Now showing items 1-10 of 99
Ethnobotany approach taperas of maroon communities of Alcântara, Maranhão, Brasil
(International Journal of Phytocosmetics and Natural Ingredients, 2015) [Artigo]
Alcantara is the second oldest city in the state of Maranhão, which had its splendor even at the time of colonial Brazil, standing out as a major producer of sugar cane and cotton. The agrarian history of the city is old, ...
Pollination of Anemopaegma album (Bignoniaceae) with focus on floral nectar as the mediator of interactions with mutualistic and antagonistic bees
(The International Journal of Plant Reproductive Biology, 2015) [Artigo]
We focused our study on the pollination of Anemopaegma album, a Bignoniaceae species from and on the features of primary attractive, the nectar, which mediate the interaction with mutualists and antagonists bees. We ...
Extratos vegetais na germinação de sementes de Baccharis dracunculifolia e Plantago lanceolata
(Ensaios e Ciência, 2010) [Artigo]
The objective of this study were to evaluate the activity of ethanolic extrats of eucalyptus leaves (Corymba citridora), yarrow leaves (Achillea millefolium) and bitter melon leaves and stems (Momordica charantia) in the ...
Identificação de Physciaceae s.l. foliosas brasileiras
(GLALIA - Revista Electrónica del Grupo Latinoamericano de Liquenólogos, 2012) [Artigo]
In the following text, characters of taxonomic importance in Brazilian foliose Physciaceae s. l. are presented and discussed.
Velocidade de hidratação em função de características do tegumento de sementes de soja de diferentes cultivares e localidades
(Revista Brasileira de Sementes, 2009-01-01) [Artigo]
A velocidade de hidratação de sementes de soja pode ser afetada pela permeabilidade do tegumento devido a variações de espessura e composição. O objetivo no presente trabalho foi avaliar a relação entre a velocidade de ...
Low abundance of long-tongued pollinators leads to pollen limitation in four specialized hawkmoth-pollinated plants in the Atlantic Rain forest, Brazil
(Naturwissenschaften, 2014-11-01) [Artigo]
Long-tubed hawkmoth-pollinated species present some of the most remarkable examples of floral specialization depending exclusively on long-tongued hawkmoths for sexual reproduction. Nonetheless, long-tongued hawkmoths do ...
The ecophysiological performance of Vernonia polyanthes Less. (Asteraceae) in conserved and degraded forests in the Brazilian Cerrado
(Acta Physiologiae Plantarum, 2015-01-01) [Artigo]
This study was performed to determine whether the environmental conditions of the Cerrado domain could directly influence photosynthesis (primary metabolism) and essential oil production (secondary metabolism) in adult ...
Trophallaxis and reproductive conflicts in social bees
(Insectes Sociaux, 2010-05-01) [Artigo]
In the eusocial Hymenoptera, reproductive division of labour is a key aspect of colony organisation. In most of its species, workers are sterile and are unable to reproduce, while the queen monopolises reproduction. When ...
Glandular trichome diversity on leaves of Lippia origanoides and Lippia stachyoides (Verbenaceae): morphology, histochemistry, and ultrastructure
(Botany, 2015-05-01) [Artigo]
Despite the ecological and medicinal importance of glandular trichomes in Verbenaceae, information on their structure, mainly at the subcellular level, is sparse. We analyzed the morphology and histochemistry of glandular ...
A new species and a new record of Pyxine (Physciaceae) with norstictic acid from São Paulo State, Brazil
(Mycotaxon, 2011-01-01) [Artigo]
In the course of a study of Pyxine species in São Paulo State, Brazil, Pyxine jolyana was recognized as a new species. It has norstictic acid in the medulla, a rare feature in South American species. Also, another species ...