Carbon assimilation in oak (Quercus spp.) populations under acute and chronic high-temperature stress
| Autor: | Milan Borišev, Milan Župunski, Danijela Arsenov, Rita Horák, Saša Orlović, Nataša Nikolić, Slobodanka Pajević |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Stomatal conductance biology Physiology Quercus cerris Assimilation (biology) 04 agricultural and veterinary sciences Plant Science biology.organism_classification Photosynthesis 01 natural sciences Acclimatization lcsh:QK1-989 Quercus robur Horticulture lcsh:Botany 040103 agronomy & agriculture 0401 agriculture forestry and fisheries fluorescence gas exchange heat stress random forest analysis water-use efficiency Water-use efficiency 010606 plant biology & botany Transpiration |
| Zdroj: | Photosynthetica, Vol 57, Iss 3, Pp 875-889 (2019) |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | © The authors. This study tried to evaluate the influence of high temperatures (HT) on carbon assimilation of two oak species (Quercus cerris and Quercus robur). The screening of their populations, which are assumed to have a different resistance and acclimatization potential to adverse environmental conditions, can provide essential information for its implementation in reforestation strategies. By employing principal component analysis, the aim was to determine the most variable physiological characteristics of plants exposed to extremely HT during vegetation periods. After 2 d of HT treatment, a significant decline of photosynthetic and transpiration rates, and stomatal conductance were observed in plants of all investigated populations. The decrease of photosynthetic parameters after 2 d of HT treatment was regulated by the stomatal closure which caused the limitation of CO2 assimilation. Contrary, a chronic HT stress led to an increase in gs and inhibition of photosynthesis at the level of carboxylation. |
| Databáze: | OpenAIRE |
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