| 释义 |
phragmosome Bot.|ˈfrægməʊsəʊm|
[f. as prec. + -some4.]
a. A layer of darker cytoplasm which forms during mitosis in some plant cells at the site of the future cell plate.
b. One of the large number of small particles that form this layer.
1940Sinnott & Bloch in Proc. Nat. Acad. Sci. XXVI. 226 This cytoplasm..tends to become aggregated into a series of strands..which occupies the position of the future wall and which thus indicates..where the plane of the division is to be. For this plate of cytoplasm the writers propose the term phragmosome. 1960Proc. 4th Internat. Conf. Electron Microscopy 505 Other structures of the cytoplasm are consistently associated with the plate... The more obvious of these bodies (phragmosomes) tend to be a uniform distance from the cell plate. Ibid., How these phragmosomes contribute to plate formation is not very clear. 1965Frey-Wyssling & Mühlethaler Ultrastruct. Plant Cytol. 279 During and after the formation of the cell plate osmiophilic particles become evident in the phragmoplast, which can reach light microscopic dimensions and which are known as phragmosomes. 1971Canad. Jrnl. Bot. XLIX. 927 RNA was concentrated in phragmosomes and at the newly formed cell plates. 1976A. W. Davidson in M. M. Yeoman Cell Division in Higher Plants xii. 414 It is changes that occur within this limiting membrane [sc. the plasmalemma] which determine the point at which the phragmosome is formed and hence the position of the new cell wall. |