Article
Environmental Sciences
Tong Zhou, Hao Huang, Tingting Mu, Yuyang Wang, Jiawen Zhou, Xinyang Li, Longhua Wu, Peter Christie
Summary: Pot and column experiments were conducted to study the effect of rainfall simulation on soil Cd leaching during phytoextraction by S. plumbizincicola. The results showed that soil Cd leaching increased with increasing rainfall intensity, but decreased under weak rainfall conditions. Overall, S. plumbizincicola had a controlled effect on soil Cd leaching during Cd uptake.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Environmental Sciences
Wuyu Song, Jie Wang, Lulu Zhai, Liqiang Ge, Shefeng Hao, Liang Shi, Chunlan Lian, Chen Chen, Zhenguo Shen, Yahua Chen
Summary: The study revealed that Cd and Zn accumulate more in the shoots than in the roots of Sedum plants, while Pb tends to accumulate more in the roots. There is a significant positive correlation between Cd and Zn accumulation in the shoots, and the accumulation rate of Cd in S. plumbizincicola increases with exposure time, while the accumulation rate of Zn slightly decreases.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2022)
Article
Environmental Sciences
Lijuan Huang, Hans Chr Bruun Hansen, Xiaosong Yang, Jing Mu, Zijian Xie, Songyan Li, Guangmei Wu, Zhengyi Hu
Summary: This study investigated how pre-wheat sulfur application influences cadmium uptake in rice under wheat-rice rotation. Results showed that Cd accumulation in brown rice peaked at 60 mg S kg(-1), with higher levels increasing Cd concentrations in brown rice due to sulfur-induced effects on soil pore water sulfate and leaf S promoting Cd translocation. However, brown rice Cd decreased at 120 mg S kg(-1) due to low Cd solubility and inhibited Cd uptake from root and leaf S uptake. Thus, applying S-containing fertilizers to Cd-contaminated paddy soils is not recommended.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Yue Zhu, Wenmin Qiu, Xiaoyang He, Longhua Wu, De Bi, Zhiping Deng, Zhengquan He, Chao Wu, Renying Zhuo
Summary: Transcriptional and proteomic analyses were used to investigate the response of S. plumbizincicola plants to Cd stress, identifying several metabolic pathways potentially involved in Cd tolerance and accumulation. Staining and accumulation assays of transgenic lines over-expressing a Cd up-regulated gene provided insight into its role in lignin biosynthesis and Cd accumulation under Cd stress.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Haiyun Xie, Jiuzhou Chen, Yabei Qiao, Kuan Xu, Zhi Lin, Shengke Tian
Summary: This study explores the effect of biofortification on soil cadmium (Cd) remediation using a fruit tree Sedum alfredii Hance and oil sunflower crop rotation and relay cropping mode. The results show that biofortification measures can significantly improve the Cd extraction effect and do not affect the safe production of crops. This has important guiding significance for Cd pollution remediation and safe production in farmland.
Article
Environmental Sciences
Pengjie Hu, Yanpei Du, Yuying Yang, Zhenxuan Li, Yongming Luo, Longhua Wu
Summary: The study found that, in soils with added waste liquor, cadmium and zinc were mainly retained in the top 0-10 cm soil layer, while the levels of these metals decreased significantly in the soil profile when S. plumbizincicola was added. The amount of cadmium and zinc extracted by plants exceeded the amount applied in the soils, indicating that S. plumbizincicola is effective in removing metals from the environment.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2022)
Article
Environmental Sciences
Zhongjun Xue, Mengjun Wu, Hongxiang Hu, Yusef Kianpoor Kalkhajeh
Summary: This study investigated the effects of EDTA, TS, and CA on Cd uptake and translocation by S. plumbizincicola in contaminated soils. The results indicated that the activators increased Cd accumulation in plant tissues and reduced soil total Cd levels. However, excessive activator use may have negative impacts on soil aggregates and microorganisms, emphasizing the importance of controlling chelating agent amounts for soil quality preservation.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2021)
Article
Plant Sciences
Shaocui Li, Renying Zhuo, Miao Yu, Xiaoyu Lin, Jing Xu, Wenmin Qiu, Haiying Li, Xiaojiao Han
Summary: A Cd tolerance protein SpCTP3 was identified in Sedum plumbizincicola. However, the mechanism of Cd detoxification and accumulation mediated by SpCTP3 in plants was unclear. Overexpression of SpCTP3 in poplar plants resulted in higher Cd accumulation, altered Cd distribution, increased ROS content, and enhanced activities of antioxidant enzymes. The expression levels of transporter genes related to Cd2+ transport and detoxification were also higher in transgenic plants. These results suggest that overexpressing SpCTP3 in transgenic plants could improve phytoremediation of Cd-polluted soil.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Engineering, Environmental
Zi Yang, Hai-Tao Wu, Hao Yang, Wan-Di Chen, Jia-Lan Liu, Fan Yang, Li Tai, Bin-Bin Li, Bo Yuan, Wen-Ting Liu, Yan-Feng Zhang, Yan-Rong Luo, Kun-Ming Chen
Summary: Phytoextraction is an environmentally friendly phytoremediation technology that reduces the total amount of heavy metals in soil. In this study, we identified three different heavy metal transporters in the hyperaccumulator Sedum pumbizincicola that can transport cadmium. By overexpressing these transporters in high biomass and environmentally adaptable crops, the ability to accumulate cadmium and other heavy metals was significantly increased. These findings offer effective solutions for phytoextraction in both cadmium and multiple heavy metal-contaminated soils.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Yixin Zhang, Yanlan Mo, Liyuan Han, Zhenyuan Sun, Wenzhong Xu
Summary: This study compared the transcriptomes of S. plumbizincicola and the non-hyperaccumulating ecotype of S. alfredii, revealing differentially expressed genes involved in heavy metal transport and detoxification in S. plumbizincicola. The highly expressed transcription factor genes SpARR11 and SpMYB84 were identified as potential regulators of Cd hyperaccumulation. Knockout mutations of these genes resulted in decreased Cd accumulation, suggesting their roles in the regulation of Cd hyperaccumulation in S. plumbizincicola. Transcriptome analysis combined with CRISPR/Cas9 technology provides valuable insights into the transcriptional regulation mechanism of hyperaccumulation in S. plumbizincicola.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Environmental Sciences
Yue Zhu, Wenmin Qiu, Yuhong Li, Jinjuan Tan, Xiaojiao Han, Longhua Wu, Yugen Jiang, Zhiping Deng, Chao Wu, Renying Zhuo
Summary: Sedum plumbizincicola is a herbaceous species capable of accumulating excessive cadmium, especially with up-regulation of transport proteins, in response to Cd exposure. The study identified and quantified Cd-responsive membrane proteins in root, stem, and leaf tissues, showing significant changes in transport proteins such as ABC transporters and aquaporins after Cd treatment. The results provide insights into the molecular mechanisms of Cd hyper-tolerance and hyper-accumulation in S. plumbizincicola for potential applications in genetic engineering for phytoremediation purposes.
Article
Environmental Sciences
Yuyang Wang, Tong Zhou, Wenyong Wang, Jie Zhao, Zhu Li, Yanyan Ge, Zhaoyang Wang, Longhua Wu, Peter Christie
Summary: Phytoextraction with Sedum plumbizincicola is an effective environmental remediation technique for removing high levels of Cd from polluted soils. This study conducted a field experiment in Yunnan province, China, and found that variations in soil properties can significantly influence the efficiency of phytoextraction.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yixia Cai, Bogui Pan, Bingquan Liu, Kunzheng Cai, Jihui Tian, Wei Wang
Summary: The application of exogenous silicon in different ways can significantly increase the retention capacity of rice root for Cd, reduce Cd concentrations in root compartments, and enhance Cd sequestration in roots. TJ-Si is more effective in increasing Cd retention and decreasing Cd migration in rice roots compared to T-Si and J-Si.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yuqin Liang, Xiyuan Xiao, Zhaohui Guo, Chi Peng, Peng Zeng, Xiaoyan Wang
Summary: The application of different plant growth hormones and chelators on hyperaccumulator Sedum alfredii Hance can significantly increase plant growth, enhance pigment content in leaves, and improve the absorption and translocation of cadmium and lead, thereby improving the phytoremediation efficiency of heavy metals in plants.
Article
Agronomy
Shuaishuai Gao, Yuan Guo, Xueying Cao, Caisheng Qiu, Huajiao Qiu, Xinlin Zhao
Summary: Trace metal pollution in farmland poses a threat to crop and human health. Restoring and utilizing these polluted farmlands are necessary, but phytoremediation is limited by low efficiency and plant economic value. A field study found that a rotation of Sedum plumbizincicola and kenaf can effectively remediate heavy-metal-contaminated farmland. Kenaf had higher biomass but lower metal concentrations compared to S. plumbizincicola. The rotation increased metal removal by 7.88%, 126%, 33.5%, and 4.39% compared to monoculture of S. plumbizincicola.
Article
Agriculture, Multidisciplinary
Pengjie Hu, Feng Tu, Simin Li, Yunjun Pan, Cheng Kong, Xumei Zhang, Shaohua Wang, Yongquan Sun, Dan Qiu, Longhua Wu, Yongming Luo, Peter Christie
Summary: Wheat is a crucial staple food crop, and ensuring the safe and environmentally friendly production of wheat is essential for human safety and health. This study conducted field experiments and investigations in southern Jiangsu province to screen wheat varieties with low cadmium accumulation and to establish soil cadmium safety thresholds.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Environmental Sciences
De Bi, Beibei Wang, Zhu Li, Yabing Zhang, Xin Ke, Chengwang Huang, Wuxing Liu, Yongming Luo, Peter Christie, Longhua Wu
Summary: Microplastic pollution is a significant environmental concern on the east coast of China, with farmland showing the highest abundance due to high population density and agricultural activities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yongfeng Xu, Ying Teng, Xiaomi Wang, Wenjie Ren, Ling Zhao, Yongming Luo, Peter Christie, Chris Greening
Summary: Endogenous hydrogen (H2) is produced through rhizobium-legume associations and can influence the microbial ecology and biogeochemistry of contaminated soils. This study shows that endogenous H2 promotes the biodegradation of tetrachlorobiphenyl PCB 77 by selecting bacteria harboring PCB degradation genes.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Leizhen Rao, Decheng Gu, Xingjia Xiang, Jun Zeng, Yucheng Wu, Xiangui Lin, Peter Christie
Summary: Lignin, a complex biopolymer, can enhance the degradation of soil pollutants, but the contribution of its constituents to this process is not well understood. This study found that vanillate and p-hydroxybenzoate significantly promoted the mineralization of polycyclic aromatic hydrocarbons (PAHs), while methanol had no effect. The different constituents of lignin also had different effects on the soil bacterial community. Overall, lignin had extensive impacts on bacterial diversity, composition, and the fate of PAHs.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Pengjie Hu, Yu Zhang, Jiajia Wang, Yanpei Du, Zimeng Wang, Qinghai Guo, Zezhen Pan, Xingmao Ma, Britta Planer-Friedrich, Yongming Luo, Longhua Wu
Summary: The formation of colloid- and nanoparticle-bound As is an important geochemical process that can affect the mobility and bioavailability of arsenic (As) in paddy environments. This study focused on the distribution and composition of particle-bound As in paddy soils under changing redox conditions. The results showed that organic matter-stabilized colloidal Fe, most likely in the form of (oxy)hydroxide-clay composite, is the main carrier of As. Soil reduction released As from the colloidal fractions, while reoxidation caused their rapid sedimentation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jiawen Zhou, Rebekah E. T. Moore, Mark Rehkamper, Katharina Kreissig, Barry Coles, Yufang Sun, Zhu Li, Yongming Luo, Peter Christie, Longhua Wu
Summary: This study used stable isotope analysis to investigate the interactions between cadmium (Cd) and zinc (Zn) in the metal hyperaccumulating plant Sedum plumbizincicola. The results showed that the enrichment of light isotopes of both elements in plants was less pronounced at low metal supply levels. Furthermore, the study found that the interactions between the two metals influenced the uptake and transport mechanisms of Cd, but had little effect on those of Zn.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Zhu Li, Xi Sun, Jiawen Zhou, Longhua Wu, De Bi, Jie Zhao, Renfeng Zhu, Peter Christie
Summary: Metal pollution in Chinese agricultural soils is a significant concern, and remediation is needed for many soils. The combination of photovoltaic power generation and phytoextraction could be a novel and potential option for contaminated arable land, if they can work effectively together. A three-year field study found that shading by PV panels did not inhibit the growth or metal uptake of the hyperaccumulator plant species Sedum plumbizincicola. Phytoextraction under the PV panels effectively removed high amounts of Cd and Zn, with the hyperaccumulator taking up 3.40 and 96.2 kg ha-1 of Cd and Zn, respectively, over three seasons. This study concludes that combining soil phytoextraction with PV electricity generation can achieve soil remediation and energy production.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Ke Zhao, Yuying Yang, Jinyu Hou, Haozhe Liu, Yun Zhang, Qingling Wang, Peter Christie, Peishi Qi, Wuxing Liu
Summary: Chlorinated aliphatic hydrocarbons (CAHs) are potentially toxic substances that have been commonly found in contaminated environments. This study investigates the composition, function, and assembly of soil bacteria in an aged CAH-contaminated site using high-throughput sequencing analysis. The presence of organohalide-respiring bacteria (OHRB) is crucial in reducing the environmental stress of CAHs and improving the diversity and stability of the bacterial community. The findings suggest that the metabolic community in deep soil can potentially contribute to the monitored natural attenuation technology for CAH-contaminated sites.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Microbiology
Xia Li, Ruotong Zhao, Dandan Li, Guangzhou Wang, Shuikuan Bei, Xiaotang Ju, Ran An, Long Li, Thomas W. Kuyper, Peter Christie, Franz S. Bender, Ciska Veen, Marcel G. A. van der Heijden, Wim H. van der Putten, Fusuo Zhang, Klaus Butterbach-Bahl, Junling Zhang
Summary: This study demonstrates that the cooperation between AMF and N2O-reducing Pseudomonas on hyphae significantly reduces N2O emissions. The presence of AMF enhances the abundance of N2O-reducing bacteria, specifically Pseudomonas, which leads to a decrease in N2O emissions. The organic acids exuded by hyphae not only attract Pseudomonas, but also stimulate the expression of the nosZ gene, promoting N2O reduction.
Article
Agronomy
Shuhui Wang, Yinli Bi, Peter Christie
Summary: Dark septate endophytes (DSE) are fungi that promote seed germination and seedling growth in many plants. This study investigated the effects of DSE extracellular metabolites on maize growth, nutrient uptake, root development, and root exudation. The results showed that DSE extracellular metabolites cultured for 12 days had the most beneficial effects on maize biomass, chlorophyll content, root development, and nutrient uptake. Metabolomic analysis of maize root exudates revealed changes in lipid and organic acid content, and pathway analysis indicated their influence on specific metabolic processes. These findings suggest that DSE extracellular metabolites have potential as plant growth stimulators and can affect various metabolic processes in maize roots.
Article
Environmental Sciences
Tong Zhou, Hao Huang, Tingting Mu, Yuyang Wang, Jiawen Zhou, Xinyang Li, Longhua Wu, Peter Christie
Summary: Pot and column experiments were conducted to study the effect of rainfall simulation on soil Cd leaching during phytoextraction by S. plumbizincicola. The results showed that soil Cd leaching increased with increasing rainfall intensity, but decreased under weak rainfall conditions. Overall, S. plumbizincicola had a controlled effect on soil Cd leaching during Cd uptake.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Environmental Sciences
Yinli Bi, Mingchao Li, Xinpeng Du, Peter Christie
Summary: Vegetation restoration and microbial restoration have positive effects on the development of soil aggregates and the accumulation of soil organic carbon (SOC) in reclaimed mine soil. In a 4-year field experiment, artificial restoration and AMF inoculation were found to increase OC, TGRSP contents, and & delta;C-13 values in deep soil. Carbon flows were influenced by different restoration modes, with artificial restoration inoculated with AMF showing a pattern of carbon flow from macroaggregates to microaggregates. TGRSP content, SOC content, and & delta;C-13 value were significantly correlated, suggesting the potential association between SOC sequestration and TGRSP. Overall, artificial restoration inoculation with AMF showed great potential in promoting aggregate carbon flow and persistent SOC accumulation.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Ecology
Yi Yang, Yongliang Chen, Wenying Hao, Hanjie Xie, Yabo Chai, Lu Zhang, Zhiming Zhang, Peter Christie, Xiaolin Li, Jingping Gai
Summary: Soil bacteria play a crucial role in regulating soil carbon and nutrient cycling. However, their response to disturbance in different land-use types, particularly in alpine ecosystems, remains largely unknown. In this study, the potential of soil bacteria to influence biogeochemical processes was assessed across different land-use types on the Tibetan Plateau. The results showed that disturbance had diverse effects on soil bacterial community composition and metabolic potential. Certain bacterial taxa were found to be sensitive to disturbance, while others remained relatively stable. These findings highlight the importance of considering the effects of disturbance on soil bacteria in ecosystem management and policy decisions.
ECOSYSTEM HEALTH AND SUSTAINABILITY
(2023)
Article
Environmental Sciences
Manping Liu, Zhu Li, Simin Li, Fang Liang, Chengwang Huang, Hui Pan, Jie Wu, Siyao Liu, Limin Pu, Peter Christie, Jing Song, Paul Henning Krogh, Xin Ke, Yongming Luo, Longhua Wu
Summary: Soil pollution poses a threat to soil biodiversity and human health, but there are still many unknowns about the impact of heavy metal pollution on soil mite communities and their distribution in areas with complex environmental factors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Jiawen Zhou, Rebekah E. T. Moore, Mark Rehkamper, Katharina Kreissig, Barry Coles, Longhua Wu, Yongming Luo, Peter Christie
Summary: Soil particle size significantly affects metal distribution and stable isotopic behavior. Cadmium and zinc concentrations are generally enriched in finer particles and positively correlated with iron and manganese oxide contents. Metal isotopic fingerprinting provides insights into metal retention mechanisms, metal sources, and biogeochemical processes within soil micro-zones.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
