Antioxidant enzyme systems and the ascorbate-glutathione cycle as contributing factors to cadmium accumulation and tolerance in two oilseed rape cultivars (Brassica napus L.) under moderate cadmium stress.

摘要: Oilseed rape (Brassica napus L.) with high tolerance to cadmium (Cd) may be used in the phytoremediation of Cd-contaminated fields. However, mechanisms responsible for Cd accumulation and oilseed are still poorly understood. Here, we investigated physiological molecular processes involved two cultivars different abilities. The total cultivar L351 was higher than L338, particularly increasing concentrations exposure. L338 a more pronounced Cd-sensitive L351, while activities antioxidant enzymes (CAT, APX, GR, DHAR) as well contents GSH AsA were all observed under treatments, especially at levels. No differences found SOD between same suggesting that not key factor relation them. Gene expression levels BnFe-SOD, BnCAT, BnAPX, BcGR BoDHAR roots relatively exposure BnCAT leaves. It is concluded ascorbate-glutathione cycle play important roles tolerance.