Palynology of the species of the Vochysia Aubl. Vochysiaceae A.St.-Hil. from Atlantic forest.

Abstract

This work is part of a more comprehensive study of taxonomic review of Vochysia Aubl. from Atlantic forest. The following species have been analyzed: V. angelica Vianna & Fontella, V. bifalcata Warm., V. dardanoi M.C. Vianna & Fontella, V. dasyantha Warm., V. glazioviana Warm., V. gummifera Warm., V. laurifolia Warm., V. lucida C. Presl, V. magnifica Warm., V. oblongifolia Warm., V. oppugnata (Vell.) Warm., V. rectiflora var. glabrescens Warm., V. rectiflora Warm var. rectiflora, V. riedeliana Stafleu, V. saldanhana Warm., V. santaluciae M.C. Vianna & Fontella, V. schwackeana Warm., V. selloi Warm., V. talmonii M.C. Vianna, Fontella & França e V. tucanorum Mart. The polliniferous material was obtained from herbaria, it was acetolized, measured, described and illustrated by light microscopy and scanning electronic microscopy. The results reveal that the species of Vochysia have some differences on pollen morphology as: a) the medium size on the most part of them (but V. glazioviana that has small size); b) the oblate spheroidal shape in eight species, suboblate shape (ten species), spheroidal (only V. laurifolia) and prolate spheroidal shape (only V. rectiflora var. glabrescens). The amb varied among the species: was considered triangular on most part of them, subcircular (only V. glazioviana) and circular (only V. lucida). The triangular amb had straight (on the most part them) or concave (seven species) mesocolpium. The apertures have large margo, prominent, that may show or not some ornamentation. The wall ornamentation has been described as rugulate on the mesocolpium, however, in the apocolpium was found reticulated exine on V. dasyantha and V. glazioviana; scabrate in V. dardanoi; psilate with perforations in V. angelica, V. bifalcata, V. lucida and V. oblongifolia, conspicual or not, rugulate. It can be concluded that pollen morphology is an useful tool to separate the taxa of Vochysia here studied.