Genome-wide analysis of the NAC transcription factor family and their expression during the development and ripening of the Fragaria × ananassa fruits

PLoS One. 2018 May 3;13(5):e0196953. doi: 10.1371/journal.pone.0196953. eCollection 2018.

Abstract

NAC proteins are a family of transcription factors which have a variety of important regulatory roles in plants. They present a very well conserved group of NAC subdomains in the N-terminal region and a highly variable domain at the C-terminus. Currently, knowledge concerning NAC family in the strawberry plant remains very limited. In this work, we analyzed the NAC family of Fragaria vesca, and a total of 112 NAC proteins were identified after we curated the annotations from the version 4.0.a1 genome. They were placed into the ligation groups (pseudo-chromosomes) and described its physicochemical and genetic features. A microarray transcriptomic analysis showed six of them expressed during the development and ripening of the Fragaria x ananassa fruit. Their expression patterns were studied in fruit (receptacle and achenes) in different stages of development and in vegetative tissues. Also, the expression level under different hormonal treatments (auxins, ABA) and drought stress was investigated. In addition, they were clustered with other NAC transcription factor with known function related to growth and development, senescence, fruit ripening, stress response, and secondary cell wall and vascular development. Our results indicate that these six strawberry NAC proteins could play different important regulatory roles in the process of development and ripening of the fruit, providing the basis for further functional studies and the selection for NAC candidates suitable for biotechnological applications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abscisic Acid / pharmacology
  • Chromosome Mapping
  • Droughts
  • Fragaria / drug effects
  • Fragaria / genetics*
  • Fragaria / growth & development
  • Fragaria / metabolism
  • Fruit / drug effects
  • Fruit / genetics*
  • Fruit / growth & development
  • Fruit / metabolism
  • Gene Expression Profiling
  • Gene Expression Regulation, Developmental
  • Gene Expression Regulation, Plant*
  • Gene Ontology
  • Genome, Plant*
  • Indoleacetic Acids / pharmacology
  • Molecular Sequence Annotation
  • Multigene Family
  • Plant Growth Regulators / pharmacology
  • Plant Proteins / genetics*
  • Plant Proteins / metabolism
  • Stress, Physiological
  • Transcription Factors / genetics*
  • Transcription Factors / metabolism
  • Transcriptome*

Substances

  • Indoleacetic Acids
  • Plant Growth Regulators
  • Plant Proteins
  • Transcription Factors
  • Abscisic Acid

Grants and funding

This work was supported by AGL2014-55784-C2 from the Spanish Ministerio de Ciencia e Innovación.