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Related Experiment Videos

Changes in ABA and gene expression in cold-acclimated sugar maple.

A Bertrand1, G Robitaille, Y Castonguay

  • 1Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, P.O. Box 3800, Sainte-Foy, Québec G1V 4C7, Canada.

Tree Physiology
|January 1, 1997
PubMed
Summary

Cold acclimation in sugar maple seedlings involves specific gene expression and translation changes in buds and roots. Abscisic acid (ABA) levels increase, potentially regulating these cold hardening modifications.

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Area of Science:

  • Plant Physiology
  • Molecular Biology
  • Forest Science

Background:

  • Sugar maple (Acer saccharum) seedlings undergo cold acclimation for winter survival.
  • Understanding the molecular mechanisms of cold hardening is crucial for forest resilience.

Purpose of the Study:

  • To investigate gene expression and translation alterations during natural cold acclimation in sugar maple.
  • To explore the role of abscisic acid (ABA) in mediating cold hardening.

Main Methods:

  • Comparison of translatable mRNAs and protein synthesis in cold-acclimated versus unhardened buds and roots.
  • Measurement of freezing tolerance (LT50) and xylem sap ABA concentration.

Main Results:

  • Cold acclimation induced specific transcript synthesis and increased abundance in buds.

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  • Translation products were also altered in cold-acclimated buds and roots.
  • Xylem sap ABA concentration increased significantly during winter acclimation.

    • Conclusions:

    • Cold hardening in sugar maple is associated with significant changes in gene expression and translation.
    • Abscisic acid (ABA) may play a key role in regulating these molecular adaptations to cold stress.