CYTOLOGICAL STUDIES OF OEDOGONIUM. I. OOSPORE GERMINATION IN O. FOVEOLATUM

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Abstract
Details of oospore germination, including meiosis, are described and illustrated as they appear in the homothallic Oedogonium foveolatum. Unequivocal meiotic division is demonstrated to occur within 12 hr prior to the liberation of the motile tetrad cells. The development and liberation of the meiotic products are described as are instances of anomalous oospore germination. In some cases, meiosis apparently fails to occur, and a single, diploid germling invariably results. Various factors influencing oospore germination are discussed, including an apparent absolute light requirement.