Effects of plant growth-promoting bacteria isolated from copper tailings on plants in sterilized and non-sterilized tailings.
Effects of plant growth-promoting bacteria isolated from copper tailings on plants in sterilized and non-sterilized tailings.
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DOI：
10.1016/j.chemosphere.2013.10.089
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发表时间：
2014-02
期刊：
影响因子：
8.8
通讯作者：
Wei-qiu Liu;Chaopin Yang;Si Shi;Wensheng Shu
中科院分区：
文献类型：
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作者：
Wei-qiu Liu;Chaopin Yang;Si Shi;Wensheng Shu
通过筛选能以1-氨基环丙烷-1-羧酸盐为唯一氮源的菌株（命名为ACC-B）或能从铜尾矿上生长的植物根际中提取固定氮的菌株（命名为FLN-B），分离出10株具有潜在植物促生长能力的耐铜菌。结果表明，10株菌株均具有产吲哚乙酸和铁载体的内在能力，且大部分菌株能动员不溶性磷酸盐。此外，一项温室研究表明，ACC-B、FLN-B和两者的混合物对在灭菌后的尾矿上生长的紫荆草、紫花苜蓿和红叶麻都有相似的、强有力的刺激生长的能力。例如，p的地上生物量。在灭菌后的尾矿上生长60 d后，紫癜增加了278-357%。在未灭菌的尾砂上也能显著促进植物的生长，但促进作用要弱得多。因此，植物促生菌在植物修复实践中的应用策略值得进一步研究，以获得更高的促生效果。
Ten strains of Cu-tolerant bacteria with potential plant growth-promoting ability were isolated by selecting strains with the ability to use 1-aminocyclopropane-1-carboxylate as a sole nitrogen source (designated ACC-B) or fix nitrogen (designated FLN-B) originating from the rhizosphere of plants growing on copper tailings. All 10 strains proved to have intrinsic ability to produce indole acetic acid and siderophores, and most of them could mobilize insoluble phosphate. In addition, a greenhouse study showed that ACC-B, FLN-B and a mixture of both had similar, potent ability to stimulate growth ofPennisetum purpureum,Medicago sativaandOenothera erythrosepalaplants grown on sterilized tailings. For instance, above-ground biomass ofP.purpureumwas 278–357% greater after 60 d growth on sterilized tailings in their presence. They could also significantly promote the growth of the plants grown on non-sterilized tailings, though the growth-promoting effects were much weaker. So, strategies for using of the plant growth-promoting bacteria in the practice of phytoremediation deserve further studies to get higher growth-promoting efficiency.