Heat stress during gametogenesis irreversibly damages female reproductive organ in rice
Heat stress during gametogenesis leads to spikelet sterility. To ascertain the role of female reproductive organ (pistil), two rice genotypes N22 and IR64 with contrasting heat stress responses were exposed to control (30 °C) and heat stress (38 °C and 40 °C) during megasporogenesis. Anatomical obse...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/164055 |
| _version_ | 1855541186937225216 |
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| author | Shi, Wanju Yang, Juan Kumar, Ritesh Zhang, Xinzheng Impa, Somayanda M. Xiao, Gui Jagadish, Krishna S.V. |
| author_browse | Impa, Somayanda M. Jagadish, Krishna S.V. Kumar, Ritesh Shi, Wanju Xiao, Gui Yang, Juan Zhang, Xinzheng |
| author_facet | Shi, Wanju Yang, Juan Kumar, Ritesh Zhang, Xinzheng Impa, Somayanda M. Xiao, Gui Jagadish, Krishna S.V. |
| author_sort | Shi, Wanju |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Heat stress during gametogenesis leads to spikelet sterility. To ascertain the role of female reproductive organ (pistil), two rice genotypes N22 and IR64 with contrasting heat stress responses were exposed to control (30 °C) and heat stress (38 °C and 40 °C) during megasporogenesis. Anatomical observations of ovule revealed greater disappearance of megaspore mother cell and nuclei at early stages, and during later stages mature embryo sac without female germ unit, improper positioning of nuclei, and shrunken embryo sac was observed in the sensitive IR64. Under heat stress, a decrease in sugar and starch, increase in H2O2 and malondialdehyde with lower antioxidant enzyme activities were recorded in pistils of both N22 and IR64. Lower accumulation of TCA cycle metabolites and amino acids were noticed in IR64 pistils under heat stress at gametogenesis, whereas N22 exhibited favorable metabolite profiles. At heading, however, N22 pistils had higher carbohydrate accumulation and better ROS homeostasis, suggesting higher recovery after heat stress exposure. In summary, the results indicate that heat stress during megasporogenesis leads to irreversible anatomical and physiological changes in pistil and alters metabolic signatures leading to increased spikelet sterility in rice. Mechanisms identified for enhanced heat tolerance in pistil can help in developing rice varieties that are better adapted to future hotter climate. |
| format | Journal Article |
| id | CGSpace164055 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1640552025-05-14T10:24:30Z Heat stress during gametogenesis irreversibly damages female reproductive organ in rice Shi, Wanju Yang, Juan Kumar, Ritesh Zhang, Xinzheng Impa, Somayanda M. Xiao, Gui Jagadish, Krishna S.V. plant science soil science agronomy and crop science Heat stress during gametogenesis leads to spikelet sterility. To ascertain the role of female reproductive organ (pistil), two rice genotypes N22 and IR64 with contrasting heat stress responses were exposed to control (30 °C) and heat stress (38 °C and 40 °C) during megasporogenesis. Anatomical observations of ovule revealed greater disappearance of megaspore mother cell and nuclei at early stages, and during later stages mature embryo sac without female germ unit, improper positioning of nuclei, and shrunken embryo sac was observed in the sensitive IR64. Under heat stress, a decrease in sugar and starch, increase in H2O2 and malondialdehyde with lower antioxidant enzyme activities were recorded in pistils of both N22 and IR64. Lower accumulation of TCA cycle metabolites and amino acids were noticed in IR64 pistils under heat stress at gametogenesis, whereas N22 exhibited favorable metabolite profiles. At heading, however, N22 pistils had higher carbohydrate accumulation and better ROS homeostasis, suggesting higher recovery after heat stress exposure. In summary, the results indicate that heat stress during megasporogenesis leads to irreversible anatomical and physiological changes in pistil and alters metabolic signatures leading to increased spikelet sterility in rice. Mechanisms identified for enhanced heat tolerance in pistil can help in developing rice varieties that are better adapted to future hotter climate. 2022-12 2024-12-19T12:53:23Z 2024-12-19T12:53:23Z Journal Article https://hdl.handle.net/10568/164055 en Open Access Springer Shi, Wanju; Yang, Juan; Kumar, Ritesh; Zhang, Xinzheng; Impa, Somayanda M.; Xiao, Gui and Jagadish, S. V. Krishna. 2022. Heat stress during gametogenesis irreversibly damages female reproductive organ in rice. Rice, Volume 15, no. 1 |
| spellingShingle | plant science soil science agronomy and crop science Shi, Wanju Yang, Juan Kumar, Ritesh Zhang, Xinzheng Impa, Somayanda M. Xiao, Gui Jagadish, Krishna S.V. Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title | Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title_full | Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title_fullStr | Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title_full_unstemmed | Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title_short | Heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| title_sort | heat stress during gametogenesis irreversibly damages female reproductive organ in rice |
| topic | plant science soil science agronomy and crop science |
| url | https://hdl.handle.net/10568/164055 |
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