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Vitis vinifera strain:Cabernet sauvignon

ABSTRACT: Vitis vinifera strain:Cabernet sauvignon Transcriptome or Gene expression

PROVIDER: PRJNA227009 | ENA |

REPOSITORIES: ENA

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V. vinifera 'Cabernet sauvignon' and V. aestivalis 'Norton' innoculated with Erysiphe necator conidiospores

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Project description:Methods:transcriptomes of the different development stages of Vitis vinifera cv. Cabernet Sauvignon and Vitis quinquangularis accession Danfeng-2 were analyzed using Illumina Hiseq 2500. The sequence reads that passed quality filters were analyzed: TopHat followed by Cufflinks. mRNA profiles of different development stages of Vitis vinifera cv. Cabernet Sauvignon and Vitis quinquangularis accession Danfeng-2 were generated by deep sequencing, in triplicate, using Illumina Hiseq 2500.

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Light-induced variation in phenolic compounds in Cabernet Sauvignon grapes (Vitis vinifera L.) involves extensive transcriptome reprogramming of biosynthetic enzymes, transcription factors, and phytohormonal regulators

Project description:Light environments have long been known to influence grape (Vitis vinifera L.) berry development and biosynthesis of phenolic compounds, and ultimately affect wine quality. Here, the accumulation and compositional changes of hydroxycinnamic acids (HCAs) and flavonoids, as well as global gene expression were analyzed in Cabernet Sauvignon grape berries under sunlight exposure treatments at different phenological stages. Sunlight exposure did not consistently affect the accumulation of berry skin flavan-3-ol or anthocyanin among different seasons due to climatic variations, but increased HCA content significantly at véraison and harvest, and enhanced flavonol accumulation dramatically with its timing and severity degree trend. As in sunlight exposed berries, a highly significant correlation was observed between the expression of genes coding phenylalanine ammonia-lyase, 4-coumarate: CoA ligase, flavanone 3-hydroxylase and flavonol synthase family members and corresponding metabolite accumulation in the phenolic biosynthesis pathway, which may positively or negatively be regulated by MYB, bHLH, WRKY, AP2/EREBP, C2C2, NAC, and C2H2 transcription factors (TFs). Furthermore, some candidate genes required for auxin, ethylene and abscisic acid signal transductions were also identified which are probably involved in berry development and flavonoid biosynthesis in response to enhanced sunlight irradiation. Taken together, this study provides a valuable overview of the light-induced phenolic metabolism and transcriptome changes, especially the dynamic responses of TFs and signaling components of phytohormones, and contributes to the further understanding of sunlight-responsive phenolic biosynthesis regulation in grape berries.

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Project description:Salt tolerance in grapevine is associated with the exclusion of chloride ions (Cl–) from the shoot. The rate-limiting step for this process has been identified as the passage of Cl– between the root symplast and the xylem apoplast through membrane integral proteins. To identify candidate genes for these proteins we used a custom microarray to compare the root transcriptomes of three grapevine varieties (Vitis spp.) that differ in their capacity to exclude Cl– from shoots. When challenged with 50 mM Cl– there were transcriptional responses that differed across the rootstocks 140 Ruggeri (a good Cl– excluder) and K51-40 (a poor Cl– excluder), and Cabernet Sauvignon (an intermediate Cl– excluder and Vitis vinifera control). The magnitude of these salt-induced changes correlated with the amount of Cl– accumulated in shoots. Abiotic-stress responsive transcripts (e.g. heat shock proteins) were induced in 140 Ruggeri. Respiratory transcripts were repressed in Cabernet Sauvignon. Expression of hypersensitive response and ROS scavenging transcripts were altered in the sensitive K51-40. Despite these differences, no obvious candidate Cl– transporters were identified from the salt treatment. In contrast, under control conditions where differences in shoot Cl– exclusion between rootstocks were still significant, we identified a number of genes encoding putative ion channels including VvSLAH3, VvALMT1, and possible regulators of these proteins such as VvSnRK2.6 and calcium dependent protein kinases (CDPK) as being differentially expressed between rootstocks. Members of the low affinity nitrate transporter (NRT1), and chloride channel (CLC) families were also identified. We propose these as useful candidates for further study within breeding programs aimed at improving plant salt tolerance in grapevine and other crops.

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