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首页> 外文期刊>Cell and Tissue Research >The digestive system of the stony coral Stylophora pistillata
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The digestive system of the stony coral Stylophora pistillata

机译：石质珊瑚风罗拉发球菌的消化系统

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Because hermatypic species use symbiotic algal photosynthesis, most of the literature in this field focuses on this autotrophic mode and very little research has studied the morphology of the coral's digestive system or the digestion process of particulate food. Using histology and histochemestry, our research reveals that Stylophora pistillata's digestive system is concentrated at the corals' peristome, actinopharynx and mesenterial filaments (MF). We used in-situ hybridization (ISH) of the RNA transcript of the gene that codes for the S. pistillata digestive enzyme, chymotrypsinogen, to shed light on the functionality of the digestive system. Both the histochemistry and the ISH pointed to the MF being specialized digestive organs, equipped with large numbers of acidophilic and basophilic granular gland cells, as well as acidophilic non-granular gland cells, some of which produce chymotrypsinogen. We identified two types of MF: short, trilobed MF and unilobed, long and convoluted MF. Each S. pistillata polyp harbors two long convoluted MF and 10 short MF. While the short MF have neither secreting nor stinging cells, each of the convoluted MF display gradual cytological changes along their longitudinal axis, alternating between stinging and secreting cells and three distinctive types of secretory cells. These observations indicate the important digestive role of the long convoluted MF. They also indicate the existence of novel feeding compartments in the gastric cavity of the polyp, primarily in the nutritionally active peristome, in the actinopharynx and in three regions of the MF that differ from each other in their cellular components, general morphology and chymotrypsinogen excretion.
机译：由于癫痫型物种使用共生藻类光合作用，因此该领域的大多数文献侧重于这种自养模式，并且非常几乎没有研究珊瑚消化系统的形态或颗粒食物的消化过程。我们的研究使用组织学和组织化学，我们的研究表明，Tuthophora Pistillata的消化系统集中在珊瑚的植物，Actinopharynx和肠系膜细丝（MF）。我们使用原位杂交（ISH）的基因的RNA转录物，该基因的RNA转录物代码为S.pistillata消化酶，胰凝乳细胞引起的梭菌化合物，脱光对消化系统的功能。组织化学和ISH均指向MF是专门的消化器官，配备大量的嗜酸性和嗜碱性粒细胞，以及嗜酸性非颗粒状腺细胞，其中一些产生胰凝乳蛋白酶原。我们确定了两种类型的MF：短，Trilobed MF和Uniloved，Long和Compoluted MF。每个S. Pistillata息肉Harbors两个长的复杂的MF和10短MF。虽然短MF既没有分泌或刺痛细胞，但是沿着它们的纵向轴线显示逐渐显示逐渐细胞学变化，在刺痛和分泌细胞和三种独特的分泌类型之间交替。这些观察结果表明了长期复杂的MF的重要消化作用。他们还表明在息肉的胃腔中的新喂养室的存在，主要是在营养活性蠕动中，在肌动癣菌中，并且在其细胞成分中彼此不同，一般形态和胰凝乳细胞排泄。

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