中山大学学报（自然科学版）（中英文）2022，Vol.61Issue(5)：50-61,12.DOI:10.13471/j.cnki.acta.snus.2021E029
联合接种植物生长益生菌提高杂交象草在铜污染土壤修复中的效率
Co-inoculation of plant growth-promoting rhizobacteria enhance phytoremediation efficiency of hybrid Pennisetum in Cu contaminated soils
摘要
Abstract
Plant growth-promoting rhizobacteria(PGPR)can promote the efficiency of phytoremedia-tion,but most studies have concerned on single PGPR strain and knowledge of the effects of co-inocu-lating multiple strains is still lacking. This study explored whether,and if so how,consortia of PGPR with complementary traits can increase phytoremediation efficiency. Hybrid Pennisetum(Pennisetum americanum × P. purpureum)seeds were inoculated with 1-3 Cu tolerant PGPR strains with N2-fixing or 1-aminocyclopropane-1-carboxylate deaminase-producing ability,and the treatments'effects on seed germination,seedling growth and Cu uptake were assessed in a range of conditions. Our results showed that the PGPR strains promoted both seed germination and seedling growth,and the effects were stronger under the high-Cu conditions. Hybrid Pennisetum is quite tolerant to Cu and its root-to-shoot translocation factor of Cu is lower than 0. 1. PGPR inoculation further decreased the transloca-tion factor. Co-inoculation of multiple strains enhanced both the stimulation effects on plant growth and the inhibition effects on translocation factor. Our results suggest that co-inoculation of 2-3 PGPR strains with complementary plant growth promoting traits can enhance the phytoremediation efficiency of hybrid Pennisetum,and hybrid Pennisetum is an excellent candidate plant for phytostabilization of Cu mine tailings.关键词
重金属/尾矿/微生物辅助植物修复/联合接种/杂交象草(Pennisetum americanum×P. purpureum)Key words
heavy metals/mine tailings/microbe-assisted phytoremediation/co-inoculation/hybrid Pennisetum(Pennisetum americanum × P. purpureum)分类
生物科学引用本文复制引用
苗益博,杨傲,邢成广,刘蔚秋..联合接种植物生长益生菌提高杂交象草在铜污染土壤修复中的效率[J].中山大学学报（自然科学版）（中英文）,2022,61(5):50-61,12.基金项目
国家自然科学基金(31070470,31370490) （31070470,31370490）
