1
|
Tian Y, Li P, Chen X, He J, Tian M, Zheng Z, Hu R, Fu Z, Yi Z, Li J. R3 strain and Fe-Mn modified biochar reduce Cd absorption capacity of roots and available Cd content of soil by affecting rice rhizosphere and endosphere key flora. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 278:116418. [PMID: 38696873 DOI: 10.1016/j.ecoenv.2024.116418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/26/2024] [Accepted: 04/28/2024] [Indexed: 05/04/2024]
Abstract
Microorganisms have a significant role in regulating the absorption and transportation of Cd in the soil-plant system. However, the mechanism by which key microbial taxa play a part in response to the absorption and transportation of Cd in rice under Cd stress requires further exploration. In this study, the cadmium-tolerant endophytic bacterium Herbaspirillum sp. R3 (R3) and Fe-Mn-modified biochar (Fe-Mn) were, respectively, applied to cadmium-contaminated rice paddies to investigate the effects of key bacterial taxa in the soil-rice system on the absorption and transportation of Cd in rice under different treatments. The results showed that both R3 and Fe-Mn treatments considerably decreased the content of cadmium in roots, stems and leaves of rice at the peak tillering stage by 17.24-49.28% in comparison to the control (CK). The cadmium content reduction effect of R3 treatment is better than that of Fe-Mn treatment. Further analysis revealed that the key bacterial taxa in rice roots under R3 treatment were Sideroxydans and Actinobacteria, and that their abundance showed a substantial positive correlation and a significant negative correlation with the capacity of rice roots to assimilate Cd from the surroundings, respectively. The significant increase in soil pH under Fe-Mn treatment, significant reduction in the relative abundances of Acidobacteria, Verrucomicrobia, Subdivision3 genera incertae sedis, Sideroxydans, Geobacter, Gp1, and Gp3, and the significant increase in the relative abundance of Thiobacillus among the soil bacterial taxa may be the main reasons for the decrease in available Cd content of the soil. In addition, both the R3 and Fe-Mn treatments showed some growth-promoting effects on rice, which may be related to their promotion of transformations of soil available nutrients. This paper describes the possible microbial mechanisms by which strain R3 and Fe-Mn biochar reduce Cd uptake in rice, providing a theoretical basis for the remediation of Cd contamination in rice and soil by utilizing key microbial taxa.
Collapse
Affiliation(s)
- Yunhe Tian
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Peng Li
- Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, 410125, China
| | - Xinyu Chen
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Jing He
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Meijie Tian
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Zhongyi Zheng
- College of Education, Hunan Agricultural University, Changsha 410128, China
| | - Ruiwen Hu
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China; State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Zhiqiang Fu
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Zhenxie Yi
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Juan Li
- College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| |
Collapse
|
2
|
Shi J, Qian W, Zhou Z, Jin Z, Gao X, Fan J, Wang X. Effects of acid mine drainage and sediment contamination on soil bacterial communities, interaction patterns, and functions in alkaline desert grassland. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134832. [PMID: 38852245 DOI: 10.1016/j.jhazmat.2024.134832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 05/22/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
Acid mine drainage and sediments (AMD-Sed) contamination pose serious ecological and environmental problems. This study investigated the geochemical parameters and bacterial communities in the sediment layer (A) and buried soil layer (B) of desert grassland contaminated with AMD-Sed and compared them to an uncontaminated control soil layer (CK). The results showed that soil pH was significantly lower and iron, sulfur, and electroconductivity levels were significantly higher in the B layer compared to CK. A and B were dominated by Proteobacteria and Actinobacteriota, while CK was dominated by Firmicutes and Bacteroidota. The pH, Fe, S, and potentially toxic elements (PTEs) gradients were key influences on bacterial community variability, with AMD contamination characterization factors (pH, Fe, and S) explaining 48.6 % of bacterial community variation. A bacterial co-occurrence network analysis showed that AMD-Sed contamination significantly affected topological properties, reduced network complexity and stability, and increased the vulnerability of desert grassland soil ecosystems. In addition, AMD-Sed contamination reduced C/N-cycle functioning in B, but increased S-cycle functioning. The results highlight the effects of AMD-Sed contamination on soil bacterial communities and ecological functions in desert grassland and provide a reference basis for the management and restoration of desert grassland ecosystems in their later stages.
Collapse
Affiliation(s)
- Jianfei Shi
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Urumqi, Xinjiang 830011, China
| | - Wenting Qian
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; Public Technology Service Center, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
| | - Zhibin Zhou
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Urumqi, Xinjiang 830011, China; Taklimakan Station for Desert Research, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Zhengzhong Jin
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Urumqi, Xinjiang 830011, China; Taklimakan Station for Desert Research, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
| | - Xin Gao
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Urumqi, Xinjiang 830011, China; Taklimakan Station for Desert Research, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Jinglong Fan
- Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China; National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Urumqi, Xinjiang 830011, China; Taklimakan Station for Desert Research, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Xin Wang
- Shaanxi Forestry Survey and Planning Institute, Xi'an, Shaanxi 710082, China
| |
Collapse
|
3
|
Gong J, Wang C, Wang J, Yang Y, Kong X, Liu J, Tang M, Lou H, Wen Z, Yang S, Yi Y. Integrative study of transcriptome and microbiome to reveal the response of Rhododendron decorum to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116536. [PMID: 38833983 DOI: 10.1016/j.ecoenv.2024.116536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/06/2024] [Accepted: 05/30/2024] [Indexed: 06/06/2024]
Abstract
The anomalies of cadmium (Cd) in karst region pose a severe threat to plant growth and development. In this study, the responses of Rhododendron decorum to Cd stress were investigated at physiological, molecular, and endophytic microbial levels, and the potential correlation among these responses was assessed. The Cd stress impeded R. decorum growth and led to an increase in malondialdehyde (MDA) and hydrogen peroxide (H2O2) levels, as well as enhanced superoxide dismutase (SOD) and catalase (CAT) activities. Meanwhile, Cd stress increased the Cd (up to 80 times compared to the control), sodium (Na), aluminum (Al), and zinc (Zn) contents, while decreased the magnesium (Mg) and manganese (Mn) contents in R. decorum leaves. Transcriptome suggested that Cd significantly regulated the pathways including "protein repair", "hormone-mediated signaling pathway", and "ATP-binding cassette (ABC) transporters". Additionally, q-PCR analysis showed that Cd stress significantly up-regulated the expressions of ABCB19-like and pleiotropic drug resistance, while down-regulated the expressions of indole-3-acetic acid-amido synthetase and cytokinin dehydrogenase. The Cd stress influenced the composition of endophytic microbial communities in R. decorum leaves and enhanced the interspecific bacterial associations. Furthermore, the bacterial genera Achromobacter, Aureimonas and fungal genus Vishniacozyma exhibited a high degree of connectivity with other nodes in networks constructed by the metal element contents, differentially expressed genes (DEGs), and microbial communities, respectively. These findings provide a comprehensive insight into the response of R. decorum to Cd-induced stress, which might facilitate the breeding of the Cd-tolerant R. decorum.
Collapse
Affiliation(s)
- Jiyi Gong
- College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, China; Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China
| | - Chao Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Lanzhou University, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Jianfeng Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Lanzhou University, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yang Yang
- Gansu Yasheng Agricultural Research Institute Co., Ltd., Lanzhou 730010, China
| | - Xin Kong
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China
| | - Jie Liu
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China
| | - Ming Tang
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China
| | - Hezhen Lou
- College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, China
| | - Zhirui Wen
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China
| | - Shengtian Yang
- College of Water Sciences, Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing Normal University, Beijing 100875, China.
| | - Yin Yi
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, Guizhou 550025, China.
| |
Collapse
|
4
|
Huang L, Fu Y, Liu Y, Chen Y, Wang T, Wang M, Lin X, Feng Y. Global insights into endophytic bacterial communities of terrestrial plants: Exploring the potential applications of endophytic microbiota in sustainable agriculture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172231. [PMID: 38608902 DOI: 10.1016/j.scitotenv.2024.172231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 04/01/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024]
Abstract
Endophytic microorganisms are indispensable symbionts during plant growth and development and often serve functions such as growth promotion and stress resistance in plants. Therefore, an increasing number of researchers have applied endophytes for multifaceted phytoremediation (e.g., organic pollutants and heavy metals) in recent years. With the availability of next-generation sequencing technologies, an increasing number of studies have shifted the focus from culturable bacteria to total communities. However, information on the composition, structure, and function of bacterial endophytic communities is still not widely synthesized. To explore the general patterns of variation in bacterial communities between plant niches, we reanalyzed data from 1499 samples in 30 individual studies from different continents and provided comprehensive insights. A group of bacterial genera were commonly found in most plant roots and shoots. Our analysis revealed distinct variations in the diversity, composition, structure, and function of endophytic bacterial communities between plant roots and shoots. These variations underscore the sophisticated mechanisms by which plants engage with their endophytic microbiota, optimizing these interactions to bolster growth, health, and resilience against stress. Highlighting the strategic role of endophytic bacteria in promoting sustainable agricultural practices and environmental stewardship, our study not only offers global insights into the endophytic bacterial communities of terrestrial plants but also underscores the untapped potential of these communities as invaluable resources for future research.
Collapse
Affiliation(s)
- Lukuan Huang
- Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yingyi Fu
- Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yaru Liu
- Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yijie Chen
- IDEO Play Lab, CA 91006, United States of America
| | - Tingzhang Wang
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou 310012, China
| | - Meixia Wang
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou 310012, China
| | - Xianyong Lin
- Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ying Feng
- Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
5
|
Liu S, Huang J, He W, Shi L, Zhang W, Li E, Hu J, Zhang C, Pang H. Effects of microplastics on microbial community structure and wheatgrass traits in Pb-contaminated riparian sediments under flood-drainage-planting conditions. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134283. [PMID: 38613956 DOI: 10.1016/j.jhazmat.2024.134283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/05/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
The coexistence of microplastics (MPs) and heavy metals in sediments has caused a potential threat to sediment biota. However, differences in the effects of MPs and heavy metals on microbes and plants in sediments under different sediment conditions remain unclear. Hence, we investigated the influence of polyethylene (PE) and polylactic acid (PLA) MPs on microbial community structure, Pb bioavailability, and wheatgrass traits under sequential incubation of sediments (i.e., flood, drainage, and planting stages). Results showed that the sediment enzyme activities presented a dose-dependent effect of MPs. Besides, 10 % PLA MPs significantly increased the F1 fractions in three stages by 11.13 %, 30.10 %, and 17.26 %, respectively, thus resulting in higher Pb mobility and biotoxicity. MPs altered sediment bacterial composition and structures, and bacterial community differences were evident in different incubation stages. Moreover, the co-exposure of PLA MPs and Pb significantly decreased the shoot length and total biomass of wheatgrass and correspondingly activated the antioxidant enzyme activity. Further correlation analysis demonstrated that community structure induced by MPs was mainly driven by sediment enzyme activity. This study contributes to elucidating the combined effects of MPs and heavy metals on sediment ecosystems under different sediment conditions.
Collapse
Affiliation(s)
- Si Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Wenjuan He
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Lixiu Shi
- College of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China
| | - Wei Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Enjie Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jinying Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Chenyu Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Haoliang Pang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| |
Collapse
|
6
|
Lan X, Ning Z, Jia Y, Lin W, Xiao E, Cheng Q, Cai Q, Xiao T. The rhizosphere microbiome reduces the uptake of arsenic and tungsten by Blechnum orientale by increasing nutrient cycling in historical tungsten mining area soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171429. [PMID: 38442750 DOI: 10.1016/j.scitotenv.2024.171429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/07/2024]
Abstract
The growth of pioneer plants in metal mining area soil is closely related to their minimal uptake of toxic elements. Pioneer plants can inhibit the uptake of toxic elements by increasing nutrient uptake. However, few studies have focused on the mechanisms by which the rhizosphere microbiome affect nutrient cycling and their impact on the uptake of toxic elements by pioneer plants. In this study, we selected Blechnum orientale to investigate the potential roles of the rhizosphere microbiome in nutrient cycling and plant growth in a historical tungsten (W) mining area. Our results showed that while the arsenic (As) and W contents in the soil were relatively high, the enrichment levels of As and W in the B. orientale were relatively low. Furthermore, we found that the As and W contents in plants were significantly negatively correlated with soil nutrients (S, P and Mo), suggesting that elevated levels of these soil nutrients could inhibit As and W uptake by B. orientale. Importantly, we found that these nutrients were also identified as the most important factors shaping rhizosphere microbial attributes, including microbial diversity, ecological clusters, and keystone OTUs. Moreover, the genera, keystone taxa and microbial functional genes enriched in the rhizosphere soils from mining areas played a key role in nutrient (S, P and Mo) bioavailability, which could further increase the nutrient uptake by B. orientale. Taken together, our results suggest that rhizosphere microorganisms can improve pioneer plant growth by inhibiting toxic element accumulation via the increase in nutrient cycling in former W mining areas.
Collapse
Affiliation(s)
- Xiaolong Lan
- School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Zengping Ning
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Yanlong Jia
- School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China.
| | - Wenjie Lin
- School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China.
| | - Enzong Xiao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Qianyun Cheng
- School of Geography, Hanshan Normal University, Chaozhou 521041, China
| | - Qiaoxue Cai
- School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China
| | - Tangfu Xiao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| |
Collapse
|
7
|
Zhang Z, Xu D, Huang T, Zhang Q, Li Y, Zhou J, Zou R, Li X, Chen J. High levels of cadmium altered soil archaeal activity, assembly, and co-occurrence network in volcanic areas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171529. [PMID: 38453065 DOI: 10.1016/j.scitotenv.2024.171529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/23/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
Soil microbial communities are essential to biogeochemical cycles. However, the responses of microorganisms in volcanic soil with high heavy metal levels remain poorly understood. Here, two areas with high levels of cadmium (Cd) from the same volcano were investigated to determine their archaeal composition and assembly. In this study, the Cd concentrations (0.32-0.38 mg/ kg) in the volcanic soils exceeded the standard risk screening values (GB15618-2018) and correlated with archaeal communities strongly (P < 0.05). Moreover, the area with elevated levels of Cd (periphery) exhibited a greater diversity of archaeal species, albeit with reduced archaeal activity, compared to the area with lower levels of Cd (center). Besides, stochastic processes mainly governed the archaeal communities. Furthermore, the co-occurrence network was simplest in the periphery. The proportion of positive links between taxa increased positively with Cd concentration. Moreover, four keystone taxa (all from the family Nitrososphaeraceae) were identified from the archaeal networks. In its entirety, this study has expanded our comprehension of the variations of soil archaeal communities in volcanic areas with elevated cadmium levels and serves as a point of reference for the agricultural development of volcanic soils in China.
Collapse
Affiliation(s)
- Zihua Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Daolong Xu
- Inner Mongolia Academy of Science and Technology, Hohhot 010010, Inner Mongolia, China
| | - Tao Huang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Qing Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Yingyue Li
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Jing Zhou
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Ruifan Zou
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Xiaoyu Li
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China.
| | - Jin Chen
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China.
| |
Collapse
|
8
|
Gong W, Li Q, Tu Y, Yang D, Lai Y, Tang W, Mao W, Feng Y, Liu L, Ji X, Li H. Diversity and functional traits of seed endophytes of Dysphania ambrosioides from heavy metal contaminated and non-contaminated areas. World J Microbiol Biotechnol 2024; 40:191. [PMID: 38702442 DOI: 10.1007/s11274-024-04003-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/24/2024] [Indexed: 05/06/2024]
Abstract
Seed endophytes played a crucial role on host plants stress tolerance and heavy metal (HM) accumulation. Dysphania ambrosioides is a hyperaccumulator and showed strong tolerance and extraordinary accumulation capacities of multiple HMs. However, little is known about its seed endophytes response to field HM-contamination, and its role on host plants HM tolerance and accumulation. In this study, the seed endophytic community of D. ambrosioides from HM-contaminated area (H) and non-contaminated area (N) were investigated by both culture-dependent and independent methods. Moreover, Cd tolerance and the plant growth promoting (PGP) traits of dominant endophytes from site H and N were evaluated. The results showed that in both studies, HM-contamination reduced the diversity and richness of endophytic community and changed the most dominant endophyte, but increased resistant species abundance. By functional trait assessments, a great number of dominant endophytes displayed multiple PGP traits and Cd tolerance. Interestingly, soil HM-contamination significantly increased the percentage of Cd tolerance isolates of Agrobacterium and Epicoccum, but significantly decreased the ration of Agrobacterium with the siderophore production ability. However, the other PGP traits of isolates from site H and N showed no significant difference. Therefore, it was suggested that D. ambrosioides might improve its HM tolerance and accumulation through harboring more HM-resistant endophytes rather than PGP endophytes, but to prove this, more work need to be conducted in the future.
Collapse
Affiliation(s)
- Weijun Gong
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Qiaohong Li
- The First People's Hospital of Yunnan Province, Kunming, 650500, China
| | - Yungui Tu
- The First People's Hospital of Anning, Kunming, 650300, China
| | - Dian Yang
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Yibin Lai
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Wenting Tang
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Wenqin Mao
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Yue Feng
- The First People's Hospital of Anning, Kunming, 650300, China
| | - Li Liu
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Xiuling Ji
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Haiyan Li
- Life Science and Technology & Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China.
| |
Collapse
|
9
|
Fan H, Huang Z, Feng C, Wu Z, Tian Y, Ma F, Li H, Huang J, Qin X, Zhou Z, Zhang X. Functional keystone taxa promote N and P removal of the constructed wetland to mitigate agricultural nonpoint source pollution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169155. [PMID: 38065493 DOI: 10.1016/j.scitotenv.2023.169155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/23/2023] [Accepted: 12/05/2023] [Indexed: 01/18/2024]
Abstract
Characterized by irregular spatial and temporal variations of pollutant loading and complex occurrence mechanisms, agricultural nonpoint source pollution (ANPSP) has always been a great challenge in field restoration worldwide. Returning farmlands to wetlands (RFWs) as an ecological restoration mode among various constructed wetlands was selected to manage ANPSP in this study. Triarrhena lutarioriparia, Nelumbo nucifera and Zizania latifolia monocultures were designed and the water pollutants was monitored. N. nucifera and Z. latifolia could reach the highest TN (53.28 %) and TP (53.22 %) removal efficiency, respectively. By 16s high-throughput sequencing of rhizosphere bacteria, 45 functional species were the main contributors for efficient N and P removal, and 38 functional keystone taxa (FKT) were found with significant ecological niche roles and metabolic functions. To our knowledge, this is the first study to explore the microbial driving N and P removal mechanism in response to ANPSP treated by field scale RFWs.
Collapse
Affiliation(s)
- Huixin Fan
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Zhongliang Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Chongling Feng
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, Hunan 410004, PR China
| | - Zijian Wu
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Yuxin Tian
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Fengfeng Ma
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Hui Li
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Jing Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Xiaoli Qin
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China
| | - Zhou Zhou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, Hunan 410004, PR China
| | - Xuan Zhang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, Hunan 410004, PR China.
| |
Collapse
|
10
|
Zhang J, Na M, Wang Y, Ge W, Zhou J, Zhou S. Cadmium levels and soil pH drive structure and function differentiation of endophytic bacterial communities in Sedum plumbizincicola: A field study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168828. [PMID: 38029975 DOI: 10.1016/j.scitotenv.2023.168828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/01/2023]
Abstract
Sedum plumbizincicola is a promising hyperaccumulator for heavy metal phytoremediation. It grows in heavy metal polluted soil and stores specific endophyte resources with heavy metal tolerance or growth promotion characteristics. In this study, the endophyte communities of S. plumbizincicola, growing naturally in the field (two former mining locations and one natural location) were investigated, and their structure and function were comparatively studied. The bioaccumulation and translocation characteristics of cadmium (Cd) and selenium (Se) in S. plumbizincicola were also evaluated. The results showed that the heavy metal pollution reduced the richness and diversity of endophyte communities. Soil pH and Cd concentration could be the key factors affecting the composition of the endophyte community. Co-occurrence network analysis identified that 22 keystone taxa belonging to Actinobacteriota, Firmicutes, Myxococcota and Proteobacteria were positively correlated with Cd bioaccumulation and translocation. The predicted endophyte metabolic pathways were enriched in physiological metabolism, immune system, and genetic Information processing. These findings may help to understand how endophytes assist host plants to enhance their adaptability to harsh environments, and provide a basis for further exploration of plant-endophyte interactions and improvement in phytoremediation efficiency.
Collapse
Affiliation(s)
- Jinming Zhang
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Meng Na
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China; Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Yukun Wang
- College of Resources & Environment, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Wen Ge
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Jihai Zhou
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China; Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Shoubiao Zhou
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China; Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu, Anhui 241002, China.
| |
Collapse
|
11
|
Luo XF, Liu MY, Tian ZX, Xiao Y, Zeng P, Han ZY, Zhou H, Gu JF, Liao BH. Physiological tolerance of black locust (Robinia pseudoacacia L.) and changes of rhizospheric bacterial communities in response to Cd and Pb in the contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:2987-3003. [PMID: 38079046 DOI: 10.1007/s11356-023-31260-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 11/22/2023] [Indexed: 01/18/2024]
Abstract
Woody plants possess great potential for phytoremediation of heavy metal-contaminated soil. A pot trial was conducted to study growth, physiological response, and Cd and Pb uptake and distribution in black locust (Robinia pseudoacacia L.), as well as the rhizosphere bacterial communities in Cd and Pb co-contaminated soil. The results showed that R. pseudoacacia L. had strong physiological regulation ability in response to Cd and Pb stress in contaminated soil. The total chlorophyll, malondialdehyde (MDA), soluble protein, and sulfhydryl contents, as well as antioxidant enzymes (superoxide dismutase, peroxidase, catalase) activities in R. pseudoacacia L. leaves under the 40 mg·kg-1 Cd and 1000 mg·kg-1 Pb co-contaminated soil were slightly altered. Cd uptake in R. pseudoacacia L. roots and stems increased, while the Pb content in the shoots of R. pseudoacacia L. under the combined Cd and Pb treatments decreased in relative to that in the single Pb treatments. The bacterial α-diversity indices (e.g., Sobs, Shannon, Simpson, Ace, and Chao) of R. pseudoacacia L. rhizosphere soil under Cd and Pb stress were changed slightly relative to the CK treatment. However, Cd and Pb stress could significantly (p < 0.05) alter the rhizosphere soil microbial communities. According to heat map and LEfSe (Linear discriminant analysis Effect Size) analysis, Bacillus, Sphingomonas, Terrabacter, Roseiflexaceae, Paenibacillus, and Myxococcaceae at the genus level were notably (p < 0.05) accumulated in the Cd- and/or Pb-contaminated soil. Furthermore, the MDA content was notably (p < 0.05) negatively correlated with the relative abundances of Isosphaeraceae, Gaiellales, and Gemmatimonas. The total biomass of R. pseudoacacia L. was positively (p < 0.05) correlated with the relative abundances of Xanthobacteraceae and Vicinamibacreraceae. Network analysis showed that Cd and Pb combined stress might enhance the modularization of bacterial networks in the R. pseudoacacia L. rhizosphere soil. Thus, the assembly of the soil bacterial communities in R. pseudoacacia L. rhizosphere may improve the tolerance of plants in response to Cd and/or Pb stress.
Collapse
Affiliation(s)
- Xu-Feng Luo
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Meng-Yu Liu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Zi-Xi Tian
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Yue Xiao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Peng Zeng
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
- Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Zi-Yu Han
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China
| | - Hang Zhou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
- Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Jiao-Feng Gu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
- Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Bo-Han Liao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
- Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China
| |
Collapse
|
12
|
Zhou X, Lei B, Yin D, Kang J, He Z, He T, Xu X. Application potential of biofertilizer-assisted Pennisetum giganteum in safe utilization of mercury-contaminated paddy fields. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119291. [PMID: 37832289 DOI: 10.1016/j.jenvman.2023.119291] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/29/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023]
Abstract
High mercury (Hg) bioaccumulation in crops such as rice in Hg-contaminated areas presents a potential health hazard to humans and wildlife. To develop a safe alternative technique, bacillus-inoculated biofertilizer, citric acid, earthworms, and selenium-modified activated clay were compared for their ability to regulate Hg bioaccumulation in Pennisetum giganteum (P. giganteum). This biofertilizer significantly increased Bacillus sp. abundance in the soil by 157.12%, resulting in the removal of 27.52% of water-soluble Hg fractions through volatilization and adsorption mechanisms. The variation in bioavailable Hg in the soil significantly reduced the total Hg concentration in P. giganteum young leaves, old leaves, stems, and roots of P. giganteum by 74.14%, 48.08%, 93.72%, and 50.91%, respectively (p < 0.05), which is lower than the Chinese feed safety standard (100 ng g-1). The biofertilizer inhibitory potential was highly consistent with that of the selenium-modified activated clay. Biofertilizers significantly reduced the methylmercury concentration in various P. giganteum tissues (p < 0.05), whereas selenium-modified activated clay failed to achieve a comparable effect. This biofertilizer-assisted planting pattern can achieve an economic income quadruple that of the rice planting pattern in the Hg-contaminated paddy fields. Because of its significant environmental and financial applications, the biofertilizer-assisted planting pattern is expected to replace Hg-contaminated paddy fields.
Collapse
Affiliation(s)
- Xian Zhou
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China; College of Resources and Environment Engineering, Guizhou University, Guiyang, 550025, China
| | - Bangxing Lei
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Deliang Yin
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China; College of Resources and Environment Engineering, Guizhou University, Guiyang, 550025, China.
| | - Jichuan Kang
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China.
| | - Zhangjiang He
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Tianrong He
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Xiaohang Xu
- Engineering Research Center for Southwest Bio-Pharmaceutical Resources, Key Laboratory of Karst Georesources and Environment, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, China
| |
Collapse
|
13
|
Wang Y, Wang F, Ford R, Tang W, Zhou M, Ma B, Zhang M. The influences of graphene oxide and nitrification inhibitor on vegetable growths and soil and endophytic bacterial communities: Double-edge sword effects and nitrate risk controls. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166337. [PMID: 37591394 DOI: 10.1016/j.scitotenv.2023.166337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023]
Abstract
Crop yield and quality are substantial indicators of evaluating agricultural nitrogen management practices, and the nitrate (NO3--N) is one of the predominant factors affecting crop quality. The NO3--N accumulation in vegetable crop affects plant growth and quality and human health. Therefore, it is necessary to stimulate vegetable yield but eliminate excessive NO3--N in soils and plants with feasible management strategies. Graphene oxide (GO) is a novel carbon nanomaterial that has attracted great attention, but rare research has been conducted to quantify the effects of GO on plant NO3--N accumulation and microbial communities. This study explored effects of the GO and nitrification inhibitors, dicyandiamide (DCD) and 3, 4-dimethylpyrazole phosphate (DMPP), on vegetable yields and NO3--N contents and bacterial communities in soil-cabbage (Brassica rapa subsp. Chinensis) system. The soil NO3--N content was significantly reduced with the single GO application. The cabbage NO3--N content was increased by 60.4 % while the cabbage yield was significantly enhanced by 101.9 % with the single GO application. Meanwhile, the Invsimpson index of soil bacterial community and the ACE and Chao1 richness estimators of endophytic bacterial community were significantly decreased by the GO application. Cabbage NO3--N content was significantly and negatively correlated with the soil Myxococcota, endophytic bacterial community co-occurrence network edge, cabbage soluble sugar and cabbage proline. The GO application generated double-edged sword effects of positively promoting yield but causing risks of NO3--N accumulation and quality deterioration. However, these adverse effects could be mitigated by the extra nitrification inhibitor application. The potential ecological risks of GO application to the vegetable quality and endophytic community should be considered.
Collapse
Affiliation(s)
- Yan Wang
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Fang Wang
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rebecca Ford
- Centre for Planetary Health and Food Security, School of Environment and Science, Griffith University, Brisbane, Queensland 4111, Australia
| | - Wenhui Tang
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Minzhe Zhou
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Bin Ma
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Manyun Zhang
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China; Centre for Planetary Health and Food Security, School of Environment and Science, Griffith University, Brisbane, Queensland 4111, Australia.
| |
Collapse
|
14
|
Liu Y, Zhang B, Yao Y, Wang B, Cao Y, Shen Y, Jia X, Xu F, Song Z, Zhao C, Gao H, Guo P. Insight into the plant-associated bacterial interactions: Role for plant arsenic extraction and carbon fixation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 894:164960. [PMID: 37348724 DOI: 10.1016/j.scitotenv.2023.164960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/12/2023] [Accepted: 06/15/2023] [Indexed: 06/24/2023]
Abstract
This study investigated the interactions between rhizosphere and endosphere bacteria during phytoextraction and how the interactions affect arsenic (As) extraction and carbon (C) fixation of plants. Pot experiments, high-throughput sequencing, metabonomics, and network analysis were integrated. Results showed that positive correlations dominated the interconnections within modules (>95 %), among modules (100 %), and among keystone taxa (>72 %) in the bacterial networks of plant rhizosphere, root endosphere, and shoot endosphere. This confirmed that cooperative interactions occurred between bacteria in the rhizosphere and endosphere during phytoextraction. Modules and keystone taxa positively correlating with plant As extraction and C fixation were identified, indicating that modules and keystone taxa promoted plant As extraction and C fixation simultaneously. This is mainly because modules and keystone taxa in plant rhizosphere, root endosphere, and shoot endosphere carried arsenate reduction and C fixation genes. Meanwhile, they up-regulated the significant metabolites related to plant As tolerance. Additionally, shoot C fixation increased peroxidase activity and biomass thereby facilitating plant As extraction was confirmed. This study revealed the mechanisms of plant-associated bacterial interactions contributing to plant As extraction and C fixation. More importantly, this study provided a new angle of view that phytoextraction can be applied to achieve multiple environmental goals, such as simultaneous soil remediation and C neutrality.
Collapse
Affiliation(s)
- Yibo Liu
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Baiyu Zhang
- Department of Civil Engineering, Faculty of Engineering and Applied Science, Memorial University, St. John's, NL, Canada A1B 3X5
| | - Ye Yao
- College of Physics, Jilin University, Changchun 130012, PR China
| | - Bo Wang
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Yiqi Cao
- Department of Civil Engineering, Faculty of Engineering and Applied Science, Memorial University, St. John's, NL, Canada A1B 3X5
| | - Yanping Shen
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Xiaohui Jia
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Fukai Xu
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Ziwei Song
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - Chengpeng Zhao
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China
| | - HongJie Gao
- Chinese Research Academy of Environmental Science, Beijing 100012, PR China.
| | - Ping Guo
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, PR China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130012, PR China.
| |
Collapse
|
15
|
Xiao Y, Chen L, Li C, Ma J, Chen R, Yang B, Liu G, Liu S, Fang J. Role of the rhizosphere bacterial community in assisting phytoremediation in a lead-zinc area. FRONTIERS IN PLANT SCIENCE 2023; 13:1106985. [PMID: 36874912 PMCID: PMC9982732 DOI: 10.3389/fpls.2022.1106985] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
Heavy metals (HMs) contamination and vegetation destruction in the mining area caused by mining activities are severely increasing. It is urgent to restore vegetation and stabilize HMs. In this study, we compared the ability of HMs phytoextraction/phytostabilization of three dominant plants, including Artemisia argyi (LA), Miscanthus floridulus (LM), and Boehmeria nivea (LZ) in a lead-zinc mining area in Huayuan County (China). We also explored the role of the rhizosphere bacterial community in assisting phytoremediation using 16S rRNA sequencing technology. Bioconcentration factor (BCF) and translocation factor (TF) analysis showed that LA preferred accumulating Cd, LZ preferred accumulating Cr and Sb, and LM preferred accumulating Cr and Ni. Significant (p < 0.05) differences were found among the rhizosphere soil microbial communities of these three plants. The key genera of LA were Truepera and Anderseniella, that of LM were Paracoccus and Erythrobacter, and of LZ was Novosphingobium. Correlation analysis showed some rhizosphere bacterial taxa (e.g., Actinomarinicola, Bacillariophyta and Oscillochloris) affected some soil physicochemical parameters (e.g., organic matter and pH) of the rhizosphere soil and enhanced the TF of metals. Functional prediction analysis of soil bacterial community showed that the relative abundances of genes related to the synthesis of some proteins (e.g., manganese/zinc-transporting P-type ATPase C, nickel transport protein and 1-aminocyclopropane-1-carboxylate deaminase) was positively correlated with the phytoextraction/phytostabilization capacity of plants for heavy metals. This study provided theoretical guidance on selecting appropriate plants for different metal remediation applications. We also found some rhizosphere bacteria might enhance the phytoremediation of multi-metals, which could provide a reference for subsequent research.
Collapse
Affiliation(s)
- Yunhua Xiao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Liang Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Chunxiao Li
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Jingjing Ma
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Rui Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Bo Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Shuming Liu
- College of Chemical and Environmental Sciences, YiLi Normal University, YiLi, China
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| |
Collapse
|
16
|
Xu M, Zhang K, Wang Y, Zhang B, Mao K, Zhang H. Health Risk Assessments and Microbial Community Analyses of Groundwater from a Heavy Metal-Contaminated Site in Hezhou City, Southwest China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:604. [PMID: 36612924 PMCID: PMC9819039 DOI: 10.3390/ijerph20010604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 05/14/2023]
Abstract
In industrial site groundwater, heavy metal pollution is relatively common, causing great harm to the surrounding environment and human health. To explore the relationships between the heavy metal concentration, health risks and microbial community distribution, the groundwater from a polluted site at an abandoned processing plant in Hezhou City, China, is taken as the research object. A health risk assessment model recommended by the United States Environmental Protection Agency (US EPA) is used for the evaluation, and high-throughput sequencing technology is used to analyze the characteristics of the microbial community in the groundwater. The results show that the heavy metal pollution levels of five monitoring wells are different. The monitoring well labelled HLJ2 is polluted by Cu, Mn, Ni and Cd, and the other four monitoring wells are polluted by As and Cd to varying degrees. The carcinogenic risk values of heavy metals in the groundwater environments of the five monitoring wells are all greater than the acceptable range, and only the noncarcinogenic risk value of the HLJ2 monitoring well exceeds 1, which greatly impacts health. The risks posed by the contaminants in the site groundwater through the ingestion route of drinking water are greater than those caused by the ingestion route of skin contact. The groundwater environments of the five monitoring wells contain Proteobacteria and Patescibacteria, indicating that these two bacteria have certain tolerances to heavy metal pollution. The microbial community composition varies between the monitoring wells, suggesting that different concentrations and types of heavy metal contamination promote different types of bacterial growth. Studies have shown that Proteobacteria have many heavy metal resistance genes, improving their tolerance in heavy metal-polluted environments; additionally, Proteobacteria can transport heavy metals, which is conducive to the restoration of polluted sites.
Collapse
Affiliation(s)
- Mingjie Xu
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, China
| | - Kuankuan Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Yiduo Wang
- College of Eco-Environment Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Bin Zhang
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, China
- School of food and biotechnology of Xihua University, Chengdu 610039, China
| | - Kang Mao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Hua Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| |
Collapse
|