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SEPTAL PORE APPARATUS OF THE SMUT USTACYSTIS WALDSTEINIAE

机译:乌节线虫WALDSTEINIAE的毛孔洞装置

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The septal pore apparatus in intercellular hyphae of Ustacystis waldsteiniae was analyzed by serial-section electron microscopy using chemically fixed and high pressure frozen/freeze substituted samples. Septa have a central ''simple'' pore with rounded, non-swollen margins. However, the pore apparatus is a highly complex structure, differing significantly from that found in ''simple''- and complex-septate basidiomycetes. Three features are typical: 1) the pore canal is traversed by two symmetrically arranged bands, 2) a dome shaped membranous cap, intimately attached to the plasma membrane, encloses the pore on both sides, and 3) a thin electron transparent layer and a layer of medium electron density cover the cytoplasmic side of the membranous cap. From our observations of septal pore morphology we suggest a general absence of transport of organelles including ribosomes through the pore. [References: 45]
机译:使用化学固定和高压冷冻/冷冻替代样品,通过连续切片电子显微镜分析了瓦尔氏乳杆菌的胞间菌丝中的间隔孔装置。隔垫有一个中央的“简单”毛孔,边缘呈圆形,不溶胀。然而,孔装置是高度复杂的结构,与“简单”和复杂分隔的担子菌中发现的结构明显不同。典型的三个特征是:1)两条对称排列的带穿过孔管; 2)圆顶形的膜帽,紧密地附着在质膜上,两侧都包围着孔; 3)薄的电子透明层和一个电子密度中等的层覆盖膜帽的细胞质侧。从我们对中间隔孔形态的观察中,我们建议一般不包括细胞核在内的细胞器转运通过核孔。 [参考:45]

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