Differential impact of heat stress on the expression of chloroplast-encoded genes

Plant Physiology and Biochemistry : PPB
M N DanilovaV V Kusnetsov

Abstract

Heat shock is one of the major abiotic factors that causes severe retardation in plant growth and development. To dissect the principal effects of hyperthermia on chloroplast gene expression, we studied the temporal dynamics of transcript accumulation for chloroplast-encoded genes in Arabidopsis thaliana and genes for the chloroplast transcription machinery against a background of changes in physiological parameters. A marked reduction in the transcript amounts of the majority of the genes at the early phases of heat shock (HS) was followed by a return to the baseline levels of rbcL and the housekeeping genes clpP, accD, rps14 and rrn16. The decline in the mRNA levels of trnE (for tRNAglu) and the PSI genes psaA and psaB was opposed by the transient increase in the transcript accumulation of ndhF and the PSII genes psbA, psbD, and psbN and their subsequent reduction with the development of stress. However, the up-regulation of PSII genes in response to elevated temperature was absent in the heat stress-sensitive mutants abi1 and abi2 with the impaired degradation of D2 protein. The expression of rpoA and rpoB, which encode subunits of PEP, was strongly down-regulated throughout the duration of the heat treatment. In addition, h...Continue Reading

Citations

Jun 18, 2019·The Journal of Obstetrics and Gynaecology Research·Mina GhatebiMahmoud Elahdadi Salmani
Oct 2, 2020·The EMBO Journal·Monique LiebersRobert Blanvillain
Aug 28, 2020·International Journal of Molecular Sciences·Yi ZhangCongming Lu
Sep 26, 2020·Plant Cell Reports·Anand Nishad, Ashis Kumar Nandi
Oct 16, 2020·Plant, Cell & Environment·Fernanda MarchettiGabriela Carolina Pagnussat

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