EFFECT OF ION IMPLANTATION ON B. mucilaginosus KNP414 AND SCREENING FOR MUTANTS WITH HIGHER RELEASE OF PHOSPHATE AND POTASSIUM Isolation and Characterization of Regulators Involved in PHOT2-mediated Phototropism of Hypocotyls in Arabidopsis Screening for Root Nodulation-related Mutants of Lotus japonicus Induced by Space Flight A Convenient Method for Screening Genes Related to Fertilization and Embryogenesis in Arabidopsis