The diploid Lilium concolor Salisb.was treated by chochicine and the tetraploid plants were obtained.The stomata of tetraploid and diploid Lilium concolor Salisb were observed and compared.The results showed that the stomata length of three strains of tetraploid Lilium concolor Salisb were 51.25 μm、 56.50 μm and 54.26μm respectively,which was obviously longer than that of the control diploid with 37.42 μm.The stomata length of non-doubling Lilium concolor Salisb.treated by chochicine was 38.75 μm,near to th...