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In order to evaluate the response of Brachiaria decumbens Stapf to Cd and Zn, plants were hydroponically exposed to 50 and 100 mmol L-1 of Cd and 500 and 2000 mmol L-1 of Zn. Metal content of shoots and roots was determined, as well as alterations in photosynthetic and photoprotective pigments, antioxidant metabolites and phytochelatin synthesis. Plants concentrated elevated levels of Cd and Zn, especially in roots. Zinc exposure negatively affected chlorophyll and β-carotene content, whereas the highest dose of Cd reduced VAZ cycle pigments and tocopherol levels in plant shoots. Cadmium was the maximum inducer of the phytochelatin synthesis pathway

química nova

Resposta antioxidante, formação de fitoquelatinas e composição de pigmentos fotoprotetores em Brachiaria decumbens Stapf submetida à contaminação com Cd e Zn