EFFECTSOF Li+, NEOMYCIN AND Ca2+ ON POLLEN GERMINATION AND POLLEN TUBE GROWTH OF APPLE Optimization of Fermentation Conditions for Neomycin-producing Strain Streptomyces fradiae FIM-S38 Streptomycin-resistant Rational Screening for High-yield Neomycin Producing Strain A genetic transformation of roselle callus mediated by Agrobacterium tumefaciens Development and Apply of Semi-quantitative Quick ELISA Analysis for Neomycin