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Stomatal Density and Distribution in Agrostis as Influenced by Species, Cultivar, and Leaf Blade Surface and Position¹

Stomatal density and distribution were determined among species of Agrostis grown under the same environmental and cultural conditions. The species studied were A. canina L., A. palustria Huds., and A. tenuis Sibth. The Stomatal density varied significantly among the three species and among the five cultivars of A. palustris. Density and distribution of stomata also varied with the leaf blade surface and position. The adaxial leaf surface of ‘Penncross’ creeping bentgrass had approximately three times the Stomatal density of the abaxial surface. Stomata were distributed in parallel rows on the adaxial leaf blade surface and were scattered throughout the abaxial surface. Stomatal density was greatest on the youngest leaves.

Key Words: Agrosti canina • A. palustris • A. tenuis • Stomata

² Extension Associate and Professor, respectively, Department of Crop and Soil Sciences, Michigan State University, East Lansing, Mich. 48823.

Received for publication April 20, 1972.