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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >The nuclear reticulum in placental cells of Lilium regale is a part of the endomembrane system
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The nuclear reticulum in placental cells of Lilium regale is a part of the endomembrane system

机译：普通百合的胎盘细胞中的网状结构是内膜系统的一部分

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Placental cells line the ovarian transmitting tract in Lilium regale and produce exudates for secretion. Sections through the highly lobed nuclei of these cells reveal the presence of membrane profiles which form vesicles with varying dimensions in cross section. Computer reconstruction of the nucleus reveals that the vesicle profiles form a complex reticulum of tubular cisternae, which spans the whole nucleus, enclosing a maze of continuous lumen space. Connections between the vesicles and the inner nuclear envelope are visible at various points along the nuclear envelope. This complex network of tubules which constitutes the reticulum arises from the inner nuclear membrane. The nuclear reticulum dramatically increases the inner-envelope surface area, comprising 82% of the total membrane perimeter of inner nuclear envelope and nuclear reticulum. The inner nuclear envelope invaginates into the nucleus forming the nuclear reticulum and the outer nuclear envelope evaginates into the endoplasmic reticulum (ER). indicating that there is a continuity between the lumens of the nuclear reticulum and the ER. The nuclear reticulum is labelled with zinc iodide-osmium tetroxide, a staining pattern identical to that seen in the EP. Positive reaction to the zinc iodide-osmium tetroxide indicates that the nuclear reticulum is a site for Ca2+ deposition. The nuclear reticulum forms an extension of the endomembrane system which reaches deep into the nucleoplasm. The lumenal continuity of this system means that there is a channel for communication from the cytoplasm into the nucleoplasm, and that this channel sequesters calcium. [References: 75]
机译：胎盘细胞在普通百合中排成卵巢，并分泌分泌物。通过这些细胞的高度裂片状的核的切片揭示了膜轮廓的存在，该膜轮廓形成了横截面尺寸不同的囊泡。核的计算机重建表明，囊泡轮廓形成了一个复杂的管状水箱网状结构，该网状水箱跨越整个核，包围了连续腔腔的迷宫。在沿核包膜的各个点处可见囊泡与内部核包膜之间的连接。构成网状结构的这种细小管网络来自内核膜。核网显着增加了内部信封的表面积，占内部核被膜和核网总膜周长的82％。内核包膜侵入形成核网的核，而外核包膜则排入内质网（ER）。表明核网腔和ER之间存在连续性。核网标有碘化锌-四氧化os，其染色模式与欧洲专利相同。对碘化锌-四氧化os的正反应表明，核网是Ca2 +沉积的位点。核网形成内膜系统的延伸，延伸到核质深处。该系统的内腔连续性意味着存在从细胞质到核质进行通讯的通道，并且该通道螯合了钙。 [参考：75]

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