Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance
Proline is a proteinogenic amino acid synthesized from glutamate and ornithine. Pyrroline-5-carboxylate synthetase and pyrroline-5-carboxylate reductase are the two key enzymes involved in proline synthesis from glutamate. On the other hand, ornithine-δ-aminotransferase converts ornithine to pyrroli...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Frontiers Media
2022
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| Acceso en línea: | https://hdl.handle.net/10568/126198 |
| _version_ | 1855529058269396992 |
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| author | Kavi Kishor, Polavarapu B. Suravajhala, Prashanth Rathnagiri, P. Sreenivasulu, Nese |
| author_browse | Kavi Kishor, Polavarapu B. Rathnagiri, P. Sreenivasulu, Nese Suravajhala, Prashanth |
| author_facet | Kavi Kishor, Polavarapu B. Suravajhala, Prashanth Rathnagiri, P. Sreenivasulu, Nese |
| author_sort | Kavi Kishor, Polavarapu B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Proline is a proteinogenic amino acid synthesized from glutamate and ornithine. Pyrroline-5-carboxylate synthetase and pyrroline-5-carboxylate reductase are the two key enzymes involved in proline synthesis from glutamate. On the other hand, ornithine-δ-aminotransferase converts ornithine to pyrroline 5-carboxylate (P5C), an intermediate in the synthesis of proline as well as glutamate. Both proline dehydrogenase and P5C dehydrogenase convert proline back to glutamate. Proline accumulation is widespread in response to environmental challenges such as high temperatures, and it is known to defend plants against unpropitious situations promoting plant growth and flowering. While proline accumulation is positively correlated with heat stress tolerance in some crops, it has detrimental consequences in others. Although it has been established that proline is a key osmolyte, its exact physiological function during heat stress and plant ontogeny remains unknown. Emerging evidence pointed out its role as an overriding molecule in alleviating high temperature stress (HTS) by quenching singlet oxygen and superoxide radicals. Proline cycle acts as a shuttle and the redox couple (NAD+/NADH, NADP+/NADPH) appears to be highly crucial for energy transfer among different cellular compartments during plant development, exposure to HTS conditions and also during the recovery of stress. In this review, the progress made in recent years regarding its involvement in heat stress tolerance is highlighted. |
| format | Journal Article |
| id | CGSpace126198 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace1261982025-12-08T10:29:22Z Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance Kavi Kishor, Polavarapu B. Suravajhala, Prashanth Rathnagiri, P. Sreenivasulu, Nese stress protein content reactive oxygen species redox couple Proline is a proteinogenic amino acid synthesized from glutamate and ornithine. Pyrroline-5-carboxylate synthetase and pyrroline-5-carboxylate reductase are the two key enzymes involved in proline synthesis from glutamate. On the other hand, ornithine-δ-aminotransferase converts ornithine to pyrroline 5-carboxylate (P5C), an intermediate in the synthesis of proline as well as glutamate. Both proline dehydrogenase and P5C dehydrogenase convert proline back to glutamate. Proline accumulation is widespread in response to environmental challenges such as high temperatures, and it is known to defend plants against unpropitious situations promoting plant growth and flowering. While proline accumulation is positively correlated with heat stress tolerance in some crops, it has detrimental consequences in others. Although it has been established that proline is a key osmolyte, its exact physiological function during heat stress and plant ontogeny remains unknown. Emerging evidence pointed out its role as an overriding molecule in alleviating high temperature stress (HTS) by quenching singlet oxygen and superoxide radicals. Proline cycle acts as a shuttle and the redox couple (NAD+/NADH, NADP+/NADPH) appears to be highly crucial for energy transfer among different cellular compartments during plant development, exposure to HTS conditions and also during the recovery of stress. In this review, the progress made in recent years regarding its involvement in heat stress tolerance is highlighted. 2022-06-10 2022-12-21T14:26:42Z 2022-12-21T14:26:42Z Journal Article https://hdl.handle.net/10568/126198 en Open Access application/pdf Frontiers Media Kishor, PB Kavi, Prashanth Suravajhala, P. Rathnagiri, and Nese Sreenivasulu. "Intriguing role of proline in redox potential conferring high temperature stress tolerance." Frontiers in Plant Science 13 (2022). |
| spellingShingle | stress protein content reactive oxygen species redox couple Kavi Kishor, Polavarapu B. Suravajhala, Prashanth Rathnagiri, P. Sreenivasulu, Nese Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title | Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title_full | Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title_fullStr | Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title_full_unstemmed | Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title_short | Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance |
| title_sort | intriguing role of proline in redox potential conferring high temperature stress tolerance |
| topic | stress protein content reactive oxygen species redox couple |
| url | https://hdl.handle.net/10568/126198 |
| work_keys_str_mv | AT kavikishorpolavarapub intriguingroleofprolineinredoxpotentialconferringhightemperaturestresstolerance AT suravajhalaprashanth intriguingroleofprolineinredoxpotentialconferringhightemperaturestresstolerance AT rathnagirip intriguingroleofprolineinredoxpotentialconferringhightemperaturestresstolerance AT sreenivasulunese intriguingroleofprolineinredoxpotentialconferringhightemperaturestresstolerance |