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Updated: May 5, 2026

Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis
Published on: June 4, 2021
Age-dependent variations in transcriptional response to wounding and gibberellic acid in a higher plant
B Wielgat1, M Wechselberger, G Kahl
1Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
Abstract:
The reaction of potato tuber tissue upon wounding and gibberellic acid (GA3) treatment is strictly dependent on the tuber age. Young, rapidly growing tubers decline both chromatin-bound, DNA-dependent RNA polymerase (EC 2.7.7.6) activity and template availability as a consequence of wounding and are not responsive toward GA3. At the onset of dormancy, ripened tubers do not at all respond to wounding or hormones, but later on develop the ability to increase their transcriptional rate and template accessibility, both after injury and treatment with 10(-7) mol l(-1) GA3. The size of the nucleolus and the rRNA content of the ribosomal population follows the same pattern.
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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...
Cell Signaling in Plants
Morphogenesis
Responses to Heat and Cold Stress
Gene Regulation During Sporulation
Diversity in Cell Signaling Responses
Graded and Abrupt Responses
Some signaling systems generate...

