Planta

, Volume 233, Issue 3, pp 471–484

miRNA expression patterns of Triticum dicoccoides in response to shock drought stress

Original Article

DOI: 10.1007/s00425-010-1309-4

Cite this article as:
Kantar, M., Lucas, S.J. & Budak, H. Planta (2011) 233: 471. doi:10.1007/s00425-010-1309-4

Abstract

Drought is a major environmental stress factor that affects plant growth and development worldwide. Wild emmer wheat (Triticum turgidum ssp. dicoccoides), the ancestor of domesticated durum wheat (Triticum turgidum ssp. durum), has great potential for improving the understanding of the wheat drought response. MicroRNAs (miRNAs) are a recently discovered class of gene expression regulators that have also been linked to several plant stress responses; however, this relationship is just beginning to be understood. miRNA expression patterns of drought-resistant wild emmer wheat in response to drought stress were investigated using a plant miRNA microarray platform. Expression was detected to be 205 miRNAs in control and 438 miRNAs in drought-stressed leaf and root tissues. Of these miRNAs, the following 13 were differentially regulated in response to drought: miR1867, miR896, miR398, miR528, miR474, miR1450, miR396, miR1881, miR894, miR156, miR1432, miR166 and miR171. Regulation of miRNAs upon 4 and 8 h drought stress applications observed by qRT-PCR. Target transcripts of differentially regulated miRNAs were computationally predicted. In addition to miRNA microarray study, five new conserved T. turgidum miRNAs were identified through a homology-based approach, and their secondary structures and putative targets were predicted. These findings both computationally and experimentally highlight the presence of miRNAs in T. dicoccoides and further extend the role of miRNAs under shock drought stress conditions.

Keywords

MicroRNAMicroarrayGene expression regulatorsTriticum

Abbreviations

miRNA

MicroRNA

mRNA

Messenger RNA

MFEI

Minimum folding free energy index

EST

Expressed seqeunce tag

ABA

Abscisic acid

GRL

Growth factor-like transcription factor

PDH

Proline dehydrogenase

Supplementary material

425_2010_1309_MOESM1_ESM.doc (34 kb)
Supplementary material 1 (DOC 33 kb)

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Biological Sciences and Bioengineering Program, Faculty of Engineering and Natural SciencesSabanci UniversityIstanbulTurkey