Pollen morphology, meiotic index and pollen viability in individuals of Vochysia divergens Pohl. native to the Amazon and the Pantanal

Vochysia divergens Pohl. is a tree species used in folk medicine, landscaping and reforestation. Its occurrence recorded the Amazon, Pantanal Cerrado biomes and, despite these uses its wide distribution, studies regarding reproductive aspects are nonexistent. Thus, this research aimed to study morphology of pollen V. evaluate viability meiotic index, as well compare descriptors two natural populations, those Amazon Pantanal. To characterize morphology, grains were subjected acetolysis subsequently photographed, measured classified. The index (MI) was estimated by counting post-meiotic products. Pollen evaluated via colorimetric testing vitro germination. do not differ between populations classified as: large, 3-colporate, isopolar, subprolate, with small exine polar area that has pattern ornamentation perforated region. Via testing, MI greater than 95% only differed populations. germination low it found presence boric acid absence agar positively influence pollens have starch lipids reserve substance. It can therefore be concluded stability, which important effectiveness fertilization generation new individuals for formation generations, thus continuing processes forest restoration maintenance genetic variability. information obtained support taxonomic, paleoclimatic paleovegetational studies.