ANTIOXIDATIVE RESPONSE, PHYTOCHELATIN PRODUCTION AND PHOTOPROTECTIVE PIGMENTS COMPOSITION OF Brachiaria decumbens Stapf PLANTS EXPOSED TO Cd AND Zn

作者：dos Santos Fabiana Soares^*; Brasil do Amaral Sobrinho Nelson Moura; Mazur Nelson; Garbisu Carlos; Barrutia Oihana; Becerril Jose Maria

来源：Quimica Nova, 2011, 34(1): 16-U24.

• phytoremediation
• phytochelatin
• tocopherol

ANTIOXIDATIVE RESPONSE, PHYTOCHELATIN PRODUCTION AND PHOTOPROTECTIVE PIGMENTS COMPOSITION OF Brachiaria decumbens Stapf PLANTS EXPOSED TO Cd AND Zn. In order to evaluate the response of Brachiaria decumbens Stapf to Cd and Zn, plants were hydroponically exposed to 50 and 100 mu mol 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 beta-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.

• 出版日期2011