Transcriptome pathways unique to dehydration tolerant relatives of modern wheat

Transcriptome pathways unique to dehydration tolerant relatives of modern wheat Among abiotic stressors, drought is a major factor responsible for dramatic yield loss in agriculture. In order to reveal differences in global expression profiles of drought tolerant and sensitive wild emmer wheat genotypes, a previously deployed shock-like dehydration process was utilized to compare transcriptomes at two time points in root and leaf tissues using the Affymetrix GeneChip® Wheat Genome Array hybridization. The comparison of transcriptomes reveal several unique genes or expression patterns such as differential usage of IP3-dependent signal transduction pathways, ethylene- and abscisic acid (ABA)-dependent signaling, and preferential or faster induction of ABA-dependent transcription factors by the tolerant genotype that distinguish contrasting genotypes indicative of distinctive stress response pathways. The data also show that wild emmer wheat is capable of engaging known drought stress responsive mechanisms. The global comparison of transcriptomes in the absence of and after dehydration underlined the gene networks especially in root tissues that may have been lost in the selection processes generating modern bread wheats. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Functional & Integrative Genomics Springer Journals

Transcriptome pathways unique to dehydration tolerant relatives of modern wheat

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Publisher
Springer Journals
Copyright
Copyright © 2009 by Springer-Verlag
Subject
Life Sciences; Animal Genetics and Genomics; Bioinformatics; Biochemistry, general; Microbial Genetics and Genomics; Cell Biology; Plant Genetics & Genomics
ISSN
1438-793X
eISSN
1438-7948
D.O.I.
10.1007/s10142-009-0123-1
Publisher site
See Article on Publisher Site

Abstract

Among abiotic stressors, drought is a major factor responsible for dramatic yield loss in agriculture. In order to reveal differences in global expression profiles of drought tolerant and sensitive wild emmer wheat genotypes, a previously deployed shock-like dehydration process was utilized to compare transcriptomes at two time points in root and leaf tissues using the Affymetrix GeneChip® Wheat Genome Array hybridization. The comparison of transcriptomes reveal several unique genes or expression patterns such as differential usage of IP3-dependent signal transduction pathways, ethylene- and abscisic acid (ABA)-dependent signaling, and preferential or faster induction of ABA-dependent transcription factors by the tolerant genotype that distinguish contrasting genotypes indicative of distinctive stress response pathways. The data also show that wild emmer wheat is capable of engaging known drought stress responsive mechanisms. The global comparison of transcriptomes in the absence of and after dehydration underlined the gene networks especially in root tissues that may have been lost in the selection processes generating modern bread wheats.

Journal

Functional & Integrative GenomicsSpringer Journals

Published: Mar 28, 2009

References

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