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Light‐regulated expression of the psbA transcript in the cyanobacterium Anacystis nidulans
Author(s) -
Lönneborg A.,
Kalla S.R.,
Samuelsson G.,
Gustafsson P.,
Öquist G.
Publication year - 1988
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 - 10.1016/0014-5793(88)80349-1
Subject(s) - photoinhibition , photosynthesis , biology , photon flux , gene , gene expression , protein biosynthesis , microbiology and biotechnology , biophysics , botany , biochemistry , photosystem ii , photon , physics , optics
The level of photoinhibition as well as the rate of recovery of photosynthesis increases with increasing light intensities in Anacystis nidulans . In addition, the recovery from photoinhibition is insensitive to rifampicin. We found that the amount of psbA ‐specific mRNAs, coding for the D1 protein, was higher in cells grown in high rather than in low photon flux densities of white light. The results support the hypothesis that the rate of synthesis of the D1 protein plays a role both in the susceptibility of photosynthesis to photoinhibition and during recovery from photoinhibition. In addition, we found that a majority of the mRNAs specific for the psbA gene could be detected intact 90 min after the addition of rifampicin.