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Transcriptome pathways unique to dehydration tolerant relatives of modern wheat

Ergen, Zahide Neslihan and Thimmapuram, Jyothi and Bohnert, Hans J. and Budak, Hikmet (2009) Transcriptome pathways unique to dehydration tolerant relatives of modern wheat. Functional and Integrative Genomics, 9 (3). pp. 377-396. ISSN 1438-793X (Print) 1438-7948 (Online)

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Official URL: http://dx.doi.org/10.1007/s10142-009-0123-1

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(R) Wheat Genome Array hybridization. The comparison of transcriptomes reveal several unique genes or expression patterns such as differential usage of IP(3)-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.

Item Type:Article
Uncontrolled Keywords:Wild emmer wheat; Shock dehydration; Affymetrix GeneChip (R) wheat genome array; Abiotic stress; Transcriptome comparison
Subjects:UNSPECIFIED
ID Code:13595
Deposited By:Hikmet Budak
Deposited On:22 Dec 2009 10:56
Last Modified:25 May 2011 14:05

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