Pollen Morphology Of The Genera Curtia Cham. & Schltdl. And Hockinia Gardner (gentianaceae Juss.) [morfologia Polínica Dos Gêneros Curtia Cham. & Schltdl. E Hockinia Gardner (gentianaceae Juss.)]

The pollen morphology of the neotropical genera Curtia Cham. & Schltdl. and Hockinia Gardner (Gentianaceae Juss.) was here studied. Eight species have been analyzed: Curtia conferta (Mart.) Knobl., C. diffusa (Mart.) Cham., C. obtusifolia (Spruce ex Benth.) Knobl., C. patula (Mart.) Knobl., C. quadrifolia Maguire, C. tenella (Mart.) Cham., C. verticillaris (Sprengel) Knobl. and Hockinia montana Gardner. The pollen grains were prepared by the ACLAC method, analyzed in scanning electron microscope and light microscope. The investigation is based on herbarium material. The heterostyly was confirmed in Curtia obtusifolia, C. patula and Hockinia montana Gardner. The pollen material of every heterostylous forms was studied separately. The genera presented pollen grains small or medium, in monads; colparates, isopolars; sexine microrreticulate, microrreticulate-spinulose, reticulate, reticulate spinulose or perforate. The results demonstrated certain heterogeneity in the Curtia and, were observed palynological differences, in size, exine ornamentation and apertures, between floral morphs of every heterostylous species. The two genera showed no palynological differences useful to identify them both.202273284Barth, O.M., Melhem, T.S., (1988) Glossário ilustrado de palinologia, , Campinas, UNICAMPBrummitt, R.H., Powell, C.E., Authors of plant names (1992) Kew, Royal Botanical, , GardElias, T.S. & Robyns, A. 1975. In Gentianaceae. In: R.E. WoodsonR.W. Schery Jr. & Collaborators. Flora of Panamá. Annals of the Missouri Botanical Garden 62: 61-101Erdtman, G., (1952) Pollen Morphology and Plant Taxonomy-Angiosperms, , Stockholm, Almqvist & WiksellGardner, G., Description of four new genera of plants (1843) Hooker London Journal of Botany, 2, pp. 12-13Gilg, E. 1895. Gentianaceae. In: A. Engler & K. Prantl. (eds.). Verlag von Wilhelm Engelmann, Leipzig. Die natürlichen flanzenfamilien 4(2): 50-108Maguire, B. 1981. Gentianaceae. In: B. Maguire & Collaborators. The Botany of Guayana Highland - Part. XI. Memoirs of The New York Botanical Garden 32: 330-388Punt, W., Blackmore, S., Nilson, S., Le Thomas, A., (2005) Glossary of pollen and spore terminology, , http://www.bio.uu.nl/~palaeo/glossary/glos- tp1.htm, Acesso em 8/06/2005Raynal, J., Raynal, A., Une techinique de preparation des grains de pollen fragiles (1971) Adansonia, 11 (1), pp. 77-79Salgado-Labouriau, M.L., (1973) Contribuição à palinologia dos cerrados, , Rio de Janeiro, Academia Brasileira de Ciéncias(2002) Gentianaceae - systematics and natural history, , Struwe, L. & Albert, V.A, eds, Cambridge, Cambridge University PressVieira, S., (1981) Introdução à bioestatí stica, , Rio de Janeiro, Editora Campus Ltd