狼尾草等6种植物对十溴联苯醚污染土壤的生理响应及其修复效果  

Research on the Physiological Responses of Six Plants Pennisetum Alopecuroides Etc to BDE-209 in Soil and Their Phytoremediation Effect

作　　者：刘京[1] 尹华[1] 彭辉[1] 叶锦韶[1] 叶芊[1] 李丽华[1] 何宝燕[1] 

机构地区：[1]暨南大学环境工程系广东省高校水土环境毒害性污染物防治与生物修复重点实验室,广州510632

出　　处：《农业环境科学学报》2012年第9期1745-1751,共7页Journal of Agro-Environment Science

基　　金：国家自然科学基金委-广东联合基金重点项目(U0933002);国家自然科学基金项目(50978122)

摘　　要：考察了狼尾草、龙葵、空心菜、苣菜、芥菜和鱼腥草6种植物对土壤中十溴联苯醚(BDE-209)的生理响应及其修复效果。结果表明,在BDE-209污染条件下,供试植物体内丙二醛(MDA)含量升高,表明植物受到一定的毒害作用,而在植物抗逆境机制作用下,植物体内可溶性蛋白质含量升高,超氧化物歧化酶(SOD)活性下降;在供试植物生物量方面,BDE-209对龙葵、空心菜和狼尾草地上部有促进作用,而对苣菜、芥菜具有一定的抑制作用;6种修复植物体内均检测出BDE-209,且地上部与根部BDE-209含量具有显著差异,其中狼尾草根部干重含量高达16.93mg·kg-1;修复60d后,土壤中BDE-209含量均有一定程度的下降,最高去除率可达40.44%,且根际土与非根际土BDE-209去除率有显著差异。修复效果依优劣次序为狼尾草>龙葵、空心菜>鱼腥草>芥菜>苣菜。The physiological responses of plants Pennisetum alopecuroides, Solanum nigrum, Ipomoea aquatica Forsk, Sonchus brachyotus D C, Brassica juncea and Houttuynia cordata Thunb to contaminant BDE -209 in soil were investigated, and the phytoremediation effects of these plants on BDE-209 contamination were explored. The results indicated that, the contents of MDA in tested plants increased under the condition of BDE-209 pollution, revealing that the plants suffered from toxic effect to a certain extent. Meanwhile the increased soluble pro- tein content and decreased SOD activity were also detected, due to the mechanism of adversity resistance in plants, In respect of biomass of tested plants, BDE-209 promoted the growth of shoots of Pennisetum alopecuroides, Solanum nigrum and Ipomoea aquatica Forsk, but inhibited that of Sonchus brachyotus D C and Brassica juncea to a certain degree. The contents of BDE-209 in all six plants were detected with significant difference existed in shoots and roots. Among these a content of as high as 16.93 mg·kg-1 BDE-209 has been found in the root dry weight of Pennisetum alopecuroides. The concentration of BDE-209 in soil has decreased to some extent after 60 days remediation and the maximum removal efficiency of BDE-209 reached 40.44%. BDE-209 removal rate of rhizosphere soil differed significantly from that of non- rhizosphere. The sequence of the plants with remediation effect from high to low in turn was Pennisetum alopecuroides, Solanum nigrum and Ipomoea aquatica Forsk, Houttuynia cordata Thunb, Brassica juncea, Sonchus brachyotus D C.

关 键 词：十溴联苯醚 植物修复 生理响应 植物吸收 

分 类 号：X173[环境科学与工程—环境科学]