<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kliewer, W. M.</style></author><author><style face="normal" font="default" size="100%">Schultz, H. B.</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Influence of Environment on Metabolism of Organic Acids and Carbohydrates in &lt;em&gt;Vitis Vinifera&lt;/em&gt;. II. Light</style></title><secondary-title><style face="normal" font="default" size="100%">American Journal of Enology and Viticulture</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1964</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1964-01-01 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">119-129</style></pages><doi><style  face="normal" font="default" size="100%">10.5344/ajev.1964.15.3.119</style></doi><volume><style face="normal" font="default" size="100%">15</style></volume><issue><style face="normal" font="default" size="100%">3</style></issue><abstract><style  face="normal" font="default" size="100%">Radioactive CO2 was administered to shoots of White Riesling growing in the field af two stages of maturity and under three different light conditions: ful sunlight and shaded vines receiving approximately 20 and 30% of full sunlight. The amount of C14O2 incorporated into organic acids and sugars from both immature and nearly ripe berries grown under different light conditions was determined over a period of 32 to 80 hours.Berries from 21% sun had more label in the organic acid fraction and less in the sugar fractions than berries from 30% or 100% sun. The amount of C14O2 incorporated into malic acid was usually relatively greater from shaded berries; tartaric acid, on the other hand, contained a greater proportion of the label with 100% sun.Immature shaded berries contained a relatively greater amount of label in sucrose and a decreased amount in glucose and fructose, but this relationship was reversed in mature shaded berries. Mature shaded berries contained a relatively smaller amount of label in sucrose than unshaded berries. The proportion of activity in glucose and fructose was not greatly influenced by the amount of sun.</style></abstract></record></records></xml>