Ontogenesis, structure and ultrastructure of Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) colleters
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad de Costa Rica
2006
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| _version_ | 1876436032124092416 |
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| author | Silvia Rodrigues Machado |
| author_facet | Silvia Rodrigues Machado |
| contents | Ontogenesis, structure and ultrastructure of Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) colleters Silvia Rodrigues Machado Élder Antônio Sousa Paiva Biología stipule colleter secretion ultrastructure Cerrado vegetation The genus Hymenaea is characterized by a great diversity of secretory structures, but there are noreports of colleters yet. The objectives of this study are to report the occurrence and describe the origin andstructure of colleters in Hymenaea stigonocarpa Mart. ex Hayne. Shoot apex samples were collected, fixed,and processed for light microscopy, scanning electron microscopy, and transmission electron microscopy asper usual methods. Colleters occur predominantly on the stipule´s adaxial side. These structures are found atthe base on a narrow strip, corresponding to the median vein up to half the length of the stipule. When presenton the abaxial side, they are concentrated at the base and restricted to the margins. Colleters develop from theprotoderm; they are elongate and club-shaped. Their body has no stratification; their surface cells differ fromthe inner cells only in position and presence of cuticle. Colleter cells have thin walls, dense cytoplasm, largenuclei, many mitochondria, rough endoplasmic reticulum, and abundant dictyosomes. Histochemical tests withRuthenium red showed pectic compounds in the cytosol. In H. stigonocarpa, colleter arrangement is compatiblewith the hypothesis that they protect shoot apex. In this species, protection is reinforced by the sheath formedby the stipule pairs 2006 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44954327 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.54 |
| format | Artículo científico |
| id | redalyc_44954327 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Ontogenesis, structure and ultrastructure of Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) colleters Silvia Rodrigues Machado Biología stipule colleter secretion ultrastructure Cerrado vegetation Ontogenesis, structure and ultrastructure of Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) colleters Silvia Rodrigues Machado Élder Antônio Sousa Paiva Biología stipule colleter secretion ultrastructure Cerrado vegetation The genus Hymenaea is characterized by a great diversity of secretory structures, but there are noreports of colleters yet. The objectives of this study are to report the occurrence and describe the origin andstructure of colleters in Hymenaea stigonocarpa Mart. ex Hayne. Shoot apex samples were collected, fixed,and processed for light microscopy, scanning electron microscopy, and transmission electron microscopy asper usual methods. Colleters occur predominantly on the stipule´s adaxial side. These structures are found atthe base on a narrow strip, corresponding to the median vein up to half the length of the stipule. When presenton the abaxial side, they are concentrated at the base and restricted to the margins. Colleters develop from theprotoderm; they are elongate and club-shaped. Their body has no stratification; their surface cells differ fromthe inner cells only in position and presence of cuticle. Colleter cells have thin walls, dense cytoplasm, largenuclei, many mitochondria, rough endoplasmic reticulum, and abundant dictyosomes. Histochemical tests withRuthenium red showed pectic compounds in the cytosol. In H. stigonocarpa, colleter arrangement is compatiblewith the hypothesis that they protect shoot apex. In this species, protection is reinforced by the sheath formedby the stipule pairs 2006 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44954327 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.54 |
| title | Ontogenesis, structure and ultrastructure of Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) colleters |
| topic | Biología stipule colleter secretion ultrastructure Cerrado vegetation |
| url | https://www.redalyc.org/articulo.oa?id=44954327 |