title: Combined bioremediation of atrazine-contaminated soil by Pennisetum and Arthrobacter sp. strain DNS10.
abstract: Strain DNS10 was isolated from the black soil collected from the northeast of China which had been cultivated with atrazine as the sole nitrogen source. Pennisetum is a common plant in Heilongjiang Province of China. The main objective of this paper was to evaluate the efficiency of plant-microbe joint interactions (Arthrobacter sp. DNS10 + Pennisetum) in atrazine degradation compared with single-strain and single-plant effects. Plant-microbe joint interactions degraded 98.10 % of the atrazine, while single strain and single plant only degraded 87.38 and 66.71 % after a 30-day experimental period, respectively. The results indicated that plant-microbe joint interactions had a better degradation effect. Meanwhile, we found that plant-microbe joint interactions showed a higher microbial diversity. The results of microbial diversity illustrated that the positive effects of cropping could improve soil microbial growth and activity. In addition, we planted atrazine-sensitive plants (soybean) in the soil after repair. The results showed that soybean growth in soil previously treated with the plant-microbe joint interactions treatment was better compared with other treatments after 20 days of growth. This was further proved that the soil is more conducive for crop cultivation. Hence, plant-microbe joint interactions are considered to be a potential tool in the remediation of atrazine-contaminated soil.
authors.affiliation: School of Resources & Environment, Northeast Agricultural University, Harbin, 150030, People's Republic of China, zhangyinghr@hotmail.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shijie
authors.initials: S
authors.lastname: Ge
authors.forename: Mingyue
authors.initials: M
authors.lastname: Jiang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Jiang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Wang
authors.forename: Bingbing
authors.initials: B
authors.lastname: Ma
mesh_terms: D001173:Arthrobacter / Q000378:metabolism*; D001280:Atrazine / Q000032:analysis / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002681:China; D006540:Herbicides / Q000032:analysis / Q000378:metabolism*; D031782:Pennisetum / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D006540:Herbicides; D012987:Soil; D012989:Soil Pollutants; D001280:Atrazine