TY - JOUR
T1 - Analysis of salt stress induced changes in Photosystem II heterogeneity by prompt fluorescence and delayed fluorescence in wheat (Triticum aestivum) leaves
AU - Mehta, Pooja
AU - Kreslavsky, Vladimir
AU - Bharti, Sudhakar
AU - Allakhverdiev, Suleyman I.
AU - Jajoo, Anjana
N1 - Funding Information:
PM thanks Council of Scientific and Industrial Research (CSIR), India for Senior research Fellowship. AJ thanks Department of Science and Technology (DST), India for the project (INT/ILTP/B6.27). This work was also supported by grants from the Russian Foundation for Basic Research (Nos: 11-04-01389a, 11-04-92100a), from Russian Ministry of Science and Education (No: 2010-1.2.1.-102-022-033), and the Molecular and Cell Biology Programs of the Russian Academy of Sciences. The final copy of this manuscript was edited by Govindjee.
PY - 2011/7/1
Y1 - 2011/7/1
N2 - In order to investigate changes in the heterogeneity of PSII, prompt fluorescence induction curves (PFIC) and delayed fluorescence induction curves (DFIC) were measured in wheat leaves after salt treatment. From these data, antenna heterogeneity and reducing side heterogeneity were estimated. Results show that antenna size, which is further differentiated into α, β and γ PSII centers, is changed under salt stress conditions. At higher salt concentration, there is a decrease in the number of α PSII centers with simultaneous increase in the amount of β and γ PSII centers. Another aspect of antenna heterogeneity is explained in terms of connectivity (or grouping) between PSII centers which did not change significantly under salt stress. Reducing side heterogeneity was assessed by both DFIC and PFIC and results show that a significant increase in the conversion of Q B-reducing centers to QB-non-reducing centers is observed under salt stress.
AB - In order to investigate changes in the heterogeneity of PSII, prompt fluorescence induction curves (PFIC) and delayed fluorescence induction curves (DFIC) were measured in wheat leaves after salt treatment. From these data, antenna heterogeneity and reducing side heterogeneity were estimated. Results show that antenna size, which is further differentiated into α, β and γ PSII centers, is changed under salt stress conditions. At higher salt concentration, there is a decrease in the number of α PSII centers with simultaneous increase in the amount of β and γ PSII centers. Another aspect of antenna heterogeneity is explained in terms of connectivity (or grouping) between PSII centers which did not change significantly under salt stress. Reducing side heterogeneity was assessed by both DFIC and PFIC and results show that a significant increase in the conversion of Q B-reducing centers to QB-non-reducing centers is observed under salt stress.
KW - Delayed fluorescence
KW - Heterogeneity
KW - Photosystem II
KW - Prompt fluorescence
KW - Salt stress
KW - Wheat
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U2 - 10.1016/j.jphotobiol.2011.02.016
DO - 10.1016/j.jphotobiol.2011.02.016
M3 - Article
C2 - 21414797
AN - SCOPUS:79957990115
SN - 1011-1344
VL - 104
SP - 308
EP - 313
JO - Journal of Photochemistry and Photobiology B: Biology
JF - Journal of Photochemistry and Photobiology B: Biology
IS - 1-2
ER -