期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 66, 期 8, 页码 1923-1934出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b05123
关键词
Brassica alboglabra L. H. Bailey; cadmium; cultivar variation; pollution-safe cultivars; subcellular distribution
资金
- National Natural Science Foundation of China [21277178, 21777195]
- Chang Hungta Science Foundation of Sun Yat-sen University
Two pot experiments were conducted to compare and verify Cd accumulation capacities of different cultivars under Cd exposures (0.215, 0.543, and 0.925 mg kg(-1) in Exp-1 and 0.143, 0.619, and 1.407 mg kg(-1) in Exp-2) and Cd subcellular distributions between low- and high-Cd cultivars. Shoot Cd concentrations between the selected low- and high-Cd cultivars were 1.4-fold different and the results were reproducible. The proportions of Cd-in-cell-wall of shoots and roots were all higher in a typical low-Cd cultivar (DX102) than in a typical high-Cd cultivar (HJK), while those of Cd-in-chloroplast or Cd-in-trophoplast and Cd-in-membrane-and-organelle were opposite. The proportions of Cd-in-vacuoles-and-cytoplasm of roots in DX102 were always higher than in HJK under Cd stresses, while there was no clear pattern in those of shoots. These findings may help to reduce health risk of Cd from Chinese kale consumption and explained biochemical mechanisms of cultivar-dependent Cd accumulation among the species.
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