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利用盆栽试验探讨了四川20个水稻育种材料(其中保持系和恢复系各10个品系)对外源污染物铅(Pb)、镉(Cd)的吸收能力及这两种重金属在稻草和稻米中的分配差异。结果表明,Pb或Cd胁迫下,水稻不同基因型对其吸收存在明显差异。在供试验材料中,最不易受Pb污染材料为Y11,稻米未检出Pb,其稻草中的Pb最不易向子粒转移;最不易受Cd污染的材料为Y16,稻米含Cd0.15mg·kg-1,含量低于无公害大米标准(NY5115-2002)。最易受Pb污染的材料分别为Y07和Y17,而最易受Cd污染的材料分别为Y07、Y05和Y17。稻米对Cd的富集能力大大高于对Pb的富集能力。恢复系抗Pb或Cd污染的能力优于保持系。
Pot experiments were conducted to investigate the absorption of Pb and Cd from 20 rice breeding materials (including 10 maintainer and restorer lines) in Sichuan and their absorption in rice straw and rice Discrepancy The results showed that under the Pb or Cd stress, different genotypes of rice had significant differences in their absorption. Among the tested materials, Pb is the least susceptible to Pb contamination, Y11 is not detected in rice, and Pb in straw is the least susceptible to transfer to grains; the least susceptible to Cd pollution is Y16, the content of Cd is 0.15 mg · kg- 1, the content is lower than the pollution-free rice standard (NY5115-2002). The materials most susceptible to Pb contamination were Y07 and Y17, respectively, while the materials most susceptible to Cd contamination were Y07, Y05 and Y17, respectively. The ability of rice to enrich Cd is much higher than that of Pb. The ability to restore lines against Pb or Cd contamination is superior to that of the maintainer line.