Presumptive ciliated receptors associated with the fibrillar glands of the spines of the echinoderm Amphipholis squamata
Presumptive ciliated receptors associated with the fibrillar glands of the spines of the echinoderm Amphipholis squamata
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假定的纤毛受体与棘皮动物 Amphipholis squamata 棘的纤维腺有关
DOI：
10.1007/bf00216433
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发表时间：
2004
影响因子：
3.6
通讯作者：
R. Emson
中科院分区：
文献类型：
--
作者：
P. Whitfield;R. Emson
摘要本文描述了海蛇尾（Amphipholis squamata）臂棘的角质层、纤维腺体和stäbchen（见Reichensperger 1908）的超微结构。Stäbchen显示为角质层突起，其中通过一个或多个单联细胞质过程。纤毛的近端以不同的程度突出到外部环境中。有证据表明这些纤毛末梢是感觉神经的末梢。因此，Stäbchen被认为具有受体功能。Stäbchen细胞群在空间上与脊柱两侧的纤维腺开口相连，而纤维腺细胞的基部则与来自脊柱神经的轴突接触，轴突上布满了直径45-270 nm、电子密集、膜结合的颗粒。在纤维腺分泌物被认为是作为食物捕获粘液的假设的背景下，讨论了这些关系的可能功能意义。
SummaryThe ultrastructure of the cuticle, fibrillar glands and stäbchen (see Reichensperger 1908) of the arm spines of the brittle star Amphipholis squamata are described. Stäbchen are shown to be cuticular projections into which pass one or more uniciliate cytoplasmic processes. The proximal tips of the cilia protrude into the external environment to a variable extent. Evidence is presented for considering these ciliated endings to be the terminations of sensory neuntes. Stäbchen are, in consequence, presumed to have a receptor function.Groups of Stäbchen are spatially associated with fibrillar gland openings on the sides of spines while the bases of fibrillar gland cells are in contact with axons from the spine nerve which are laden with 45–270 nm diameter, electron-dense, membrane-bounded granules. The possible functional significance of these relationships is discussed in the context of a hypothesis in which fibrillar gland secretions are considered to act as food-catching mucus.