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Am. J. Enol. Vitic. 60:3:251-268 (2009)
Copyright © 2009 by the American Society for Enology and Viticulture.
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Influence of Grapevine Training Systems on Vine Growth and Fruit Composition: A Review

Andrew G. Reynolds1 and Justine E. Vanden Heuvel2,*

1 Professor, Cool Climate Oenology & Viticulture Institute, Brock University, St. Catharines, ON L2S 3A1, and 2 Assistant professor, Department of Horticultural Sciences and Department of Horticulture, Cornell University, Ithaca, NY 14853.

Acknowledgment: The authors thank Terry Bates for his assistance with this manuscript.

* Corresponding author (email: jev32{at}cornell.edu)

Training a grapevine involves a manipulation of vine form. The type of training may lead to differences in total leaf area and the percentage of leaf area well-exposed to light. Consequently, the ability for a grapevine to photosynthesize efficiently depends upon its training system and the accompanying light microclimate of its leaves. In addition to altering the light microclimate of the canopy, training may impact numerous other variables such as fruit bud differentiation, cluster exposure, vine water status, and leaf transpiration. Modification of vine training systems to achieve balance between vine vigor and yield has led to divided canopy systems that might simultaneously increase yield and improve fruit composition through optimization of canopy light microclimate. Consequently, many training systems have been identified as being capable of improving wine quality through a combination of enhanced canopy and fruit microclimate.

Key words: fruit composition, leaf area, photosynthesis, vine balance, yield






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Copyright © 2009 by the American Society for Enology and Viticulture.