Unknown,Transcriptomics,Genomics,Proteomics

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Differentially expressed genes following injection with miR-1 mimics of the silkworm, Bombyx mori, during pupation

ABSTRACT: The molting of insects is a complex biological progress which requires varies of genes to participate in the event. MicroRNAs are considered to be one of the key roles involved in development in many organisms. Microarray technology was employed to examine the expression profile of multiple genes after extrinsical up-regulation of miR-1 level by injection of miR-1 mimics in silkworm (Bombyx mori.L), which caused altered expression profile of numerous genes, especially those which involved in the processes of cuticle renewing and development. 814 genes were up-regulated and 636 were down-regulated after treated with miR-1 mimics, the rest 2961 detectable genes were considered to have no significant changes in expression level. Transcription profiling experiments, 3 pairs of samples (miR-1 injected and negative control) were analyzed. Dual-channel experiments, with control samples labeled by Cy5 and miR-1 injected samples labeled by Cy3. Fold change was calculated via comparing signal intensity of Cy3 vs Cy5. 3 biological replicates were performed.

ORGANISM(S): Bombyx mori

SUBMITTER: GAO Song

PROVIDER: E-GEOD-36034 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Comparative analysis of tobacco leaves transcriptomes unveils carotenoid pathway potentially determined the characteristics of aroma compounds in different environmental regions. Tobacco (Nicotiana tabacum) is a sensitive crop to environmental changes, and a tobacco with unique volatile aroma fractions always formed in specific ecological conditions. In order to investigate the differential expressed genes caused by environmental changes and reveal the formation mechanism of characteristics of tobacco in three different aroma tobacco regions of Guizhou Province, Agilent tobacco microarray was adapted for transcriptome comparison of tobacco leaves in medium aroma tobacco region Kaiyang and light aroma tobacco regions Weining and Tianzhu. Results showed that there was big difference among the gene expression profiles of tobacco leaves in different environmental conditions. A total of 517 differential expressed genes (DEGs) between Weining and Tianzhu were identified, while 733 and 1,005 genes differentially expressed between Longgang and another two tobacco regions Weining and Tianzhu, respectively. Compared with Longgang, up-regulated genes in Weining and Tianzhu were likely involved in secondary metabolism pathways, especially carotenoid pathway, including PHYTOENE SYNTHASE, PHYTOENE DEHYDROGENASE, LYCOPENE ε-CYCLASE, CAROTENOID β-HYDROXYLASE and CAROTENOID CLEAVAGE DIOXYGENASE 1 genes, while most down-regulated genes played important roles in response to temperature and light radiation, such as heat shock proteins. Gene Ontology and MapMan analyses demonstrated that the DEGs among different environmental regions were significantly enriched in light reaction of photosystem II, response of stimulus and secondary metabolism, suggesting they played crucial roles in environmental adaptation and accumulation of aroma compounds in tobacco plants. Through comprehensive transcriptome comparison, we not only identified several stress response genes in tobacco leaves from different environmental regions but also highlighted the importance of carotenoid pathway genes for characteristics of aroma compounds in specific growing regions. Our study primarily laid the foundation for further understanding the molecular mechanism of environmental adaptation of tobacco plants and molecular regulation of aroma substances in tobacco leaves. In order to investigate the differential expressed genes caused by environmental changes and reveal the formation mechanism of characteristics of tobacco in three different aroma tobacco regions of Guizhou Province, Agilent tobacco microarray was adapted for transcriptome comparison of tobacco leaves in medium aroma tobacco region Kaiyang and light aroma tobacco regions Weining and Tianzhu.

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Differentially expressed genes following injection with miR-1 mimics of the silkworm, Bombyx mori, during pupation

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