Roles of endoplasmic reticulum stress and unfolded protein response associated genes in seed stratification and bud endodormancy during chilling accumulation in Prunus persica

PLoS One. 2014 Jul 7;9(7):e101808. doi: 10.1371/journal.pone.0101808. eCollection 2014.

Abstract

Dormancy mechanisms in seeds and buds arrest growth until environmental conditions are optimal for development. A genotype-specific period of chilling is usually required to release dormancy, but the underlying molecular mechanisms are still not fully understood. To discover transcriptional pathways associated with dormancy release common to seed stratification and bud endodormancy, we explored the chilling-dependent expression of 11 genes involved in endoplasmic reticulum stress and the unfolded protein response signal pathways. We propose that endoplasmic reticulum stress and the unfolded protein response impact on seed as well as bud germination and development by chilling-dependent mechanisms. The emerging discovery of similarities between seed stratification and bud endodormancy status indicate that these two processes are probably regulated by common endoplasmic reticulum stress and unfolded protein response signalling pathways. Clarification of regulatory pathways common to both seed and bud dormancy may enhance understanding of the mechanisms underlying dormancy and breeding programs may benefit from earlier prediction of chilling requirements for uniform blooming of novel genotypes of deciduous fruit tree species.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Breeding
  • Endoplasmic Reticulum Stress / genetics*
  • Fruit / growth & development
  • Gene Expression Regulation, Plant
  • Genes, Plant*
  • Genotype
  • Plant Proteins / genetics
  • Plant Proteins / metabolism
  • Prunus / genetics*
  • Prunus / growth & development
  • Prunus / metabolism*
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Seeds / growth & development*
  • Temperature*
  • Transcription Factors / metabolism
  • Transcription, Genetic
  • Unfolded Protein Response / genetics*
  • Up-Regulation

Substances

  • Plant Proteins
  • RNA, Messenger
  • Transcription Factors

Grants and funding

This work was supported by the National Natural Science Foundation of China (31372050) and the Agriculture Science Technology Achievement Transformation Fund (2012GB2C600248). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.