PT  - JOURNAL ARTICLE
AU  - F. Ferrini
AU  - G. B. Mattii
AU  - F. P. Nicese
TI  - Effect of Temperature on Key Physiological Responses of Grapevine Leaf
AID  - 10.5344/ajev.1995.46.3.375
DP  - 1995 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 375--379
VI  - 46
IP  - 3
4099  - http://www.ajevonline.org/content/46/3/375.short
4100  - http://www.ajevonline.org/content/46/3/375.full
SO  - Am J Enol Vitic.1995 Jan 01; 46
AB  - 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.