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In Vitro Phytotoxicity and Antioxidant Activity of Selected Flavonoids
(International Journal of Molecular Sciences, 2012-05-01) [Artigo]
The knowledge of flavonoids involved in plant-plant interactions and their mechanisms of action are poor and, moreover, the structural characteristics required for these biological activities are scarcely known. The objective ...
Intercellular pectic protuberances in leaves of some Xyris species (Xyridaceae)
(Canadian Journal of Botany-revue Canadienne de Botanique, 1996-09-01) [Artigo]
Mature leaves of eight species of Xyris were prepared by standard methods for electron transmission microscopy. Wartlike intercellular pectic protuberances were observed on the surface of inner periclinal walls of epidermal ...
Germinación de semillas después del fuego: Un estudio con una planta que habita áreas no propensas al fuego
(Phyton, 2011-12-20) [Artigo]
After a fire event, germination of seeds with hard coats can be enhanced. In the present study, we investigated whether germination of Mimosa bimucronata (DC.) Kuntze (Fabaceae) seeds, which present hard coats, is increased ...
The development of seedlings from fragments of monoembryonic seeds as an important survival strategy for Eugenia (Myrtaceae) tree species
(Trees: Structure and Function, 2012-06-01) [Artigo]
The uncommon ability of monoembryonic seeds of Eugenia to develop seedlings after cutting or even after the removal of more than half of their storage tissue has recently been reported. Some Eugenia species are included ...
Leaf emergences in Microlepis oleaefolia (DC.) Triana (Melastomataceae) and their probable function: An anatomical and ultrastructural study
(Micron, 2008-10-01) [Artigo]
Microlepis oleaefolia (D.C.) Triana, an endemic species of Melastomataceae from the Brazilian cerrado, presents very complex leaf structures called as "hairs with root-like base" embedded in the mesophyll. This paper ...
Imbibition phases and germination response of Mimosa bimucronata (Fabaceae: Mimosoideae) to water submersion
(Aquatic Botany, 2009-08-01) [Artigo]
Mimosa bimucronota is a pioneering tree that occurs predominantly in moist lowlands, floodplains and on margins of rivers and lakes in Latin America. The effect of submergence on seed germination in M. bimucronata was ...
Trichome structure and evolution in Neotropical lianas
(Annals of Botany, 2013-11-01) [Artigo]
Trichomes are epidermal outgrowths generally associated with protection against herbivores and/or desiccation that are widely distributed from ferns to angiosperms. Patterns of topological variation and morphological ...
Leaf trait variation on Erythroxylum tortuosum (Erythroxylaceae) and its relationship with oviposition preference and stress by a host-specific leaf miner
(Austral Ecology, 2011-04-01) [Artigo]
It has been suggested that plant physical and chemical traits vary considerably in space and time. Hence, leaf-mining insects may adjust their oviposition in response to leaf attributes representing high quality. Moreover, ...
VARIATION ON THE POPULATION, RACIAL, AND SPECIES LEVEL IN THE PRIMITIVE RELIC ANGIOSPERM GENUS DRIMYS (WINTERACEAE) IN SOUTH-AMERICA
(Plant Systematics and Evolution, 1979-01-01) [Artigo]
Oocyte maturation in bitches
(Animal Reproduction, 2012-07-01) [Artigo]
The canine species has been used as an experimental model for preservation of endangered species. Biotechnologies of reproduction, such as in vitro maturation (IVM), have been used to meet this objective. Several protocols ...