Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications.
Yacon (Smallanthus sonchifolius, Asteraceae) is an ancient andean crop that has numerous dietary and medicinal properties. Morphological and anatomical features and developmental changes of the capitulum were studied. A ray floret is a pistillate, female flower, while a disc floret is a staminate ma...
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| Format: | Artículo |
| Language: | Inglés |
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Springer Verlag
2019
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| Subjects: | |
| Online Access: | https://link.springer.com/article/10.1007/s10265-017-0904-x http://hdl.handle.net/20.500.12123/4847 https://doi.org/10.1007/s10265-017-0904-x |
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| author | Ibañez, María Silvina Mercado, María Inés Coll Araoz, Maria Victoria Zannier, Martín L. Grau, A. Ponessa, Graciela I. |
| author_browse | Coll Araoz, Maria Victoria Grau, A. Ibañez, María Silvina Mercado, María Inés Ponessa, Graciela I. Zannier, Martín L. |
| author_facet | Ibañez, María Silvina Mercado, María Inés Coll Araoz, Maria Victoria Zannier, Martín L. Grau, A. Ponessa, Graciela I. |
| author_sort | Ibañez, María Silvina |
| collection | INTA Digital |
| description | Yacon (Smallanthus sonchifolius, Asteraceae) is an ancient andean crop that has numerous dietary and medicinal properties. Morphological and anatomical features and developmental changes of the capitulum were studied. A ray floret is a pistillate, female flower, while a disc floret is a staminate male flower, and the former opens before the latter, being pseudanthium protogynous. The capitulum presents interesting attributes for pollinators such as flower structure, nectaries and pollenkitt. Gynoecial nectaries were found on undeveloped ovary in the disc floret, but not in the ray floret. Glandular trichomes were observed on the abaxial epidermis of corolla in the ray floret, but not in the disc floret. Capitulum development was divided into eight stages. Stigma receptivity varied with these stages. Pollen viability was low (15%). In accordance with low viability, pollen grains exhibit diverse sizes and shapes, reduction in length of spines, and abnormal protoplasm. Examination of ovary development in the ray floret showed that a mature ovule was formed, but fertilization did not occur. In advanced developmental stages, the capitulum showed proliferation of the endothelium, degeneration of the embryo sac, and all harvested cypselae had aborted seeds. Problems found in pollen viability and aborted cypselae could be the result of a history of vegetative propagation in the domestication process. |
| format | Artículo |
| id | INTA4847 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Springer Verlag |
| publisherStr | Springer Verlag |
| record_format | dspace |
| spelling | INTA48472020-07-15T12:10:03Z Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. Ibañez, María Silvina Mercado, María Inés Coll Araoz, Maria Victoria Zannier, Martín L. Grau, A. Ponessa, Graciela I. Anatomía de la Planta Capítulo Órganos Reproductivos Vegetales Asteraceae Etapas de Desarrollo de la Planta Plant Anatomy Capitulum Plant Reproductive Organs Plant Developmental Stages Yacon (Smallanthus sonchifolius, Asteraceae) is an ancient andean crop that has numerous dietary and medicinal properties. Morphological and anatomical features and developmental changes of the capitulum were studied. A ray floret is a pistillate, female flower, while a disc floret is a staminate male flower, and the former opens before the latter, being pseudanthium protogynous. The capitulum presents interesting attributes for pollinators such as flower structure, nectaries and pollenkitt. Gynoecial nectaries were found on undeveloped ovary in the disc floret, but not in the ray floret. Glandular trichomes were observed on the abaxial epidermis of corolla in the ray floret, but not in the disc floret. Capitulum development was divided into eight stages. Stigma receptivity varied with these stages. Pollen viability was low (15%). In accordance with low viability, pollen grains exhibit diverse sizes and shapes, reduction in length of spines, and abnormal protoplasm. Examination of ovary development in the ray floret showed that a mature ovule was formed, but fertilization did not occur. In advanced developmental stages, the capitulum showed proliferation of the endothelium, degeneration of the embryo sac, and all harvested cypselae had aborted seeds. Problems found in pollen viability and aborted cypselae could be the result of a history of vegetative propagation in the domestication process. EEA Balcarce Fil: Ibañez M.S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce, Argentina. Fil: Mercado M.I. Fundación Miguel Lillo. Instituto de Morfología Vegetal, Tucumán, Argentina. Fil: Coll Aráoz, María Victoria. Fil: Coll Araoz, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentina. Universidad Nacional de Tucumán. Facultad Ciencias Naturales e Instituto Miguel Lillo; Argentina. Fil: Zannier, Martín L. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Instituto de Ecología; Argentina. Fil: Grau, A. Universidad Nacional de Tucumán. Facultad Ciencias Naturales e Instituto Miguel Lillo; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales. Instituto de Ecología. Argentina Fil: Ponessa, Graciela I. Fundación Miguel Lillo. Instituto de Morfología Vegetal, Tucumán, Argentina 2019-04-09T10:57:55Z 2019-04-09T10:57:55Z 2017-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://link.springer.com/article/10.1007/s10265-017-0904-x http://hdl.handle.net/20.500.12123/4847 0918-9440 1618-0860 https://doi.org/10.1007/s10265-017-0904-x eng info:eu-repo/semantics/restrictedAccess application/pdf Springer Verlag Journal of Plant Research 130 (2) : 327-337 (Marcg 2017) |
| spellingShingle | Anatomía de la Planta Capítulo Órganos Reproductivos Vegetales Asteraceae Etapas de Desarrollo de la Planta Plant Anatomy Capitulum Plant Reproductive Organs Plant Developmental Stages Ibañez, María Silvina Mercado, María Inés Coll Araoz, Maria Victoria Zannier, Martín L. Grau, A. Ponessa, Graciela I. Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title | Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title_full | Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title_fullStr | Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title_full_unstemmed | Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title_short | Flower structure and developmental stages of the capitulum of Smallanthus sonchifolius (Asteraceae): reproductive implications. |
| title_sort | flower structure and developmental stages of the capitulum of smallanthus sonchifolius asteraceae reproductive implications |
| topic | Anatomía de la Planta Capítulo Órganos Reproductivos Vegetales Asteraceae Etapas de Desarrollo de la Planta Plant Anatomy Capitulum Plant Reproductive Organs Plant Developmental Stages |
| url | https://link.springer.com/article/10.1007/s10265-017-0904-x http://hdl.handle.net/20.500.12123/4847 https://doi.org/10.1007/s10265-017-0904-x |
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