Plant regeneration from sour orange and lime undeveloped ovule cultures. Selection for salinity tolerance in sour orange in vitro. Plant regeneration from embryogenesis callus of v. vinifera cv. Thompson seedless. Genetic manipulation through somatic hybridization between v. vinefra cv. Thompson seedless and v. rotandifolia cv.Carlos grape protopalsts. Plant regeneration from root apices of some citrus root stocks. Effect of endomycorryzhial fungi, root-Knot nematode and phosphorus fertilization on growth of Meat-Ghamer peach Seedlings Studies on growth of pecan seedlings: i- Effect of bio and chemical phosphorus fertilixation. ii- The residual effect of endomycorryzhial fungi and phosphrous fertilization levels. Studies on seed germination of some citrus rootstocks. Clonal propagation of somr citrus rootstocks bu stem hardwood cuttings. In vitro propagation of Hansen- 536 peach and Mac-9 apple rootstocks. Annals of Agri. Sci., Moshtohor.vol.46 (2) Protoplast isolation and culture of pyrus betulaefolia and pyrus communis pear rootstocks. Annals of Agri. Sci., Moshtohor.vol.46 (2) Physiological studies on salt tolerance of two banana cultivars. i- Effect of salt concenteration, sodium adsorbtion ratio (S.AR) and chloride level in irrigation water on growth and chemical constituents. Annals of Agri. Sci., Moshtohor.vol.45 (4)