Photosynthetica 2009, 47(1):125-127 | DOI: 10.1007/s11099-009-0019-2
Effects of NaCl stress on photochemical activity and thylakoid membrane polypeptide composition of a salt-tolerant and a salt-sensitive rice cultivar
- 1 Jiangsu Food Science College, Huaian, P. R. China
- 2 Life Science Department of Nanjing Xiaozhuang College, Nanjing, P. R. China
NaCl stress (200 mM) inhibited the electron transport activity of photosystem 2 (PS2) more than that of PS1. The degree of electron transport activity inhibition was lower in the salt-tolerant cultivar Pokkali than in the salt-sensitive cultivar Peta. The polypeptide composition of the thylakoid membrane and PS2 particles did not change after NaCl treatment but there was a difference in polypeptide compositions of thylakoid membrane and PS2 particles between the two cultivars. PS2 particles of cv. Pokkali contained more 33-kDa and 43-kDa polypeptides than cv. Peta. Additionally, PS2 particles after NaCl treatment showed deficiency of 23-kDa outside polypeptides of PS2.
Additional key words: electron transport activity; Oryza; polypeptides; photosystems 1 and 2
Received: July 9, 2008; Accepted: August 30, 2008; Published: March 1, 2009 Show citation
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