Arabidopsis NAC transcription factor JUNGBRUNNEN1 affects thermomemory-associated genes and enhances heat stress tolerance in primed and unprimed conditions.
We recently reported that the NAC transcription factor JUNGBRUNNEN1 (JUB1; ANAC042) extends longevity and increases tolerance to heat stress in Arabidopsis thaliana when overexpressed, while the opposite is observed in jub1-1 knock-down lines. Here we extend our previous findings by demonstrating that JUB1 also positively regulates plant survival under heat stress when plants were treated by a prior moderate (and non-lethal) temperature regime (so-called priming). We further find that JUB1 shows thermomemory-related expression, similar to two other genes previously reported to be important for thermopriming, i.e., HSFA2, encoding a heat shock factor, and HSA32, encoding a heat shock protein. Our analysis also identifies ASCORBATE PEROXIDASE2 (APX2) and the heat shock protein genes HSP18.2 and HSP21 as thermomemory-expressed genes, revealing them as new candidates for studies to decode the molecular processes controlling thermopriming.
University of Potsdam, Institute of Biochemistry and Biology, Potsdam-Golm, Germany.
Sara
S
Shahnejat-Bushehri
Bernd
B
Mueller-Roeber
Salma
S
Balazadeh
D017360:Arabidopsis / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D060387:Ascorbate Peroxidases / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000235:genetics / Q000502:physiology; D000076249:Heat Shock Transcription Factors; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism; D018869:Heat-Shock Response / Q000235:genetics / Q000502:physiology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
D029681:Arabidopsis Proteins; D004268:DNA-Binding Proteins; C000620134:HSFA2 protein, Arabidopsis; C489905:HSP18 protein, plant; C400143:HSP21 protein, Arabidopsis; D000076249:Heat Shock Transcription Factors; D006360:Heat-Shock Proteins; C511729:Hsa32 protein, Arabidopsis; D010940:Plant Proteins; D014157:Transcription Factors; C555293:APX2 protein, Arabidopsis; D060387:Ascorbate Peroxidases