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https://www.readbyqxmd.com/read/28937878/degradation-of-chlorpyrifos-by-an-endophytic-bacterium-of-the-sphingomonas-genus-strain-hjy-isolated-from-chinese-chives-allium-tuberosum
#1
Fayun Feng, Yisong Li, Jing Ge, Jinjin Chen, Wayne Jiang, Shuang He, Xianjing Liu, Xiangyang Yu
The degradation of chlorpyrifos (CP) by an endophytic bacterial strain (HJY) isolated from Chinese chives (Allium tuberosum Rottl. ex Spreng) was investigated. Strain HJY was identified as Sphingomonas sp. based on morphological, physiological, and biochemical tests and a 16S rDNA sequence analysis. Approximately 96% of 20 mg L(-1) CP was degraded by strain HJY over 15 days in liquid minimal salts medium (MSM). The CP degradation rate could also be increased by glucose supplementation. The optimal conditions for the removal of 20 mg L(-1) CP by strain HJY in MSM were 2% inoculum density, pH 6...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28934656/mercury-accumulation-plant-cyrtomium-macrophyllum-and-its-potential-for-phytoremediation-of-mercury-polluted-sites
#2
Yu Xun, Liu Feng, Youdan Li, Haochen Dong
Cyrtomium macrophyllum naturally grown in 225.73 mg kg(-1) of soil mercury in mining area was found to be a potential mercury accumulator plant with the translocation factor of 2.62 and the high mercury concentration of 36.44 mg kg(-1) accumulated in its aerial parts. Pot experiments indicated that Cyrtomium macrophyllum could even grow in 500 mg kg(-1) of soil mercury with observed inhibition on growth but no obvious toxic effects, and showed excellent mercury accumulation and translocation abilities with both translocation and bioconcentration factors greater than 1 when exposed to 200 mg kg(-1) and lower soil mercury, indicating that it could be considered as a great mercury accumulating species...
September 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28934107/cultivar-and-metal-specific-effects-of-endophytic-bacteria-in-helianthus-tuberosus-exposed-to-cd-and-zn
#3
Blanca Montalbán, Sofie Thijs, Mª Carmen Lobo, Nele Weyens, Marcel Ameloot, Jaco Vangronsveld, Araceli Pérez-Sanz
Plant growth promoting endophytic bacteria (PGPB) isolated from Brassica napus were inoculated in two cultivars of Helianthus tuberosus (VR and D19) growing on sand supplemented with 0.1 mM Cd or 1 mM Zn. Plant growth, concentrations of metals and thiobarbituric acid (TBA) reactive compounds were determined. Colonization of roots of H. tuberosus D19 by Pseudomonas sp. 262 was evaluated using confocal laser scanning microscopy. Pseudomonas sp. 228, Serratia sp. 246 and Pseudomonas sp. 262 significantly enhanced growth of H...
September 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28933563/effects-of-exogenously-applied-salicylic-acid-and-putrescine-alone-and-in-combination-with-rhizobacteria-on-the-phytoremediation-of-heavy-metals-and-chickpea-growth-in-sandy-soil
#4
Naeem Khan, Asghari Bano
The present attempt was made to study the role of exogenously applied salicylic acid (SA) and putrescine (Put) on the phytoremediation of heavy metal and on the growth parameters of chickpea grown in sandy soil. The SA and Put were applied alone as well as in combination with plant growth promoting rhizobacteria (PGPR). The PGPRs, isolated from the rhizosphere of chickpea were characterized on the basis of colony morphology and biochemical traits through gram staining, catalase and oxidase tests, and identified by 16S-rRNA gene sequencing as Bacillus subtilis, Bacillus thuringiensis and Bacillus megaterium...
September 21, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28932218/alleviation-of-heavy-metal-stress-in-plants-and-remediation-of-soil-by-rhizosphere-microorganisms
#5
REVIEW
Jitendra Mishra, Rachna Singh, Naveen K Arora
Increasing concentration of heavy metals (HM) due to various anthropogenic activities is a serious problem. Plants are very much affected by HM pollution particularly in contaminated soils. Survival of plants becomes tough and its overall health under HM stress is impaired. Remediation of HM in contaminated soil is done by physical and chemical processes which are costly, time-consuming, and non-sustainable. Metal-microbe interaction is an emerging but under-utilized technology that can be exploited to reduce HM stress in plants...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28929800/microcosm-investigation-of-growth-and-phytoremediation-potential-of-azolla-japonica-along-nitrogen-gradients
#6
Hun Park, Uhram Song
Although Azolla species are among the most promising plants for use in phytoremediation, more studies on their growth and nitrogen (N) uptake along the N gradients of growing media are required. In this study, N concentration-dependent growth in growing media and phosphorus (P) and N accumulation by Azolla japonica were studied by estimating direct N uptake from media by molybdenum-iron proteins. The doubling time of A. japonica was less than a week, regardless of the N concentration (0, 5, and 25 mg N/L) present in the growth media, indicating that this plant is suitable for remediation...
October 3, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28925326/a-nitrogen-transformation-model-for-multi-layer-enhanced-groundwater-remediation-technology
#7
Yu Yang, Zhifei Ma, Yonghai Jiang, Xinying Lian, Beidou Xi, Yu Pei
The multi-layer enhanced groundwater remediation technology (MET) is an innovative platform that integrates physical chemistry, bioremediation, and phytoremediation technology to safely and effectively remediate ammonia nitrogen in groundwater. A nitrogen transformation model was established to study the mechanism of nitrogen transformation within ammonia nitrogen removal in the MET. The model considered organic nitrogen, ammonia nitrogen, and nitrate nitrogen as the variables, and ammonification, nitrification, denitrification, microbial assimilation, plant absorption, adsorption-desorption, and volatilization as the influencing factors...
September 19, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28923725/petroleum-degradation-by-endophytic-streptomyces-spp-isolated-from-plants-grown-in-contaminated-soil-of-southern-algeria
#8
Hafida Baoune, Aminata Ould El Hadj-Khelil, Graciela Pucci, Pedro Sineli, Lotfi Loucif, Marta Alejandra Polti
Petroleum hydrocarbons are well known by their high toxicity and recalcitrant properties. Their increasing utilization around worldwide led to environmental contamination. Phytoremediation using plant-associated microbe is an interesting approach for petroleum degradation and actinobacteria have a great potential for that. For this purpose, our study aimed to isolate, characterize, and assess the ability of endophytic actinobacteria to degrade crude petroleum, as well as to produce plant growth promoting traits...
September 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28918276/phytoremediation-of-soil-co-contaminated-with-cd-and-bde-209-using-hyperaccumulator-enhanced-by-am-fungi-and-surfactant
#9
Hui Li, Xing Li, Lei Xiang, Hai Ming Zhao, Yan Wen Li, Quan Ying Cai, Li Zhu, Ce Hui Mo, Ming Hung Wong
Pot experiments were conducted to investigate the uptake and translocation of both Cd and decabromodiphenyl ether (BDE-209) in Solanum nigrum, under the treatments of two arbuscular mycorrhizal fungi [AMF, Funneliformis mosseae (FM) and Rhizophagus intraradices (RI)] and surfactant β-cyclodextrin (β-CD). Results showed that S. nigrum treated with either FM or β-CD significantly elevated shoot biomass and Cd concentrations and contents in shoots. The concentrations of BDE-209 in shoots and the dissipation and debromination efficiencies of BDE-209 in soil were significantly enhanced in S...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918247/erato-polymnioides-a-novel-hg-hyperaccumulator-plant-in-ecuadorian-rainforest-acid-soils-with-potential-of-microbe-associated-phytoremediation
#10
Irene Chamba, Daniel Rosado, Carolina Kalinhoff, Selvaraj Thangaswamy, Aminael Sánchez-Rodríguez, Manuel Jesús Gazquez
Mercury (Hg) accumulation capacity was assessed in three plant species (Axonopus compressus, Erato polymnioides, and Miconia zamorensis) that grow on soils polluted by artisanal small-scale gold mines in the Ecuadorian rainforest. Individuals of three species were collected at two sampling zones: i) an intensive zone (IZ, 4.8 mg Hg kg(-1) of soil) where gold extraction continues to occur, and ii) a natural zone (NZ, 0.19 mg Hg kg(-1) of soil). In addition, the percentage of arbuscular mycorrhizal fungi (AMF) colonization was determined in plant roots and seven fungal morphotypes isolated from rhizospheric soil...
August 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28914778/screening-for-autochthonous-phytoextractors-in-a-heavy-metal-contaminated-coal-mining-area
#11
Kuangjia Li, Zijian Lun, Lin Zhao, Qilong Zhu, Yansheng Gu, Manzhou Li
In order to protect public health and crops from soil heavy metal (HM) contamination at a coal mining area in Henan, central China, HM pollution investigation and screening of autochthonous HM phytoextractors were conducted. The concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in surface soils exceeded the corresponding local background values and the China National Standard (CNS). The maximum potential ecological risk (RI) was 627.30, indicating very high ecological risk. The monomial risk of Cd contributed the most to the RI, varying from 85...
September 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28905277/on-site-phytoremediation-applicability-assessment-in-alur-ilmu-universiti-kebangsaan-malaysia-based-on-spatial-and-pollution-removal-analyses
#12
Mohd Hafiyyan Mahmud, Khai Ern Lee, Thian Lai Goh
The present paper aims to assess the phytoremediation performance based on pollution removal efficiency of the highly polluted region of Alur Ilmu urban river for its applicability of on-site treatment. Thirteen stations along Alur Ilmu were selected to produce thematic maps through spatial distribution analysis based on six water quality parameters of Malaysia's Water Quality Index (WQI) for dry and raining seasons. The maps generated were used to identify the highly polluted region for phytoremediation applicability assessment...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28903604/remediation-of-contaminated-soils-by-biotechnology-with-nanomaterials-bio-behavior-applications-and-perspectives
#13
Xiaomin Gong, Danlian Huang, Yunguo Liu, Zhiwei Peng, Guangming Zeng, Piao Xu, Min Cheng, Rongzhong Wang, Jia Wan
Soil contamination caused by heavy metals and organic pollutants has drawn world-wide concern. Biotechnology has been applied for many years to the decontamination of soils polluted with organic and inorganic contaminants, and novel nanomaterials (NMs) has attracted much concern due to their high capacity for the removal/stabilization/degradation of pollutants. Recently, developing advanced biotechnology with NMs for the remediation of contaminated soils has become a hot research topic. Some researchers found that bioremediation efficiency of contaminated soils was enhanced by the addition of NMs, while others demonstrated that the toxicity of NMs to the organism negatively influenced the repair capacity of polluted soils...
September 13, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28898773/increased-accumulation-of-pb-and-cd-from-contaminated-soil-with-scirpus-triqueter-by-the-combined-application-of-nta-and-apg
#14
Xiaoxin Hu, Xiaoyan Liu, Xinying Zhang, Liya Cao, Jing Chen, Hang Yu
Phytoremediation of heavy metals contaminated soils shows many advantages and it can be improved by adding chelating agents and surfactants. In this study, pot culture experiments were set up to explore the effect of alone application of nitrilotriacetic acid (NTA) and combined application of NTA and alkyl polyglucoside (APG) on changes in absorption and adsorption of heavy metals by root of Scirpus triqueter and bioaccumulation of metals in single or co-contamination. Different additives were added into the soils artificially after 10 d and heavy metals extracted from different plant tissues were analyzed after 60 d...
September 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28898278/transcriptome-analysis-of-phytolacca-americana-l-in-response-to-cadmium-stress
#15
Yongkun Chen, Junkai Zhi, Hao Zhang, Jian Li, Qihong Zhao, Jichen Xu
Phytolacca americana L. (pokeweed) has metal phytoremediation potential, but little is known about its metal accumulation-related genes. In this study, the de novo sequencing of total RNA produced 53.15 million reads covering 10.63 gigabases of transcriptome raw data in cadmium (Cd)-treated and untreated pokeweed. Of the 97,502 assembled unigenes, 42,197 had significant matches in a public database and were annotated accordingly. An expression level comparison between the samples revealed 1515 differentially expressed genes (DEGs), 923 down- and 592 up-regulated under Cd treatment...
2017: PloS One
https://www.readbyqxmd.com/read/28890992/performance-of-five-plant-species-in-removal-of-nitrogen-and-phosphorus-from-an-experimental-phytoremediation-system-in-the-ningxia-irrigation-area
#16
Chongjuan Chen, Tiancheng Zhao, Ruliang Liu, Liangguo Luo
Agricultural non-point source (ANPS) pollution is an important contributor to elevated nitrogen (N) and phosphorus (P) in surface waters, which can cause serious environmental problems. Considerable effort has therefore gone into the development of methods that control the ANPS input of N and P to surface waters. Phytoremediation has been extensively used because it is cost-effective, environmentally friendly, and efficient. The N and P loads from agricultural drainage are a potential threat to the water quality of the Yellow River in Ningxia, China...
September 10, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28886557/the-phytoremediation-potential-of-plectranthus-neochilus-on-2-4-dichlorophenoxyacetic-acid-and-the-role-of-antioxidant-capacity-in-herbicide-tolerance
#17
Bruna Piaia Ramborger, Claudia Alves Ortis Gularte, Daniela Teixeira Rodrigues, Mateus Cristofari Gayer, Murilo Ricardo Sigal Carriço, Matheus Chimelo Bianchini, Robson Luiz Puntel, Elton Luis Gasparotto Denardin, Rafael Roehrs
The possible phytoremediation capacity of Plectranthus neochilus (boldo) exposed to the commercial pesticide (Aminol) in soil and water through consecutive extractions (days interval) was evaluated. After the exposure period, tea leaves from the plant were analyzed in terms of the presence of 2,4-D, total antioxidant capacity (DPPH), concentration of total polyphenols and flavonoids for plants exposed to soil and water. In water, 2,4-D remained up to 67% in the 60 days of experiment in the control group, which provided the use of two treatment groups with the plant (one group of plants for 30 days and another group in the remaining 30 days in the same system), thus, a decontamination up to 49% of the 2,4-D was obtained in this system with water...
August 31, 2017: Chemosphere
https://www.readbyqxmd.com/read/28881242/comparison-of-three-types-of-oil-crop-rotation-systems-for-effective-use-and-remediation-of-heavy-metal-contaminated-agricultural-soil
#18
Yang Yang, Xihong Zhou, Boqing Tie, Liang Peng, Hongliang Li, Kelin Wang, Qingru Zeng
Selecting suitable plants tolerant to heavy metals and producing products of economic value may be a key factor in promoting the practical application of phytoremediation polluted soils. The aim of this study is to further understand the utilization and remediation of seriously contaminated agricultural soil. In a one-year field experiment, we grew oilseed rape over the winter and then subsequently sunflowers, peanuts and sesame after the first harvest. This three rotation system produced high yields of dry biomass; the oilseed rape-sunflower, oilseed rape-peanut and oilseed rape-sesame rotation allowed us to extract 458...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28875431/concurrent-uptake-and-metabolism-of-dyestuffs-through-bio-assisted-phytoremediation-a-symbiotic-approach
#19
Uruj Tahir, Sana Sohail, Umair Hassan Khan
Manipulation of bio-technological processes in treatment of dyestuffs has attracted considerable attention, because a large proportion of these synthetic dyes enter into natural environment during synthesis and dyeing operations that contaminates different ecosystems. Moreover, these dyestuffs are toxic and difficult to degrade because of their synthetic origin, durability, and complex aromatic molecular structures. Hence, bio-assisted phytoremediation has recently emerged as an innovative cleanup approach in which microorganisms and plants work together to transform xenobiotic dyestuffs into nontoxic or less harmful products...
September 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28873664/complementarity-of-three-distinctive-phytoremediation-crops-for-multiple-trace-element-contaminated-soil
#20
Dominic Desjardins, Nicholas J B Brereton, Lilian Marchand, Jacques Brisson, Frédéric E Pitre, Michel Labrecque
Trace element (TE) contaminated land represents an important risk to the environment and to human health worldwide. These soils usually contain a variety of TEs which can be a challenge for plant-based remediation options. As individual plant species often possess a limited range of TE remediation abilities, functional complementarity principles could be of value for remediation of soil contaminated by multiple TEs using assemblages of species. Monocultures and polycultures of Festuca arundinacea, Medicago sativa and Salix miyabeana were grown for 4months in aged-polluted soil contaminated by Ag, As, Cd, Cr, Cu, Pb, Se and Zn...
August 30, 2017: Science of the Total Environment
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