DEVELOPMENT OF HALF-EGGS OF CHAETOPTERUS PERGAMENTACEUS WITH SPECIAL REFERENCE TO PARTHENOGENETIC MEROGONY
DEVELOPMENT OF HALF-EGGS OF CHAETOPTERUS PERGAMENTACEUS WITH SPECIAL REFERENCE TO PARTHENOGENETIC MEROGONY
复制标题
半卵的发育与孤雌生殖的特殊参考
DOI：
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发表时间：
1939
期刊：
影响因子：
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通讯作者：
E. B. Harvey
中科院分区：
文献类型：
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作者：
E. B. Harvey
1. 未受精卵（94µ）可在离心力作用下分层并破碎成大小均匀的不相等的两半。细胞核白色半部分（83µ）含有油脂、透明层、线粒体和少量蛋黄。非核黄色半部分（64µ）只含有蛋黄。与正常未离心的卵子类似，离心后的全卵可以发育成受精卵和孤雌卵。已经注意到某些特点。白色的两半，无论是受精的还是孤雌的，都可以按照典型的环节动物模式分裂。但有一种趋势，即先有相等的分裂和变形虫形态，然后发育成不规则细胞和大细胞核；囊胚倾向于融合在一起；这些特点在孤雌生殖的植株中比在受精的白色植株中更为明显。黄色的那一半，无论是受精的（=受精的）还是孤雌生殖的（=孤雌生殖的），通常都能脱去一个典型的有凹槽的受精膜，只穿过…
1. The unfertilized Chaetopterus egg (94 µ) may be stratified and broken into unequal halves of a uniform size by centrifugal force. The nucleate white halves (83 µ) contain oil, clear layer, mitochondria and a little yolk. The non-nucleate yellow halves (64 µ) contain only yolk.2. The centrifuged whole egg may develop, both fertilized and parthenogenetic, similarly to the normal uncentrifuged egg. Certain peculiarities have been noted.3. The white halves, both fertilized and parthenogenetic, may cleave according to the typical annelid pattern. But there is a tendency toward equal first cleavage and amoeboid form and later, development with irregular cells and large nuclei; the blastulae tend to fuse together; these peculiarities are much more pronounced in the parthenogenetic than in the fertilized white halves.4. The yellow halves, both fertilized (= fertilized merogone) and parthenogenetic (= parthenogenetic merogone) usually lift off a characteristic fluted fertilization membrane and pass through only...