Submitted to: International Conference of Polyphenols
Publication Type: Proceedings
Publication Acceptance Date: 7/8/2008
Publication Date: 7/8/2008
Citation: Lee, J., Martin, R.R. 2008. Impact of Grapevine leafroll associated virus -2 and -3, on phenolic compounds: commercial vineyard example. International Conference of Polyphenols. 1:399-400.
Interpretive Summary: This proceeding summarized our findings regarding the impact of Grapevine leafroll associated viruses on phenolic compounds in ‘Pinot noir’ grapes from two commercially operating vineyards in Willamette Valley of Oregon. Results were reported at the XXIVth International Conference on Polyphenols.
Technical Abstract: This proceeding and presentation summarized our results concerning the impact of Grapevine leafroll associated viruses (GLRaVs) on phenolic compounds, and other fruit maturity indices, in ‘Pinot noir’ grapes grown in the Willamette Valley of Oregon, USA. Grape clusters were collected from two commercially managed vineyards for two growing seasons. Every sampled vine was tested for GLRaV-1, -2, -3, and Rupestris stem pitting-associated virus (RSPaV). All vines were infected with RSPaV. In general terms, GLRaV-2 and -3 infected vines produced fruit with reduced percent soluble solids and levels of anthocyanins (individual and total), and increased skin and pulp masses. No clear trends were observed in grape polyphenolics, other than anthocyanins. The combination of ‘Pinot noir’ clone 114 scion / Vitis riparia rootstock exhibited greater alteration in anthocyanins and fruit maturity indices from GLRaV infection than the other scion / rootstock combinations in the study (‘Pinot noir’ clone unknown / ‘Chardonnay’ interstock / unknown rootstock, and ‘Pinot noir’ clone Pommard / self rooted).