Acta Phytotaxonomica Sinica

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Karyotypes of eight species of the genus Aspidistra from China

WANG Ren-Xiang, LI Guang-Zhao, LANG Kai-Yong, WEI Yi-Gang   

  • Received:1900-01-01 Revised:1900-01-01 Online:2001-01-10 Published:2001-01-10
  • Contact: WANG Ren-Xiang

Abstract: This paper reports the chromosome number and morphology of 8 species of the genus As- pidistra from China. The chromosome number of six species is reported for the first time. The results are as follows: 2n = 2x = 36 = 18m + 2sm(2sat) + 16st for A. ebianensis; 2n = 2x = 36 = 14m + 6sm(2sat) + 16st for A. yingjiangensis; 2n = 2x = 36 = 20m(2sat) + 14st + 2t for A. hainanensis; 2n=2x=36= 16m + 4sm(2sat) + 16st for A. saxicola; 2n = 2x = 36 = 18m+ 2sm(2sat) + 16st for A. muricata; 2n = 2x = 38 = 22m+4sm(2sat) + 12st for A. marginella; 2n = 4x = 76 = 48m (4sat) +2sm+26st for A. xilinensis; 2n = 4x = 76 = 46m(4sat) + 12sm+ 18st for A. crucifor- mis. All the karyotypes are bimodal and belong to Stebbins’2C type. A. cruciformis and A. xilin- ensis are the only two tetraploid species found in Aspidistra up to date. Based on our results and those previously reported,we consider that the karyotypes of the genus Aspidistra might have evolved towards the increase of symmetry by the increase of median-centromeric chromosomes in the chromo- some complement and the basic chromosome number x = 18 might be primitive, while x = 19 derived. Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug.
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