Fe^(2+)、Ce^(3+)、La^(3+)和SeO_4^(2-)离子对白菜吸收铬、铁的影响  

Effects of Fe^(2+),Ce^(3+),La^(3+) and SeO_4^(2-)ions on the Absorption of Cr(Ⅵ) and Ferrochrome of Brassica campestris L.ssp.Chinensis(L.)

作　　者：刘小林[1] 

机构地区：[1]江西省宜春学院生命科学学院,江西宜春336000

出　　处：《热带作物学报》2011年第6期1024-1028,共5页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金项目(No.30571117);广东省科技计划项目(No.2004B20501001;2006B20601008)

摘　　要：通过水培试验,探讨了Fe2+、Ce3+、La3+和SeO42-对白菜吸收铬、铁(Cr、Fe)的影响,结果表明,当营养液中Fe2+的浓度从2.0mg/L提高到4.0mg/L条件时,白菜根Fe的含量会显著增加(p≤0.05),而白菜Cr的含量会明显下降(p≤0.05);而Ce3+、La3+和SeO42-在一定程度上有抑制白菜对六价铬[Cr(Ⅵ)]的吸收作用,在此基础上如果适当提高营养液Fe2+的浓度则会进一步降低白菜Cr的含量,但白菜根Fe的含量则会进一步提高。当营养液Ce3+、La3+和SeO42-浓度分别从0.5、0.5、0.2mg/L水平提高到1.0、1.0、0.4mg/L水平时,白菜Cr的含量会增加,而白菜根Fe的含量则呈现出下降趋势(La3+例外),降低了Fe与Ce、La、Se等稀有元素配合施用以抑制白菜Cr污染毒害的效果。Water culture experiments were undertaken to explore the effect of Fe2＋, Ce3＋, La3＋ and SeO42- ions on the absorption Cr and ferrochrome of Chinese cabbage. When Fe2＋ concentration was increased from 2.0 mg/L to 4.0 mg/L, the Fe2＋ content in the root would be increase significantly （p≤0.05 ） and the chromium content would be decreased dramatically （p ≤ 0.05）. Ce3＋, La3＋ and SeO42-to some extent would inhibit the the Cr（ Ⅵ ）absorption. An appropriate increase of the concentration of Fe2＋ in nutrient solution would further reduce the chromium content in Chinese cabbage, but the iron content of cabbage root would be further improved. When the nutrient solution Ce3＋, La3＋ and SeO42-concentration was increased from 0.5, 0.5, 0.2 mg/L to 1.0, 1.0, 0.4 mg/L respectively, the cabbage chromium content would be increased while the cabbage root iron content would be in a downward trend （except for La3＋）, and a reduction of the chromium pollution control benefited from Fe and Ce, La, Se and other rare elements application would be observed.

关 键 词：盐基离子 白菜 铬毒性 

分 类 号：Q945.14[生物学—植物学]