Abstract
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.
- Received April 1994.
- Copyright 1995 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.