摘要
目的]探讨产铁细菌对芒草铅吸收特性的影响。[方法]从土壤中分离产铁载体细菌,并进行土壤pH影响芒草铅富集试验和产铁载体细菌影响芒草促生特性试验。[结果]pH值越接近7,植株生物量、株高生长势越强,叶片、根系对铅的吸收能力越弱;铅胁迫下添加产铁载体细菌均提高了芒草植株的叶、根重量及其总干重、根冠比、株高,使根系含铅量下降,叶片含铅量在400、600mg/kg胁迫下也显著下降。[结论]产铁载体细菌可提高铅胁迫下芒草抗逆性,降低富集量,应用价值高。
[Objective] To study the effects of siderophore-producing bacteria on lead absorption characteristics of Miscanthus sinesis .[Method] Siderophore-producing bacteria were separated from the soil, then the effects of soil pH on lead bioaccumulation characters and the effects of siderophore-producing bacteria on growth promoting properties of Miscanthus sinesis were studied.[Result] The growth potential of biomass and height became stronger and the lead absorptive capacity of leaf and root became weaker when pH was close to 7. The addition of siderophore-producing bacteria under lead stress increased the leaf, root weight and total dry weight of Miscanthus sinesis plants. The root-shoot ratio and plant height decreased the lead content in roots, and the lead content in leaves decreased significantly under the stress of 400 and 600 mg/kg.[Conclusion] Siderophore-producing bacteria could improve stress resistance of Miscanthus sinesis under lead stress, meanwhile, it could also reduce lead concentration of enrichment which had higher application value.
作者
赵锐名
成小英
ZHAO Rui-ming;CHENG Xiao-ying(School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi, Jiangsu 214122;Jiangsu Province Water Treatment Technology and Materials Collaborative Innovation Center, Suzhou,Jiangsu 215000)
出处
《安徽农业科学》
CAS
2019年第16期93-97,共5页
Journal of Anhui Agricultural Sciences
基金
水体污染控制与治理科技重大专项(2017ZX07203-005-07)
关键词
芒草
产铁细菌
铅胁迫
促生性
Miscanthus sinesis
Siderophore-producing bacteria
Lead stress
Growth promoting activity
