Succession of Rhizosphere Microbial Communities in Cd-Pb-Zn Co-Contaminated Soil Mediated by Celosia argentea L.

doi:10.16258/j.cnki.1674-5906.2025.10.014

Ecology and Environmental Sciences ›› 2025, Vol. 34 ›› Issue (10): 1644-1653.DOI: 10.16258/j.cnki.1674-5906.2025.10.014

• Research Article [Environmental Science] • Previous Articles Next Articles

Succession of Rhizosphere Microbial Communities in Cd-Pb-Zn Co-Contaminated Soil Mediated by Celosia argentea L.

ZHAO Jingshu¹(), LIU Jie¹^,²^,^*(), JIANG Xusheng¹, HUANG Zhangui¹, YANG Lin¹

1. Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control/Guilin University of Technology, Guilin 541006, P. R. China
2. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area/Guilin University of Technology, Guilin 541006, P. R. China

Received:2025-04-03 Online:2025-10-18 Published:2025-09-26

镉-铅-锌复合污染土壤中青葙根际微生物群落的演替过程

赵婧姝¹(), 刘杰¹^,²^,^*(), 蒋旭升¹, 黄展桂¹, 杨霖¹

1.桂林理工大学/广西环境污染控制理论与技术重点实验室，广西桂林 541006
2.桂林理工大学/广西岩溶地区水污染控制与用水安全保障协同创新中心，广西桂林 541006

通讯作者: *E-mail: liujie@glut.edu.cn
作者简介:赵婧姝（1998年生），女（满族），硕士研究生，主要研究方向为受损环境的生态修复。E-mail: zjs0112024@163.com
基金资助:
国家自然科学基金重点项目(5223006);广西高校中青年教师科研基础能力提升项目(2025KY0295)

Abstract

Abstract:

Heavy metal pollution poses a serious threat to ecosystems and human health. Co-contamination by cadmium (Cd), lead (Pb), and zinc (Zn) is a typical form of heavy metal soil contamination. Celosia argentea L. is an ideal candidate for the phytoremediation of Cd-Pb-Zn co-contaminated soil because of its ability to accumulate and tolerate multiple metals. Rhizosphere microorganisms play a crucial role in phytoremediation; however, the succession pattern of microbial communities in the rhizosphere of C. argentea during soil remediation remains unclear. To address this knowledge gap, we conducted a pot experiment to investigate the heavy metal bioaccumulation characteristics of C. argentea in Cd-Pb-Zn co-contaminated soils. Additionally, the succession dynamics of the rhizosphere microbial community were analyzed using second-generation amplicon absolute quantification sequencing. The results demonstrated that by day 28, C. argentea accumulated Cd, Pb, and Zn at concentrations of 13.7 mg∙kg⁻¹, 74.3 mg∙kg⁻¹, and 580 mg∙kg⁻¹, respectively, confirming its capacity for Cd and Zn accumulation and Pb tolerance. The diversity index of the rhizosphere microbial community followed a U-shaped trend over the growth period, with significant structural shifts (p<0.05). At the phylum level, the absolute abundance of rhizosphere microorganisms increased by 47.1% compared to the pre-planting soil levels. At the genus level, the absolute abundance of plant growth-promoting bacteria increased by 51.3%. Correlation analysis revealed that Acidobacteriales_1, Chitinophagaceae, Candidatus_1, Saccharimonadales, Iamiaceae, and Gemmatimonadaceae exhibited significant positive correlations with C. argentea biomass, suggesting their potential role in promoting plant growth. Furthermore, microbial network analysis identified Chitinophagaceae and Candidatus_1 as core hub taxa, indicating their potential as microbial germplasm resources for enhancing the remediation of Cd-Pb-Zn co-contaminated soils.

Key words: Cd-Pb-Zn co-contamination, Celosia argentea L., phytoremediation, rhizosphere microorganisms, community succession

摘要：

重金属污染对生态系统和人类健康构成严重威胁，镉（Cd）、铅（Pb）、锌（Zn）复合污染是较典型的土壤重金属污染类型之一。青葙（Celosia argentea L.）凭借多金属富集和耐受性能力，成为修复Cd-Pb-Zn复合污染土壤的理想植物。根际微生物在植物修复中起关键作用，但利用青葙修复时其土壤群落演替规律尚不明确。通过盆栽试验，研究了青葙修复Cd-Pb-Zn复合污染土壤的重金属生物累积特征，并结合二代扩增子绝对定量测序技术，分析青葙根际微生物群落演替过程。结果表明，第28天时青葙镉、铅、锌含量分别为13.7、74.3、580 mg∙kg⁻¹，表现出富集镉、锌，耐受铅的能力。青葙根际微生物群落多样性指数随生长期呈U型趋势，且群落结构发生显著变化（p<0.05）。门水平上，第28天时根际微生物的绝对丰度较种植前土壤微生物增加了47.1%；属水平上，促生菌绝对丰度分别增加51.3%。根据相关性分析，Acidobacteriales_1、Chitinophagaceae、Candidatus_1、Saccharimonadales、Iamiaceae、Gemmatimonadaceae与青葙生物量呈显著正相关，表明这些微生物可能对青葙有一定的促生作用。微生物网络分析表明，Chitinophagaceae和Candidatus_1是核心枢纽类群，显示出这两种微生物作为修复Cd-Pb-Zn复合污染土壤微生物种质资源的潜力。

关键词: 镉-铅-锌复合污染, 青葙, 植物修复, 根际微生物, 群落演替

CLC Number:

X171.5

ZHAO Jingshu, LIU Jie, JIANG Xusheng, HUANG Zhangui, YANG Lin. Succession of Rhizosphere Microbial Communities in Cd-Pb-Zn Co-Contaminated Soil Mediated by Celosia argentea L.[J]. Ecology and Environmental Sciences, 2025, 34(10): 1644-1653.

赵婧姝, 刘杰, 蒋旭升, 黄展桂, 杨霖. 镉-铅-锌复合污染土壤中青葙根际微生物群落的演替过程[J]. 生态环境学报, 2025, 34(10): 1644-1653.

Figures/Tables 11

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指标	单位	值
pH	-	6.75±0.11
有机质	%	2.88±0.13
速效钾	mg∙kg⁻¹	191±3.11
有效磷	mg∙kg⁻¹	30.7±0.96
硝态氮	mg∙kg⁻¹	0.15±0.00
阳离子交换量CEC	cmol∙L⁻¹	18.6±0.15
有效态Cd	mg∙kg⁻¹	2.16±0.01
有效态Pb	mg∙kg⁻¹	396±1.27
有效态Zn	mg∙kg⁻¹	150±0.83
总量Cd	mg∙kg⁻¹	7.60±0.52
总量Pb	mg∙kg⁻¹	2070±99.6
总量Zn	mg∙kg⁻¹	1538±67.3

指标	单位	值
pH	-	6.75±0.11
有机质	%	2.88±0.13
速效钾	mg∙kg⁻¹	191±3.11
有效磷	mg∙kg⁻¹	30.7±0.96
硝态氮	mg∙kg⁻¹	0.15±0.00
阳离子交换量CEC	cmol∙L⁻¹	18.6±0.15
有效态Cd	mg∙kg⁻¹	2.16±0.01
有效态Pb	mg∙kg⁻¹	396±1.27
有效态Zn	mg∙kg⁻¹	150±0.83
总量Cd	mg∙kg⁻¹	7.60±0.52
总量Pb	mg∙kg⁻¹	2070±99.6
总量Zn	mg∙kg⁻¹	1538±67.3

部位	种植时间/ d	每株干质量/g	Cd累积量/ （mg∙kg⁻¹）	Pb累积量/ （mg∙kg⁻¹）	Zn累积量/ （mg∙kg⁻¹）	Cd累积量/ （μg∙plant⁻¹）	Pb累积量/ （μg∙plant⁻¹）	Zn累积量/ （μg∙plant⁻¹）
地上部	7	0.21±0.02c	10.7±0.60a	28.0±7.95a	413±27.8b	2.27±0.24c	5.93±1.76a	87.7±9.27c
	14	0.68±0.13b	10.8±0.98a	9.38±12.1b	348±28.4c	7.39±2.02b	6.36±1.14a	237±42.3b
	21	0.87±0.17b	8.32±1.20b	6.36±14.9b	351±43.6c	7.20±1.37b	5.59±1.89a	304±61.1b
	28	1.34±0.11a	11.5±1.37a	5.64±13.6b	489±26.5a	15.8±2.66a	8.29±1.76a	711±167a
根部	7	0.04±0.00c	20.4±1.23a	405±77.6a	1108±64.1a	0.83±0.10c	16.7±4.66c	45.1±2.98c
	14	0.19±0.03b	11.4±1.96b	239±72.4b	698±77.0c	2.15±0.60b	46.2±20.6b	132±29.1b
	21	0.21±0.01b	11.5±2.60b	274±34.6b	646±91.3c	2.40±0.49b	57.6±6.58b	136±16.8b
	28	0.39±0.07a	21.4±1.07a	311±49.7b	893±41.3b	8.30±1.15a	120±23.6a	348±57.7a

部位	种植时间/ d	每株干质量/g	Cd累积量/ （mg∙kg⁻¹）	Pb累积量/ （mg∙kg⁻¹）	Zn累积量/ （mg∙kg⁻¹）	Cd累积量/ （μg∙plant⁻¹）	Pb累积量/ （μg∙plant⁻¹）	Zn累积量/ （μg∙plant⁻¹）
地上部	7	0.21±0.02c	10.7±0.60a	28.0±7.95a	413±27.8b	2.27±0.24c	5.93±1.76a	87.7±9.27c
	14	0.68±0.13b	10.8±0.98a	9.38±12.1b	348±28.4c	7.39±2.02b	6.36±1.14a	237±42.3b
	21	0.87±0.17b	8.32±1.20b	6.36±14.9b	351±43.6c	7.20±1.37b	5.59±1.89a	304±61.1b
	28	1.34±0.11a	11.5±1.37a	5.64±13.6b	489±26.5a	15.8±2.66a	8.29±1.76a	711±167a
根部	7	0.04±0.00c	20.4±1.23a	405±77.6a	1108±64.1a	0.83±0.10c	16.7±4.66c	45.1±2.98c
	14	0.19±0.03b	11.4±1.96b	239±72.4b	698±77.0c	2.15±0.60b	46.2±20.6b	132±29.1b
	21	0.21±0.01b	11.5±2.60b	274±34.6b	646±91.3c	2.40±0.49b	57.6±6.58b	136±16.8b
	28	0.39±0.07a	21.4±1.07a	311±49.7b	893±41.3b	8.30±1.15a	120±23.6a	348±57.7a

Succession of Rhizosphere Microbial Communities in Cd-Pb-Zn Co-Contaminated Soil Mediated by Celosia argentea L.

镉-铅-锌复合污染土壤中青葙根际微生物群落的演替过程

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