%0 Journal Article
%T Domacios y nectarios extraflorales en Bignoni¨¢ceas: componentes vegetales de una interacci¨®n mutual¨ªstica Domatia and extrafloral nectaries in Bignoniaceae: two components of a mutualistic interaction
%A Ana M Gonzalez
%J Bolet¨ªn de la Sociedad Argentina de Bot¨¢nica
%D 2011
%I Sociedad Argentina de Bot¨¢nica
%X Las plantas presentan relaciones mutual¨ªsticas con insectos a cambio del control de sus herb¨ªvoros u hongos pat¨®genos; por medio de los domacios les ofrecen albergue y mediante la secreci¨®n de n¨¦ctar de nectarios extraflorales les brindan alimento. Se examin¨® la anatom¨ªa foliar en 52 especies de Bignoniaceae con microscop¨ªa ¨®ptica y electr¨®nica de barrido, con el objetivo de describir los domacios y los nectarios extraflorales. Los domacios presentes son de dos tipos: mechones de pelos y bolsillos, siendo un car¨¢cter taxon¨®mico ¨²til en varias especies. Los nectarios extraflorales se encuentran en todas las especies, ubic¨¢ndose en diversas posiciones: a lo largo de la vena media, asociados a los domacios o agrupados en campos glandulares, que pueden ser foliares o interpeciolares. Las Bignoniaceae presentan simult¨¢neamente domacios y nectarios extraflorales en sus hojas, los cuales se describen como componentes vegetales de un probable mecanismo de defensa indirecta. Plants have mutualistic relationships with insects in two ways: through domatia provide housing of predators, and extrafloral nectaries secreting nectar and provide food in exchange for control of herbivores or fungal pathogens. The foliar anatomy of 52 species of Bignoniaceae was examined by light and scanning electron microscopy, in order to describe the different types of domatia and extrafloral nectaries. Two types of domatia were observed: small hair-tufts and pockets; the presence and type of domatia represents important taxonomic characters in Bignoniaceae. Extrafloral nectaries are found in all studied species. They are located in different positions: along the midvein, associated with domatia, or grouped in glandular fields, either in leaf or interpetiolar. The Bignoniaceae have simultaneously domatia and extrafloral nectaries on their leaves, these features are described as plant components in a probable mechanism of indirect defense.
%K Anatom¨ªa
%K Bignoniaceae
%K Campos glandulares
%K Domacios
%K Hojas
%K Nectarios extraflorales
%K Anatomy
%K Bignoniaceae
%K Domatia
%K Extrafloral nectaries
%K Glandular fields
%K Leaf
%U http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722011000200007