Cadmium accumulation and distribution in three Lettuce cultivars
1999
Azevedo, H.M.O. | Neto, M.M.P.M. | Neves, M. | Varennes, A. de
英语. We studied the accumulation and distribution of cadmium in three lettuce cultivars (Lactuca sativa L. cultivars Atraccao, Vanity and Salinas). Plants were grown in a sandy soil artificially contaminated with different amounts of Cd. The shoots were collected and divided into stems, old and young leaves and their weight, cadmium content and mineral composition were determined. Old leaves presented, on average, greater Cd concentrations than young leaves, whilst stems had the smallest Cd contents. The Atraccao cultivar presented the greatest Cd concentrations compared to the Vanity and Salinas cultivars. The Salinas cultivar had Cd concentrations that were, on average, smaller than the Vanity cultivar
显示更多 [+] 显示较少 [-]葡萄牙语. Estudou-se a acumulacao e distribuicao de cadmio em tres cultivares de alface (Lactuca saliva L. cultivares Atraccao, Vanity e Salinas). As plantas foram cultivadas num solo arenoso artificialmente contaminado com diversas quantidades de Cd. Na altura da colheita, a parte aerea foi dividida em caules, folhas jovens e velhas. Determinou-se a sua massa, teor de cadmio e composicao mineral. As folhas velhas apresentaram, em media, concentracoes maiores de cadmio do que as folhas jovens. Os caules tinham os teores de cadmio mais baixos. A cultivar Atraccao apresentou as concentracoes maiores de cadmio, seguida da cultivar Vanity. A cultivar Salinas teve, em media, os teores mais baixos de cadmio
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