功能菌接种对石油污染土壤修复效果及微生物群落的影响

左一琳; 陈文杰; 孙慧杰; 丁晓艳; 詹亚斌; 张昊; 丁国春; 李季; 魏雨泉; 刘蕊

doi:10.12153/j.issn.1674-991X.20230177

功能菌接种对石油污染土壤修复效果及微生物群落的影响

doi: 10.12153/j.issn.1674-991X.20230177

左一琳^{1, 2,},
陈文杰¹,
孙慧杰³,
丁晓艳²,
詹亚斌^{1, 2},
张昊⁴,
丁国春^{1, 2},
李季^{1, 2},
魏雨泉^{1, 2, ,},
刘蕊¹

1.
中国农业大学资源与环境学院
2.
中国农业大学有机循环研究院（苏州）
3.
北京林业大学水土保持学院
4.
生态环境部土壤与农业农村生态环境监管技术中心

基金项目: 国家重点研发计划项目（2020YFC1807901）

详细信息

作者简介:
左一琳(1997—),女，硕士研究生，主要从事污染场地微生物修复研究，yilin_zuo@163.com

通讯作者:
魏雨泉(1991—)，男，副教授，主要从事有机固体废物资源化及微生物生态研究，weiyq2019@cau.edu.cn

中图分类号: X53
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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-06
- 录用日期: 2023-08-15
- 修回日期: 2023-05-10

Effect of inoculation of functional bacteria on the remediation of petroleum polluted soil and the microbial community

ZUO Yilin^{1, 2
,},
CHEN Wenjie¹,
SUN Huijie³,
DING Xiaoyan²,
ZHAN Yabin^{1, 2},
ZHANG Hao⁴,
DING Guochun^{1, 2},
LI Ji^{1, 2},
WEI Yuquan^{1, 2
, ,},
LIU Rui¹

1.
College of Resources and Environment, China Agricultural University
2.
Organic Recycling Research Institute (Suzhou), China Agricultural University
3.
College of Soil and Water Conservation, Beijing Forestry University
4.
Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment

摘要

摘要:
利用定向筛选驯化的二苯并噻吩（DBT）降解菌对石油污染土壤进行为期40 d的土壤模拟培养试验，研究了功能菌（红球菌，Rhodococcus sp. ZYL-1）接种对石油污染土壤中DBT的降解效果，结合16S rDNA高通量测序及生物信息学分析，解析了功能菌接种对土壤细菌群落演替的影响。结果表明：在25 ℃的暗箱培养过程中，红球菌添加显著提高了DBT污染土壤的降解率（P<0.001），生物接种处理组（BIOEIF）的DBT降解主要发生在培养前10 d，培养结束后DBT降解率接近60%，比依赖土壤土著微生物的自然衰减组（NAT）降解率提升10%以上；对比BIOEIF组和NAT组土壤培养过程中细菌群落组成，BIOEIF组香农多样性指数和系统发育指数显著低于NAT组，但接种红球菌未对DBT污染土壤的细菌群落组成造成显著影响，Micromonospora、Bacillus、unclassified_f_Planococcaceae为污染土壤培养过程中的优势菌属，而接种的红球菌并未成为优势菌属；网络分析表明，功能菌接种显著提升污染土壤微生物的DBT关键降解菌属类群，通过强化土壤土著微生物Shimazuella协同降解DBT，进而提升了石油烃污染土壤的修复效果，Shimazuella可能是参与DBT的代谢的关键微生物。所接种的功能菌（红球菌）可协同提高土著微生物对于石油污染土壤DBT的生物降解，具有较高的土壤修复应用潜力。
- 二苯并噻吩(DBT) /
- 生物修复 /
- 红球菌 /
- 细菌群落演替
Abstract:
The dibenzothiophene (DBT) degrading bacteria screened and domesticated based on previous culture experiment was inoculated into the petroleum contaminated soil for a 40 day simulated soil remediation experiment. The degradation effect of functional bacteria (Rhodococcus sp. ZYL-1) and the succession of bacterial community in the petroleum contaminated soil was analyzed. The results showed the addition of Rhodococcus sp. ZYL-1 increased significantly the degradation efficiency of DBT compared to control during the incubation at 25 ℃ in the dark chamber (P<0.001). The DBT degradation in the bioaugmentation treatment (BIOEIF) mainly occurred in the first 10 days after soil incubation, in which DBT degradation rate was close to 60% at the end of incubation, higher than that in the control, i.e., natural attenuation treatment (NAT) relying on soil indigenous microorganisms. Compared with the bacterial community composition between BIOEIF treatment and NAT treatment in the soil incubating process, the Shannon diversity index and phylogenetic diversity index of BIOEIF were significantly lower than that in NAT, but the inoculation of Rhodococcus sp. ZYL-1 did not affect significantly the composition of the soil bacterial community. Micromonospora, Bacillus, and unclassified_f_Planococcaceaeis were detected as the dominated taxa in the petroleum contaminated soil, but Rhodococcus which was inoculated did not have an obviously high abundance in soils. Network analysis showed that key functional bacteria for DBT degradation had significantly improved in the contaminated soil in BIOEIF, which might be due to the symbiosis of Shimazuella with indigenous microorganism. In conclusion, the inoculated functional bacteria (Rhodococcus sp. ZYL-1) could obviously improve the biodegradation of DBT in petroleum hydrocarbon contaminated soil based on enhancing the degradation function of indigenous microorganisms.
- dibenzothiophene (DBT) /
- bioremediation /
- Rhodococcus /
- bacterial community succession

HTML全文

图 1 二苯并噻吩在土壤系统中的降解情况

注：***表示P＜0.001下有显著差异。

Figure 1. Degradation profile of dibenzothiophene in the soil system

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图 2 不同处理中OTUs的数量差异

Figure 2. Quantitative differences of OTUs in different treatments

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图 3 门水平的相对丰度

Figure 3. Relative abundance at the phylum level

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图 4 属水平的相对丰度

Figure 4. Relative abundance at the genus level

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图 5 不同处理污染土壤培养过程中的细菌多样性

注：*表示P<0.05下有显著差异，**表示P<0.01下有显著差异。

Figure 5. Bacterial diversity during the incubation of contaminated soil with different treatments

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图 6 不同处理污染土壤培养过程中基于OTUs水平的PCoA细菌群落结构

Figure 6. PCoA on OTU level during the incubation of contaminated soil with different treatments

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图 7 污染土壤培养过程中与DBT降解相关细菌属的网络分析

注：红线表示与DBT降解显著正相关，绿线表示显著负相关。相同颜色表示相同门的不同属。

Figure 7. Network analysis of DBT degradation and related bacterial genera

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图 8 不同处理中细菌 OTUs 分子生态网络分析

注：以模块大小进行着色，大模块（n>5）以紫色、绿色等彩色表示，小模块以灰色表示；红色连线表示正相关，蓝色连线表示负相关。

Figure 8. Network association of bacterial OTUs in different treatments

下载: 全尺寸图片幻灯片

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