摘要
采用培养皿光照培养箱培养方法,研究了不同浓度铀矿浸出液胁迫对绿豆种子的萌发、幼苗及其根系的早期生长以及体内超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性的影响。结果表明,铀矿浸出液的浓度≤10%时,胁迫对绿豆种子的萌发率没有影响,但加快了种子的萌发势,显著激发了绿豆幼苗及其根系的生长(P<0.05);浓度<10%时,铀矿浸出液胁迫显著增加了绿豆幼苗及其根系SOD的活性(P<0.05),但它们的CAT活性接近对照;浓度=10%时,铀矿浸出液胁迫显著增加了幼苗及其根系CAT的活性(P<0.05);浓度=100%时,铀矿浸出液胁迫显著抑制了种子的萌发势(P<0.05),最终的萌发率只能达到60%,幼苗及其根系不能正常生长,它们的SOD和CAT活性远远低于对照。
Mung bean is one of the key edible beans in China. It is very important to prevent it from being polluted by radioactive nuclides. In this paper, the uranium pregnant solution from leaching of uranium ore was used to study the effects of the stress from the solution on the seed germination, the early growth of the seedling and its root and their superoxide dismutase and catalase activities. The research results showed that, when the proportion of the uranium pregnant solution in its dilution was less than or equal to 10%, the dilution would promote the seed＇s germination potential but would not affect its germination rate, and would stimulate the growth of the seedling and its root significantly. When the proportion was less than 10%, the dilution would activate the superoxide dismutase of the seedling and its root obviously, but would have little effect on their catalase activity. When the proportion was 10%, the dilution would activate the catalase activity of seedling and its root; And that, when the proportion was 100%, the seed＇s germination potential would be inhibited significantly, the final germination rate could only reach 60%, seedling and its root could not grow as normal and their superoxide dismutase and catalase activities would be much lower than those of seedling and root cultivated in distilled water.for comparison.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2009年第4期789-795,共7页
Journal of Agro-Environment Science
