MICRONUTRIENTS IN COMMON BEAN cv.'BRSMG MADREPEROLA' ON TROPICAL SOILS CONTAMINATED WITH MERCURY

摘要

Toxic elements in the environment may interfere on the mineral nutrition and metabolic pathways when absorbed by plants. Mercury, due to its high toxicity and biaccumulation capacity, it is one of the most harmful elements to the biota. Mercury can modify the physiology and metabolism of the plant, due to the changes in nutrient absorption and accumulation in the plant tissues.Brazil is the largest producer and consumer of common bean (Phaseolus vulgaris L.) in the world, with approximately 3.2 million tons per year. Among the several cultivars developed, cv. BRSMG Madreperola is very well adapted, producing high quality semi-precocious "carioca" grains, with resistance to the main diseases, including the common mosaic virus and various types of anthracnose. This work aimed to evaluate the influence of high concentrations of Hg on the content and accumulation of micronutrients in BRSMG Madreperola cultivated in two tropical soils, artificially contaminated.