Feb 21, 2016

Arabidopsis ATHB17 coordinates nuclear and plastidic photosynthesis gene expression in response to abiotic stress

BioRxiv : the Preprint Server for Biology
Ping ZhaoCheng-Bin Xiang


Photosynthesis is sensitive to environmental stresses. How nuclear and plastid genome coordinate to cope with abiotic stress is not well understood. Here we report that ATHB17, an Arabidopsis HD-Zip transcription factor, coordinates the expression of nuclear encoded photosynthetic genes (NEPGs) and plastid encoded genes (PEGs) in response to abiotic stress. ATHB17-overexpressing plants display enhanced stress tolerance, whereas its knockout mutant is more sensitive compared to the wild type. Through RNA-seq analysis, we found that ATHB17 down-regulated many NEPGs while up-regulated a number of PEGs. ATHB17 could directly modulate the expression of several NEPGs by binding to their promoters. Furthermore, we identified ATSIG5, encoding a plastid sigma factor, as one of the target genes of ATHB17. Loss of ATSIG5 reduced salt tolerance while overexpression of ATSIG5 enhanced salt tolerance, similar to that of ATHB17. Taken together, our results reveal that ATHB17 is an important coordinator between NEPGs and PEGs partially through ATSIG5 to protect photosynthesis machinery in response to abiotic stresses.

  • References
  • Citations


  • We're still populating references for this paper, please check back later.
  • References
  • Citations


  • This paper may not have been cited yet.

Mentioned in this Paper

Polyethylene glycol 8
Peg-shaped Teeth
Cellular Response to Abiotic Stimulus
Genome, Plastid
Gene Expression

About this Paper

Related Feeds

BioRxiv & MedRxiv Preprints

BioRxiv and MedRxiv are the preprint servers for biology and health sciences respectively, operated by Cold Spring Harbor Laboratory. Here are the latest preprint articles (which are not peer-reviewed) from BioRxiv and MedRxiv.