Asymbiotic seed germination and high-frequency seedling regeneration of Spiranthes sinensis, an endangered orchid Factors Affecting High-frequency Induction of Hair-like Roots of Reynoutria Japonica Houtt. Analysis of Nuclear Genome Codon Preference in Cabbage Callus Induction and Plant Regeneration of Rosa hybrida Study on High-Frequeney Plant Regeneration from Monocell Suspension ,Cultures of Astragalus grubovii Variation of Temperature inside the Mats for Wood-Based Panels by High-Frequency Hot Pressing Process The callus induction and high-frequency regeneration of Dioscorea opposita Thunb Analysis of Nuclear Genome Codon Preference in Cabbage THE OPTIMIZATION FOR HIGH-FREQUENCY PROLIFERATION OF ADVENTITIOUS BUDS OF Emmenopterys henryi Oliv. Establishment of High-frequency Regeneration System from Leaves and Stems of Pueraria lobata Characteristic of phytoplankton primary productivity and influencing factors in littoral zone of Lake Taihu