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Changes in the level of chloroplast transcripts in pumpkin cotyledons during heat shock
Author(s) -
Kusnetsov V.V.,
Mikulovich T.P.,
Kukina I.M.,
Cherepneva G.N.,
Herrmann R.G.,
Kulaeva O.N.
Publication year - 1993
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(93)80105-4
Subject(s) - chloroplast , plastid , messenger rna , heat shock protein , biology , gene , shock (circulatory) , rna , botany , protein biosynthesis , microbiology and biotechnology , biochemistry , biophysics , chemistry , medicine
The levels of plastid gene transcripts are shown to be controlled by temperature in isolated pumpkin cotyledons. The temperature at which maximum transcript accumulation occurs varies between 38 and 42°C for the genes studied ( rbcL , psaA , psbA , psbB , psbC , psbD , psbE , atpA ). Heat shock‐induced transcript accumulation is transitory with a maximum after an approximately 3 h exposure at high temperatures. On the other hand, the accumulation of rbcL transcript was only moderately thermosensitive. A temperature increase to 46–48°C induces a sharp decrease of transcript levels which correlates with damage to the plant. Relatively little correlation has been noted between RNA and protein patterns. However, there is a remarkable coincidence between temperature dependence of the accumulation of transcripts and the temperature dependence (28–46°C) of the synthesis of chloroplast‐located heat shock proteins indicating that both processes may be related.