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Identification of differentially expressed genes that function in early response to cold stress in Vitis amurensis

ABSTRACT: We report the RNAseq technology for high-throughput profiling of differentially expressed genes after cold treatment in Vitis amurensis

ORGANISM(S): Vitis amurensis

PROVIDER: GSE122382 | GEO | 2021/11/09

REPOSITORIES: GEO

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Project description:The growth and fruit quality of grapevine are widely affected by abnormal climatic conditions such as extreme temperature. But how grapevine responds to cold stress is still largely unknown. Here we found that VaMyb14, a member of R2R3 Myb transcription factor family, was up-regulated dramatically during cold, drought and salinity treatments in Vitis amurensis, a cold and drought-hardiness wild Vitis species. Overexpression VaMyb14 in Arabidopsis increased antioxidant enzyme activity, especially POD activity, than that of the wild type and decreased the MDA content. A series of ABA metabolism and signal transduction genes in transgenic Arabidopsiswere were up-regulated in microarry results, including several nsLTPs, PP2Cs, RD29B, COR78 and other structural genes, suggesting that VaMyb14 not only affect the ABA signaling pathways, but also activates the CBF-COR independent nsLTP genes. Collectively, these results illustrate that Vitis Myb14 could represent a node of convergence regulating grapevine stress responses, including improve defence induced phytoalexin resveratrol against necrotrophic as well as drought and/or cold stress tolerance, highlighting Myb14 as a potential gene resource in future grapevine breeding.

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Project description:The growth and fruit quality of grapevine are widely affected by abnormal climatic conditions such as water deficit. But how grapevine responds to drought stress is still largely unknown. Here we found that VaNAC26, a member of NAC transcription factor family, was up-regulated dramatically during cold, drought and salinity treatments in Vitis amurensis, a cold and drought-hardiness wild Vitis species. Ectopic overexpression of VaNAC26 enhanced the drought and salt tolerances in transgenic Arabidopsis. Higher activities of antioxidant enzymes and the lower concentration of H2O2 and O2- were found in VaNAC26-OE lines than in wild type plants under drought stress. These results indicate that the reactive oxygen species (ROS) scavenging was enhanced by VaNAC26 in transgenic lines. Microarray based transcriptome analysis reveals that genes related to jasmonic acid (JA) synthesis and signaling were up-regulated in VaNAC26-OE lines under both normal and drought conditions. VaNAC26 showed a specific binding ability on NACRS motif, which was broadly existent in the promoter regions of up-regulated genes in transgenic lines. Endogenous JA content was found increased obviously in VaNAC26-OE-2/3 lines. Our data suggests that VaNAC26 responds to abiotic stresses and may enhance the drought tolerance by transcriptional regulation of JA synthesis in Arabidopsis.

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