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Ancestral chemotypes of cultivated grapevine with resistance to Botryosphaeriaceae-related dieback allocate metabolism towards bioactive stilbenes [in press]

Khattab, Islam M.; Sahi, Vaidurya P.; Baltenweck, R.; Maia-Grondard, A.; Hugueney, P.; Bieler, E.; Dürrenberger, M.; Riemann, Michael; Nick, Peter

Abstract:
- Grapevine trunk diseases have devastating consequences on vineyards worldwide. European wild grapevines (Vitis vinifera subs. sylvestris) from the last viable population in Germany along the Rhine river showed variable degrees of resistance against Neofusicoccum parvum (strain Bt‐67), a fungus associated with Botryosphaeriaceae‐related dieback.

- Representative genotypes from different subclades of this population were mapped with respect to their ability to induce wood necrosis, as well as their defence responses in a controlled inoculation system.

- The difference in colonization patterns could be confirmed by cryo‐scanning electron microscopy, while there was no relationship between vessel diameter and infection success. Resistant lines accumulated more stilbenes, that were in addition significantly partitioned to nonglycosylated viniferin trimers. By contrast, the susceptible genotypes accumulated less stilbenes with a significantly higher proportion of glycosylated piceid.

- We suggest a model in which in the resistant genotypes phenylpropanoid metabolism is channelled rapidly and specifically to the bioactive stilbenes. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000125680
Veröffentlicht am 05.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Botanisches Institut (BOTANIK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0028-646X, 1469-8137
KITopen-ID: 1000125680
Erschienen in The new phytologist
Vorab online veröffentlicht am 08.09.2020
Schlagwörter Neofusicoccum parvum, phenyl-propanoid pathway, piceid chemotype, resveratrol-viniferin chemotype, Vitis resistance
Nachgewiesen in Scopus
Web of Science
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