The Induction of Light Sensitivity in Weed Seeds by Burial

摘要: Seeds of a number weed species were buried in soil for period 50 weeks. At the end this was disturbed under controlled illumination. In three germination appeared to be unaffected by light, prior burial. Following burial, however, took place only suggesting induction light sensitivity. eight other species, which showed varying degrees sensitivity when fresh seeds examined, germination, follow ing completely dependent upon exposure light. Seed has also been shown inhibited burial labora tory conditions. The extent inhibition is depth and water content medium. Experiments using artificial aeration indicate that it presence gaseous inhibitor atmosphere prevents germination. This appears arise from themselves not carbon dioxide.