THE MECHANISM FOR SYNCHRONOUS SPAWNING IN HYDRACTINIA AND PENNARIA
THE MECHANISM FOR SYNCHRONOUS SPAWNING IN HYDRACTINIA AND PENNARIA
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水螅和佩纳里亚同步产卵机制
DOI：
10.2307/1537979
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发表时间：
1942
期刊：
影响因子：
--
通讯作者：
W. W. Ballard
中科院分区：
文献类型：
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作者：
W. W. Ballard
1.本文报道了在一天中任何所需的时间安排水螅属和水螅属的卵子和精子脱落的方法。这些动物的成熟只有在生殖细胞在黑暗中经历了一段时间的准备之后才发生，并且是由光对生殖细胞的直接作用引发的。一旦在光照下开始，成熟可以在黑暗中进行。不间断的光照或不间断的黑暗会导致成熟和产卵的完全停止。在Hydractinia最大脱落需要至少一个小时的黑暗准备，虽然更少的时间是足够的一些鸡蛋。10秒的光照足以广泛但不是最大的成熟起始。4.假设是先进的黑暗允许光敏感物质的生殖细胞内的积累，其分解启动成熟的过程。从生物体中分离出来的卵母细胞可以通过适当的暗光处理来成熟。卵子和精子同时脱落...
1. Methods are reported for scheduling the shedding of eggs and sperm by Hydractinia and Pennaria at any desired time of day.2. Maturation in these animals occurs only after the germ cells have undergone a period of preparation in the darkness, and is initiated by direct action of light on the germ cells. Once initiated by light, maturation can proceed in the dark. Uninterrupted light, or uninterrupted darkness, results in complete cessation of maturation and spawning.3. In Hydractinia maximum shedding requires at least an hour's darkness-preparation, although less time is sufficient for some eggs. Ten seconds of illumination is sufficient for widespread but not maximum initiation of maturation.4. The hypothesis is advanced that darkness allows the accumulation of light-sensitive substances within the germ cell, whose breakdown initiates the process of maturation. Oocytes dissected free from the organism can be matured by appropriate dark-light treatment.5. Shedding of eggs and sperm takes place simultane...