6533b7ddfe1ef96bd1273f0d

RESEARCH PRODUCT

Changes in the Phytoalexin Content of Various Vitis Spp. in Response to Ultraviolet C Elicitation

Marielle AdrianAnne-céline Douillet-breuilPhilippe JeandetRoger Bessis

subject

Time FactorsPterostilbeneUltraviolet RaysResveratrolTerpenechemistry.chemical_compoundPhytoalexinsBotanyVitis cinereaFood sciencewine.grape_varietyRosalesPiceidchemistry.chemical_classificationbiologyPlant ExtractsTerpenesPhytoalexinfood and beveragesRosalesGeneral Chemistrybiology.organism_classificationchemistrywineGeneral Agricultural and Biological SciencesRootstockSesquiterpenes

description

The phytoalexin production potential of three American Vitis species and that of three cultivars of Vitis vinifera were evaluated in response to UV-C irradiation. Time course changes in resveratrol, piceid, epsilon-viniferin, and pterostilbene contents were studied within 3 days after a short UV-C irradiation. Results show that the two major stilbenes accumulated as a response to UV-C elicitation are resveratrol and epsilon-viniferin, a resveratrol dehydrodimer, the concentration of both compounds usually reaching quantities >100 microgram/g of fresh weight. In contrast, piceid and pterostilbene were constantly produced in low quantities. Owing to the results obtained, the role of stilbene phytoalexins in the resistance of grapevines to diseases is discussed.

yearjournalcountryeditionlanguage
1999-12-10Journal of Agricultural and Food Chemistry
https://doi.org/10.1021/jf9900478