Dormancy studies in seed of Avena fatua. 7. The effects of light and variation in water regime on germination

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Abstract
Light can regulate the germination of seeds of Avena fatua L. In low volumes of water, seeds are inhibited by white light and in high volumes they are promoted, when compared to seeds in darkness. Blue, red, and far-red light also inhibited germination of seeds in low volumes of water; in high volumes of water there were no differences between these three bands of light and darkness. Degree of dormancy and presence or absence of hulls and of gibberellin all interacted with water status of the caryopsis and light to modify germination. Suppression of germination by white light induced a concomitant reduction in the rate of increase of water potential in these seeds compared with similar seeds germinated in darkness.

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