Characterization of PSII photochemistry and thermostability in salt-treated Rumex leaves
- 31 December 2004
- journal article
- Published by Elsevier BV in Journal of Plant Physiology
- Vol. 161 (3), 257-264
- https://doi.org/10.1078/0176-1617-01231
Abstract
A study was conducted, using chlorophyll fluorescence, rapid fluorescence induction kinetics, and polyphasic fluorescence transients, to determine the effect of salt treatment and heat stress on PSII photochemistry in Rumex leaves. Salt treatment was accomplished by adding NaCl solutions of different concentrations ranging from 50 to 200 mmol/L. Heat stress was induced by exposing the plant leaves to temperatures ranging from 29 to 47 degrees C. The control plants were grown without NaCl treatment. The data acquired in this study showed that NaCl treatment alone had no effect on the maximal photochemistry of PSH or the polyphasic rise of chlorophyll fluorescence. However, the NaCl treatment modified heat stress on PSII photochemistry in Rumex leaves, which was manifested by a lesser heat-induced decrease in photochemical quenching (qP), efficiency of excitation energy capture by open PSII reaction centers (Fv'/Fm'), and quantum yield of PSII electron transport (phiPSII). The data also showed that NaCl treatment compromised the impact of heat stress on the capacity of transferring electrons from Q(A)- to Q(B). Furthermore, the NaCl treatment promoted heat resistance of O2-evolving complex (OEC). In summary, NaCl treatment enhanced the thermostability of PSII.Keywords
This publication has 38 references indexed in Scilit:
- Water deficit effects on solute contribution to osmotic adjustment as a function of leaf ageing in three durum wheat (Triticum durum Desf.) cultivars performing differently in arid conditionsPlant Science, 2001
- Chlorophyll Fluorescence as a Possible Tool for Salinity Tolerance Screening in Barley (Hordeum vulgare L.)Plant Physiology, 1994
- Photoprotection and Photoinhibitory DamagePublished by Elsevier BV ,1994
- Photoinhibition of Photosystem II. Inactivation, protein damage and turnoverBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1993
- Growth of cotton under continuous salinity stress: influence on allocation pattern, stomatal and non-stomatal components of photosynthesis and dissipation of excess light energyPlanta, 1992
- A possible role for photosystem II in environmental perturbations of photosynthesisPhysiologia Plantarum, 1991
- Chlorophyll a fluorescence transient as an indicator of active and inactive photosystem II in thylakoid membranesBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1990
- Gas-Exchange Properties of Salt-Stressed Olive (Olea europea L.) LeavesPlant Physiology, 1989
- Photosynthetic Response and Adaptation to Temperature in Higher PlantsAnnual Review of Plant Physiology, 1980
- Photosynthetic Acclimation to Temperature in the Desert Shrub, Larrea divaricataPlant Physiology, 1978