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Cold acclimation of the Arabidopsis dgd1 mutant results in recovery from photosystem I‐limited photosynthesis
Author(s) -
Hendrickson Luke,
Vlčková Alexandra,
Selstam Eva,
Huner Norman,
Öquist Gunnar,
Hurry Vaughan
Publication year - 2006
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.2006.07.081
Subject(s) - thylakoid , photosystem ii , photosynthesis , mutant , arabidopsis thaliana , arabidopsis , photosystem , acclimatization , biology , cold sensitivity , botany , photosystem i , wild type , biophysics , chloroplast , chemistry , biochemistry , microbiology and biotechnology , gene
We compared the thylakoid membrane composition and photosynthetic properties of non‐ and cold‐acclimated leaves from the dgd1 mutant (lacking >90% of digalactosyl–diacylglycerol; DGDG) and wild type (WT) Arabidopsis thaliana . In contrast to warm grown plants, cold‐acclimated dgd1 leaves recovered pigment‐protein pools and photosynthetic function equivalent to WT. Surprisingly, this recovery was not correlated with an increase in DGDG. When returned to warm temperatures the severe dgd1 mutant phenotype reappeared. We conclude that the relative recovery of photosynthetic activity at 5 °C resulted from a temperature/lipid interaction enabling the stable assembly of PSI complexes in the thylakoid.