Valor taxonómico de la micromorfología de la hoja y la fitoquímica cuantitativa de Jatropha integerrima Jacq. y Jatropha podagrica Hook. (Euphorbiaceae)-conocidas plantas hortícolas en NigeriaSe examinó la micromorfología y la fitoquímica cuantitativa de J. integerrima y J. podagrica para para identificar caracteres útiles para la delimitación taxonómica, siguiendo protocolos estandarizados, descritos por autores anteriores. Ambas especies son hipostó-micas (paracíticas). Los tricomas (multicelulares, no glandulares) estaban presentes sólo en la superficie adaxial de J. integerrrima y ausentes en otras superficies epidérmicas. Los análisis fitoquímos también señalaron pequeñas diferencias en la cantidad de compuestos bioactivos presentes en ambas especies. El contenido de fenol es el mayoritario en ambas especies: 37.65% en J. integerrima y 36.13% en J. podagrica. Las semejanzas y diferencias de los caracteres epidérmico-foliares y contenidos fitoquímicos pueden ser empleadas para delimitar taxonomicamente ambas especies.Palabras clave: Jatropha, Microcaracteres, Fitoquímica, Taxonomía. AbstractThe leaf micro-morphology and quantitative phytochemistry of J. integerrima and J. podagrica were examined to find useful characters for the delimitation of taxa, following standard protocols as described by previous authors. Both species are hypostomatic (paracytic). Trichome (multicellular, non-glandular) are only present on the adaxial surface of J. integerrima and absent in other epidermal surfaces. Phytochemical analysis also showed little differences in the amount of bioactive compounds present in both species. Phenol contents are the highest in the two species: 37.65% in J. integerrima and 36.13% in J. podagrica. The similarities and differences in the foliar epidermal characters and phytochemical content can be used to delimit the two studies species, as taxonomic characters.
A systematic study was carried out on Dennettia tripetala to establish an alternative method of propagation and further provide complementary characters for the identification of the species especially in sterile conditions. All methods followed those of previous authors of related studies. Findings from the silvicultural aspect revealed that it is very possible to successfully propagate the species via air-layering, using good quality materials. Top soil performed better than saw dust substrate. The roots appeared and developed much faster than those of the saw dust, before it was harvested and potted. Micro-morphological examination of the foliar epidermises also showed that the species is hypostomatic, while epidermal cells are predominantly polygonal, measuring 37.1 x 22.0 µm and 30.4 x 15.4 µm in size on the abaxial and adaxial surfaces respectively, and with straight to sinose anticlinal walls. Stomata is anomocytic, up to 32.2 x 17.6 µm in size. Wood is vesseless with tyloses present and gums totally absent. Ray multiserate. Pollen grains are predominantly spheroidal with scabrate surface and thin exine. Further studies on other aspects may reveal more useful information about D. tripetala.
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