Rumbaugh Arran C, Girardello Raul C, Cooper Monica L, Plank Cassandra, Kurtural S Kaan, Oberholster Anita
Department of Viticulture and Enology, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.
University of California Cooperative Extension, 1710 Soscol Avenue, Napa, CA 94559, USA.
Plants (Basel). 2021 Jul 31;10(8):1583. doi: 10.3390/plants10081583.
Grapevine red blotch virus (GRBV), the causative agent of grapevine red blotch disease, is widespread across the United States and causes a delay in ripening events in grapes. This study evaluates the effects of GRBV on Cabernet Sauvignon grape berry composition, grafted on two different rootstocks (110R and 420A) in two seasons (2016 and 2017). Total soluble solids, acidity, and anthocyanin concentrations were monitored through ripening and at harvest. Phenolic and volatile compounds were also analyzed at harvest to determine genotypic and environmental influences on disease outcome. Sugar accumulation through ripening was lower in diseased fruit (RB (+)) than healthy fruit across rootstock and season. GRBV impact was larger in 2016 than 2017, indicating a seasonal effect on disease expression. In general, anthocyanin levels and volatile compound accumulation was lower in RB (+) fruit than healthy fruit. Total phenolic composition and tannin content was higher in RB (+) fruit than healthy fruit in only 110R rootstock. Overall, GRBV impacted Cabernet Sauvignon grape composition crafted on rootstock 110R more than those crafted on rootstock 420A.
葡萄红环斑病毒（GRBV）是葡萄红环斑病的病原体，在美国广泛传播，会导致葡萄成熟过程延迟。本研究评估了GRBV对赤霞珠葡萄果实成分的影响，该葡萄嫁接在两种不同砧木（110R和420A）上，历经两个季节（2016年和2017年）。在葡萄成熟过程及收获时监测了总可溶性固形物、酸度和花青素浓度。在收获时还分析了酚类和挥发性化合物，以确定基因型和环境对病害结果的影响。在整个砧木和季节中，患病果实（RB(+)）成熟过程中的糖分积累低于健康果实。GRBV在2016年的影响比2017年更大，表明病害表现存在季节效应。总体而言，RB(+)果实中的花青素水平和挥发性化合物积累低于健康果实。仅在110R砧木上，RB(+)果实中的总酚成分和单宁含量高于健康果实。总体而言，GRBV对嫁接在110R砧木上的赤霞珠葡萄成分的影响比对嫁接在420A砧木上的更大。
