Project description:we analyzed pathogen-induced changes in the transcriptome of Vitis vinifera ‘Cabernet sauvignon’ and Vitis aestivalis ‘Norton’ by conducting a large-scale study to measure transcript abundance at 0, 4, 8, 12, 24, and 48 hours post-treatment in conidiospore- and mock-inoculated leaves using Affymetrix GeneChip Vitis vinifera Genome Array Keywords: time course
Project description:Cabernet Sauvignon plants grown in a hydroponic drip system were treat with 120 mM salt (10:1 NaCl:CaCl), Polyethylene Glycol, cold (5 C) or unstressed. Shoots with leaves were collected at 0, 1, 4, and 8 hours for all treatments, and at 24 hours for all except cold. ****[PLEXdb (http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Elizabeth Tattersall. The equivalent experiment is VV1 at PLEXdb.]
Project description:The abscisic acid (ABA) increase and auxin decline are both indicators of ripening initiation in grape berry, and norisoprenoid accumulation also start at around the onset of ripening. To investigate the transcriptional and posttranscriptional regulation of the ABA and synthetic auxin 1-naphthaleneacetic acid (NAA) on norisoprenoid production, we performed time series GC-MS and RNA-seq analyses on Cabernet Sauvignon grape berries from pre-veraison to ripening. Higher levels of free norisoprenoids were found in ABA-treated mature berries in two consecutive seasons, and both free and total norisoprenoids were significantly increased by NAA in one season. The expression pattern of known norisoprenoid-associated genes in all samples and the up-regulation of specific alternative splicing isoforms of VviDXS and VviCRTISO in NAA-treated berries were predicted to contribute to it. Combined weighted gene co-expression network analysis (WGCNA) and promoter motif prediction analysis suggested that GATA26 and GATA28 could be potential regulators of norisoprenoid accumulation. Finally, the network analysis uncovered the interaction between previously identified switch genes, hormone-related genes and norisoprenoid-associated genes.