菌根对镉污染水稻生长的影响研究  

Effect of Mycorrhiza on the Growth of Rice Contaminated by Cadmium

作　　者：王立[1] 刘双洋[1] 马放[1] 安广楠 徐亚男[3] 齐珊珊[1] 朱宏源[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]环境保护部环境工程评估中心,北京100012 [3]中国市政工程华北设计研究总院有限公司,天津300000

出　　处：《安徽农业科学》2015年第19期241-244,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(51179041);水体污染控制与治理科技重大专项(2012ZX07201003);黑龙江省自然科学基金项目(E201206);城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2014TS05)

摘　　要：[目的]研究菌根对镉污染水稻生长的影响。[方法]以水稻为试验材料,采用土壤盆栽方式,研究了镉胁迫条件下,AMF菌剂对水稻植株营养生长的影响。[结果]AMF可与水稻稳定共生,镉的施加对水稻侵染率不会产生明显抑制,施加菌剂处理后水稻的菌根依赖性指数提高。水稻株高和根长均随镉含量的增加呈下降趋势,且施加菌剂可缓解镉对水稻产生的生长抑制效应。不同镉处理条件下水稻地上干重顺序为GM〉GI〉CK,其中GM较CK相比增加幅度为10.76%~59.48%,因此摩西球囊霉对于水稻生物量的促进更为明显,且地下干重的增加趋势情况与地上顺序一致。在镉含量为5 mg/kg内的低浓度镉胁迫条件下,水稻根冠比降低程度较缓慢,表明菌剂在中低浓度的镉污染情况下对水稻有较强的保护作用。[结论]将AMF施加在镉污染的农田土壤时,能够很好地缓解镉胁迫对水稻造成的生长发育的抑制,对于保障水稻良好的生长状况有较强的应用潜力。[Objective] The research aims to study the impact of mycorrhiza on growth of rice contaminated by cadmium. [Method] The rice was inoculated with AMF in the cadmium contaminated soil. A pot culture experiment was carried out to study the effect of AMF on the growth of rice. [Result] AMF can live with rice stably. Adding cadmium does not produce significant inhibition of rice root infection rate,and rice mycorrhizal dependency index increases after inoculated with AMF. With the levels of cadmium increase,rice plant height and root length decline,while AMF can alleviate the growth inhibitory effect of rice with cadmium. Under different cadmium treatment conditions,the rule of dry weight in rice shoot is GM GI CK,and the increase amplitude of GM compared with CK is 10. 76%- 59. 48%,so GM is more effective in promoting rice biomass increase,and so as the root dry weight. When cadmium content is less than 5 mg / kg,root-top ratio reduces slowly,showing that AMF has strong protective effect in rice at low concentrations of cadmium pollution. [Conclusion] AMF can be useful in easing rice growth inhibition caused by cadmium,and has strong potential in guaranteeing good growth conditions for rice.

关 键 词：水稻 丛枝菌根真菌 镉 生长 

分 类 号：S511[农业科学—作物学] X5[环境科学与工程—环境工程]