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Proteomic changes during tuber dormancy release process revealed by iTRAQ quantitative proteomics in potato.

Bailin Liu1, Ning Zhang2, Shuo Zhao3

  • 1Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Genetic and Germplasm Enhancement, Gansu Agricultural University, Lanzhou 730070, People's Republic of China; College of Agronomy, Gansu Agricultural University, Lanzhou 730070, People's Republic of China.

Plant Physiology and Biochemistry : PPB
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Summary
This summary is machine-generated.

This study analyzed tuber dormancy release proteome, identifying key protein changes during dormancy breaking. These findings reveal metabolic shifts from growth suspension to activation, crucial for understanding tuber development.

Keywords:
DormancyPotato tuberProteomeSproutingiTRAQ

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Area of Science:

  • Plant Biology
  • Proteomics
  • Molecular Biology

Background:

  • Tuber dormancy release is a critical developmental process.
  • Limited proteomic data exists for tuber dormancy release.

Purpose of the Study:

  • To investigate the proteome dynamics during tuber dormancy release.
  • To identify differentially expressed proteins and their functions.

Main Methods:

  • Proteome analysis using iTRAQ technology.
  • Comparison of protein expression at dormant (DT), dormancy release (DRT), and sprouting (ST) stages.

Main Results:

  • Identified 1,752 proteins, with significant up- and down-regulation between stages.
  • Key metabolic pathways like carbohydrate metabolism, glycolysis, and protein metabolism were altered.
  • Down-regulation of photosynthesis and RNA-related proteins observed during dormancy release.

Conclusions:

  • Proteomic changes indicate a metabolic shift from growth suspension to activation during tuber dormancy breaking.
  • Discrepancies between protein and transcript levels suggest transcriptional and posttranscriptional regulation.
  • The study provides insights into tuber dormancy release mechanisms involving metabolism, signaling, and stress response.