Dormancy studies in seed of Avena fatua. 12. Influence of temperature on germination behavior of nondormant families

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Abstract
Experiments are reported which clarify the influence of temperature on dormancy of seed of A. fatua. Temperature treatments administered at 2 stages of the life cycle, during seed development (stage 1) and during the period immediately following seed maturation (stage 2), influence the duration of dormancy in all familes (pure lines) so far investigated. There is evidence for induction of thermodormancy by relatively high incubation temperatures. This effect is most evident in seed which experienced relatively low temperatures during maturation. The significance of dormancy in the adaptation of nondormant families is discussed.