唇形科独一味属和五种糙苏属植物的核形态研究

A karyomorphological study in the monotypic genus Lamiophlomis and five species in Phlomis (Lamiaceae)

首次报道了唇形科Lamiaceae独一味属Lamiophlomis和五种糙苏属Phlomis植物的染色体数目和核型。它们的间期核均属球状前染色体型,有丝分裂前期染色体均为中间型。中期染色体核型公式如下:独一味L.rotata,2n=2x=22=18m+4sm;糙苏P.umbrosa,2n=2x=22=22m;裂萼糙苏P.ruptilis,2n=2x=22=22m;假秦艽P.betonicoides,2n=2x=22=22m;黑花糙苏P.melanantha,2n=2x=22=22m(2sat);糙毛糙苏P.strigosa,2n=6x=66=60m+6sm;染色体基数均为x=11。这表明独一味与糙苏属的糙苏组sect.Phlomoides植物具有相同的染色体基数,反映出两者较为密切的系统演化关系,推断独一味很可能是糙苏属的一个种。

The monotypic genus Lamiophlomis （including only L. rotata） and five species of Phlomis in the Lamiaceae were karyomorphologically studied. The interphase nuclei are all categorized to be round prochromosome type, and the mitotic-prophase chromosomes are all categorized to be interstitial type. The karyotype formulae are as follows： L. rotata, 2n=2x=22=18m＋4sm; P. umbrosa, 2n=2x=22=22m; P ruptilis, 2n=2x=22=22m; P betonicoides, 2n=2x=22=22m; P melanantha, 2n=2x=22=22m（2sat）; P strigosa, 2n=6x=66= 60m＋ 6sm. The basic chromosome number of Lamiophlomis is confirmed to be x=11, the same as that of Phlomis sect. Phlomoides, which shows that Lamiophlomis rotata should be better treated as a species of Phlomis.