INVESTIGADORES
FERRUCCI Maria silvia
artículos
Título:
Pollen morphology in selected species of Caricaceae with special reference to novel palynological characters
Autor/es:
ZINI, L.M.; CARRERA, C.S.; LATTAR E.C.; FERRUCCI, MAR√ćA SILVIA
Revista:
BOTANY
Editorial:
NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
Referencias:
Lugar: Otawa; Año: 2018 vol. 96 p. 1 - 8
ISSN:
1916-2790
Resumen:
The pollen grain morphology of Jacaratia corumbensisKuntze, J. spinosa (Aubl.) A. DC., Vasconcellea quercifolia A. St.-Hil., andCarica papaya L. from Argentine samples were examined for the first time, usinglight and scanning electron microscopes. Observations and measurements wereperformed on acetolyzed pollen grains. Principal components analysis wasperformed for quantitative morphological variables. Pollen grains weretri-colporate with lalongate endoaperture, oblate spheroidal to prolate,medium, exine bireticulate or reticulate, with a granulate lumina. A fastigiumwas present. Novel palynological data in this study for species identificationrevealed the presence of margo in C. papaya and variations in endoapertureshapes in all the species. The endoaperture ends often were H-shaped orhorn-shaped. A biplot showed clear separation of the four taxa based on thepalynological traits. Vasconcellea quercifolia was strongly correlated withequatorial diameter, equatorial diameter in polar view, exine thickness, andpolar diameter, whereas J. corumbensis and J. spinosa were positivelycorrelated with polar index and polar area index, respectively. The distancebetween two colpi allowed the discrimination of C. papaya. We confirmed the homogenousnature for most of the qualitative palynological characters in Caricaceae, anddemonstrated that pollen morphology in combination with statistical analyses isa reliable tool for delimiting taxonomic groups.