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NaCl‐induced phosphorylation of light harvesting chlorophyll a / b proteins in thylakoid membranes from the halotolerant green alga, Dunaliella salina
Author(s) -
Liu Xian-De,
Shen Yun-Gang
Publication year - 2004
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2004.05.065
Subject(s) - dunaliella salina , thylakoid , spinach , phosphorylation , biochemistry , biology , biophysics , photosystem ii , membrane , chlorophyll , protein phosphorylation , chemistry , photosynthesis , chloroplast , botany , algae , protein kinase a , gene
Light could induce phosphorylation of light harvesting chlorophyll a / b binding proteins (LHCII) in Dunaliella salina and spinach thylakoid membranes. We found that neither phosphorylation was affected by glycerol, whereas treatment with NaCl significantly enhanced light‐induced LHCII phosphorylation in D. salina thylakoid membranes and inhibited that in spinach. Furthermore, even in the absence of light, NaCl and several other salts induced LHCII phosphorylation in D. salina thylakoid membranes, but not in spinach thylakoid membranes. In addition, hypertonic shock induced LHCII phosphorylation in intact D. salina under dark conditions and cells adapted to different NaCl concentrations exhibited similar LHCII phosphorylation levels. Taken together, these results show for the first time that while LHCII phosphorylation of D. salina thylakoid membranes resembles that of spinach thylakoid membranes in terms of light‐mediated control, the two differ with respect to NaCl sensitivity under light and dark conditions.