Estudio palinológico del género Macroptilium (Benth.) Urb. (Leguminosae) en México y Centroamérica

Acta Botanica Mexicana

Sara Fuentes-Soriano¹  Alfonso Delgado-Salinas²  Leticia Torres-Colín² 

[1] Missouri Botanical Garden;Universidad Nacional Autónoma de México

关键词: Centroamérica;    Leguminosae;    Macroptilium;    México;    polen;   

DOI  :  10.21829/abm91.2010.291

学科分类：植物学

来源: Acta Botanica Mexicana

【 摘 要 】

The pollen morphology of eightMacroptiliumspecies occurring in Mexico and Central America is described by means of light and scanning microscopy. In this region, members of the genus have pollen grains 3-colporate, medium-sized, with polar shapes from prolate-spheroidal, suboblate to oblate-spheroidal. Differences in ectoaperture (length, apex shape and membrane), ornamentation, margo, and the outline in polar side identify two pollen types: Type I. Pollen with small colpi (brevicolpate), margo thickened, apex of the ectoaperture round, membrane granular, polar outline convex angular, exine tectate or semitectate, apocolpium punctate or rugulate, and mesocolpium microreticulate or rugulate. Species of sectionMicrocochle,includingM. gibbosifolium, M. pedatum,andM. supinumare characterized by this pollen type. Type II. Pollen with long colpi (longicolpate) margo non-thickened, apex of the ectoaperture acute, membrane granular, pollen outline circular to semi-angular, exine tectate or semitectate, apocolpium punctate to foveolate, and mesocolpium microreticulate to foveolate. Species of sectionMacroptiliumcomprising,M. atropurpureum, M. erythroloma, M. gracile, M. lathyroides,andM. longipedunculatumare distinguished by this pollen type. Palynological descriptions of five species ofMacroptiliumare provided for the first time.

【 授权许可】

CC BY-SA