Triumfetta semitriloba Jacq. (Tiliaceae) is a tropical weedy species with floral nectaries and glands located at the margins of the leaves. The objectives of this work were to describe the anatomy of these secretory structures and to analyze their exudates. Sucrose, glucose, and fructose were identified in the product released by these secretory structures, characterizing them as nectaries. The nectaries of T. ...
Visando avaliar os efeitos do fluoreto sobre capim-braquiária, plantas de Brachiaria brizantha e B. decumbens foram submetidas a nevoeiros simulados com fluoreto (10 µg ml-1). Amostras foliares de porções aparentemente sadias foram coletadas 24 horas após a última exposição para análises microscópicas. Folhas, raízes e rizomas foram submetidos à quantificação do teor de fluoreto. As folhas apresentaram necroses...
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Anatomical and physiological evaluations of the plants species Schinus terebinthifolius (Anacardiaceae), Borreria verticillata (Rubiaceae) and Cajanus cajan (Leguminosae) were carried out following their exposure to arsenic. Anatomical evaluations included: light and scanning electron microscopy characterization; histolocalization of a putative site o...