Genome-wide identification and expression analysis of the CaNAC family members in chickpea during development, dehydration and ABA treatments

PLoS One. 2014 Dec 5;9(12):e114107. doi: 10.1371/journal.pone.0114107. eCollection 2014.

Abstract

The plant-specific NAC transcription factors (TFs) play important roles in regulation of diverse biological processes, including development, growth, cell division and responses to environmental stimuli. In this study, we identified the members of the NAC TF family of chickpea (Cicer arietinum) and assess their expression profiles during plant development and under dehydration and abscisic acid (ABA) treatments in a systematic manner. Seventy-one CaNAC genes were detected from the chickpea genome, including 8 membrane-bound members of which many might be involved in dehydration responses as judged from published literature. Phylogenetic analysis of the chickpea and well-known stress-related Arabidopsis and rice NACs enabled us to predict several putative stress-related CaNACs. By exploring available transcriptome data, we provided a comprehensive expression atlas of CaNACs in various tissues at different developmental stages. With the highest interest in dehydration responses, we examined the expression of the predicted stress-related and membrane-bound CaNACs in roots and leaves of chickpea seedlings, subjected to well-watered (control), dehydration and ABA treatments, using real-time quantitative PCR (RT-qPCR). Nine-teen of the 23 CaNACs examined were found to be dehydration-responsive in chickpea roots and/or leaves in either ABA-dependent or -independent pathway. Our results have provided a solid foundation for selection of promising tissue-specific and/or dehydration-responsive CaNAC candidates for detailed in planta functional analyses, leading to development of transgenic chickpea varieties with improved productivity under drought.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abscisic Acid / administration & dosage
  • Arabidopsis
  • Cicer / genetics*
  • Cicer / growth & development
  • Droughts
  • Gene Expression Regulation, Plant / drug effects
  • Genome, Plant
  • Multigene Family / genetics*
  • Phylogeny*
  • Plant Leaves / growth & development
  • Plant Leaves / physiology
  • Stress, Physiological
  • Transcription Factors / biosynthesis*
  • Transcription Factors / genetics

Substances

  • Transcription Factors
  • Abscisic Acid

Grants and funding

CVH is supported by a PhD fellowship from "International Program Associate" of Rikagaku Kenkyusho (Institute of Physical and Chemical Research, Japan) (http://www.riken.jp/en/careers/programs/ipa/). This work was also supported in part by a grant (Project Code 905/HĐ-KHCN-CNSH) from the Ministry of Agriculture and Rural Development of Vietnam and the Ministry of Science and Technology of Vietnam to the Research Group of DVN. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.