PT - JOURNAL ARTICLE AU - J. O. Johnson AU - R. J. Weaver AU - D. F. Paige TI - Differences in the Mobilization of Assimilates of <em>Vitis Vinifera</em> L. Grapevines as Influenced by an Increased Source Strength AID - 10.5344/ajev.1982.33.4.207 DP - 1982 Jan 01 TA - American Journal of Enology and Viticulture PG - 207--213 VI - 33 IP - 4 4099 - http://www.ajevonline.org/content/33/4/207.short 4100 - http://www.ajevonline.org/content/33/4/207.full SO - Am J Enol Vitic.1982 Jan 01; 33 AB - Assimilate partitioning in whole plants was studied by giving carbon dioxide enrichment (CDE) to grapevines.The CDE treatments extended from 85-100(%) bloom through fruit maturation. The greater source strength (SoS) in the CDE-treated plants resulted in larger final dry weight of many of the vegetative parts and carbohydrate content of the leaves on vines carrying one or two clusters. The CDE treatments had no significant effect on total leaf area but enhanced fruit yield in the vines carrying two clusters. The CDE treatments significantly increased the rate of shoot growth but had no significant effect on root to shoot ratios and little effect on the (%) distribution of the total plant dry weight among the plant parts.