title: The Effects of Cadmium Exposure on Cadmium Fractionation and Enzyme Activities in the Rhizosphere of Two Radish Cultivars (Raphanus sativus L.).
abstract: The effects of increasing Cd additions on plant growth and Cd fractionation and enzyme activities in rhizosphere soil of two radish cultivars were investigated. The results showed that Cd concentrations in shoot and root of cultivar 4 were both higher than for cultivar 19 under different Cd levels. Compared with cultivar 19, the total, shoot and root biomasses of cultivar 4 were significantly reduced with increasing Cd levels. A decrease in soil pH was observed for cultivar 4. The exchangeable Cd concentration of soil from cultivar 4 was significantly higher than for soil from cultivar 19, while the carbonate-bound Cd concentration of soil from cultivar 4 was significantly lower than for cultivar 19. Enzyme activities, especially acid phosphatase activity, were more susceptible to Cd in soil from cultivar 4. These results indicated that cultivar 19 exhibits a stronger ability to adapt to Cd stress than cultivar 4.
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Xin
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Xiaohu
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Qiling
authors.initials: Q
authors.lastname: Tan
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Xuecheng
authors.initials: X
authors.lastname: Sun
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Wen
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Shiyu
authors.initials: S
authors.lastname: Qin
authors.affiliation: Hubei Provincial Engineering Laboratory for New Fertilizers/Research Center of Trace Elements/Key Laboratory of Horticultural Plant Biology (HZAU), MOE/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China. hucx@mail.hzau.edu.cn.
authors.forename: Chengxiao
authors.initials: C
authors.lastname: Hu
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D018533:Biomass; D002104:Cadmium / Q000302:isolation & purification* / Q000633:toxicity*; D006863:Hydrogen-Ion Concentration; D018517:Plant Roots / Q000187:drug effects; D031224:Raphanus / Q000737:chemistry / Q000145:classification / Q000187:drug effects* / Q000201:enzymology*; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000302:isolation & purification / Q000633:toxicity*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D000135:Acid Phosphatase
keywords: Bioavailable; Cd fractionation; Enzyme activities; Rhizosphere