Differential Stomatal Response Between C3 and C4 Species to Atmospheric CO2 Concentration and Light1

作者：Shigemi Akita, Dale N. Moss · 发表于：Crop Science · 年份：1972 · DOI：10.2135/cropsci1972.0011183x001200060022x · 被引用次数：81 · 研究领域：Plant responses to elevated CO2、Plant Water Relations and Carbon Dynamics、Atmospheric chemistry and aerosols

Transpiration measurements were made on attached leaves of potted plants or on excised leaves of native plants of three C3 species—wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), and dandelion (Taraxacum officinale L.) — and three C4 species — maize (Zea mays L.), green foxtail (Setaria viridis L.), and pigweed (Amarranthus retroflexus L.) — in different CO2 concentrations and light intensities. The experiments were begun with leaves in CO2‐free air in light (0.4 cal cm−2 min−1, 400–700 nm) to open the stomata. Stomata of C3 species were less prone to closure than were stomata of C4 species as the light intensity was decreased or as the CO2 concentration was increased. The greater water use efficiency of C4 species may be due in part to the better control of water loss because the stomata are more responsive to environmental changes than are the stomata of C3 species.