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Green beans (Phaseolus vulgaris L., cv. Alcade) were sown in the field in Central Portugal in 1992 and 1993, on eight dates per year, under air temperatures, well above the expected optimum for plant development. It was assumed that the rate of development increases linearly with temperature from a base T b to a sharply defined optimum T o , beyond which this rate decreases linearly,...
Arsenic (As) absorption by tomato (Lycopersicum esculentum Mill) and bean (Phaseolus vulgaris L.) as affected by arsenite concentration in nutrient solution was examined. The processes of As uptake and accumulation among roots, stems, leaves, and fruit were studied. Tomato and bean plants were grown in nutrient solution containing four levels of arsenite: 0, 2, 5, and 10 mg As l -1 ...
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