Rootstock and mounding effect on growth and cold hardiness of ‘Gewürztraminer’ (Vitis vinifera) and bud dormancy of ‘Lacrosse’ and ‘Chambourcin’ (Vitis spp.)

作者：Siman Gu · 发表于：Lincoln (University of Nebraska) · 年份：2003 · 被引用次数：3 · 研究领域：Horticultural and Viticultural Research、Plant Physiology and Cultivation Studies、Fermentation and Sensory Analysis

Growth and cold hardiness of mounded/non-mounded ‘Gewürztraminer’ (Vitis. vinifera) on ‘Riparia Gloire’, ‘St. George’, ‘3309 Couderc’, ‘110 Richter’, ‘1103 Paulsen’ and ‘MG 420A’ were investigated. ‘Gewürztraminer’ grapevines responded differently to mild or harsh winter(s). Rootstocks did not significantly affect the vegetative growth of ‘Gewürztraminer’ vines regardless of winter types, but they modified cold hardiness of the scions. Scions on ‘3309 Couderc’ and ‘MG 420A’ were most cold hardy. Mounding protected ‘Gewürztraminer’ vines from winter cold and increased pruning weight significantly. Scions on mounded rootstocks ‘110 Richter’, ‘St. George’ and ‘ Riparia Gloire’ broke buds earlier than on the non-mounded rootstocks. Dormancy of one-year-old buds of Vitis spp. ‘Lacrosse’, ‘Chambourcin’ and ‘Chambourcin’/‘3309 Couderc’ were investigated. Grapevines in Nebraska may be at deep endodormancy in October and November, at shallow endodormancy in December and January, and at ecodormancy after February. ‘Lacrosse’ was less dormant than own-rooted ‘Chambourcin’, which was less dormant than grafted ‘Chambourcin’. Forcing solution did not increase budbreak of dormant grapevine buds. Plant growth regulators BA, IAA, GA3 and ABA included in the forcing solution delayed budbreak. SEM images of bud meristems showed that dormant buds were slowly growing during the dormant season. The dormant buds of grafted ‘Chambourcin’ were more advanced than those of own-rooted ‘Chambourcin’. Cro...