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Published on: November 9, 2013
Low temperature acclimation and treatment with exogenous abscisic acid induce common polypeptides in Arabidopsis
1Department of Molecular Genetics, Swedish University of Agricultural Sciences, Box 7003, S-750 07, Uppsala, Sweden.
Abstract:
Exogenously applied abscisic acid (ABA) induced frost hardening of Arabidopsis thaliana (L.) Heynh. The freezing tolerance of A. thaliana plantlets treated with ABA (15 mg/l) at a non-acclimating temperature (20 °C) appeared to increase even more rapidly than following a low temperature (4 °C) acclimation. Analysis of in vivo-labelled soluble proteins by two-dimensional gel electrophoresis revealed several low temperature - or ABA - induced proteins, which where not produced in non-acclimated plants. A subset of these proteins was induced by both low temperature and ABA treatments, suggesting that they might be directly involved in the frost hardening process in A. thaliana.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

