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Physiological Importance of Changes in Endogenous Hormones During Red Oak Acorn Stratification

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Abstract:

Physiological effects of stratification on seed dormancy of northern red oak (Quercus rubra L.) were studied. Hormonal changes during stratification included isomerization and then disappearance of a compound similar to (±)-abscisic acid, concurrent with an increase in gibberellin-like compounds. Various cutting and soaking treatments were applied to unstratified seeds. Some successfully simulated stratification effects by promoting germination but only if the pericarp had been removed. These studies suggest that red oak seed dormancy is imposed by ABA-like inhibitors contained in the embryo. With stratification, the germination inhibitors are biochemically altered, diluted or leached, and antagonized by increasing levels of gibberellins. Forest Sci. 20:187-191.

Keywords: Quercus rubra; abscisic acid; dormancy; gibberellins; pericarp

Document Type: Journal Article

Affiliations: Associate Professor, Department of Forestry, Ohio. Agricultural Research and Development Center, Wooster, Ohio

Publication date: June 1, 1974

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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