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Effect of copper on antioxidant enzyme activities and mineral nutrition of white lupin plants grown in nutrient solution
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Orientador(es)
Resumo(s)
We analyzed the effect of different copper (Cu) concentrations (0.10, 0.15, 0.20 and
0.35 mM) and time (1 day to 9 days) on several growth and biochemical parameters
of roots and shoots of white lupin plants (Lupinus albus cv Estoril) grown in nutrient
solution. A significant decrease in leaf fresh weight and leaf area was detected. Copper
accumulated in the roots, and an impairment of nutrient translocation was only observed
after six days at the highest Cu concentrations applied. A transient increase in the
activity of polyphenoloxidase (EC 1.10.3.1) enforces a role for lignification as a defense
strategy under enhanced Cu levels. The activities of several antioxidative enzymes were
enhanced after Cu application. Our results indicate that Lupinus albus cv ‘Estoril’ is a
rather resistant plant that can cope with moderate concentrations of copper, mostly by
controlling up to a certain point, the uptake of excessive amounts of this metal
Descrição
Palavras-chave
white lupin copper oxidative stress
Contexto Educativo
Citação
Miguel P. Mourato , Luisa Louro Martins & Ann Cuypers (2009) Effect of Copper on Antioxidant Enzyme Activities and Mineral Nutrition of White Lupin Plants Grown in Nutrient Solution, Journal of Plant Nutrition, 32:11, 1882-1900,
Editora
Taylor & Francis