Fine structure of the phylogenetically important marine alga Rhodogorgon carriebowensis (Rhodophyta, Batrachospermales?)
Protoplasma, ISSN: 0033-183X, Vol: 166, Issue: 1-2, Page: 78-88
1992
- 8Citations
- 6Captures
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Article Description
The fine structure of the recently described red alga Rhodogorgon carriebowensis J. Norris et Bucher was studied by light microscopy and scanning and transmission electron microscopy to aid in the ordinal placement of this unusual alga. Most significant in this context were findings that pit plugs had two-layered plug caps, the outer layer of which formed a large dome and was composed of glycoprotein. Cap membranes appeared to be absent. Medullary cells were remarkable in having extremely thick, layered cell walls, whose inward deposition left little room for cytoplasm. Medullary filaments branched little except near the base of the cortex. The assimilatory filaments that made up most of the cortex contained almost all the pigmentation and starch reserves of the thallus. These filaments terminated in either slender apical cells with smooth cell walls or bulbous apical cells bearing spinulose projections. Two types of elongated cells were found in the cortex, those with calcified cell walls and those surrounded by multiple, spreading layers of wall material. Neither cell type was pigmented. The latter type sometimes supported normal assimilatory cells. The hypothesis is proposed that Rhodogorgon is a descendant of the marine progenitors of the Batrachospermales and thus is a member of this order. © 1992 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0002487239&origin=inward; http://dx.doi.org/10.1007/bf01320146; http://link.springer.com/10.1007/BF01320146; http://www.springerlink.com/index/pdf/10.1007/BF01320146; http://link.springer.com/content/pdf/10.1007/BF01320146; http://link.springer.com/content/pdf/10.1007/BF01320146.pdf; http://link.springer.com/article/10.1007/BF01320146/fulltext.html; https://dx.doi.org/10.1007/bf01320146; https://link.springer.com/article/10.1007/BF01320146; http://www.springerlink.com/index/10.1007/BF01320146
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