DEVELOPMENTAL STUDIES ON THE LORICATE CHOANOFLAGELLATE STEPHANOECA-DIPLOCOSTATA ELLIS .1. ULTRASTRUCTURE OF THE NON-DIVIDING CELL AND COSTAL STRIP PRODUCTION

被引:47
作者
LEADBEATER, BSC
机构
[1] Department of Plant Biology, University of Birmingham, Birmingham, B15 2TT
关键词
D O I
10.1007/BF01281442
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Cells of Stephanoeca diplocostata comprise a colourless, flagellated, protoplast lodged in a lorica made of siliceous costae. The single anterior flagellum creates a water current from which bacteria and other food particles are filtered by the collar and ingested by linguiform pseudopodia that arise from the protoplast at the base of the collar. A waist divides the lorica into two chambers, the anterior of which contains three transverse and 17-20 longitudinal costae whereas the posterior chamber comprises two systems of spirally deflected costae and on some cells a pedicel at the hind end. Between 150-185 costal strips of similar length form the lorica. A thin investment covers the inner surface of the posterior chamber and lower part of the anterior chamber and joins with the protoplast at the level of the waist. Costal strips are produced within membrane-bounded vesicles in the peripheral cytoplasm and, although the origin of these vesicles is unknown, there is usually a close association with the Golgi apparatus. Once complete, strips are apparently released sideways through the plasmalemma into the cavity of the posterior lorica chamber. Later, bundles of strips are transferred to the top of the inner surface of the collar where they collectively form a horizontal ring. When sufficient strips to form a lorica have been accumulated at the top of the collar, cell division proceeds. © 1979 Springer-Verlag.
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页码:241 / 262
页数:22
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  • [1] Boucaud-Camou E., 1967, B SOC LINN NORMANDIE, V10, P191
  • [2] COOMBS J, 1968, Z PFLANZENPHYSIOL, V59, P274
  • [3] OBSERVATIONS ON STRUCTURE OF SOME FORMS OF GOMPHONEMA-PARVULUM KUTZ .3. FRUSTULE FORMATION
    DAWSON, PA
    [J]. JOURNAL OF PHYCOLOGY, 1973, 9 (04) : 353 - 365
  • [4] Ellis W.N., 1929, ANN SOC ROY ZOOL BEL, V60, P49
  • [5] Hedley R.H., 1974, Bulletin Br Mus nat Hist (Zool), V26, P187
  • [6] HEDLEY R H, 1973, Bulletin of the British Museum (Natural History) Zoology, V25, P119
  • [7] HIBBERD DJ, 1978, J PHYCOL, V13, P309
  • [8] HIBBERD DJ, 1974, J CELL SCI, V17, P191
  • [9] LAVAL M, 1971, Protistologica, V7, P325
  • [10] LEADBEATER B S C, 1973, Archiv fuer Protistenkunde, V115, P234