Abstract
The impacts of solar UV (280–400 nm) radiation on photosynthetic activities and polypeptide composition of thylakoids of cluster bean (Cyamopsis tetragonoloba L, UV-B sensitive) and black gram (Vigna mungo L., UV-B resistant) plants were compared. The activity of photosystem 1 and especially photosystem 2 increased in cluster bean while decreased in black gram, when either UV-B or UV-B + UV-A radiation was removed as compared to control plants. Exclusion of UV-B radiation caused changes in the protein composition of the thylakoids particularly in the 33, 23 and 17 kDa proteins of photosystem 2.
Abbreviations
- BQ:
-
p-benzoquinone
- DAT:
-
days after treatment
- DCPIP:
-
dichlorophenol indophenol
- MV:
-
methyl viologen
- PAR:
-
photosynthetically active radiation
- PS 1:
-
photosystem 1
- PS 2:
-
photosystem 2
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We thank the University Grants Commission and the Department of Science and Technology, Government of India for financial assistance and Mr. S. Balakrishnan for his technical assistance.
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Amudha, P., Jayakumar, M. & Kulandaivelu, G. Photosystems activities and polypeptide composition of Cyamopsis tetragonoloba and Vigna mungo thylakoids as affected by exclusion of solar UV radiation. Biol Plant 54, 339–343 (2010). https://doi.org/10.1007/s10535-010-0059-2
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DOI: https://doi.org/10.1007/s10535-010-0059-2