Descrição palinotaxômica de angiospermas do herbário Jayme Coelho de Moraes (EAN) para implementação de uma palinoteca.

Abstract

Grains of pollen are characterized by numerous morphological patterns, with wide implication in taxonomic, diversity and paleoecological studies. In the Northeast there is the necessity for new Palinotheques to contribute to the study of their diversity and plant composition, which are collections of pollen grains and spores. The objective of this study was to describe the pollen grains of Angiosperm species preserved in Jayme Côelho de Moraes Herbarium (EAN)-CCA/Campus II-UFPB exsiccates, aiming at the implementation of a Palinotheque of reference. The acetolysis process was carried out in 52 species, including eight type specimens, 22 species from Mata do Pau Ferro State Park and five from other Northeastern locations. Pollen grains of 35 species, representing 30 genera and 22 families were recovered and described, being Fabaceae the most representative in the collection. Amongst the morphological characters studied, exine sculpture was relevant in pollen differentiation due to the variety of ornamentation. The absence of pollen material of some species may be related to temporal factors, the process of herborization and the exine fragility of some plant groups to acetolysis, being necessary adaptations of the palynological study method to herbariums. Ease of collection, specific pollen description of species and level of preservation of pollen grains make exsiccates excellent instruments for palynological studies. Therefore, Palinotheque at CCA/UFPB will offer a larger quantity of scientific content, constituting itself as a new work instrument.