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Role of singlet oxygen in chloroplast to nucleus retrograde signaling in Chlamydomonas reinhardtii
Author(s) -
Fischer Beat B.,
Krieger-Liszkay Anja,
Hideg Éva,
Šnyrychová Iva,
Wiesendanger Manuela,
Eggen Rik I.L.
Publication year - 2007
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.2007.11.003
Subject(s) - chlamydomonas reinhardtii , singlet oxygen , thylakoid , photosystem ii , chloroplast , photosynthesis , biophysics , chlamydomonas , photosystem i , biology , photochemistry , chemistry , microbiology and biotechnology , biochemistry , oxygen , gene , organic chemistry , mutant
High light illumination of photosynthetic organisms stimulates the production of singlet oxygen by photosystem II and causes photooxidative stress. In Chlamydomonas reinhardtii , singlet oxygen also induces the expression of the nuclear‐encoded glutathione peroxidase homologous gene GPXH . We provide evidence that singlet oxygen stimulates GPXH expression by activating a signaling mechanism outside the thylakoid membrane. Singlet oxygen from photosystem II could be detected with specific probes in the aqueous phase of isolated thylakoid suspensions and the cytoplasm of high light stressed cells. This indicates that singlet oxygen can stimulate a response farther from its production site than generally believed.