45S rDNA-FISH Mapping and Karyotype Analysis of Torenia fournieri L. Microsporogenesis and Male Gametophyte Development of Torenia fournieri Floral Organogenesis and Development of Torenia fournieri Floral Organogenesis and Development of Torenia fournieri Establishment of Agrobacterium -mediated Transformation System for Torenia Tissue culture and plant regeneration from Torenia biniflora Advances in Studies on Fertilization of Torenia fournieri (Scrophulariaceae) Effects of Arabinogalactan Proteins on Pollen Germination and Pollen Tube Growth of Torenia fourieri and Nicotiana tabacum L. Isolation and Collection of Two Groups of Sperm Cells from Torenia fournieri Effects of Calcium and Boron on Pollen Germination and Pollen Tube Growth of Torenia fournieri