Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.)
Wheat is a staple food crop for the majority of the world’s population. Heat stress affects reproductive development, seed-set and seed weight, eventually reducing yield and total biomass in wheat. Stay-green contributes to seed weight by allowing more assimilate partitioning to grain. Conversely, s...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
2025
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/175528 |
| _version_ | 1855543485321445376 |
|---|---|
| author | Lekhana, M. V. Meena, Rajesh Kumar Anirudh, T. V. Barman, Mainak Kumar, Abhishek Reddy, M. S. Sai Sharma, Amit Kumar Rajeev, Nayan Bahuguna Singh, Satish Kumar |
| author_browse | Anirudh, T. V. Barman, Mainak Kumar, Abhishek Lekhana, M. V. Meena, Rajesh Kumar Rajeev, Nayan Bahuguna Reddy, M. S. Sai Sharma, Amit Kumar Singh, Satish Kumar |
| author_facet | Lekhana, M. V. Meena, Rajesh Kumar Anirudh, T. V. Barman, Mainak Kumar, Abhishek Reddy, M. S. Sai Sharma, Amit Kumar Rajeev, Nayan Bahuguna Singh, Satish Kumar |
| author_sort | Lekhana, M. V. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Wheat is a staple food crop for the majority of the world’s population. Heat stress affects reproductive development, seed-set and seed weight, eventually reducing yield and total biomass in wheat. Stay-green contributes to seed weight by allowing more assimilate partitioning to grain. Conversely, senescence is essential for the recycling of nutrients to developing grain. We have studied a set of 26 high-yielding wheat genotypes to study the effect of terminal heat stress on the stay-green and senescence process to explain genetic variation and trade-off associated between grain yield and grain nutrients under field conditions. Our results revealed that heat stress accelerated the senescence process and significantly reduced average grain filling duration by 8 days. The negative effect of heat stress on spikelet fertility and seed weight resulted in reduced grain yield (25%). On the contrary, a positive influence of heat was observed on grain protein (6–21%), grain minerals, and reduced C:N ratio. Interestingly, genotype (HTWYT42) with a longer stay-green period, showed higher yield under heat stress, whereas genotype (HTWYT43) showed early onset but a slower pace of senescence accumulating more grain protein, minerals and lower C:N ratio under heat stress. This study demonstrates a strong trade-off between grain yield and nutrition. However, maintaining an optimum balance between stay-green and a slower rate of senescence could be crucial to minimizing this trade-off, and achieving both higher yield and improve grain nutrition. Furthermore, understanding the mechanisms underlying slower senescence in source tissues could be essential for developing wheat genotypes with enhanced grain nutrient content. |
| format | Journal Article |
| id | CGSpace175528 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1755282025-11-14T22:00:20Z Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) Lekhana, M. V. Meena, Rajesh Kumar Anirudh, T. V. Barman, Mainak Kumar, Abhishek Reddy, M. S. Sai Sharma, Amit Kumar Rajeev, Nayan Bahuguna Singh, Satish Kumar crop yield genetic variation grain heat stress stay-green wheat Wheat is a staple food crop for the majority of the world’s population. Heat stress affects reproductive development, seed-set and seed weight, eventually reducing yield and total biomass in wheat. Stay-green contributes to seed weight by allowing more assimilate partitioning to grain. Conversely, senescence is essential for the recycling of nutrients to developing grain. We have studied a set of 26 high-yielding wheat genotypes to study the effect of terminal heat stress on the stay-green and senescence process to explain genetic variation and trade-off associated between grain yield and grain nutrients under field conditions. Our results revealed that heat stress accelerated the senescence process and significantly reduced average grain filling duration by 8 days. The negative effect of heat stress on spikelet fertility and seed weight resulted in reduced grain yield (25%). On the contrary, a positive influence of heat was observed on grain protein (6–21%), grain minerals, and reduced C:N ratio. Interestingly, genotype (HTWYT42) with a longer stay-green period, showed higher yield under heat stress, whereas genotype (HTWYT43) showed early onset but a slower pace of senescence accumulating more grain protein, minerals and lower C:N ratio under heat stress. This study demonstrates a strong trade-off between grain yield and nutrition. However, maintaining an optimum balance between stay-green and a slower rate of senescence could be crucial to minimizing this trade-off, and achieving both higher yield and improve grain nutrition. Furthermore, understanding the mechanisms underlying slower senescence in source tissues could be essential for developing wheat genotypes with enhanced grain nutrient content. 2025-10 2025-07-07T19:16:39Z 2025-07-07T19:16:39Z Journal Article https://hdl.handle.net/10568/175528 en Open Access Springer Lekhana, M. V.; Meena, Rajesh Kumar; Anirudh, T. V.; Barman, Mainak; Kumar, Abhishek; Reddy, M. S. Sai; et al. 2025. Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.). Plant Growth Regulation 105(5): 1545-1557. https://doi.org/10.1007/s10725-025-01345-z |
| spellingShingle | crop yield genetic variation grain heat stress stay-green wheat Lekhana, M. V. Meena, Rajesh Kumar Anirudh, T. V. Barman, Mainak Kumar, Abhishek Reddy, M. S. Sai Sharma, Amit Kumar Rajeev, Nayan Bahuguna Singh, Satish Kumar Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title | Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title_full | Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title_fullStr | Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title_full_unstemmed | Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title_short | Effect of terminal heat stress on stay-green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat (Triticum aestivum L.) |
| title_sort | effect of terminal heat stress on stay green and senescence process could explain genetic variation in grain yield and nutritional profile in wheat triticum aestivum l |
| topic | crop yield genetic variation grain heat stress stay-green wheat |
| url | https://hdl.handle.net/10568/175528 |
| work_keys_str_mv | AT lekhanamv effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT meenarajeshkumar effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT anirudhtv effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT barmanmainak effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT kumarabhishek effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT reddymssai effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT sharmaamitkumar effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT rajeevnayanbahuguna effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml AT singhsatishkumar effectofterminalheatstressonstaygreenandsenescenceprocesscouldexplaingeneticvariationingrainyieldandnutritionalprofileinwheattriticumaestivuml |