Chinese brake fern (Pteris vittata L.) is a hyperaccumulator of arsenic (As) that grows naturally on soils in the southern United States. It is reasonable to expect that mycorrhizal symbiosis may be involved in As uptake by this fern. This is because arbuscular mycorrhizal (AM) fungi have a well-documented role in increasing plant phosphorus (P) uptake, P and As have similar chemical properties...

Aphid species within the genus Tuberculatus exhibit a variety of interactions with ants, ranging from close associations to non-attendance. An ant-attended species, Tuberculatus quercicola, and two non-attended species, Tuberculatus japonicus and Tuberculatus paiki, are sympatric and hosted by the tree species Quercus dentata (Fagaceae). An undescribed ant-attended species of Tuberculatus (sp. ...

The transcript levels of the protein kinase C (PKC) isoform genes during the development of a kindled epileptogenic focus, elicited by stimulation of Schaffer collateral/commissural fibres in the CA1 area of the rat hippocampus, were compared with the expression levels in control animals using a semi-quantitative in situ hybridization approach. In the hippocampus of control animals, the levels ...