Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)

Sanders, William B.; Moe, Richard L.; Ascaso, Carmen

Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)

9 páginas, ilustraciones y tablas estadísticas

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Bibliographic Details
Main Authors:	Sanders, William B., Moe, Richard L., Ascaso, Carmen
Format:	artículo biblioteca
Language:	English
Published:	Taylor & Francis 2005
Subjects:	Brown algae, Marine lichen, Petroderma maculiforme, Phacophyocac, Physodes, Plastid, Pyrenoid, Symbiosis,
Online Access:	http://hdl.handle.net/10261/46815
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spelling	dig-ica-es-10261-468152019-08-06T09:52:13Z Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina) Sanders, William B. Moe, Richard L. Ascaso, Carmen Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis 9 páginas, ilustraciones y tablas estadísticas A comparative TEM study was carried out on the phaeophyte Petroderma maculiforme, collected from San Francisco Bay both as free-living thalli and as phycobiont of the lichen fungus Verrucaria tavaresiae. The free-living alga usually had thicker cell walls and substantially greater reserves in storage bodies than the lichenized form. Cell division patterns were altered in symbiosis, and formation of zoosporangia was not observed on the lichenized filaments. Both free-living and lichenized Petroderma showed an abundance of densely osmiophilic deposits associated with vesicles, which were interpreted as physodes; Golgi and ER appeared to be involved in the elaboration of their contents. Plastids of both free-living and lichenized forms possessed a large pyrenoid deeply penetrated by tubular invaginations of the plastidial membranes. This pyrenoid was often enfolded by lobes of the plastid as previously reported, but also commonly occurred as a broad-based protrusion from the surface of the plastid. Smaller, exserted pyrenoids with a very narrow base and no tubular invaginations were sometimes also observed on plastids of the lichenized alga, but were not seen on those of free-living thalli. The significance of this variation in pyrenoid type was not clear. The considerable variation in pyrenoid position and form in P. maculiforme suggests that the protruding, enfolded, and stellate pyrenoid positions known in brown algae are not profoundly different from each other developmentally. Peer reviewed 2012-03-09T08:03:37Z 2012-03-09T08:03:37Z 2005 artículo http://purl.org/coar/resource_type/c_6501 European Journal of Phycology 0967-0262 http://hdl.handle.net/10261/46815 10.1080/09670260500342696 en http://dx.doi.org/10.1080/09670260500342696 none Taylor & Francis
institution	ICA ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-ica-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICA España
language	English
topic	Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis
spellingShingle	Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis Sanders, William B. Moe, Richard L. Ascaso, Carmen Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
description	9 páginas, ilustraciones y tablas estadísticas
format	artículo
topic_facet	Brown algae Marine lichen Petroderma maculiforme Phacophyocac Physodes Plastid Pyrenoid Symbiosis
author	Sanders, William B. Moe, Richard L. Ascaso, Carmen
author_facet	Sanders, William B. Moe, Richard L. Ascaso, Carmen
author_sort	Sanders, William B.
title	Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
title_short	Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
title_full	Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
title_fullStr	Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
title_full_unstemmed	Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)
title_sort	ultrastructural study of the brown alga petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus verrucaria tavaresiae (ascomycotina)
publisher	Taylor & Francis
publishDate	2005
url	http://hdl.handle.net/10261/46815
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Ultrastructural study of the brown alga Petroderma maculiforme (phaeophyceae) in the free-living state and in lichen symbiosis with the intertidal marine fungus Verrucaria tavaresiae (Ascomycotina)

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