Melatonin content in grape: myth or panacea?

Auteur(s) :
Iriti M., Faoro F., Rossoni M.
Date :
Août, 2006
Source(s) :
Journal of the science of food and agriculture. #86:10 p1432-1438
Adresse :
Addresses: Faoro F (reprint author), CNR, Ist Virol Vegetale, Sez Milano, Via Celoria 2, I-20133 Milan Italy CNR, Ist Virol Vegetale, Sez Milano, I-20133 Milan Italy Univ Milan, Ist Patol Vegetal, I-20133 Milan Italy Univ Milan, Dipartimento Prod Vegetale, I-20133 Milan Italy E-mail Addresses: [email protected] Publisher: JOHN WILEY & SONS LTD, THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND, http://www.wileyinterscience.com

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Abstract: Melatonin (N-acetyl-5-methoxytryptamine) was detected by a modified HPLC method and ELISA tests in extracts of eight different Vitis vinifera cultivars, namely Nebbiolo, Croatina, Sangiovese, Merlot, Marzemino, Cabernet Franc, Cabernet Sauvignon and Barbera. Its concentration varied greatly among the cultivars, being the highest in Nebbiolo (0.965 ng g(-1)) and Croatina (0.870 ng g(-1)). Field treatments of grapevine with the plant defence activator benzothiadiazole, greatly improved the melatonin content in berry skin extracts, indicating a possible strategy to raise the content of this important pharmaconutrient in plants, while inducing resistance to pathogens. The finding of this compound in grape suggests that the well-established pharmaconutritional properties of this fruit are due not only to the presence of polyphenolic nutraceuticals, such as resveratrol, anthocyanins and proanthocyanidins, but also to the powerful antioxidant activity of melatonin. (c) 2006 Society of Chemical Industry.
Author Keywords: Vitis vinifera; melatonin; grape; benzothiadiazole; BTH; nutraceuticals
KeyWords Plus: HYPERICUM-PERFORATUM L.; MEDICINAL-PLANTS; ORAL MELATONIN; EDIBLE PLANTS; BIOSYNTHESIS; TRYPTOPHAN; PATHWAY; BIOAVAILABILITY; QUANTIFICATION; METABOLISM

Source : Pubmed
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