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Disease resistance of Vitis spp. and the production of the stress metabolites resveratrol, ε-viniferin, α-viniferin and pterostilbene

1981; Academic Press; Volume: 18; Issue: 2 Linguagem: Inglês

10.1016/s0048-4059(81)80043-4

1876-7974

P. Langcake,

Sirtuins and Resveratrol in Medicine

The grapevine, Vitis vinifera, produces the stress metabolites resveratrol, ε-viniferin, α-viniferin and pterostilbene in response to infection. The latter 3 compounds are fungitoxic. The same stress metabolites are also produced by Vitis riparia. The relationship between the production of these stress metabolites and the resistance of V. riparia to the grapevine pathogens Botrytis cinerea (grey mould) and Plasmopara viticola (downy mildew) has been examined as -well as the age-related resistance of V. vinifera to B. cinerea. Attempts to determine the times, local sites and concentration at which these stress metabolites accumulate in relation to growth of the pathogen suggest that these stress metabolites are responsible for inhibiting growth of the pathogens in resistant interactions. In the resistance of V. riparia, ε-viniferin was generally the predominant component although α-viniferin was produced in appreciable quantities. In the age-related resistance of V. vinifera to B. cinerea, α-viniferin predominated. Despite the relatively high antifungal activity of pterostilbene, this compound appeared to play no role in the resistance of either species.