naa a22 4500 510788742 CHVBK 20180411083311.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12298-012-0151-5 doi (NATIONALLICENCE)springer-10.1007/s12298-012-0151-5 Effects of dual stress (high salt and high temperature) on the photochemical efficiency of wheat leaves ( Triticum aestivum ) [Elektronische Daten] [Sonal Mathur, Pooja Mehta, Anjana Jajoo] In this study, we have focused on those components of Photosystem (PS) II which are significantly affected by dual stress (high salt and temperature) on wheat as measured by Plant Efficiency Analyser (PEA). It was observed that some of the chlorophyll a fluorescence parameters were temperature dominated, while some other parameters were salt dominated. We have also observed additive effects for parameters like antenna size heterogeneity. An important observation was that in high temperature alone, the K-step was observed at 40°C, while in case of dual stress, the K-step was observed at 45°C, while the Chl a fluorescence transient of 40°C + 0.5M NaCl was quite similar to 35°C transient curve. In the presence of salt, K-step was observed at higher temperature suggesting a protection of OEC by salt. Plants are under dual stress, but effect of temperature stress is less severe in presence of salt stress. Thus, we can say that salt stress caused partial prevention from high temperature stress but it did not cause complete protection of PS II. Prof. H.S. Srivastava Foundation for Science and Society, 2012 Chlorophyll a fluorescence nationallicence High temperature stress nationallicence Salt stress nationallicence Wheat nationallicence Photosystem II nationallicence ABS : Absorbance nationallicence Chl : Chlorophyll nationallicence CSo : Cross section of tested sample at t = 0, proportional to Fo nationallicence DCMU : 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea nationallicence DIo/RC : Dissipation per reaction center nationallicence ETo/RC : Electron transport per reaction center nationallicence Fm : Maximal Chl a fluorescence nationallicence Fo : Minimal Chl a fluorescence nationallicence FR : Fluorescence rise nationallicence Fv = Fm-Fo : Variable fluorescence nationallicence K, J, I : Intermediate steps of Chl a fluorescence rise between Fo and P nationallicence LHC : Light harvesting complex nationallicence OEC : Oxygen evolving complex nationallicence PEA : Plant efficiency analyzer nationallicence PI : Performance index nationallicence PS II : Photosystem II nationallicence PQ : Plastoquinone nationallicence QA : Primary plastoquinone nationallicence QB : Secondary plastoquinone nationallicence RC : Reaction center nationallicence TRo/RC : Trapping per reaction center nationallicence Mathur Sonal School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut Mehta Pooja School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut Jajoo Anjana School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut Physiology and Molecular Biology of Plants Springer-Verlag 19/2(2013-04-01), 179-188 0971-5894 19:2<179 2013 19 12298 https://doi.org/10.1007/s12298-012-0151-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12298-012-0151-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mathur Sonal School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut NATIONALLICENCE 700 1- Mehta Pooja School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut NATIONALLICENCE 700 1- Jajoo Anjana School of Life Science, Devi Ahilya University, 452017, Indore, Madhya Pradesh, India aut NATIONALLICENCE 773 0- Physiology and Molecular Biology of Plants Springer-Verlag 19/2(2013-04-01), 179-188 0971-5894 19:2<179 2013 19 12298 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer