Chill-Induced Modifications to the Relationship Between Thylakoid Protein Phosphorylation and Energy Distribution to Photosystem 2 in Maize
Phosphorylation of LHC2 and PS2 proteins by membrane-bound kinases is often considered to be an important factor in regulating excitation energy distribution and electron transport (1,2). When maize leaves are chilled in high light damage occurs to the D, reaction centre protein of PS2 (3) and a 31 kDa polypeptide, which is thought to be the unprocessed precursor of CP29 (4), accumulates in LHC2 (5). Such perturbation to PS2 and LHC2 might be expected to result in changes in the characteristics of phosphorylation and its effects on PS2 electron transport. In this study the phosphorylation characteristics and consequences for PS2 electron transport are examined for thylakoids of maize leaves exposed to low temperature under high and low light.
KeywordsMaize Leave Thylakoid Protein Polypeptide Profile Thylakoid Polypeptide Excitation Energy Distribution
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