Rootstock influence on performance of different citrus scion cultivars: A review

Citrus is one of the most important fruit crop of Pakistan in terms of area and production. Pakistan ranks 7th according to area and 13th according to production. While comparing with leading citrus producing nations like Brazil, USA, China and Spain, citrus production of Pakistan is far behind and increasing at an average annual rate of only 5%. Brazil holds the 35% share in total citrus production of world while share of Pakistan is only 1.46%. Citrus cultivars are propagated asexually through grafting and budding on specific rootstocks. Rootstocks play very important role in Citriculture industry and decide success or failure of citrus cultivation. Under a specific and uniform set of climatic and soil conditions, citrus rootstocks tend to vary in their compatibility with a specific scion cultivar. The rootstocks have significant influence overall growth of tree including vegetative growth, mineral uptake, physiological performance of scion cultivar and reproductive growth of scion cultivars. The role of rootstocks in manipulating or improving the performance of citrus scion cultivars has been discussed in present review. Keywords: Citrus, rootstocks, physiology, vegetative, reproductive