The DNA degradation was studied in the experiment of transfering exogenousDNA into the rice embryo by embryo-soaking method with rice embryo as the receptor andfish sperm DNA as the donor.The analysis of the timing samples by agarose electrophoresisand ultraviolet absorption spectrum scanning showed the rice embryo was able to degrade theexogenous DNA.The large DNA melecule was degraded into small ones,dNMPs,bases and/or inorganic elements after 48h’s soaking and the ultraviolet absorption increased apparentlyin 220~224 nm. Considering the ad...