Regulation of seed dormancy in <i>Elaeagnus angustifolia</i> by endogenous growth substances

Abstract

A coumarin-like germination inhibitor was found in the endocarp, testa, and embryo of dormant seed of Elaeagnus angustifolia L. Activity of the inhibitor did not decrease during 90 days at 5 °C. However, evidence showed that the inhibiting substance may be physiologically effective in preventing germination of dormant seed. A growth-promoting substance formed during low-temperature afterripening apparently reverses the effect of the endogenous inhibitor.