THE ULTRASTRUCTURE OF THE GASTRODERMAL GLAND-CELLS IN THE FRESH-WATER PLANARIAN DUGESIA-GONOCEPHALA SL
THE ULTRASTRUCTURE OF THE GASTRODERMAL GLAND-CELLS IN THE FRESH-WATER PLANARIAN DUGESIA-GONOCEPHALA SL
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DOI：
10.1111/j.1463-6395.1986.tb00848.x
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发表时间：
1986-01-01
期刊：
影响因子：
1.2
通讯作者：
GAMO, J
中科院分区：
文献类型：
--
作者：
GARCIACORRALES, P;GAMO, J
用光镜和透射电镜观察了三鳃鳗腹真皮细胞的超微结构转变和分泌过程，并在禁食和摄食动物的四个不同阶段进行了观察。在摄食阶段，它们的分泌颗粒通过全息分泌型的分泌过程直接排入肠腔，本文将对其进行描述。这表明，这些分泌物有助于细胞外消化和分解，而腺体细胞的分解伴随着新生细胞向新的腺体细胞的分化，反映了腺体细胞在三体消化阶段的周转。
Light and transmission electron microscopy have been used to study the gastrodermal gland cells of the triclad Dugesia gonocephala s.l. The events involved in the ultrastructural transformation and the secretion process in these cells were followed at four different stages in both fasted and fed animals. During the feeding stage their secretory granules are directly discharged into the intestinal lumen by means of a secretion process of the holocrine type that is described in this paper. It is suggested that such secretions contribute to extracellular digestion and that disintegration and that disintegration of the gland cells is accompanied by a differentiation of neoblasts into new gland cells, reflecting a turnover of gland cells during the triclad digestive stages.