Academic Journal
Plant responses to co-occurring heat and water deficit stress::A comparative study of tolerance mechanisms in old and modern wheat genotypes
| العنوان: | Plant responses to co-occurring heat and water deficit stress::A comparative study of tolerance mechanisms in old and modern wheat genotypes |
|---|---|
| المؤلفون: | N. Akula, Nagashree, Abdelhakim, Lamis, Knazovický, Mikulás, Ottosen, Carl-Otto, Rosenqvist , Eva |
| المصدر: | N. Akula , N , Abdelhakim , L , Knazovický , M , Ottosen , C-O & Rosenqvist , E 2024 , ' Plant responses to co-occurring heat and water deficit stress: A comparative study of tolerance mechanisms in old and modern wheat genotypes ' , Plant Physiology and Biochemistry , vol. 210 , 108595 . https://doi.org/10.1016/j.plaphy.2024.108595 |
| سنة النشر: | 2024 |
| المجموعة: | Aarhus University: Research |
| مصطلحات موضوعية: | Chlorophyll fluorescence, Climate change stress, Deficit irrigation, Gas exchange, Heat, Spring wheat, Chlorophyll/metabolism, Genotype, Triticum/genetics, Hot Temperature, Dehydration, Water/metabolism, Stress, Physiological/genetics, Plant Stomata/physiology, Plant Leaves/genetics, Photosynthesis |
| الوصف: | Global climate change increases the likelihood of co-occurrence of hot and dry spells with increased intensity, frequency, and duration. Studying the impact of the two stresses provide a better understanding of tolerance mechanisms in wheat, and our study was focused on revealing plant stress responses to different severities of combined stress at two phenophases in old and modern wheat genotypes. During the stem elongation and anthesis stages, plants were exposed to four treatments: control, deficit irrigation, combined heat, and deficit irrigation at 31 ◦C (HD31) and 37 ◦C (HD37). The modern genotypes were less affected by deficit irrigation at stem elongation as they maintained higher photosynthesis, stomatal conductance, and leaf cooling than old genotypes. When the HD37 stress was imposed during anthesis, the modern genotypes exhibited superior performance compared to the old, which was due to their higher photosynthetic rates resulting from improved biochemical regulation and a higher chlorophyll content. The plant responses varied during two phenophases under the combined stress exposure. Genotypes subjected to HD37 stress during stem elongation, photosynthesis was mainly controlled by stomatal regulation, whereas at anthesis it was predominated by biochemical regulation. These findings contribute to a deeper comprehension of plant tolerance mechanisms in response to different intensities of co-occurring hot and dry weather conditions |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://pure.au.dk/portal/en/publications/c045a7f9-8899-4544-91a6-725b4630fc5c |
| DOI: | 10.1016/j.plaphy.2024.108595 |
| الاتاحة: | https://pure.au.dk/portal/en/publications/c045a7f9-8899-4544-91a6-725b4630fc5c https://doi.org/10.1016/j.plaphy.2024.108595 http://www.scopus.com/inward/record.url?scp=85189494463&partnerID=8YFLogxK |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.E98C7C1F |
| قاعدة البيانات: | BASE |
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