What question did this study set out to answer?

To determine the impact of fruit zone leaf removal on total and phenol-free grape glycoside concentrations across different training systems and seasons.

January 1, 1998American Journal of Enology and Viticulture

Effect of Fruit Zone Leaf Removal on Total Glycoconjugates and Conjugate Fraction Concentration of Riesling and Chardonnay (Vitis viniferaL.) Grapes

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To determine the impact of fruit zone leaf removal on total and phenol-free grape glycoside concentrations across different training systems and seasons.
Evaluated Riesling and Chardonnay grapevines across two distinct vineyard sites and two growing seasons.
Compared defoliated vines against non-defoliated control vines under low bilateral cordon and high bilateral cordon training systems.
Measured total and phenol-free grape glycosides in fruit harvested across four distinct dates.
Concentrations of both total and phenol-free glycosides were higher in fruit from leaf-pulled vines compared to control vines at three of the four harvest dates.
Phenol-free glycosides constituted an average of 80% of total glycosides in Riesling juice and 66% of total glycosides in Chardonnay juice.

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Implication

Field trial demonstrates increased total and phenol-free glycosides in defoliated Riesling and Chardonnay vines, indicating canopy management enhances aroma precursors.

Cite This Study

Zoecklein et al. (1998) studied this question.

synapsesocial.com/papers/6aa3105542636504bc7c25ff https://doi.org/10.5344/ajev.1998.49.3.259

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Implication

Field trial demonstrates increased total and phenol-free glycosides in defoliated Riesling and Chardonnay vines, indicating canopy management enhances aroma precursors.

Effect of Fruit Zone Leaf Removal on Total Glycoconjugates and Conjugate Fraction Concentration of Riesling and Chardonnay (Vitis viniferaL.) Grapes

Key Points

Discussion

Implication

Cite This Study

Effect of Fruit Zone Leaf Removal on Total Glycoconjugates and Conjugate Fraction Concentration of Riesling and Chardonnay (Vitis viniferaL.) Grapes

Key Points

Discussion

Implication

Cite This Study

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