Propagation Studies in Sapodilla [Manilkara zapota (L.) P. Royen]: A Review

Sapota [Manilkara zapota (L) P. Royen] is an important commercial fruit crop of Sapotaceae family grown for fresh fruits and chicle production. Sapota when propagated by vegetative means, produce true to type plant material and reduces juvenile period and result in early commercial production. Various propagation techniques on different rootstocks were tried for the purpose. Among different rootstocks, khirni (Manilkara hexandra) was found most successful and is used for commercial plant propagation as it possesses high graft compatibility with sapota and plants produce fruits of excellent quality with high yield. Various vegetative propagation techniques have been standardized and used on large scale depending upon season and region. The general techniques used for sapota propagation are softwood grafting, veneer grafting, side grafting, inarching and air layering. Softwood grafting is employed in regions with moderate temperature and high relative humidity which prevent desiccation of scion stick. Veneer and side grafting using mature scion stick is also found effective in regions with variable climates. Inarching technique possess high graft survival rate and is practiced by private nurseries. Propagation through cuttings is not successful in sapota even when treated with rooting hormones. Micro-propagation in sapota by tissue culture techniques have been tried but application remains limited to academics only. This may be due to high phenolic contents and sap exudation in explant. Special protocols for successful root and shoot regeneration are required to be standardized for commercial scale plant propagation.