Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice
High‐temperature during flowering in rice causes spikelet sterility and is a major threat to rice productivity in tropical and subtropical regions, where hybrid rice development is increasingly contributing to sustain food security. However, the sensitivity of hybrids to increasing temperature and p...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2018
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| Acceso en línea: | https://hdl.handle.net/10568/164905 |
| _version_ | 1855528824275468288 |
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| author | Shi, Wanju Li, Xiang Schmidt, Ralf C. Struik, Paul C. Yin, Xinyou Jagadish, Krishna S.V. |
| author_browse | Jagadish, Krishna S.V. Li, Xiang Schmidt, Ralf C. Shi, Wanju Struik, Paul C. Yin, Xinyou |
| author_facet | Shi, Wanju Li, Xiang Schmidt, Ralf C. Struik, Paul C. Yin, Xinyou Jagadish, Krishna S.V. |
| author_sort | Shi, Wanju |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | High‐temperature during flowering in rice causes spikelet sterility and is a major threat to rice productivity in tropical and subtropical regions, where hybrid rice development is increasingly contributing to sustain food security. However, the sensitivity of hybrids to increasing temperature and physiological responses in terms of dynamic fertilization processes is unknown. To address these questions, several promising hybrids and inbreds were exposed to control temperature and high day‐time temperature (HDT) in Experiment 1, and hybrids having contrasting heat tolerance were selected for Experiment 2 for further physiological investigation under HDT and high‐night‐time‐temperature treatments. The day‐time temperature played a dominant role in determining spikelet fertility compared with the night‐time temperature. HDT significantly induced spikelet sterility in tested hybrids, and hybrids had higher heat susceptibility than the high‐yielding inbred varieties. Poor pollen germination was strongly associated with sterility under high‐temperature. Our novel observations capturing the series of dynamic fertilization processes demonstrated that pollen tubes not reaching the viable embryo sac was the major cause for spikelet sterility under heat exposure. Our findings highlight the urgent need to improve heat tolerance in hybrids and incorporating early‐morning flowering as a promising trait for mitigating HDT stress impact at flowering. |
| format | Journal Article |
| id | CGSpace164905 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1649052025-05-14T10:24:14Z Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice Shi, Wanju Li, Xiang Schmidt, Ralf C. Struik, Paul C. Yin, Xinyou Jagadish, Krishna S.V. High‐temperature during flowering in rice causes spikelet sterility and is a major threat to rice productivity in tropical and subtropical regions, where hybrid rice development is increasingly contributing to sustain food security. However, the sensitivity of hybrids to increasing temperature and physiological responses in terms of dynamic fertilization processes is unknown. To address these questions, several promising hybrids and inbreds were exposed to control temperature and high day‐time temperature (HDT) in Experiment 1, and hybrids having contrasting heat tolerance were selected for Experiment 2 for further physiological investigation under HDT and high‐night‐time‐temperature treatments. The day‐time temperature played a dominant role in determining spikelet fertility compared with the night‐time temperature. HDT significantly induced spikelet sterility in tested hybrids, and hybrids had higher heat susceptibility than the high‐yielding inbred varieties. Poor pollen germination was strongly associated with sterility under high‐temperature. Our novel observations capturing the series of dynamic fertilization processes demonstrated that pollen tubes not reaching the viable embryo sac was the major cause for spikelet sterility under heat exposure. Our findings highlight the urgent need to improve heat tolerance in hybrids and incorporating early‐morning flowering as a promising trait for mitigating HDT stress impact at flowering. 2018-06 2024-12-19T12:54:27Z 2024-12-19T12:54:27Z Journal Article https://hdl.handle.net/10568/164905 en Wiley Shi, Wanju; Li, Xiang; Schmidt, Ralf C.; Struik, Paul C.; Yin, Xinyou and Jagadish, S.V. Krishna. 2018. Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice. Plant Cell and Environment, Volume 41 no. 6 p. 1287-1297 |
| spellingShingle | Shi, Wanju Li, Xiang Schmidt, Ralf C. Struik, Paul C. Yin, Xinyou Jagadish, Krishna S.V. Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title | Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title_full | Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title_fullStr | Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title_full_unstemmed | Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title_short | Pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| title_sort | pollen germination and in vivo fertilization in response to high temperature during flowering in hybrid and inbred rice |
| url | https://hdl.handle.net/10568/164905 |
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