Physiological Importance of Changes in Endogenous Hormones During Red Oak Acorn Stratification
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.
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Document Type: Journal Article
Affiliations: Associate Professor, Department of Forestry, Ohio. Agricultural Research and Development Center, Wooster, Ohio
Publication date: 1974-06-01
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