Artículos de revistas
Anther Dehiscence And Circumscription Of Miconia Sect. Hypoxanthus (melastomataceae)
Registro en:
Kew Bulletin. , v. 58, n. 1, p. 195 - 203, 2003.
755974
2-s2.0-0037726821
Autor
Goldenberg R.
Teixeira S.P.
Martins A.B.
Institución
Resumen
While most Melastomataceae have poricidal anthers, Miconia sect. Hypoxanthus (former sect. Chaenanthera) has anthers dehiscing by longitudinal pores, resembling rimose openings. Anther development of three species (Miconia pusilliflora and M. laticrenata from this section and M. cinnamomifolia from sect. Glossocentrum) studied through SEM and light microscopy showed that all have an epidermis with a thick and striate cuticle, except for the dehiscence area. This area is covered by a non-striate epidermis which is associated with the septum that lies between the two thecae. During dehiscence the septum holds the non-striate epidermis, which is torn at the margins of the dehiscence area. Since anther opening of all three species follows the same pattern, in terms of tissues and mechanisms, we conclude that the circumscription of Miconia sect. Hypoxanthus should comprise all species with stamens that dehisce along the septum, resulting in narrow openings that extend from the anther apex to the base (as in M. pusilliflora) or from the apex until half of the anther length (as in M. laticrenata). Miconia section Chaenopleura also has anthers opening by longitudinal slits, but these expose four locules, instead of the two in Hypoxanthus. 58 1 195 203 Baumgratz, J.F.A., Miconias do estado do Rio de Janeiro. Seção Chaenanthera Naud. (Melastomataceae) (1984) Rodriguésia, 36, pp. 45-58 Souza, M.L.D.R., Woodgyer, E.M., Nic Lughada, E.M., Polysporangiate anthers described for the first time in Melastomataceae (1996) Kew Bull., 51, pp. 133-144 Clausing, G., Renner, S.S., Molecular phylogenetics of Melastomataceae and Memecylaceae: Implications for character evolution (2001) Amer. J. Bot., 88, pp. 486-498 Cogniaux, A., Melastomataceae, Miconieae (1886) Flora Brasiliensis, 14 (4), pp. 64-558. , C. E P. von Martius, A. G. Eichler & I. Urban (eds.) Melastomataceae (1891) Monographiae Phanerogamarum, 7. , A. De Candolle & C. De Candolle (eds.). G. Masson, Paris, France Eyde, R.H., Teeri, J.A., Floral Anatomy of Rhexia virginica (Melastomataceae) (1967) Rhodora, 69, pp. 163-178 Fahn, A., (1990) Plant Anatomy, , Pergamon Press, Oxford, U.K Goldenberg, R., (2000) O Gênero Miconia Ruiz & Pav. (Melastomataceae): I. Listagens Analíticas II. Revisão Taxonômica Seção Hypoxanthus (Rich. ex DC.) Hook. f. D. Phil, , Thesis, Universidade Estadual de Campinas, Campinas, Brazil Groenendijk, J.P., Bouman, F., Cleef, A., An exploratory study on seed morphology of Miconia (Melastomataceae), with taxonomic and ecological implications (1996) Acta Bot. Neerl., 45, pp. 323-344 Jensen, W.A., (1962) Botanical Histochemistry: Principles and Practice, , W. H. Freeman, San Francisco, U.S.A Johansen, D.A., (1940) Plant Microtechnique, , McGraw-Hill Book Company, New York, U.S.A Johri, B.M., Ambegaokar, K.B., Srivastava, P.S., (1992) Comparative Embryology of Angiosperms, , Springer-Verlag, Berlin, Germany Matthews, J.R., Maclachlan, C.M., The structure of certain poricidal anthers (1929) Trans. & Proc. Bot. Soc. Edinburgh, 30, pp. 104-122 Medeiros, J.D., Morretes, B.L., The embryology of Miconia cabucu (Melastomataceae) (1996) Cytologia, 61, pp. 83-91 Naudin, C.V., Melastomacearum monographicae descriptiones (1851) Ann. Sci. Nat. Bot., Sér., 3 (16), pp. 83-246 Renner, S.S., Phylogeny and classification of the Melastomataceae and Memecylaceae (1993) Nordic J. Bot., 13, pp. 519-540 Subramanyam, K., An embryological study of Melastoma malabathricum L. (1948) J. Indian Bot. Soc., 27, pp. 11-19 Tobe, H., Raven, P.H., The embryology and relationships of Dactylocladus (Crypteroniaceae) and a discussion of the family (1987) Bot. Gaz., 148, pp. 103-111 Wurdack, J.J., Melastomataceae of Santa Catarina (1962) Sellowia, 14, pp. 109-217 Melastomataceae (1973) Flora de Venezuela, 8, pp. 1-819. , T. Lasser (ed.) Melastomataceae (1980) Flora of Ecuador, 13, pp. 1-406. , G. Harling & B. Sparre (eds.) Ziegler, A., Beiträge zur Kenntnis des Androceums und der Samenentwicklung einiger Melastomataceen (1925) Bot. Arch., 9, pp. 398-467