Abstract

The synergistic relationship between arbuscular mycorrhizal fungi and plant species may play a key role in phytoremediation of arsenic(As)-contaminated soils. By using modified Leonard jars, we investigated both the distinct and integrative roles of arbuscular mycorrhizal fungi (AMF–Acaulospora scrobiculata) and rhizobia (BH-ICB-A8) isolated from As-contaminated soil on the capacity of Anadenanthera peregrina to reclaim arsenate [As(V)] from soil. AMF inoculation greatly increased plant phosphorous nutrition, as reflected in greater growth, and increased As-concentrations in the roots and shoots. While rhizobia inoculation alone increased nitrogen nutrition it did not promote plant growth or As-uptake. Rhizobia and AMF inoculation together had synergistic effects, however, increasing both the growth and the As-phytoremediation capacity of A. peregrina. Joint inoculation with rhizobia and AMF should therefore be considered a potential technique for rehabilitating As-contaminated areas using A. peregrina.

摘要

丛枝菌根真菌与植物物种之间的协同关系可能在受砷（As）污染的土壤的植物修复中发挥关键作用。通过使用改性伦纳德罐子中，我们调查两个丛枝菌根真菌的独特和综合角色（AMF- Acaulospora scrobiculata）和根瘤菌（BH-ICB-A8）从砷污染土壤中分离上的容量Anadenanthera蝇从土壤中回收砷[As（V）]。接种AMF可以极大地增加植物磷的营养，这体现在生长的增加以及根和芽中As浓度的增加。虽然单独接种根瘤菌可增加氮素营养，但并不能促进植物生长或吸收砷。根瘤菌和AMF接种一起具有协同作用，但是，会增加百日草的生长和As-植物修复能力。因此，应该考虑用根瘤菌和AMF联合接种使用百日草来修复As污染地区的一种潜在技术。