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VaEIN3.1-VaERF057-VaFBA1 Module Positively Regulates Cold Tolerance by Accumulating Soluble Sugar in Grapevine.

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Ethylene-responsive transcription factors (ERFs) enhance grapevine cold tolerance. The VaEIN3.1-VaERF057-VaFBA1 pathway boosts soluble sugar content and freezing resistance in plants.

Keywords:
VaERF057VaFBA1cold stressgrapevinesoluble sugar

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Area of Science:

  • Plant Science
  • Molecular Biology
  • Genetics

Background:

  • Ethylene-responsive transcription factors (ERFs) are crucial for plant cold responses.
  • The specific regulatory roles of cold-induced ERFs in grapevine remain largely unknown.
  • Vitis amurensis, a cold-hardy species, presents a model for studying cold tolerance mechanisms.

Purpose of the Study:

  • To elucidate the regulatory mechanism of VaERF057 in grapevine cold response.
  • To identify downstream targets of VaERF057 involved in cold tolerance.
  • To investigate the upstream regulation of VaERF057 by VaEIN3.1.

Main Methods:

  • Gene overexpression and knockdown in Vitis amurensis roots.
  • DAP-seq and transcriptome analysis to identify transcription factor targets.
  • Measurement of soluble sugar content and assessment of freezing tolerance.

Main Results:

  • Overexpression of VaERF057 enhanced freezing tolerance and soluble sugar content.
  • VaFBA1 was identified as a direct downstream target of VaERF057, crucial for cold tolerance.
  • VaEIN3.1 positively regulates VaERF057 expression, contributing to cold acclimation.

Conclusions:

  • The VaEIN3.1-VaERF057-VaFBA1 module plays a significant role in grapevine cold stress response.
  • VaERF057 and its target VaFBA1 are key components in enhancing soluble sugar accumulation and freezing tolerance.
  • VaEIN3.1 acts as an upstream regulator, activating the VaERF057-mediated cold response pathway.