中子辐照及其与赤霉素复合处理水稻种子对水稻苗期生长的影响

以快中子脉冲堆对水稻种子进行中子辐照后用赤霉素(GA3)处理,对处理的种子发芽和幼苗生长情况进行研究。结果表明,红矮B和CB的致死注量为486×1010/cm2,绵恢2009为900×1010/cm2,明恢63和绵恢2095则为1350×1010/cm2;半致死注量:红矮B和CB为198~486×1010/cm2之间,绵恢2009约为486×1010/cm2,明恢63为629.48×1010/cm2,绵恢2095为774.69×1010/cm2。辐射敏感性表现为保持系>恢复系,即红矮B、CB>绵恢2009>明恢63>绵恢2095。赤霉素为有效的中子辐射防护剂,40和80mg/L是水稻中子辐照复合处理适宜的浓度。

EFFECT OF COMBINED TREATMENTS OF NEUTRON RADIATION AND PLANT GROWTH REGULATOR(GA) ON SEED GERMINATION AND GROWTH OF RICE

Rice seeds were irradiated with fast-neutron impulse pile and then were treated with different concentration of GA_3.The effect of combined treatments on seeds germination and seedling growth were studied.The results showed that lethal pouring dose of neutron radiation on Hongai B and CB was 486×10~(10)/cm~2,Mianhui 2009 was 900×10~(10)/cm~2 and Mianhui 2095 and Minghui 63 were 1350×10~(10)/cm~2.Semi-lethal pouring dose(LD_(50)) of neutron radiation on Hongai Band CB was 198～486×10~(10)/cm~2,Mianhui 2009 was about 486×10~(10)/cm~2,Minghui 63 was 629.48×10~(10)/cm~2 and Mianhui 2095 is 774.69×10~(10)/cm~2.Radiation sensitivity of rice is Hongai B,CB>Mianhui 2009>Minghui 63>Mianhui 2095.GA_3 is an kind of efficient chemical radiation protection.40 and 80mg/L are the proper GA_3 concentrations of neutron irradiated rice seeds.