| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Carmona, Javier | |
| dc.creator | Montejano, Gustavo | |
| dc.creator | Necchi Júnior., Orlando | |
| dc.date | 2014-05-27T11:21:52Z | |
| dc.date | 2016-10-25T18:22:13Z | |
| dc.date | 2014-05-27T11:21:52Z | |
| dc.date | 2016-10-25T18:22:13Z | |
| dc.date | 2006-06-01 | |
| dc.date.accessioned | 2017-04-06T01:18:49Z | |
| dc.date.available | 2017-04-06T01:18:49Z | |
| dc.identifier | Phycological Research, v. 54, n. 2, p. 108-115, 2006. | |
| dc.identifier | 1322-0829 | |
| dc.identifier | 1440-1835 | |
| dc.identifier | http://hdl.handle.net/11449/68897 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/68897 | |
| dc.identifier | 10.1111/j.1440-1835.2006.00417.x | |
| dc.identifier | 2-s2.0-33745947048 | |
| dc.identifier | http://dx.doi.org/10.1111/j.1440-1835.2006.00417.x | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/890206 | |
| dc.description | 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. | |
| dc.language | eng | |
| dc.relation | Phycological Research | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| 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 | |
| dc.type | Otro | |
