Formación de pelos en el alga agarófita Gracilaria chilensis(Gracilariales, Rhodophyta)
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Instituto de Botánica Darwinion
2007
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| author | Maximiliano D. Garcia |
| author_facet | Maximiliano D. Garcia |
| contents | Formación de pelos en el alga agarófita Gracilaria chilensis(Gracilariales, Rhodophyta) Maximiliano D. Garcia Alicia B. Miravalles Patricia I. Leonardi Biología hair Gracilaria Rhodophyta ultrastructure Florideophyceae Gracilaria chilensis (Gracilariales) is an agarophyte red alga belonging to class Florideophyceae.The purpose of this study was to describe the hair formation mechanism. Thalli were maintained inculture with enriched seawater under controlled conditions of light and temperature. Hair formationwas induced on portions of thalli growing in a nitrogen-free culture medium. Light (bright field)microscopy, transmission and scanning electron microscopy techniques were used. Hairs develop fromlarge ovoid hair-producing cortical cells (HPCs). These cells are multinucleate, contain small plastids,and abundant endoplasmic reticulum apically positioned. Each hair begins as a protuberance initiallycovered by a multilaminar wall, this is, in turn, ruptured along with the thallus wall as the protuberanceelongates. Hairs are formed when cytokinesis occurs at the base of the protuberance. An asymmetricpit plug is formed between the hair`s base and the HPC. Hairs are unicellular, with a vacuole andnumerous nuclei. They have an active growth, and leave a concentric scar on the wall after detachment.Hair formation mechanism in G. chilensis is also compared with that observed in other speciesof the same class. In nitrogen-free culture media, the thallus of G. chilensis grows less, but the numberof hairs increases. 2007 artículo científico 0011-6793 https://www.redalyc.org/articulo.oa?id=66945101 en http://www.redalyc.org/revista.oa?id=669 Darwiniana application/pdf Instituto de Botánica Darwinion Darwiniana (Argentina) Num.1 Vol.45 |
| format | Artículo científico |
| id | redalyc_66945101 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Instituto de Botánica Darwinion |
| spellingShingle | Formación de pelos en el alga agarófita Gracilaria chilensis(Gracilariales, Rhodophyta) Maximiliano D. Garcia Biología hair Gracilaria Rhodophyta ultrastructure Florideophyceae Formación de pelos en el alga agarófita Gracilaria chilensis(Gracilariales, Rhodophyta) Maximiliano D. Garcia Alicia B. Miravalles Patricia I. Leonardi Biología hair Gracilaria Rhodophyta ultrastructure Florideophyceae Gracilaria chilensis (Gracilariales) is an agarophyte red alga belonging to class Florideophyceae.The purpose of this study was to describe the hair formation mechanism. Thalli were maintained inculture with enriched seawater under controlled conditions of light and temperature. Hair formationwas induced on portions of thalli growing in a nitrogen-free culture medium. Light (bright field)microscopy, transmission and scanning electron microscopy techniques were used. Hairs develop fromlarge ovoid hair-producing cortical cells (HPCs). These cells are multinucleate, contain small plastids,and abundant endoplasmic reticulum apically positioned. Each hair begins as a protuberance initiallycovered by a multilaminar wall, this is, in turn, ruptured along with the thallus wall as the protuberanceelongates. Hairs are formed when cytokinesis occurs at the base of the protuberance. An asymmetricpit plug is formed between the hair`s base and the HPC. Hairs are unicellular, with a vacuole andnumerous nuclei. They have an active growth, and leave a concentric scar on the wall after detachment.Hair formation mechanism in G. chilensis is also compared with that observed in other speciesof the same class. In nitrogen-free culture media, the thallus of G. chilensis grows less, but the numberof hairs increases. 2007 artículo científico 0011-6793 https://www.redalyc.org/articulo.oa?id=66945101 en http://www.redalyc.org/revista.oa?id=669 Darwiniana application/pdf Instituto de Botánica Darwinion Darwiniana (Argentina) Num.1 Vol.45 |
| title | Formación de pelos en el alga agarófita Gracilaria chilensis(Gracilariales, Rhodophyta) |
| topic | Biología hair Gracilaria Rhodophyta ultrastructure Florideophyceae |
| url | https://www.redalyc.org/articulo.oa?id=66945101 |