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Active 2,4-DCP degraders in drilosphere and agricultural soil

ABSTRACT: Hitherto unknown active bacteria are involved in 2,4-dichlorophenol degradation in drilosphere and agricultural soil

PROVIDER: PRJEB2899 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR092269.fastq.gz	Fastqsanger.gz
	ERR092270.fastq.gz	Fastqsanger.gz
	ERR092271.fastq.gz	Fastqsanger.gz
	ERR092272.fastq.gz	Fastqsanger.gz
	ERR092273.fastq.gz	Fastqsanger.gz

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Nontarget-site resistance due to rapid physiological response in 2,4-D resistant Conyza sumatrensis: Reduced 2,4-D translocation and auxin-induced gene expression

Project description:We used RNAseq to quantify trascript expression from three populations of Conyza sumatrensis before and 5 hours after treatment with 2,4-D. This study investigates different responses between a 2,4-D resistant biotype compared to a 2,4-D sensitive biotype.

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Insights into ROS-dependent signalling underlying transcriptomic plant responses to the herbicide 2,4-D

Project description:The synthetic auxin 2,4-dichlorophenoxyacetic acid (2,4-D) functions as an agronomic weed control herbicide. High concentrations of 2,4-D induce plant growth defects, particularly leaf epinasty and stem curvature. Although the 2,4-D phenotype is associated with ROS production, little is known about ROS-dependent signalling. In this study, by using T-DNA Arabidopsis mutants to silence peroxisomal acyl CoA oxidase 1 (acx1-2), we identified ACX1 as one of the main sources of ROS production and as partly the cause of the epinasty phenotype following the application of 2,4-D. Transcriptomic analyses of WT plants after treatment with 2,4-D revealed a ROS-related peroxisomal footprint in early plant responses, while other organelles, such as mitochondria and chloroplasts, are involved in later responses. Interestingly, a group of ACX1-dependent transcripts in plant responses to 2,4-D, previously associated with epinasty, is related to auxin biosynthesis, metabolism and signalling. We found that protein AUXIN SIGNALING F-BOX 3 (AFB3), a component of SCF (ASK-cullin-F-box) E3 ubiquitin ligase complexes, which functions as an auxin receptor and mediates Aux/IAA proteasomal degradation, acts downstream of ACX1 and is involved in the epinasty phenotype induced by 2,4-D. We also found that protein degradation associated with ubiquitin E3-RING and E3-SCF-FBOX in ACX1-dependent signalling in plant responses to 2,4-D is significantly regulated over longer treatment periods.

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Project description:This experiment was annotated by TAIR (http://www.arabidopsis.org). In this experiment we examined whole genome response to herbicidal levels of 2,4-D application. Arabidopsis plants (14 days) grown in vitro on MS medium in petri dishes were flooded with 1 mL stock of 2,4-D to enable root uptake. Plants were treated with 1.0 mM 2,4-D for a period of 1 hour immediately after which RNA was extracted and used for the microarray based experiments. the goal of this study was to explore the herbicidal mode of action of auxinic herbicide 2,4-D. Experimenter name = Chitra Raghavan Experimenter department = Trevor Stevenson Laboratory Experimenter institute = IRRI Experimenter address = Entomology and Plant Pathology Division IRRI Experimenter zip/postal_code = Manila 4031 Experimenter country = Philippines Keywords: compound_treatment_design

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Combined Toxicity of 2,4-Dichlorophenoxyacetic Acid and Its Metabolites 2,4-Dichlorophenol (2,4-DCP) on Two Nontarget Organisms.

Project description:2,4-Dichlorophenoxyacetic acid (2,4-D), a phenoxyalkanoic acid herbicide, is among the most widely distributed pollutants in the environment. 2,4-Dichlorophenol (2,4-DCP), as the main metabolite of 2,4-D, always accompanies 2,4-D. In this paper, we did research on the combined toxicities of 2,4-D and 2,4-DCP to Vibrio qinghaiensis sp.-Q67 (Q67) and Caenorhabditis elegans. It was found that the toxicity of 2,4-DCP is more severe than that of its parent 2,4-D at any concentration levels whether to Q67 or to C. elegans. Furthermore, 2,4-DCP to Q67 has the time-dependent toxicity. The toxicity of the mixture of 2,4-D and 2,4-DCP to Q67 is increasing with the exposure time, but that to C. elegans does not change over time. There is a good linear relationship between the pEC50/pLC50 value of binary mixture ray of 2,4-D and 2,4-DCP and the mixture ratio of 2,4-DCP, which implies the predictability of mixture toxicity of 2,4-D and 2,4-DCP. The toxicological interactions of the binary mixtures to Q67 are basically additive actions whether at 0.25 or at 12 h. However, most mixtures have antagonistic interactions against C. elegans.

| S-EPMC6648169 | biostudies-literature

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Project description:Large-scale toxicogenomic screening approaches offer great promise for generating a bias-free, system-wide view of toxicological effects and modes-of-action of chemicals and ecotoxicants. Early applications of microarray technology have identified relatively small groups of responding genes with which to define new targets for analysis by conventional means. We have trialled a more intensive approach to the design and interpretation of array experiments incorporating a balanced interwoven ANOVA design with higher levels of biological replication, a more thorough analysis of errors and false discovery rates, and an analysis of response patterns using gene networks. Zebrafish embryos were exposed to ecotoxicants representing different classes - 2,4-dichlorophenol (DCP), 3,4-dichloroaniline (DCA), pentachlorophenol (PCP), and cadmium chloride - at low concentrations producing a developmental disturbance to 10% of embryos, and half of this dose. Extracted RNA was then analysed on microarrays. Analysis revealed responses of 3000–5000 genes, which is 10–1000 times greater than previously reported, with significance at lower levels of fold-change. Some gene responses were common to multiple toxicants and others that were restricted to just one or two toxicants. The gene expression profiles for the different toxicants were distinctive, and analysis using network-based packages provides a high level of detail of affected processes, some of which were novel. This approach provides a more highly refined view of toxic effects, from which meaningful patterns of response can be discerned and related to functional deficits, and from which more reliable indicators of toxicological effect can be predicted.

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2007-10-09 | E-MEXP-865 | biostudies-arrayexpress

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