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DC Field | Value | Language |
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dc.contributor.author | Carmona, Javier | - |
dc.contributor.author | Montejano, Gustavo | - |
dc.contributor.author | Necchi Júnior., Orlando | - |
dc.date.accessioned | 2014-05-27T11:21:52Z | - |
dc.date.accessioned | 2016-10-25T18:22:13Z | - |
dc.date.available | 2014-05-27T11:21:52Z | - |
dc.date.available | 2016-10-25T18:22:13Z | - |
dc.date.issued | 2006-06-01 | - |
dc.identifier | http://dx.doi.org/10.1111/j.1440-1835.2006.00417.x | - |
dc.identifier.citation | Phycological Research, v. 54, n. 2, p. 108-115, 2006. | - |
dc.identifier.issn | 1322-0829 | - |
dc.identifier.issn | 1440-1835 | - |
dc.identifier.uri | http://hdl.handle.net/11449/68897 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/68897 | - |
dc.description.abstract | The morphology and phenology of Sirodotia huillensis was evaluated seasonally in a central Mexican first-order calcareous stream. Water temperature was constant (24-25°C) and pH circumneutral to alkaline (6.7-7.9), and calcium and sulfates were the dominant ions. The gametophyte stages were characterized by the presence of a distinctive mucilaginous layer, a marked difference in phycocyanin to phycoerythrin ratio between female and male plants, and the presence of a carpogonia with a large trichogyne (>60 μm). Occasionally three capogonia were observed on a single basal cell. The 'Chantransia' stages were morphologically similar to those described for the other members of Batrachospermales. A remarkable observation was the formation of dome-shaped structures, consisting of prostrate filaments that are related with the development of new gametophytes. Chromosome numbers were n = 4 for fascicle cells, cortical filament cells and dome-shaped cells, and 2n = 8 for gonimoblast filament cells and 'Chantransia' stage filaments. Gametophytes and 'Chantransia' stages occurred in fast current velocities (60-170 cm/s) and shaded (33.1-121 μmol photons/m2/s) stream segments. The population fluctuated throughout the study period in terms of percentage cover and frequency: the 'Chantransia' stages were most abundant in the rainy season, whereas gametophytic plants had the highest frequency values during the dry season. These results were most likely a result of fluctuations in rainfall and related changes in current velocity. Some characteristics of this population can be viewed as probable adaptations to high current velocities: the mucilaginous layer around plants that reduces drag; potential increase in fertilization by the elongate and plentiful trichogynes and abundant dome-shaped structures producing several gametophytes. | en |
dc.format.extent | 108-115 | - |
dc.language.iso | eng | - |
dc.source | Scopus | - |
dc.subject | 'Chantransia' stages | - |
dc.subject | Batrachospermales | - |
dc.subject | Ecology | - |
dc.subject | Gametophyte | - |
dc.subject | Morphology | - |
dc.subject | Rhodophyta | - |
dc.subject | Sirodotia huillensis | - |
dc.subject | Stream | - |
dc.subject | gametophyte | - |
dc.subject | morphology | - |
dc.subject | phenology | - |
dc.subject | red alga | - |
dc.subject | water temperature | - |
dc.subject | Mexico [Mexico (NTN)] | - |
dc.subject | Mexico [North America] | - |
dc.subject | North America | - |
dc.subject | Chantransia | - |
dc.subject | Trichogyne | - |
dc.title | Ecology and morphological characterization of gametophyte and 'Chantransia' stages of Sirodotia huillensis (Batrachospermales, Rhodophyta) from a stream in central Mexico | en |
dc.type | outro | - |
dc.contributor.institution | Universidad Nacional Autónoma del México (UNAM) | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.description.affiliation | Faculty of Sciences National Autonomous University of Mexico (UNAM) Ciudad Universitaria, México DF | - |
dc.description.affiliation | Saõ Paulo State University Zoology and Botany Department, Sao Jose do Rio Preto, SP | - |
dc.identifier.doi | 10.1111/j.1440-1835.2006.00417.x | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Phycological Research | - |
dc.identifier.scopus | 2-s2.0-33745947048 | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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