Effect of Light on Germination of Light-Sensitive Seeds: A Dissertation (Classic Reprint) - Hardcover

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Excerpt from Effect of Light on Germination of Light-Sensitive Seeds<br/><br/>Various explanations have been offered for the germination of light-sensitive seeds, and several conditions have been shown to favor or make possible the germination of such seeds. Rupture of coats, increased water supply, variation of quantity and intensity of light, reciprocal relation of heat and light, reaction of substratum and embryo, activation of enzymes, increased oxygen pressure, increased carbon dioxide pressure, and certain inhibiting agencies have been suggested as factors affecting the germination of light sensitive seeds. Although quite possible, it seems hardly probable that no one of these is the fundamental or controlling factor. It would seem quite probable that one or two of these agencies are fundamental and the others are accessory means of setting in motion the processes that finally bring about germination. Enzyme action has been suggested repeatedly as a fundamental cause of germination, but no one has ventured to demonstrate the relation of enzymes to the germination of light-sensitive seeds. An attempt has been made in this investigation to discover the fundamental relation of light to the germination of seeds, and to show just what light does to start germination. The effect of light on the germination of seeds has interested botanists for many years.

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