Phytochemical and molecular genetic characterization of factors influencing anthocyanin biosynthesis in grape (Vitis)
Pourquoi ce travail est dans la base
Une base qui oublie comment elle a trouvé un travail ne peut pas être vérifiée. Voici les voies qui ont admis celui-ci.
Notice bibliographique
Résumé
Grape ('Vitis') is one of the world's most important crops economically, with approximately 70% of the grapes used in winemaking. Over the past thirty years, viticulturists of the Niagara Peninsula in Ontario have replaced their native and hybrid vines with high-value ' Vitis vinifera' cultivars and the area under grapevine cultivation has increased dramatically. The research described in this dissertation investigated factors, both environmental and genetic, influencing anthocyanin biosynthesis in grape, with particular attention to improving the anthocyanin concentration and profiles of Ontario grapes. An improved high performance liquid chromatography method was developed allowing for more accurate detection and quantification of the complex profile of anthocyanins produced in grapes. This method led to detection of a novel anthocyanin compound in Concord grapes ('Vitis labrusca'). As an application of these improved analytical capabilities, the anthocyanin metabolite profiles of Cabernet Sauvignon and Cabernet Franc grapes grown in different Appellation regions within Ontario's Niagara Peninsula were examined, to simultaneously examine whether the anthocyanin profiles for each cultivar differed significantly between locations and years, and whether specific metabolite profiles correlate with the locations of these vineyards in relation to well-defined Appellation zones. While statistically significant differences in total anthocyanin levels could be correlated to Appellation zone, specific anthocyanin profiles could not, suggesting individual viticultural techniques are more important in determining anthocyanin quality than geography alone. While viticultural technique and Appellation influence anthocyanin biosynthesis, the greatest increases in grape anthocyanin concentrations are likely to be achieved via understanding the molecular genetics controlling anthocyanin biosynthesis. The genetic determinant of 'Teinturier' grapes, of interest for their generally intense colour, was also examined. It was determined that the 'Teinturier' trait encompasses two genetically distinct phenotypes, coloured mesocarp and coloured juice; to distinguish between them the latter was reclassified as the 'Claret ' trait. Novel 'MybA3'+'XY' alleles were found to be associated with the 'Teinturier' (coloured mesocarp) phenotype, both within a segregating experimental breeding population and in a collection of other 'Teinturier' cultivars. Results support a model in which anthocyanin accumulation depends on a balance between negative and positive regulators of transcription. These results increase our understanding of tissue-specific anthocyanin accumulation in grape berries and may facilitate the development of improved, high-anthocyanin cultivars.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle