Physiological and morphological characterization of american oil palms (elaeis oleifera hbk cortes) and their hybrids (elaeis oleifera × elaeis guineensis) on the indupalma plantation Report as inadecuate




Physiological and morphological characterization of american oil palms (elaeis oleifera hbk cortes) and their hybrids (elaeis oleifera × elaeis guineensis) on the indupalma plantation - Download this document for free, or read online. Document in PDF available to download.



The morphological and photosynthetic activity were characterizedin six genotypes of American oil palm E. oleifera ofdifferent origins and three of their OxG hybrids E. oleifera × E.guineensis with a completely randomized experimental design,three replications and 16 palms per replication. Determinationswere made for: photosynthesis, internal CO2 concentration,chlorophyll content, stomatal openings and density, specific leafarea, and measurements of vegetative growth. The genotypeswere differentiated by growth rate, emission, area and dryweight of the leaves. The stomatal openings of all the genotypeswere maximum in the morning hours, with partial closures atmidday; therefore, the maximum rate of photosynthesis wasbetween 9:00 and 12:00 hr. The ‘Perú’ American oil palm and‘hybrid 2’ Sinú-Coarí × La Mé showed higher CO2 internalconcentrations, total chlorophyll contents, light saturationpoints and photosynthetic rates, even with low levels of photosyntheticallyactive radiation; characteristics that indicatea high capacity for the fixation of CO2. The photosyntheticrate showed a high positive correlation with the chlorophyllcontent and a negative correlation with the specific leaf area.In conclusion, the ‘Perú’ American oil palm showed relevantcharacteristics for use in breeding programs as female parentof OxG hybrids, while ‘hybrid 2’, due to its outstanding morphophysiologicalcharacteristics, is considered a genotype withgood agronomic performance.

Tipo de documento: Artículo - Article

Información adicional: © Facultad de Agronomía, Universidad Nacional de Colombia Se autoriza la reproducción y citación del material que aparece en la revista, siempre y cuando se indique de manera explícita: nombre de la revista, nombre del autores, año, volumen, número y páginas del artículo fuente. Las ideas y afirmaciones consignadas por los autores están bajo su responsabilidad y no interpretan necesariamente las opiniones y políticas de la Universidad Nacional de Colombia. La mención de productos o firmas comerciales en la revista no implica una recomendación o apoyo por parte de la Universidad ni de la Facultad; el uso de tales productos debe ceñirse a las recomendaciones de las etiquetas.

Palabras clave: growth, chlorophyll content, plant breeding, photosynthesis, stomata.





Source: http://www.bdigital.unal.edu.co


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Physiological and morphological characterization of american oil palms (Elaeis oleifera HBK Cortes) and their hybrids (Elaeis oleifera × Elaeis guineensis) on the Indupalma plantation Caracterización fisiológica y morfológica de palmas americanas de aceite (Elaeis oleifera HBK Cortés) y sus híbridos (Elaeis oleifera × Elaeis guineensis) de la plantación Indupalma Yurany Dayanna Rivera M.1, Daniel Gerardo Cayón S.2, and Jesús Edgardo López M.3 ABSTRACT RESUMEN The morphological and photosynthetic activity were characterized in six genotypes of American oil palm (E.
oleifera) of different origins and three of their OxG hybrids (E.
oleifera × E. guineensis) with a completely randomized experimental design, three replications and 16 palms per replication.
Determinations were made for: photosynthesis, internal CO2 concentration, chlorophyll content, stomatal openings and density, specific leaf area, and measurements of vegetative growth.
The genotypes were differentiated by growth rate, emission, area and dry weight of the leaves.
The stomatal openings of all the genotypes were maximum in the morning hours, with partial closures at midday; therefore, the maximum rate of photosynthesis was between 9:00 and 12:00 hr.
The ‘Perú’ American oil palm and ‘hybrid 2’ (Sinú-Coarí × La Mé) showed higher CO2 internal concentrations, total chlorophyll contents, light saturation points and photosynthetic rates, even with low levels of photosynthetically active radiation; characteristics that indicate a high capacity for the fixation of CO2.
The photosynthetic rate showed a high positive correlation with the chlorophyll content and a negative correlation with the specific leaf area. In conclusion, the ‘Perú’ American oil palm showed relevant characteristics for use in breeding programs as female parent of OxG hybrids, while ‘hybrid 2’, due to its outstanding morphophysiological characteristics, is considered a genotype with good agronomic performance...






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