Consulta: subjectFacets:"Physiological effects"
Registros recuperados: 3
Data/hora: 03/06/2024 08:41:27

Cellular and biochemical responses of the oyster Crassostrea gigas to controlled exposures to metals and Alexandrium minutum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Haberkorn, Hansy; Lambert, Christophe; Le Goic, Nelly; Quere, Claudie; Bruneau, A; Riso, Ricardo; Auffret, Michel; Soudant, Philippe.
Effects of simultaneous exposure of Pacific oyster, Crassostrea gigas, to both a harmful dinoflagellate that produces Paralytic Shellfish Toxins (PST), Alexandrium minutum, and cadmium (Cd) and copper (Cu), were assessed. Oysters were exposed to a mix of Cd-Cu with two different diets (i.e. A. minutum or Tisochrysis lutea) and compared to control oysters fed A. minutum or T. lutea, respectively, without metal addition. Metals and PST accumulations, digestive gland lipid composition, and cellular and biochemical hemolymph variables were measured after 4 days of exposure. Oysters exposed to Cd-Cu accumulated about thirty-six times less PSTs than oysters exposed to A. minutum alone. Exposure to Cd-Cu induced significant changes in neutral lipids (increase in...
Tipo: Text
Palavras-chave: Harmful algae; Metals; Oysters; Toxin accumulation; Physiological effects.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28071/26286.pdf

Root growth of tomato seedlings intensified by humic substances from peat bogs
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Silva,Alexandre Christofaro; Canellas,Luciano Pasqualoto; Olivares,Fábio Lopes; Dobbss,Leonardo Barros; Aguiar,Natalia Oliveira; Frade,Daniele Ângela Rossinol; Rezende,Carlos Eduardo; Peres,Lázaro Eustáquio Pereira.
Peats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic acids (FA) isolated from peats with different decomposition stages of organic matter (sapric, fibric and hemic) in the Serra do Espinhaço Meridional, state of Minas Gerais. Dose-response curves were established for the number of lateral roots growing from the main plant axis of tomato seedlings. The bioactivity of HA was greatest (highest response in lateral roots at lowest concentration) while FA did not intensify root growth. Both HS and HA stimulated root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological effects; Bioactivity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015

Humic substances isolated from residues of sugar cane industry as root growth promoter
Provedor de dados: Scientia Agricola
Autores: Busato,Jader Galba; Zandonadi,Daniel Basílio; Dobbss,Leonardo Barros; Façanha,Arnoldo Rocha; Canellas,Luciano Pasqualoto.
Plant growth promoting substances are widely used in modern agriculture. Several products in the market are humic substances isolated from different sources. The filter cake, a residue of sugar production, is a rich and renewable source of organic matter and these characteristics place the filter cake as a possible source of plant growth promoting substances. Humic acids (HA) from filter cake were characterized, and their effects as root growth promoters were evaluated. Chemical features of the HA were evaluated through elemental composition, acidic functional groups, E4/E6 ratio and infrared spectroscopy analyzes. The biological activity of the HA was assessed using root architecture parameters and the P-type H+-ATPase activity. The lateral root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: H+-ATPase; Brazil; Industrial residues; Physiological effects; Bioactivity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000200012