Regeneration in Leaf Cuttings of Ipomoea Batatas

Abstract

1. Six different types of sweet potato leaf cuttings were rooted and observed until plants were regenerated. A seventh type was discarded after roots regenerated but before shoots were formed. 2. All types of cuttings regenerated roots quickly. 3. When the leaf blade was removed from a rooted leaf cutting the remaining petiole had the power to regenerate a shoot. 4. Leaf blades or parts of leaf blades with or without the petiole regenerated roots and shoots. 5. Cuttings regenerated shoots from the callus on the petiole, from fibrous roots, from fleshy roots, or from more than one of these points. 6. Leaf blade cuttings produced most of the roots out of the midrib and veins, the former showing the greater development. 7. In some cuttings potatoes were produced directly on or out of the petiole or reduced midrib. 8. Entire petioles or reduced petioles of cuttings from a non-pigmented variety enlarged and served as a place of storage. These failed to differentiate shoots or did so very slowly. 9. Leaf cuttin...