Transcriptome profiling of leaf elongation zone under drought in contrasting rice cultivars

PLoS One. 2013;8(1):e54537. doi: 10.1371/journal.pone.0054537. Epub 2013 Jan 23.

Abstract

Inhibition of leaf elongation and expansion is one of the earliest responses of rice to water deficit. Despite this sensitivity, a great deal of genetic variation exists in the extant of leaf elongation rate (LER) reduction in response to declining soil moisture. We analyzed global gene expression in the leaf elongation zone under drought in two rice cultivars with disparate LER sensitivities to water stress. We found little overlap in gene regulation between the two varieties under moderate drought; however, the transcriptional response to severe drought was more conserved. In response to moderate drought, we found several genes related to secondary cell wall deposition that were down regulated in Moroberekan, an LER tolerant variety, but up-regulated in LER sensitive variety IR64.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Wall / genetics*
  • Droughts*
  • Gene Expression Profiling
  • Gene Expression Regulation, Plant*
  • Oryza / anatomy & histology
  • Oryza / cytology
  • Oryza / genetics*
  • Plant Leaves / anatomy & histology
  • Plant Leaves / cytology
  • Plant Leaves / genetics*
  • Plant Proteins / genetics*
  • Plant Proteins / metabolism
  • Stress, Physiological / genetics
  • Transcription Factors / genetics*
  • Transcription Factors / metabolism
  • Transcription, Genetic

Substances

  • Plant Proteins
  • Transcription Factors

Associated data

  • GEO/GPL16106
  • GEO/GSE41159

Grants and funding

This work was funded by the Bill and Melinda Gates Foundation project “Stress-Tolerant Rice for Africa and South Asia.” The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.