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Am. J. Enol. Vitic. 46:3:375-379 (1995)
Copyright © 1995 by the American Society for Enology and Viticulture.
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Effect of Temperature on Key Physiological Responses of Grapevine Leaf

F. Ferrini 1, G. B. Mattii 1, and F. P. Nicese 1

1 Università degli Studi di Firenze, Dipartimento di Ortoflorofrutticoltura, Via Donizetti, 6 - 50144 Firenze, Italy.

The effects of temperature on the physiological responses of self-rooted cv. Trebbiano grapevines in three growth chambers were studied at 20°C, 27.5°C, and 35°C and compared to those of control plants grown in open air. The parameters recorded were photosynthesis, transpiration, stomatal conductance monitored with an LCA 2 (ADC) infrared-gas analyzer, vine development, and leaf growth and chlorophyll content. The lowest net photosynthesis values were recorded in vines grown at 35°C and were closely correlated to chlorophyll content, the latter expressed per unit of leaf area; the effect of temperature on stomatal conductance was less marked. The accumulation of dry matter was correlated to average photosynthesis. The findings suggest that photosynthesis in plants grown at 35°C depends not on stomatal opening but on biochemical factors of an enzymatic nature.

Key words: grapevine development, leaf growth, stomatal conductance, photosynthesis, transpiration, chlorophyll

Submitted on April 18, 1994




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Cultural Practice and Environmental Impacts on the Flavonoid Composition of Grapes and Wine: A Review of Recent Research
Am. J. Enol. Vitic., September 1, 2006; 57(3): 257 - 268.
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Copyright © 1995 by the American Society for Enology and Viticulture.