Cells with Crystals of Calcium Oxalate in the Leaves of Phaseolus vulgaris — a Comparison with those in Canavalia ensiformis

Abstract

SummaryLeaflets of Phaseolus vulgaris contain crystals of calcium oxalate in the adaxial bundle sheath extensions. Most of the crystals accompany the lateral veins of third order. The average oxalate content of the leaves is 0.8% of dry weight. Some features of leaflet anatomy of Phaseolus and Canavalia are shown and the possible relation of anatomy to localization and development of crystals in each of the species is discussed. The majority of crystals in Phaseolus originate with the young leaflets newly unfolded. Calcium deficiency reduces number and size of crystals.