Differential response of photosystem II and I photochemistry in leaves of two Crambe abyssinica Hochst lineages submitted to water deficit
| Autor: | João Paulo Rodrigues Martins, R. Bonomo, P.C.S. Braga, R.M. Borges, Antelmo Ralph Falqueto, J.V.G. Silva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Stomatal conductance photochemical tolerance Photosystem II Physiology Plastoquinone Plant Science Photochemistry chlorophyll a fluorescence 01 natural sciences Water deficit chemistry.chemical_compound lcsh:Botany Water content performance index Abiotic component ojip curves biology Chemistry Crambe abyssinica 04 agricultural and veterinary sciences biology.organism_classification lcsh:QK1-989 Chlorophyll k-band 040103 agronomy & agriculture 0401 agriculture forestry and fisheries jip-test 010606 plant biology & botany |
| Zdroj: | Photosynthetica, Vol 58, Iss 5, Pp 1122-1129 (2020) |
| ISSN: | 1573-9058 0300-3604 |
| Popis: | Water stress is one of the most important abiotic factors affecting plants worldwide. This study compared the photochemical responses of two lineages of Crambe abyssinica (FMS CR 1307 and 1326) under water deficit (WD) conditions. The relative water content (RWC), stomatal conductance, chlorophyll (Chl) index, and Chl a fluorescence were evaluated. FMS CR 1326 showed greater reductions in RWC under WD. The FMS CR 1307 showed greater reductions in the connectivity of energy (L-band) and electron transfer from the oxygen-evolving complex (K-band), followed by a lower ability to maintain the reduction of plastoquinone. However, the increased size of the pool of the final electron acceptors in PSI for this lineage was observed. The FMS CR 1326 plant lineage showed an advantage over the FMS CR 1307 in terms of stability and efficiency of PSII under low water availability conditions. |
| Databáze: | OpenAIRE |
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