Biosynthesis of arbutin from crown gall of transgenic Panax quinquefolium Autotoxicity and promoting: dual effects of root litter on American ginseng growth Isolation of endophytes from Panax quinquefolium and screening and identification of strains with antagonistic activity Cloning and sequence analysis of PqGA2ox gene in Panax quinquefolium Cloning and sequence analysis of PqGA20ox gene in Panax quinquefolium Allelopathy of water extract from Panax quinquefolium, Perilla frutescens,and Coix Lacryma-jobi Allelopathic effect of p-coumaric acid on American ginseng and its physiological mechanism Genetic Transformation of Soybeans by Soaking Its Seeds with the Total DNA of America Ginseng (Panax quinquefolium) Ⅰ. Analysis on the Variation of Soybean Morphologic Characters Induced by Foreign DNA Uptake Isolation and purification of polysaccharides from transgenic crown gall cultures of Panax quinquefolium