sativa, Oxidative stress, Oxidative Stress - drug effects, Phosphonic acids, Photosynthesis, Photosynthesis - drug effects, Photosystem II, Photosystem II Protein Complex - genetics, Physiology, Plant growth, Plant Proteins - genetics, Rice, Sucrose, Sulfur content, Temperature tolerance, Thermotolerance, Thiobarbiturates - metabolism, Thiobarbituric acid