Construction and transformation of antisense RNA expression vector of Arabidopsis phytochrome A gene Cloning of ACC Oxidase Gene from Cattleya Flower and Construction of Its Plant Antisense Expression Vector CLONING OF ACC OXIDASE GENE OF CARNATION AND CONSTRUCTION OF ITS PLANT ANTISENSE EXPRESSION VECTORS The Construction of Antisense Expression Vector of Pectin Methylesterase Gene and its Transfer to Yali Pear (Pyrus bretschneideri Rehd.) Cloning of ACC Oxidase Gene from Yali Pear and Tranformation of Its Antisense Expression Vector with Agrobacteriummediated Method Cloning of cDNA for ACC Oxidase from Fruit of Pyrus pyrifolia Nakai and Construction of Its Corresponding Antisense Expression Vector Cloning of cDNA for ACC Oxidase from Fruit of Pyrus pyrifolia Nakai and Construction of Its Corresponding Antisense Expression Vector