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Does the chloroplast small heat shock protein protect photosystem II during heat stress in vitro?
Author(s) -
Härndahl Ulrika,
Sundby Cecilia
Publication year - 2001
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1034/j.1399-3054.2001.1110302.x
Subject(s) - thylakoid , photosystem ii , chloroplast , heat shock protein , heat stress , chemistry , biophysics , microbiology and biotechnology , photosynthesis , biology , biochemistry , gene , zoology
It has been suggested that the function of the chloroplast‐localized small heat shock protein (sHsp) is to protect photosystem II (PSII) from heat inactivation. This paper reports that addition of purified sHsp protein to isolated thylakoid membranes gave no protection of PSII and questions that there is any direct effect of the sHsp on PSII. The opinion is forwarded that the primary role for the chloroplast‐localized sHsp may not even be protection of PSII.