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Morphology and life history studies of Scytosiphon lomentaria (Scytosiphonaceae, Phaeophyceae) from the Azores
Parente, M.I.; Neto, A.I.; Fletcher, R.L. (2003). Morphology and life history studies of Scytosiphon lomentaria (Scytosiphonaceae, Phaeophyceae) from the Azores. J. Phycol. 39: 353-359
In: Journal of Phycology. Blackwell Science: New York. ISSN 0022-3646; e-ISSN 1529-8817, meer
Peer reviewed article  

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  • Parente, M.I.
  • Neto, A.I., meer
  • Fletcher, R.L.

    Morphological and culture studies ofScytosiphonlomentaria(Lyngbye) Link andMicrospongium gelatinosumReinke (Scytosiphonaceae, Phaeophyceae) wereundertaken on material collected on the Island of SãoMiguel, Azores, where both species were commonlyfound. Erect thalli ofS. lomentariacollected in thefield were up to 33 cm long and 2.3 mm wide, tubular,hollow, and commonly constricted at intervals.The plurilocular sporangia were positioned in continuoussori on the thallus surface. Ascocysts werepresent. In the field,M. gelatinosumformed crustoseto slightly pulvinate plants, were spongy in texture,and dark brown to black in color, which were circularor irregularly spreading over several centimetersand firmly attached to the substratum. Sessile unilocularsporangia were located in sori on the crust surface.In cultureS. lomentariaplurispores developedintoMicrospongium-like crustose prostrate thalli thatformed unilocular sporangia. Unispores developedinto new erect thalli that formed plurilocular sporangia.Sexual reproduction was not observed. In culture,M. gelatinosumunispores developed into erectthalli identical withS. lomentaria.These results aresimilar to those reported for other areas and suggestthe occurrence in the Azorean plants of a monophasicand heteromorphic life history, involving both entitiesstudied.

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