Cytokinesis of the Pollen-mother-cells of Certain Dicotyledons by Clifford Harrison FarrCytokinesis of the Pollen-mother-cells of Certain Dicotyledons by Clifford Harrison Farr

Cytokinesis of the Pollen-mother-cells of Certain Dicotyledons

byClifford Harrison Farr

Paperback | February 8, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1916 Excerpt: ... kinesis of higher plants, the assumption has become general that such a structure is universally present in angiosperms, gymnosperms, ferns, and bryophytes. Strasburger already in 1875 discussed the formation of the plate by fusion of thickenings on the central spindle-fibers, its splitting to form the boundaries of the daughter-cells, and the secretion of the cellulose wall or walls between the new daughter-cell boundaries. Strasburger's views have been critically confirmed and enlarged by Treub for the orchids, Mottier for the mother-cells of the lily, Hof for the roottips of Ephedra, Pteris, and Vicia, Nemec for Allium, and Timberlake for the root-tips of Allium and for the pollen mother-cells of the larch. In addition to this critical work there has appeared in the literature a vast number of more or less casual statements corroborating this interpretation with regard to the cells of various representatives of nearly all groups of the higher plants. Apparently in only one instance has a serious attempt been made to question the universal occurrence of cell-plate formation in the cytokinesis of higher plants, namely, the work of Baranetsky (4) in 1880 which has not been recognized as presenting such an exception to this rule, doubtless chiefly because it does not furnish the positive proof of how division may be accomplished without a cell-plate. On the other hand, it has been just as carefully established that the animal cell divides without the formation of a cell-plate in the equator of the central spindle. Flemming's attempt to homologize the "zwischenkorper" of certain animal cells with the cell-plate of plants has not been generally accepted. The "zwischenkorper" has not been shown to play any part in the formation of the new plasma membranes, wher...
Title:Cytokinesis of the Pollen-mother-cells of Certain DicotyledonsFormat:PaperbackDimensions:26 pages, 9.69 × 7.44 × 0.05 inPublished:February 8, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217817742

ISBN - 13:9780217817745