Efffect of Shading on Gas Exchange of Cotton Leaves Under Conditions of Different Soil Water Contents

摘要

Effect of different shading levels (no-shading, 80/100 shading, and 40/100 shading) on photosynthetic and stomatal responses in cotton laves were investigated under conditions of different soil water contents in summer midday. All cotton leaves exhibited similar basic responses to shading, including decreased net photosynthetic rates, a tendency to decrease in transpiration rates, and increased stomatal conductance and intercellular CO_2 concentration.