Estudos botânicos nas ilhas de Maiandeua-Algodoal (Pa) - IV. o pólen das famílias anacardiaceae e dilleniaceae da restinga de Algodoal-Pa

Abstract

In the Algodoal sandbank, the families Anacardiaceae and Dilleniaceae are represented by the species Anacardium occidentale L., Anacardium microcarpum Ducke, Tapirira guianensis Aubl., Davilla nitida (Vahl) Kub., Doliocarpus spraguei Cheesman and Tetracera willdenowiana Steud. The objective of this work is to analyze the pollen grains of species from these families for comparison with those of species occurring in other vegetational types. Pollen keys were elaborated with the purpose of separating the investigated species. The morphology of their pollen grains was studied in terms of size, number of openings, shape, and stratification of the exine. Acetolysis was the method used to prepare the slides, whose pollen grains were measured, described and photomicrographed. Those from Anacardiaceae are medium-sized, prolate to subprolate, 3 - colored, with a striated surface and those from Dilleniaceae range from small to medium-sized, subprolate to prolate, with a punctate to reticulate surface. The objective of this work is to analyze the pollen grains of species of these families for comparison with those of species occurring in other vegetational types. Pollen keys were elaborated in order to separate the species investigated.