KARYOTYPE ANALYSIS OF CASSSIA TORA L. A TRADITIONAL CHINESE MEDICINE / 西安交通大学学报(医学版)

ABSTRACT

The karyotype of cassia tora L., a commonly used Chinese medicine capable of improving cyesight, was analyzed in this paper. The results show that the number of the chromosomes of Cassia tora L. is 2n=26. Of pairs homologous chromosomes, the fifth, sixth, eighth, tenth and eleveth pairs are submedian kinetochoral, while others have median kinetorchores. The long arms of the fifth pair have secondary constriction The absolute length of the chromosomes ranges from 2.14 to 3.48 microns. The relative length is from 5.9% to 9.5%. The karyotype of Cassia tora L. can be expressed in the following formula k (2n) = 26= 16 m+8sm+2sm (sc). These results provide more critical criteria for identiding Cassia tora L. on the chromosomal level.