Graft union formation in mango (Mangifera indica L.).
Asante A. K., Barnett J. R.
Author Affiliation: Department of Agricultural Botany, School of Plant Sciences, University of Reading, Whiteknights, P.O. Box 221, Reading RG6 6AS, UK.
Journal of Horticultural Science 72 : 781-790
Abstract : Graft union formation in mango cultivars Tommy Atkins and Keitt used reciprocally as scion and rootstock was studied using light microscopy. The initial wound response was resin secretion which contributed mainly to the initial adhesion of the graft partners. Early callus formation occurred mainly from the rootstock with cells produced in definite rows, often in fan-like array. Parenchyma cells in the cortex, pith, xylem and phloem rays were all involved in callus formation. The establishment of the cambial bridge between the stock and scion was followed by the formation of a protective layer, the periderm across the callus edges.