Study on Cytological Effects of Rice Implanted with Ion Beam

The seeds of diploid and tetraploid rice were implanted by nitrogen ion beam.The cytological effects of the root tip cells were studied.The results showed that ion beam implantation could inhibit the survival rate and lots of types of chromosome aberration were observed in the mitosis of root tip cells of M0 generation,such as chromosome bridge,chromosome fragment,univalent and polyvalent.Chromosome aberration rate was not proportional to N+ ion treatment dosages.But as a whole,the more of the dose,the higher of the chromosome aberration rate.The results proved that ion beam could cause abnormity of chromosomes,which might be the cytological reason that leading to the heritable mutations.