Project description:Anim Genet. 2009 Feb;40(1):115-8. Epub 2008 Oct 17. Differentially expressed transcripts in adipose tissue between Korean native pig and Yorkshire breeds. Moon JK, Kim KS, Kim JJ, Choi BH, Cho BW, Kim TH, Lee CK. Division of Biotechnology, College of Life Sciences & Biotechnology, Korea University, Seoul, South Korea. We measured and compared the transcripts of adipose tissue from Korean native pig (KNP) and Yorkshire (YS) breeds to investigate breed-specific transcription changes. We employed both the Affymetrix porcine genome array and quantitative reverse transcription-polymerase chain reaction (qRT-PCR). We found eight genes showing significant changes between the two breeds. Based on a literature review, these genes were indicative of differences in extracellular structure density and differences in the potential to metabolize xenobiotic chemicals and lipids. The differentially expressed genes indicated that KNP has a lower extracellular structure density and a lower potential to metabolize xenobiotic chemicals than YS. PMID: 18945290
Project description:Complete submergence represses photosynthesis and aerobic respiration causing rapid mortality in most terrestrial plants, but some species have evolved traits allowing them to survive prolonged flooding. Here, we studied the response to submergence of two species and their F1 hybrid in the genus Rorippa, which is related to the model Arabidopsis. We showed that these species have high tolerance to complete, deep submergence, but R. sylvestris survived longer than R. amphibia and the F1 hybrid. While the former restricted growth upon submergence, the latter two genotypes showed induced stem and petiole elongation and had higher aerenchyma contents, indicative of a low oxygen escape strategy. Arabidopsis GeneChip microarrays were used for whole-genome transcript profiling of roots of young plants exposed to air or a 24-h submergence treatment, using a probe mask based on hybridisation of genomic DNA of both species to the arrays. The induction by the submergence treatment of genes involved in glycolysis and fermentation and repression of many energy consuming pathways was similar to the response to low oxygen of Arabidopsis and rice. Notably, sucrose synthases, glycolysis and fermentation genes were more strongly induced in the less tolerant R. amphibia than in R. sylvestris, which might indicate faster carbohydrate consumption of the former, while some genes involved in hydrogen peroxide scavenging were strongly and specifically induced in the latter. F1 hybrids showed a generally weaker response to submergence and an additive mode of gene action, which did not change by the submergence treatment. Experiment Overall Design: We used replicated clones of Rorippa amphibia, Rorippa sylvestris and their F1 hybrid. Plants were grown on sand in pots for three weeks, completely submerged in rain water for 24 h, or kept in air as a control. Three biological controls were collected per genotype, each consisting of a pool of three individuals. Roots were separated from the shoots, quickly rinsed and immediately frozen and used for RNA extraction and hybridization to Arabidopsis Ath1 GeneChips. Genomic DNA of Rorippa amphibia and Rorippa sylvestris was also hybridized to the GeneChips in order to filter out badly performing probes due to sequence divergences from Arabidopsis.