Hyperaccumulated Ni can defend plant tissues against herbivores and pathogens. The effectiveness of this defense, however, has not been tested with a viral pathogen. Turnip mosaic virus (TuMV) accumulation was studied in two serpentine species of Streptanthus with different Ni uptake abilities. Plants of a Ni hyperaccumulator, milk-wort jewelflower (S. polygaloides Gray), and a non-hyperaccumul...

The relationship between phenology and tree stem diameter increment is largely unexplored in tropical species, especially in wet tropical forests. To explore links between these phenomena, we measured stem diameter increment and phenology of ten canopy tree species from a range of functional types in the Atlantic lowlands of Costa Rica to test for seasonal and interannual patterns. We measured ...

-1. Paramyosins isolated from nematode Caenorhabditis elegans, clam Meretrix meretrix and Mercenaria mercenaria, scallop Patinopecten yessoensis, abalone Notohaliotis discus, lobster Homarus vulgaris and sea cucumber Holothuria leucospilata were examined for phosphorylation rate and immunological reactivity against anti-Meretrix ~t-paramyosin antiserum. 2. A high phosphorylation was only observ...

The organization of Phalacrocleptes verruciformis is, in general, less complex than that of other ciliates, and no kinetosomes have been observed. However, there are numerous suctorial tentacles at the surface of the body, and the pellicle is characterized by close-set villus-like projections. The tentacles are very small (about 430 mmicro in length, and about the same in diameter), but show th...

José Andrade Moura-Neto, Ana Flávia de Souza Moura, Edison Souza, Jorge Luiz de Carvalho Henriques Jr, Mônica Barcellos Arruda, Luciana Santos Pessoa, Lídia Theodoro Boullosa, Orlando da Costa Ferreira Junior and José Hermógenes Rocco Suassuna Clinical and Academic Unit of Nephrology, Hospital Universitário Pedro Ernesto, Rio de Janeiro State University, Rio de Janeiro, Brazil; CSB Group of Nep...

A commonly overlooked aspect of conservation planning assessments is that wildlife managers are increasingly focused on habitats that contain non-native species. We examine this management challenge in the Gila River basin (150,730 km(2)), and present a new planning strategy for fish conservation. By applying a hierarchical prioritization algorithm to >850,000 fish records in 27,181 sub-watersh...

A list is provided for the species of Ectinorus sensu stricto from Chile. Ectinorus (Ectinorus) insignis n. sp. is described from Chile: this species is characterized by the male genitalia. In the subgenus Ectinorus, the authors report the presence in Chile of E. pilosus Beaucournu & Carmen Castro, 2002 described from Argentina and E. simonsi (Rothschild, 1904) described from Bolivia but also k...