Functional & Integrative Genomics

, Volume 10, Issue 2, pp 167–186

Multilevel regulation and signalling processes associated with adaptation to terminal drought in wild emmer wheat

Authors

  • Tamar Krugman
    • Department of Evolutionary and Environmental Biology, Institute of Evolution, Faculty of Natural SciencesUniversity of Haifa
  • Véronique Chagué
    • Unité de Recherche en Génomique Végétale (URGV)INRA
  • Zvi Peleg
    • Department of Evolutionary and Environmental Biology, Institute of Evolution, Faculty of Natural SciencesUniversity of Haifa
    • The Robert H. Smith Institute of Plant Science and Genetics in AgricultureThe Hebrew University of Jerusalem
  • Sandrine Balzergue
    • Unité de Recherche en Génomique Végétale (URGV)INRA
  • Jérémy Just
    • Unité de Recherche en Génomique Végétale (URGV)INRA
  • Abraham B. Korol
    • Department of Evolutionary and Environmental Biology, Institute of Evolution, Faculty of Natural SciencesUniversity of Haifa
  • Eviatar Nevo
    • Department of Evolutionary and Environmental Biology, Institute of Evolution, Faculty of Natural SciencesUniversity of Haifa
  • Yehoshua Saranga
    • The Robert H. Smith Institute of Plant Science and Genetics in AgricultureThe Hebrew University of Jerusalem
  • Boulos Chalhoub
    • Unité de Recherche en Génomique Végétale (URGV)INRA
    • Department of Evolutionary and Environmental Biology, Institute of Evolution, Faculty of Natural SciencesUniversity of Haifa
Original Paper

DOI: 10.1007/s10142-010-0166-3

Cite this article as:
Krugman, T., Chagué, V., Peleg, Z. et al. Funct Integr Genomics (2010) 10: 167. doi:10.1007/s10142-010-0166-3

Abstract

Low water availability is the major environmental factor limiting crop productivity. Transcriptome analysis was used to study terminal drought response in wild emmer wheat, Triticum dicoccoides, genotypes contrasting in their productivity and yield stability under drought stress. A total of 5,892 differentially regulated transcripts were identified between drought and well-watered control and/or between drought resistant (R) and drought susceptible (S) genotypes. Functional enrichment analyses revealed that multilevel regulatory and signalling processes were significantly enriched among the drought-induced transcripts, in particular in the R genotype. Therefore, further analyses were focused on selected 221 uniquely expressed or highly abundant transcripts in the R genotype, as potential candidates for drought resistance genes. Annotation of the 221 genes revealed that 26% of them are involved in multilevel regulation, including: transcriptional regulation, RNA binding, kinase activity and calcium and abscisic acid signalling implicated in stomatal closure. Differential expression patterns were also identified in genes known to be involved in drought adaptation pathways, such as: cell wall adjustment, cuticular wax deposition, lignification, osmoregulation, redox homeostasis, dehydration protection and drought-induced senescence. These results demonstrate the potential of wild emmer wheat as a source for candidate genes for improving drought resistance.

Keywords

ABAMicroarrayAbiotic stressTranscriptomeDrought resistanceGene discoveryWheat

Supplementary material

10142_2010_166_MOESM1_ESM.xls (86 kb)
Table 4(XLS 86.5 kb)
10142_2010_166_MOESM2_ESM.xls (50 kb)
Table 5(XLS 49 kb)

Copyright information

© Springer-Verlag 2010