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ABSTRACT: Microbial detoxification study of gossypol

PROVIDER: PRJNA1035497 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26720968_1.fastq.gz	Fastqsanger.gz
	SRR26720968_2.fastq.gz	Fastqsanger.gz
	SRR26720969_1.fastq.gz	Fastqsanger.gz
	SRR26720969_2.fastq.gz	Fastqsanger.gz
	SRR26720970_1.fastq.gz	Fastqsanger.gz

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Helicoverpa armigera gene expression on gossypol suppelemented diet, larval gut and rest of body

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Heliothis virescens gene expression on gossypol suppelemented diet, larval gut and rest of body

Project description:The transcriptional response of H. virescens larvae was analyzed after feeding on gossypol supplemented diet, a toxic secondary metabolite produced in cotton plants, to detect potential detoxification enzymes possibly involved in detoxification of gossypol by H. virescens. A one-color microarray-based gene expression analysis was performed with Cy3 labeled cRNA of gut and rest of the body of H. virescens larvae that fed on 0.32% gossypol and control diet. For each treatment and tissue four biological replicates were used.

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Helicoverpa armigera gene expression on gossypol suppelemented diet, larval gut and rest of body

Project description:The transcriptional response of H. armigera larvae was analyzed after feeding on gossypol supplemented diet, a toxic secondary metabolite produced in cotton plants, to detect potential detoxification enzymes possibly involved in detoxification of gossypol by H. armigera. A one-color microarray-based gene expression analysis was performed with Cy3 labeled cRNA of gut and rest of the body of H. armigera larvae that fed on 0.016%, 0.16% gossypol and control diet. For each treatment and tissue four biological replicates were used.

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Project description:Gut and rest of body tissue from fifth instar larvae which fed for three days a diet containing different doses of gossypol. Transcriptional profiling comparing gut and rest of body samples for three gossypol concentrations (0%, 0.016%-hormetic dose & 0.16%-detrimental dose). Hormesis is a biphasic biological response characterized by the stimulatory effect at relatively low amounts of chemical compounds otherwise known to be detrimental at higher concentrations. A hormetic response in larval growth rates has been observed in cotton-feeding insects in response to increasing concentrations of gossypol, a toxic metabolite found in the pigment glands of some Malvaceae plants. We investigated the developmental effect of gossypol in the cotton bollworm, Helicoverpa armigera, an important heliothine pest species, by exposing larvae to different doses of this metabolite in their diet. In addition, we sought to determine the underlying transcriptional responses to different gossypol doses. Larval weight gain, pupal weight and larval development time were measured in feeding experiments and a hormetic response was seen for the first two characters. On the basis of net larval weight gain responses to gossypol, three treatments, that is 0%, 0.016% and 0.16% gossypol , were selected for transcript profiling in the gut and the rest of the body in a two-color double reference design microarray experiment. Two-color double reference design. Reference sample was the 0% (CT) gossypol condition (either Gut or Rest of Body) or one of two experimental conditions {0.016(T5) and 0.16%(T7)}. Biological replicates: 4 (10 individuals per replicate). 32 samples total.

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Transcriptional responses underlying the hormetic and detrimental effects of gossypol on Helicoverpa armigera

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Project description:Cottonseed meal (CSM) contains a high amount of underutilised proteins due to the presence of gossypol, a toxic compound unsuitable for human consumption. We designed a protein extract process to generate CSM protein isolate (CSMPI) with ultra-low gossypol content to unlock their potential. This process utilised alkaline-based protein extraction with gossypol removal through a multistep acidified organic solvent treatment. Overall, our method successfully yielded 22% of CSMPI from CSM and achieved a protein purity of 92.6%. The method has reduced the free and total gossypol content of the post-treated CSMPI to 4.8ppm and 147.2ppm, respectively, which is much lower than the limit set by US FDA. Proteomics analysis indicated that the gossypol re-moval treatment increased protein identification and enhanced the nutritional quality of the CSMPI due to increased branched-chain amino acids (BCAAs) content after treatment. Overall, our results help to navigate and direct the application of CSMPI towards nutritive human food application.

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Molecular mechanism of zero valent iron-enhanced microbial azo reduction in Shewanella decolorationis S12

Project description:Here, we established a successive Fe0-enhanced microbe system to remove azo dye (a typical organic pollutant) by Shewanella decolorationis S12 (S. decolorationis S12, an effective azo dye degradation bacterium) and examined the gene expression time course (10, 30, 60, and 120 min) in whole genome transcriptional level. Comparing with the treatment without ZVI, approximately 8% genes affiliated with 10 different gene expression profiles in S. decolorationis S12 were significantly changed in 120 min during the ZVI-enhanced microbial azo reduction. Intriguingly, MarR transcriptional factor might play a vital role in regulating ZVI-enhanced azo reduction in the aspect of energy production, iron homeostasis, and detoxification. Further investigation showed that induced [Ni-Fe] H2ase genes (hyaABCDEF) and azoreductase genes (mtrABC-omcA) contributed to ZVI-enhanced energy production, while reduced iron uptake (hmuVCB and feoAB), induced sulfate assimilation (cysPTWA) and cysteine biosynthesis (cysM) related genes were essential to iron homeostasis and detoxification. This study disentangles underlying mechanisms of ZVI-enhanced azo reduction in S. decolorationis S12 and lays a foundation for further optimization of integrated ZVI-microbial system for efficient organic pollution treatment.

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