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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >SEQUENTIAL DEPOSITION OF PLANT GLYCOPROTEINS AND POLYSACCHARIDES AT THE HOST-PARASITE INTERFACE OF UROMYCES VIGNAE AND VIGNA SINENSIS - EVIDENCE FOR ENDOCYTOSIS AND SECRETION
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SEQUENTIAL DEPOSITION OF PLANT GLYCOPROTEINS AND POLYSACCHARIDES AT THE HOST-PARASITE INTERFACE OF UROMYCES VIGNAE AND VIGNA SINENSIS - EVIDENCE FOR ENDOCYTOSIS AND SECRETION

机译：在酵母菌和维格纳菌的寄主-寄生界面处植物糖蛋白和多糖的顺序沉积-记录和分泌的证据

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Monokaryotic haustoria (M-haustoria) of Uromyces vignae in Vigna sinensis cells are surrounded by an extrahaustorial matrix (ema) and the invaginated host plasmalemma, the extrahaustorial membrane (ehm). The ema was characterized with antibodies against components of the plant cell wall; the ema contained hydroxyproline-rich glycoproteins and arabinogalactans/arabinogalactan proteins, both at a higher concentration close to the ehm. Haustoria with large vacuoles had the ema encased by additional layers. An electron-translucent inner layer deposited on top of the ema contained arabinogalactans/arabinogalactan proteins, hydroxyproline-rich glycoproteins, and callose. The inner layer was surrounded by an electron-translucent middle layer with numerous dark inclusions, rich in pectin and fucose bound to xyloglucans. Finally, a more electron-dense outer layer containing arabinogalactans/arabinogalactan proteins and hydroxyproline-rich glycoproteins encased the whole structure. These polysaccharides, with the exception of callose and un-esterified pectin, were also found in the plant Golgi apparatus. The polysaccharides were synthesized in the trans Golgi cisternae and secreted into the host-parasite interface. The secretory events seem to be coupled to endocytosis since numerous coated pits were found on the ehm too. The pits were elongated, sometimes formed tubules and the coat reacted with an antibody against plant clathrin. Our results suggest intensive membrane recycling around haustoria, together with the secretion of cell wall material, which in the case of more or less vacuolated haustoria seems to be responsible for encasement [References: 44]
机译：Vigna sinensis细胞中的黑麦草单胞菌（M-haustoria）被一个排外基质（ema）和侵入的宿主质膜，排外膜（ehm）包围。用针对植物细胞壁成分的抗体表征ema。 ema含有富含羟脯氨酸的糖蛋白和阿拉伯半乳聚糖/阿拉伯半乳聚糖蛋白，两者的浓度都接近于ehm。带有大液泡的Haustoria的ema被其他层包裹。沉积在ema顶部的半透明电子内层包含阿拉伯半乳聚糖/阿拉伯半乳聚糖蛋白，富含羟脯氨酸的糖蛋白和call。内层被透明的电子半透明层包围，中间有许多深色夹杂物，富含果胶和岩藻糖与木葡聚糖结合。最后，包含阿拉伯半乳聚糖/阿拉伯半乳聚糖蛋白和富含羟脯氨酸的糖蛋白的电子密度更高的外层包裹了整个结构。除了call糖和未酯化的果胶外，这些多糖还存在于植物高尔基体中。多糖在反式高尔基水箱中合成，并分泌到宿主-寄生虫界面中。分泌事件似乎与胞吞作用有关，因为在母羊身上也发现了许多包被的凹坑。凹坑被拉长，有时形成小管，并且被膜与针对植物网格蛋白的抗体反应。我们的结果表明，在haushaus周围膜的大量回收以及细胞壁物质的分泌，在或多或少的空化haustoria的情况下，似乎是包裹的原因[参考文献：44]

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