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fast and transient transcriptional network of gravity and mechanical stimulation in the Arabidopsis root apex
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fast and transient transcriptional network of gravity and mechanical stimulation in the Arabidopsis root apex
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fast and transient transcriptional network of gravity and mechanical stimulation in the Arabidopsis root apex
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Journal Article
fast and transient transcriptional network of gravity and mechanical stimulation in the Arabidopsis root apex
2004
Overview
Plant root growth is affected by both gravity and mechanical stimulation (Massa GD, Gilroy S [2003] Plant J 33: 435-445). A coordinated response to both stimuli requires specific and common elements. To delineate the transcriptional response mechanisms, we carried out whole-genome microarray analysis of Arabidopsis root apices after gravity stimulation (reorientation) and mechanical stimulation and monitored transcript levels of 22,744 genes in a time course during the first hour after either stimulus. Rapid, transient changes in the relative abundance of specific transcripts occurred in response to gravity or mechanical stimulation, and these transcript level changes reveal clusters of coordinated events. Transcriptional regulation occurs in the root apices within less than 2 min after either stimulus. We identified genes responding specifically to each stimulus as well as transcripts regulated in both signal transduction pathways. Several unknown genes were specifically induced only during gravitropic stimulation (gravity induced genes). We also analyzed the network of transcriptional regulation during the early stages of gravitropism and mechanical stimulation.
Publisher
American Society of Plant Biologists,American Society of Plant Physiologists
Subject
Agronomy. Soil science and plant productions
/ Arabidopsis - growth & development
/ Arabidopsis Proteins - genetics
/ Auxins
/ Biological and medical sciences
/ Environmental Stress and Adaptation
/ Fundamental and applied biological sciences. Psychology
/ Gene Expression Regulation, Plant
/ Genes
/ genetics
/ genome
/ gravity
/ Molecular and cellular biology
/ Plant Roots - growth & development
/ Plants
/ RNA
/ Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
/ Transcription Factors - genetics
/ Transcription. Transcription factor. Splicing. Rna processing
