| Autor: |
Zia A; Department of Biology, University of Hafr Al-Batin, Hafr Al-Batin 31991, Saudi Arabia., Gulzar S; Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi 75270, Pakistan., Ruban AV; School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK. |
| Jazyk: |
angličtina |
| Zdroj: |
Functional plant biology : FPB [Funct Plant Biol] 2024 Apr; Vol. 51. |
| DOI: |
10.1071/FP23272 |
| Abstrakt: |
Chlorophyll a fluorescence parameters related to PSII photochemistry, photoprotection and photoinhibition were investigated in four C3 plant species growing in their natural habitat: Prosopis juliflora ; Abutilon indicum ; Salvadora persica ; and Phragmites karka . This study compared the light reaction responses of P. juliflora , an invasive species, with three native co-existing species, which adapt to varying water deficit and high salt stress. Chlorophyll a fluorescence quenching analyses revealed that P. juliflora had the highest photochemical quantum efficiency and yield, regulated by higher fraction of open reaction centres and reduced photoprotective energy dissipation without compromising the integrity of photosynthetic apparatus due to photoinhibition. Moreover, the elevated values of parameters obtained through polyphasic chlorophyll a fluorescence induction kinetics, which characterise the photochemistry of PSII and electron transport, highlighted the superior performance index of energy conservation in the transition from excitation to the reduction of intersystem electron carriers for P. juliflora compared to other species. Enhanced pigment contents and their stoichiometry in P. juliflora apparently contributed to upregulating fluxes and yields of energy absorbance, trapping and transport. This enhanced photochemistry, along with reduced non-photochemical processes, could explain the proclivity for invasion advantage in P. juliflora across diverse stress conditions. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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