%0 Journal Article
%T Caracterizaci車n del indumento de nueve especies de Loasaceae de Venezuela Indument characterization of nine Loasaceae species from Venezuela
%A Eliana Noguera-Savelli
%A Damelis J芍uregui
%A Thirza Ruiz-Zapata
%J Revista mexicana de biodiversidad
%D 2009
%I Instituto de Biolog赤a
%X En este trabajo se caracteriz車 el indumento observado en diferentes 車rganos de 9 especies de Loasaceae presentes en Venezuela, precisando su ubicaci車n en la planta a fin de establecer una posible importancia taxon車mica. Este estudio se efectu車 tanto al microscopio 車ptico como al microscopio electr車nico de barrido. El indumento est芍 constituido por 2 clases de ap谷ndices epid谷rmicos: tricomas y emergencias. Los tricomas se clasificaron en tricomas eglandulares uni-y multicelulares y tricomas glandulares multicelulares. Los tricomas c車nicos y gloquidiados uncinados son comunes en todas las especies estudiadas. Nasa result車 el g谷nero con la mayor diversidad de tricomas. Se registra por primera vez la presencia de tricomas dendr赤ticos, exclusivamente en Nasa venezuelensis. Las hojas y ovarios son los 車rganos que mayor variedad de ap谷ndices mostraron. Gronovia scandens fue la 迆nica especie con emergencias, restringidas a los tallos. La morfolog赤a del indumento es un car芍cter de valor diagn車stico a nivel de subfamilia, lo cual se evidencia en la clave. In this work the epidermal indumentum observed in different organs of 9 species of Loasaceae from Venezuela were characterized, emphasizing their type and location on the plant to establish their possible taxonomic significance. The indumentum was studied using optical and scanning electron microscopy. Two classes of indumentum were observed: trichomes and emergences. The trichomes were classified as uni- and multicellular, non-glandular trichomes, and multicellular glandular trichomes. The conical and uncinate glochidiate trichomes were common in all the species studied. Nasa was the genus with the greatest trichomes diversity. The occurrence of dendritic trichomes is reported for the first time, exclusively in Nasa venezuelensis. Leaves and ovaries are the organs with the greatest variety of appendices. Gronovia scandens is the only species with emergences, which are restricted to the stems. The morphology of the epidermal appendices is a character with diagnostic value at the subfamily level, which is demonstrated in the key.
%K emergencias
%K Gronovia
%K Klaprothia
%K Mentzelia
%K Nasa
%K tricomas
%K emergences
%K Gronovia
%K Klaprothia
%K Mentzelia
%K Nasa
%K trichomes
%U http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1870-34532009000300017