MUTAGENIC EFFECTS AND MECHANISM OF SYNCHRONOUS RADIATION(SOFT X\|RAY) ON WINTER WHEAT Ⅱ THE OBSERVATION ON ULTRASTRUCTURE OF SEEDLING LEAF CELLS STUDIES ON MUTAGENIC EFFECTS OF SYNCHROTRONOUS RADIATION(SOFT X-RAY) ON WINTER WHEAT Ⅰ. RADIATION BIOLOGICAL EFFECTS MUTAGENIC EFFECTS OF SYNCHROTRON SOFT X-RAY WITH RESONANCE ENERGY OF Nk IRRADIATION ON Rhizopus oryzae