Leaf Interveinal Distances Corresponding to Anatomical Types in Grasses

Considerable variation in the interveinal distances in leaves was observed in both C3 and C4 grass species. In C4 species, interveinal distances of the Mestome Sheath type (89.0 μm) were smaller than those of the Parenchyma Sheath type (140.0 μm). In contrast, non-Kranz type (C3 species) had the largest interveinal distances of all the anatomical types. Variation in the interveinal distances of leaves of grasses is discussed in relation to photosynthetic ability and water use.