植物修复
超量积累植物
去壳
假单胞菌
环境化学
化学
微生物种群生物学
植物
根际
植物提取工艺
生物
细菌
重金属
遗传学
作者
Liu Xing,Wei Xing Zheng,Yang Lu,Xiaowen Liu,Junjun Liu,Jie Ren,Wencheng Wu,Yuntao Wang,Jie Li
出处
期刊:Chemosphere
[Elsevier]
日期:2021-11-30
卷期号:289: 133136-133136
被引量:14
标识
DOI:10.1016/j.chemosphere.2021.133136
摘要
Walnut green husk (WGH) is a common agricultural waste, but it may be conducive to phytoremediation of heavy metals owing to its abundant phenolic hydroxyl, carboxyl, and other functional groups. In this study, WGH solution was used as an enhancer in the phytoextraction process via Sedum plumbizincicola, a hyperaccumulator of Zn and Cd. Microbial responses in the soil and plants were seamlessly analyzed to determine the underlying mechanisms of heavy metal extraction in this process. The results showed that the addition of 0.05 g/mL WGH solution increased the accumulation of Cd (by 153%) and Zn (by 220%) in plants as well as the availabilities of Cd (by 29.46%) and Zn (by 9.71%) in the soil, which can be attributed to an increase in the relative abundance of plant growth-promoting rhizobacteria that benefit phytoextraction. Furthermore, co-occurrence network analysis indicated the keystone taxa in the microbial community. Particularly, one of the keystone taxa, Pseudomonas, was also identified as distinct taxon in soil, and it was dominant among the endophytic bacteria. These results indicated that Pseudomonas, a taxon responded to WGH solution, may play a key role in enhanced phytoextraction in both soil and plant root. These results help to a better understanding of the microbial mechanisms for heavy metal accumulation in hyperaccumulator.
科研通智能强力驱动
Strongly Powered by AbleSci AI