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PsCor413pm2, a Plasma Membrane-Localized, Cold-Regulated Protein from

Aimin Zhou1, Enhui Liu2, He Li3

  • 1College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China. aiminzhou@neau.edu.cn.

International Journal of Molecular Sciences
|September 12, 2018
PubMed
Summary

Overexpressing the cold-regulated gene PsCor413pm2 from Phlox subulata in Arabidopsis enhanced low temperature tolerance. This improved tolerance is linked to increased calcium (Ca2+) influx and the expression of cold and C-repeat binding factor genes.

Keywords:
Phlox subulataPsCor413pm2cold stresscold-regulated genetransgenic Arabidopsis

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Area of Science:

  • Plant Science
  • Molecular Biology
  • Genetics

Background:

  • Low temperature stress significantly impacts plant growth and development.
  • Understanding cold response mechanisms is crucial for improving crop resilience.
  • Cold-regulated (COR) genes play a vital role in plant adaptation to cold stress.

Purpose of the Study:

  • To investigate the function of the cold-regulated gene PsCor413pm2 from Phlox subulata.
  • To determine if PsCor413pm2 enhances low temperature tolerance in Arabidopsis thaliana.
  • To elucidate the molecular mechanisms underlying PsCor413pm2-mediated cold tolerance.

Main Methods:

  • Gene isolation and transfer of PsCor413pm2 into Arabidopsis.
  • Real-time quantitative PCR for gene expression analysis.
  • Subcellular localization studies using green fluorescent protein (GFP) fusion proteins.
  • Non-invasive micro-test technology (NMT) for calcium (Ca2+) influx measurement.
  • Analysis of COR and C-repeat binding factor (CBF) gene expression.

Main Results:

  • PsCor413pm2 expression was induced by cold temperatures.
  • The PsCor413pm2-GFP fusion protein localized to the plasma membrane.
  • Overexpression of PsCor413pm2 significantly enhanced low temperature tolerance in Arabidopsis.
  • Transgenic Arabidopsis exhibited increased Ca2+ influx in roots under cold shock.
  • Upregulation of COR and CBF genes was observed in transgenic plants under cold stress.

Conclusions:

  • Overexpression of PsCor413pm2 confers enhanced low temperature tolerance in Arabidopsis.
  • The mechanism involves modulation of Ca2+ flux and the expression of downstream stress-responsive genes (COR and CBF).
  • PsCor413pm2 is a valuable gene for improving plant cold hardiness.