Project description:Lima bean is an important vegetable processing crop to the Mid-Atlantic U.S. and is highly susceptible to the oomycete pathogen Phytophthora phaseoli, which causes downy mildew. P. phaseoli resides in the same clade with the late blight pathogen, Phytophthora infestans. Genetic resistance and fungicides are used to manage P. phaseoli and often fail. Currently there are no molecular data on this pathosystem. To rectify this situation and determine virulence mechanisms in P. phaseoli we performed a whole-transcriptome analysis using Illumina mRNA-Seq. Six libraries were generated and compared, plate-grown and plant-grown. Our data were normalized and were matched to the P. infestans gene models to obtain the abundance of the sequence reads. This resulted in 10,427 P. phaseoli genes with homology to P. infestans and with expression in either one of the libraries. Upon closer examination, 318 P. phaseoli-homologs matched either known or putative virulence genes in P. infestans. We present data from the whole transcriptome as well as specifically chosen genes from this set of 318. Interestingly, in six libraries from P. phaseoli we found a commonly expressed gene set of 66 out of 563 predicted RXLR genes in P. infestans. The majority of the differentially expressed RxLR and elicitin-like were up-regulated in planta, while the reverse was true for crinkler homologs. These results are discussed with respect to possible pathogenicity mechanisms in P. phaseoli and how they compare to P. infestans. Examination of 3 different conditions of Phytophthora phaseoli
Project description:Lima bean is an important vegetable processing crop to the Mid-Atlantic U.S. and is highly susceptible to the oomycete pathogen Phytophthora phaseoli, which causes downy mildew. P. phaseoli resides in the same clade with the late blight pathogen, Phytophthora infestans. Genetic resistance and fungicides are used to manage P. phaseoli and often fail. Currently there are no molecular data on this pathosystem. To rectify this situation and determine virulence mechanisms in P. phaseoli we performed a whole-transcriptome analysis using Illumina mRNA-Seq. Six libraries were generated and compared, plate-grown and plant-grown. Our data were normalized and were matched to the P. infestans gene models to obtain the abundance of the sequence reads. This resulted in 10,427 P. phaseoli genes with homology to P. infestans and with expression in either one of the libraries. Upon closer examination, 318 P. phaseoli-homologs matched either known or putative virulence genes in P. infestans. We present data from the whole transcriptome as well as specifically chosen genes from this set of 318. Interestingly, in six libraries from P. phaseoli we found a commonly expressed gene set of 66 out of 563 predicted RXLR genes in P. infestans. The majority of the differentially expressed RxLR and elicitin-like were up-regulated in planta, while the reverse was true for crinkler homologs. These results are discussed with respect to possible pathogenicity mechanisms in P. phaseoli and how they compare to P. infestans.
Project description:Purpose: The goal of this study is compare the effect of phbC gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of phbC in Agrobacterium sp. CGMCC 11546. Results:The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔphbC mutants may be caused by the insufficient supply of energy ATP conclusion:phbC play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Purpose: The goal of this study is compare the effect of glnA gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of glnA in Agrobacterium sp. CGMCC 11546. Results: The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔglnA mutants may be caused by the insufficient supply of energy ATP conclusion: glnA play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Purpose: The goal of this study is compare the effect of MetH and MetZ gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of metH and metZ in Agrobacterium sp. CGMCC 11546. Results: The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔmetH and ΔmetZ mutants may be caused by the insufficient supply of energy ATP conclusion: MetH and MetZ play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Purpose: High throughput sequencing has revolutionized methods of microbial pathway analysis in response to various envoronmental stimuli. The aim of this study was to determine mechanisms in which Rhizobium phaseoli employ towards tolerance or resistance to aluminium toxicity through RNA sequencing. Methods: Total RNA was extracted from bacteria treated with aluminium after 48 hours with trizol and sequenced with illumina’s Miseq at Novogene Corporation Inc. U.K. After QC, reads were aligned to the genome with bowtie2 and differential expression performed with DESeq2. Results: Sequencing resulted to about 6.7-9.0 M reads that aligned to all the four plasmids and one chromosome of R. phaseoli genome. Most enriched genes were found localized in the membrane of the bacteria. Conclusion: The membrane of R. phaseoli is possibly the target site for toxicity and tolerance against aluminium toxicity. This is the first time such a study is described.