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Lectin in Vegetative Tissues of Adult Barley Plants Grown under Field Conditions ¹

Laboratorium voor Plantenbiochemie, KULeuven, Kardinaal Mercierlaan 92, B-3030 Leuven, Belgium

A study of the distribution of lectins over different vegetative tissues of barley (Hordeum vulgare L.) plants, which were grown under normal crop conditions, indicated that lectin occurs in roots, leaves, and developing ears. Isolation and characterization of both root and leaf lectins led to the conclusions (a) that they are indistinguishable from the embryo lectin and (b) that the total lectin content of these vegetative organs is many times higher than that of the embryo. Finally, in vivo labeling experiments demonstrated that the lectin is synthesized de novo in roots and leaves.