Preliminary Studies on Polyploidy Mutation of Cut Flower Gerbera jamesonii Bolus Preliminary Studies on Polyploidy Mutation of Cut Flower Gerbera jamesonii Bolus Anatomical Structure observation of Stem Blockage in Cut Gerbera Flowers The Induction and Proliferation of Calli in Gerbera jamesonii Bolus Rapid detection of 3 viruses in Gerbera jamesonii Bolus and its virus-free by tissue culture Influence of S-3307 on Fresh-keeping of Cut Flowers of Gerbera jamesonii Bolus Selection of Organic Ecotype Soilless Culture Media for Gerbera jamesonii Selection of Organic Ecotype Soilless Culture Media for Gerbera jamesonii