Morphogenesis of the digestive tract of the pluteus larva of Strongylocentrotus purpuratus: shaping and bending
Morphogenesis of the digestive tract of the pluteus larva of Strongylocentrotus purpuratus: shaping and bending
复制标题
紫圆甲藻幼虫消化道的形态发生：成形和弯曲
DOI：
10.1080/01651269.1980.10553338
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
R. Burke
中科院分区：
文献类型：
--
作者：
R. Burke
在受精后60~72h(15℃)，食道、胃和肠道3种成分形成其特有的形状。发育中的肠道细胞数量从原肠发育完成时的约100个增加到摄食小管中的约425个。用秋水仙素抑制胞质分裂的胚胎能够形成由大约150个细胞组成的典型形状的肠道。在肠道成形期间，在含有[~3H]胸腺嘧啶核苷的海水中培养的胚胎的放射自显影显示，没有胸腺嘧啶核苷掺入增强的区域。幼虫肠道的形成是由于异速生长细胞增殖区的假设被驳回。对发育中的肠道长度的测量表明，口腔和肛门这两个固定点之间的消化道长度增加了一倍，从而促进了肠道的弯曲。
The 3 elements of the digestive tract of the pluteus larva (esophagus, stomach and intestine) acquire their characteristic shapes between 60 and 72 h after fertilization (15°C). The number of cells in the developing gut increases sigmoidally from about 100 at the completion of gastrulation to about 425 in the feeding pluteus. Embryos in which cytokinesis was inhibited with colchicine were able to form typically shaped guts comprising about 150 cells. Autoradiographs of embryos that had been cultured in sea water containing [3H]thymidine during shaping of the gut indicated no regions of enhanced thymidine incorporation. The hypothesis that shaping of the larval gut is due to regions of allometric cell proliferation was rejected. Measurements of the length of the developing gut indicate that the bending of the gut is facilitated by a doubling of the length of the digestive tract between two fixed points, the mouth and the anus.