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- W2066084186 abstract "SUMMARYThe fine structure of the biflagellate gametes of Collinsiella cava (Yendo) Printz was investigated in detail to clarify the species's taxonomic and phylo-genetic position. Gametes are covered by small square scales with no distinct substructure. The chloroplast of the gamete includes an eyespot comprised of two layers of globules, and a pyrenoid that is traversed by one or a few thylakoids. Basal bodies overlap at their proximal ends and are offset in a counterclockwise orientation. Each basal body has a small bipartite terminal cap, a prominent proximal sheath comprised of two unequal subunits and a circular element situated at the cartwheel portion. A distal fibre, a connecting fibre and linkage between proximal sheaths connect the two basal bodies. Microtubular roots are comprised of two dexter (d) roots, subtended by the system I fibre, and two sinister (s) roots. Gametes have a single rhizoplast which extends parallel to one of the two d roots and extends to the mating structure. The ultrastructure of Collinsiella gametes is very similar to that of Mono-stroma and other members of the Ulotrichales, Ulvophyceae, and we concluded that the genus Collinsiella should be treated as a member of the Monostromat-aceae. The planozygote has four basal bodies, eight microtubular roots and two eyespots always situated at the same face of the cell. From observations of the planozygotes, the position of the mating structure relative to the flagellar apparatus is not consistent, but converse, between two mating types. A comparison of the location of the mating structure in Chlamydomonas and other green algae is presented." @default.
- W2066084186 created "2016-06-24" @default.
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- W2066084186 date "2000-06-15" @default.
- W2066084186 modified "2023-10-16" @default.
- W2066084186 title "Ultrastructure of the biflagellate gametes of Collinsiella cava (Ulvophyceae, Chlorophyta)" @default.
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- W2066084186 doi "https://doi.org/10.1046/j.1440-1835.2000.00186.x" @default.
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