期刊
EUROPEAN JOURNAL OF PHYCOLOGY
卷 49, 期 4, 页码 395-412出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09670262.2014.949308
关键词
Interfilum; Klebsormidium; molecular phylogeny; morphological characters; sporulation-like type of cell division; Streptophyta; ultrastructure
资金
- Alexander von Humboldt Foundation
- INTAS [06-1000014-6216]
- Deutsche Forschungsgemeinschaft (DFG) [KA899/16-1/2/3/4]
- FWF [P24242-B16]
- Austrian Science Fund (FWF) [P24242] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 24242] Funding Source: researchfish
Representatives of the closely related genera, Interfilum and Klebsormidium, are characterized by unicells, dyads or packets in Interfilum and contrasting uniseriate filaments in Klebsormidium. According to the literature, these distinct thallus forms originate by different types of cell division, sporulation (cytogony) versus vegetative cell division (cytotomy), but investigations of their morphology and ultrastructure show a high degree of similarity. Cell walls of both genera are characterized by triangular spaces between cell walls of neighbouring cells and the parental wall or central space among the walls of a cell packet, exfoliations and projections of the parental wall and cap-like and H-like fragments of the cell wall. In both genera, each cell has its individual cell wall and it also has part of the common parental wall or its remnants. Therefore, vegetative cells of Interfilum and Klebsormidium probably divide by the same type of cell division (sporulation-like). Various strains representing different species of the two genera are characterized by differences in cell wall ultrastructure, particularly the level of preservation, rupture or gelatinization of the parental wall surrounding the daughter cells. The differing morphologies of representatives of various lineages result from features of the parental wall during cell separation and detachment. Cell division in three planes (usual in Interfilum and a rare event in Klebsormidium) takes place in spherical or short cylindrical cells, with the chloroplast positioned perpendicularly or obliquely to the filament (dyad) axis. The morphological differences are mainly a consequence of differing fates of the parental wall after cell division and detachment. The development of different morphologies within the two genera mostly depends on characters such as the shape of cells, texture of cell walls, mechanical interactions between cells and the influence of environmental conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据