PT  - JOURNAL ARTICLE
AU  - Robert J. Weaver
AU  - Stanley B. Mccune
TI  - Influence of Light on Color Development in <em>Vitis Vinifera</em> Grapes
AID  - 10.5344/ajev.1960.11.4.179
DP  - 1960 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 179--184
VI  - 11
IP  - 4
4099  - http://www.ajevonline.org/content/11/4/179.short
4100  - http://www.ajevonline.org/content/11/4/179.full
SO  - Am J Enol Vitic.1960 Jan 01; 11
AB  - Tokay clusters were enclosed in black or brown waxed bags after berry set. No coloration developed in the absence of light, and only a small amount of color in the light that penetrated the brown bags. Bagged Thompson Seedless clusters warmed up more slowly during the first part of the day, and cooled off more slowly. Bagging had little or no effect on maturation. Tokay berries colored normally, even if subjected to darkness from the period of berry shatter to the time coloration begins. When light was excluded from portions of clusters by bagging or from portions of berries by wrapping in aluminum foil, only the exposed portions colored. Forty varieties of Vitis vinifera were bagged during the season of growth. All clusters colored about like the unbagged controls except Tokay and Sultanina Rose, which remained green in the dark, and Emperor, which developed only a slight pinkish tinge in the dark.