Identification of novel components of the unfolded protein response in arabidopsis

Md Amir Hossain, Carlos Henríquez-Valencia, Marcela Gómez-Páez, Joaquín Medina, Ariel Orellana, Jesús Vicente-Carbajosa, Jan Zouhar

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Unfavorable environmental and developmental conditions may cause disturbances in protein folding in the endoplasmic reticulum (ER) that are recognized and counteracted by components of the Unfolded Protein Response (UPR) signaling pathways. The early cellular responses include transcriptional changes to increase the folding and processing capacity of the ER. In this study, we systematically screened a collection of inducible transgenic Arabidopsis plants expressing a library of transcription factors for resistance toward UPR-inducing chemicals. We identified 23 candidate genes that may function as novel regulators of the UPR and of which only three genes (bZIP10, TBF1, and NF-YB3) were previously associated with the UPR. The putative role of identified candidate genes in the UPR signaling is supported by favorable expression patterns in both developmental and stress transcriptional analyses. We demonstrated that WRKY75 is a genuine regulator of the ER-stress cellular responses as its expression was found to be directly responding to ER stress-inducing chemicals. In addition, transgenic Arabidopsis plants expressing WRKY75 showed resistance toward salt stress, connecting abiotic and ER-stress responses.

Original languageEnglish
Article number650
JournalFrontiers in Plant Science
Volume7
Issue numberMAY2016
DOIs
Publication statusPublished - 12 May 2016

Keywords

  • Abiotic stress
  • Arabidopsis
  • Endoplasmic reticulum
  • Transcription factors
  • Unfolded Protein Response

ASJC Scopus subject areas

  • Plant Science

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