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Budeguer,C.J; Camadro,E.L; Erazzú,L.E. |
Stevia rebaudiana (Bertoni) Bertoni (2n=2x=22) (Asteraceae family) is a species of economic value due to the presence of steviol glycosides in leaves -mainly stevioside and rebaudioside A- which are non-caloric sugars. In 2013, a collection of plants (genotypes) from four contrasting environments was established in Tucuman, Argentina, for evaluation under local conditions and, eventually, breeding purposes. As a first step, pollen viability and meiosis was studied in a sample of 56 plants. The percentage of pollen viability varied from medium (69.4%) to high (99.6%) in 52 of them, but from low (36.5%) to relatively low (51.5%) in the remaining four. The latter four plants also presented pollen grains of heterogeneous size, which were classified as n... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stevia; Pollen viability; Meiosis; Sporads. |
Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332018000200005 |
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Menone,M.L; Pérez,D.J; Lukaszewicz,G; Camadro,E.L. |
Con el objeto de explorar el uso de hidrofitas en ensayos de genotoxicidad de contaminantes acuaticos, como complemento o reemplazo del uso tradicional y estandarizado de macrofitas terrestres (Allium cepa (L.), Pisum sativum (L.), Tradescantia sp., entre otras), se llevo a cabo un estudio preliminar en un intento por seleccionar al menos una especie taxonomica silvestre dulceacuicola que debe cumplir los siguientes requisitos: poseer numero cromosomico basico bajo, indice mitotico (IM) elevado y ser facil de propagar en laboratorio. Para tal fin, se realizaron tres campanas de relevamiento de vegetacion en la Laguna La Brava (provincia de Buenos Aires, Argentina). Se recolectaron semillas de las especies mas representativas, y se dispusieron en placas de... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrofitas acuaticas nativas; Numero cromosomico basico; Indice mitotico; Bioensayos citogeneticos; Genotoxicidad. |
Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332015000100002 |
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