Vischeria stellata (Eustigmatophyceae): ultrastructure of the zoospores,with special reference to the flagellar apparatus |
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Authors: | Lilia M A Santos G F Leedale |
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Institution: | (1) Department of Pure and Applied Biology, University of Leeds, Leeds;(2) Instituto Botânico, Universidade de Coimbra, P-3049 Coimbra Codex, Portugal |
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Abstract: | Summary Ultrastructure of the zoospores ofVischeria stellata (R. Chodat ex Poulton) Pascher is investigated, with particular reference to the system of flagellar roots. Microtubular roots and a rhizoplast are present and a model showing their distribution is proposed. Four microtubular roots attach to the basal bodies in a system basically similar to that displayed by the heterokont algae and fungi. The rhizoplast is also similar to that of other heterokont algae. We conclude from these observations that the class Eustigmatophyceae should be placed within the division Heterokontophyta.Abbreviations C
chloroplast
- B
basal body of the emergent flagellum
- B'
second basal body
- E
eyespot
- F
emergent flagellum
- FS
flagellar swelling
- LV
lamellate vesicle
- M
mastigonemes
- MTs
microtubules
- N
nucleus
- R 1–R 4
microtubular roots
- Rh
rhizoplast
- SB
striated band
- SV
spiral vesicle |
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Keywords: | Flagellar roots Eustigmatophyceae Heterokontophyta Vischeria Zoospores |
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