ETHREL FOR BREAKING DORMANCY IN SEEDS OF SOME WOODY PLANTS1
David F. Hamilton
Seeds of some woody plants were treated with (2-chloroethyl) phosphonic acid (Ethrel) to determine if ethylene would replace the cold requirement for germination. In the first phase of the experiment, seeds were soaked without a cold treatment in Ethrel solutions and in the second phase seeds were soaked after a cold treatment.
Soaking seeds in Ethrel increased germination of most species, although the effective concentration and length of treatment varied among species. A cold treatment in addition to the soak in Ethrel did not further increase germination.
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