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ZmELF6-ZmPRR37 module regulates maize flowering and salt response.

Huihui SuLiru CaoZhenzhen RenWenhao SunBingqi ZhuShixiang MaChongyu SunDongling ZhangZhixue LiuHaixia ZengWenjing YangYingpeng LiuLingling ZhengYuwei YangZhendong WuYingfang ZhuLixia KuLeelyn ChongYanhui Chen
Published in: Plant biotechnology journal (2023)
The control of flowering time in maize is crucial for reproductive success and yield, and it can be influenced by environmental stresses. Using the approaches of Ac/Ds transposon and transposable element amplicon sequencing techniques, we identified a Ds insertion mutant in the ZmPRR37 gene. The Ds insertion showed a significant correlation with days to anthesis. Further research indicated that ZmPRR37-CR knockout mutants exhibited early flowering, whereas ZmPRR37-overexpression lines displayed delayed flowering compared to WT under long-day (LD) conditions. We demonstrated that ZmPRR37 repressed the expression of ZmNF-YC2 and ZmNF-YA3 to delay flowering. Association analysis revealed a significant correlation between flowering time and a SNP2071-C/T located upstream of ZmPRR37. The SNP2071-C/T impacted the binding capacity of ZmELF6 to the promoter of ZmPRR37. ZmELF6 also acted as a flowering suppressor in maize under LD conditions. Notably, our study unveiled that ZmPRR37 can enhance salt stress tolerance in maize by directly regulating the expression of ABA-responsive gene ZmDhn1. ZmDhn1 negatively regulated maize salt stress resistance. In summary, our findings proposed a novel pathway for regulating photoperiodic flowering and responding to salt stress based on ZmPRR37 in maize, providing novel insights into the integration of abiotic stress signals into floral pathways.
Keyphrases
  • arabidopsis thaliana
  • genome wide
  • transcription factor
  • poor prognosis
  • dna methylation
  • stress induced
  • gene expression
  • cell proliferation
  • copy number
  • heat stress
  • drug delivery
  • high density
  • climate change
  • human health