Data/hora: 09/06/2024 04:40:39

Provedor de dados: | 61
País: | Brazil
Título: | Effects of Zn and Cd accumulation on structural and physiological characteristics of barley plants
Autores: | Sridhar,Balaji B. Maruthi; Han,Fengxiang X.; Diehl,Susan V.; Monts,David L.; Su,Yi.
Data: | 2007-03-01
Ano: | 2007
Palavras-chave: | Anatomy; Cadmium; Hordeum vulgare; Microscopy; Phytoremediation; Zinc.
Resumo: | The objectives of this study were to identify the structural changes caused by Zn and Cd accumulation in shoots and roots of barley (Hordeum vulgare) plants; and to correlate metal accumulation with anatomical, physiological and morphological changes. Potted plants were exposed to metal treatments of Zn and Cd for 19 and 16 d respectively. Leaves, stems and roots were harvested to identify structural changes and analyze metal accumulation. Barley effectively accumulated Zn (up to 11283 mg kg-1) and Cd (up to 584 mg kg-1) in the shoots. Microscopic structural changes, such as a decrease in intercellular spaces, breakdown of vascular bundles, and shrinkage of palisade and epidermal cells, occurred in leaves, stems and roots of plants treated with high concentrations of Zn. Zinc accumulation also resulted in a significant decrease in water content, fresh weight, dry weight and plant height. Cadmium only caused structural changes in roots at the higher concentrations. Barley plants were able to accumulate significant amounts of Zn and Cd without exhibiting symptoms of phytotoxicity when the metal concentrations were relatively low.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000100002
Editor: | Brazilian Journal of Plant Physiology
Relação: | 10.1590/S1677-04202007000100002
Formato: | text/html
Fonte: | Brazilian Journal of Plant Physiology  v.19 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess