Photosynthetic performance and sugar variations during key reproductive stages of soybean under potassium iodide-simulated terminal drought
| Autor: | Debashree Sengupta, Attipalli Ramachandra Reddy, Divya K. Unnikrishnan, Sureshbabu Marriboina |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Sucrose Physiology fungi Plant physiology food and beverages 04 agricultural and veterinary sciences Plant Science Biology Photosynthesis 01 natural sciences chemical desiccation glycine max hexose to sucrose ratio linear regression photosynthetic carbon exchange rate lcsh:QK1-989 chemistry.chemical_compound Horticulture Point of delivery chemistry Chlorophyll lcsh:Botany 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Sugar Desiccation 010606 plant biology & botany Transpiration |
| Zdroj: | Photosynthetica, Vol 57, Iss 2, Pp 458-469 (2019) |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | Importance of utilizing chemical desiccants to simulate terminal drought effects is gradually increasing. In the present study, a potassium iodide (KI)-simulated terminal drought stress was imposed during the full bloom (R2), pod elongation (R4), and seed initiation (R5) stages of soybean; the KI-induced desiccation effects were assessed at 1, 3, and 5 d after spraying (DASP). Plants responded to KI-simulated terminal drought stress within 1 DASP of KI-treatment, in terms of photosynthetic and transpiration rates. Seed initiation stage was found to be comparatively tolerant to KI-induced desiccation, with respect to chlorophyll degradation and PSII efficiency, which correlated well with the high hexose accumulation during this period. The present study provides a basic understanding regarding the stage-specific responses of soybean towards KI-simulated terminal drought, with respect to photosynthetic performance and sugar status and a correlation between the two traits, which could be useful for developing terminal drought-tolerant varieties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|