Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Pomology

A greenhouse experiment was conducted during two successive growing seasons of 2013 and 2014, to study the effect of amino acids treatments on vegetative growth and mineral content of 6 month old of C - 35 citrange (poncirus trifoliate x C. sinensis ); troyer citrange (C. sinensis X poncirustrifoliata (L) raf.) and X- 639 hybrid (cleopatra mandarin X poncirus trifoliata) seedling under different levels of salinity. Seedlings irrigated (twice / week for 24 weeks) with different levels of salinity solution (0, 1000, 1500 and 2000 ppm), moisture content of the planting medium was raised up to the field capacity. Amino acids treatments were applied at 0.00, 1.5 and 3.00 ml/l. every 15 days as soil application. The obtined resultes indicated that, low levels of salinity (1000 and 1500 ppm) plus both 1.50 and 3.0 ml / l. of amino-acid significantly improved tested rootstocks seedlings stem height, number of shoots/ seedling, stem diameter, number of leaves, leaf area, root length and width and harmful symptoms of salinity stress. Morever, amino acid rate 3.00ml / l. under the high salinity levels (1500 and 2000 ppm) significantly increased root length. High salinity levels and amino-acid application rates statistically increased the prolin contents in rootstocks roots

Issued also as CD