Project description:Transcriptome profiling by RNA sequencing determined the genome-wide patterns of expression of grape and N. parvum genes in stem (local) and leaf (distal) tissues during an extensive interaction time course.
Project description:Basal leaf removal has been widely practiced to increase cluster sunlight exposure, control berry rot and eventually improve grape berry quality. Early leaf removal performed in cool region appeared to benefit the accumulation of norisoprenoids and monoterpenes. However, effects of this canopy management and leaf moving on volatile profiles and transcriptome of grape berry in warm region characterized with strong sunshine and arid climate were paid less attention. To cope with multiple possible effects caused by global warming, researches in warm region are urgently needed to provide a guide for adjusting the sunlight exposure treatment to adapt the climate change.In Manas county of Xinjiang province, sunlight exposure treatments performed in this study resulted in decreased β-carotene and lutein, which mainly responsible for the reduced norisoprenoids in ripening grapes. Substrate competition due to the up-regulation of VvTPS-a and VvNCED3 may contribute to the decreased concentration of monoterpenes in exposed berries. The notable increased C6 alcohols in the grape berries treated by leaf removal applied at veraison (LR-V), was mainly attribute to the enhanced substrate availability of linoleic acid and linolenic acid together with the higher expression of VvLOXO and VvADH1. Free C6 aldehyde was reduced by half leaf removal applied at veraison (HLR-V), leaf moving at veraison (LM-V) and leaf removal applied at berry pepper-corn size (LR-PS). Moreover, transcriptomic analysis indicated that both LR-V and LM-V treated grape berry implemented multiple stress-mitigation strategies to acclimate the improved sunlight exposure. Interestingly, photosynthesis-related genes in grape berry were primarily up-regulated by LR-V as a consequence of carbohydrate source removal rather than improved sunlight exposure. Weighted gene co-expression network analysis (WGCNA) suggested that the genes encoding malate synthase and 3-oxoacyl-(acyl carrier protein) reductase show a significant correlation with the accumulation of C6 alcohol.
Project description:Heat stress is one of the primary abiotic stresses that limit crop production . Grape is a popular cultivated fruit with high economic value throughout the world, and whose growth and development is often influenced by high temperature. Alternative splicing (AS) is a widespread mechanism increasing transcriptome complexity and proteome diversity. We conducted high temperature treatments (35oC, 40oC and 45oC) on grapevines (Vitis vinifera), and assessed proteomic and transcriptomic (especially AS)changes in leaves. We found that nearly 70% of the genes were alternatively spliced under high temperature. Intron retention (IR), exon skipping (ES) and alternative donor/acceptor sites were markedly induced under different high temperatures. IR was the most abundant up- and down-regulated AS event; moreover, IR events at 40 and 45oC were far higher than those at 35oC. These results indicated AS, especially IR, is an important posttranscriptional regulatory during grape leaf responses to high temperature. Proteomic analysis showed that protein levels of the RNA binding proteins SR45, SR30, and SR34, and the nuclear ribonucleic protein U1A in grape leaves gradually rose as ambient temperature increased. The results also revealed why AS events occurred more frequently under high temperature in grape leaves. After integrating transcriptomic and proteomic data, we found that HSPs and some important transcript factors such as MBF1c and HSFA2 were mainly involved in heat tolerance in grape through up-regulating transcriptional and translational levels, and were especially modulated by AS. The results provide the first simultaneous evidence for grape leaf responses to high temperature at transcriptional, posttranscriptional and translational levels.
Project description:A 10 ul drop of B. cinerea spores prepared in half-strength commercial grape juice was placed in the middle of detached Arabidopsis leaves. A cock-borer of 6 mm diameter was used to harvest leaf discs starting from the edge of the lesion (close, 0-6 mm) and the edge of the first disc (away, 6-12 mm) 48 hr after inoculation. Control plants were inoculated with a 10 ul drop of half-strength commercial grape juice with no spores.
Project description:12plex_vitis_2011_02_48h - Biological question (15 lines max): Identification of grape genes regulated in response to resistance inducer treatments. This transcriptomic analysis should provide insight in the mode of action of the compounds under study and yield generic data relevant to grape defense reaction. The experiment took place in the greenhouse. Six week-herbaceous grape cutting (cv Marselan) were spray-treated with 5 resistance inducers, an adjuvant (used along with some inducers) and water as control. Plants were inoculated by Plasmopara viticola (downy midew) 24h post-treatment. We used 5 plants per treatment. Leaf samples were harvested 24h post-treatment and 48h post-inoculation. Three biological repetitions were done. Each hybridization experiment was performed in comparison with water.
Project description:12plex_vitis_2011-02 - 12plex_vitis_2011_02_48h - Biological question (15 lines max): Identification of grape genes regulated in response to resistance inducer treatments. This transcriptomic analysis should provide insight in the mode of action of the compounds under study and yield generic data relevant to grape defense reaction. - The experiment took place in the greenhouse. Six week-herbaceous grape cutting (cv Marselan) were spray-treated with 5 resistance inducers, an adjuvant (used along with some inducers) and water as control. Plants were inoculated by Plasmopara viticola (downy midew) 24 h post-treatment. We used 5 plants per treatment. Leaf samples were harvested 24 h post-treatment and 48 h post-inoculation. Three biological repetitions were done. Each hybridization experiment was performed in comparison with water.
2017-04-17 | GSE97699 | GEO
Project description:Grape leaf dark light treatment