Effect of Rootstock Type and CO2 Enrichment on Bud Take of Local Sweet Orange and Growth Characteristics of the Produced Seedlings

Abstract

This experiment was conducted to study the influence of rootstock type and CO2 enrichment in the percentage of the local sweet orange scions success and growth characteristics of the produced seedlings under lath house conditions from March 2011 to November 2012 , Five types of citrus rootstocks : sour orange , cleopatra mandarin , swingle citrumelo , volkamer lemon and rough lemon were selected to budding with local sweet orange in 10/4/2011 and exposing the budded transplants to two CO2 levels : concentration of CO2 in the atmospheric air ( control ) 0.0385% and 0.077%. The results demonstrated that the rootstock type had significant effect in the studied traits , cleopatra mandarin rootstock had achieved the highest percentage of scions success and highest N , chlorophyll content in the leaves , volkamer lemon rootstock had achieved the highest value of the branches length , rough lemon rootstock had achieved the highest value of the branches number , leaves number , scion diameter , the dry weight of vegetative part and the percentage of carbohydrate in the branches while the rootstocks volkamer lemon and rough lemon had achieved the highest value of the leaves area , exposed the budded transplants to 0.077% CO2 significantly increased the percentage of successful scions , number of branches , length of branches , number of leaves , leaves area , scion diameter , the dry weight of vegetative part and branches content of carbohydrate , and significant decreased in leaves N and chlorophyll content .