ULTRASTRUCTURE OF TETRASPOROGENESIS IN THE MARINE RED ALGAPTILOTA HYPNOIDES1
作者:
J. L. Scott,
P. S. Dixon,
期刊:
Journal of Phycology
(WILEY Available online 1973)
卷期:
Volume 9,
issue 1
页码: 29-46
ISSN:0022-3646
年代: 1973
DOI:10.1111/j.0022-3646.1973.00029.x
出版商: Blackwell Science Inc
数据来源: WILEY
摘要:
SUMMARYBoth tetrasporangia and dormant apical cells of short vegetative filaments of the marine red algaPtilota hypnoideshave been examined by electron microscopy. Various cytoplasmic inclusions readily distinguish the vegetative apical cells from the reproductive apical cells which become tetrasporangial mother cells. The transformation of tetrasporangial mother cells into mature tetrasporangia involves a series of cytoplasmic changes which can be correlated with specific changes in the investing wall layers. The extracellular changes provide the basic criteria for the division of tetrasporogenesis into 3 successive stages. The ultrastructure of each stage is described and discussed in relation to the current knowledge of red algal cytology. In addition, a possible mechanism for the liberation of spores and gametes of red algae is proposed.
点击下载:
PDF
(6583KB)
返 回