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Ultrastructure and histology of organogenesis induced from shoot tips of maize (Zea mays, Poaceae)
(Revista de Biología Tropical; vol.57(supl.1), 2009-11)
Shoot tips of maize (Zea mays L.) were cultured on Murashige and Skoog medium supplemented with 2 mg/l BA +1 mg/l 2,4-D +40 mg/l, to investigate phases of ontogenetic development. The study used light microscopy as well ...
Substrate vibrations in the scorpion Centruroides margaritatus (Scorpiones: Buthidae) during courtship
(Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 57 (Suppl. 1): 267-274, November 2009, 2009-11)
Mating behavior in Centruroides margaritatus, as in other scorpion species, includes a series of rapid rocking or shaking movements of the male (“juddering”). It has been suggested that substrate vibrations are generated ...
Plants and butterflies of a small urban preserve in the Central Valley of Costa Rica
Costa Rica’s most populated area, the Central Valley, has lost much of its natural habitat, and the little that remains has been altered to varying degrees. Yet few studies have been conducted to assess the need for ...