Effect of water stress and rootstock genotype on Pinot Noir berry composition. (16th September 2014)

• Record Type: Journal Article
• Authors: Berdeja, M.; Hilbert, G.; Dai, Z.W.; Lafontaine, M.; Stoll, M.; Schultz, H.R.; Delrot, S.
• Is Part Of: Australian journal of grape and wine research. Volume 20:Number 3(2014:Oct.)
• Page Start: 409
• Page End: 421
• Publication Date: 2014-09-16
• Subjects: Viticulture -- Australia -- Periodicals; Wine and wine making -- Australia -- Periodicals; Viticulture -- Periodicals; Wine and wine making -- Periodicals; 634.80994
• DOI: 10.1111/ajgw.12091
• Languages: English
• ISSNs: 1322-7130

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="ajgw12091-sec-0001" sec-type="section"> <title>Background and Aims</title> <p>Grape berry growth and composition depend on complex interactions between the genotypes of the rootstock and the scion, vineyard management and environmental factors. The present work aimed to characterise the effect of rootstock genotype and water deficit on the primary and secondary metabolism of the grape berry.</p> </sec> <sec id="ajgw12091-sec-0002" sec-type="section"> <title>Methods and Results</title> <p> <italic>V</italic> <italic>itis vinifera</italic> cv. Pinot Noir grafted on either rootstock 110R (drought tolerant, mid to high vigour) or 125AA (drought sensitive, high vigour) was studied during three growing seasons in the field under normal rainfall or water shortage conditions. Water status, yield and berry composition (sugars, organic acids, free amino acids and anthocyanins) were measured throughout berry development during the three growing seasons. Water stress did not significantly affect berry mass, yield, sugar and organic acids concentration, but increased anthocyanin concentration of the berries regardless of the rootstock. Furthermore, the data showed that the berry amino acid concentration at harvest depended on interactions between water supply and rootstocks.</p> </sec> <sec id="ajgw12091-sec-0003" sec-type="section"> <title>Conclusions</title> <p>Scion berry composition differed only slightly between the two rootstocks tested. Rootstocks and water stress, however, affected the concentration of amino acids, and plants grafted onto 125AA were more sensitive to drought stress.</p> </sec> <sec id="ajgw12091-sec-0004" sec-type="section"> <title>Significance of the Study</title> <p>This work provides novel insights into the response of grape berry metabolites to rootstock and to drought in a changing environment.</p> </sec> </abstract>