期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
卷 104, 期 1-2, 页码 308-313出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2011.02.016
关键词
Photosystem II; Heterogeneity; Salt stress; Wheat; Delayed fluorescence; Prompt fluorescence
资金
- Council of Scientific and Industrial Research (CSIR), India
- Department of Science and Technology (DST), India [INT/ILTP/B6.27]
- Russian Foundation for Basic Research [11-04-01389a, 11-04-92100a]
- Russian Ministry of Science and Education [2010-1.2.1.-102-022-033]
- Russian Academy of Sciences
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 alpha, beta and gamma PSII centers, is changed under salt stress conditions. At higher salt concentration, there is a decrease in the number of a PSII centers with simultaneous increase in the amount of beta and gamma 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 Q(B)-non-reducing centers is observed under salt stress. (C) 2011 Elsevier B.V. All rights reserved.
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