Dormancy and Impotency of Cocklebur Seeds VIII. Lack of Germination Responsiveness in Primarily Dormant Seeds to Cyanide, Azide, Anoxia and Chilling

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Abstract
Germination responsiveness to KCN, NaN3, chilling or anoxia and respiration activity was compared between non-after-ripened and after-ripened upper cocklebur (Xanthium pennsylvanicum Wallr.) seeds. The latter, coat-imposed dormant seeds, could germinate in response to the above chemicals and conditions, whereas the former, primarily dormant seeds, could not respond. There was little difference in the respiratory properties of both types of seeds.