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The plant pollen which is conservative and stable on genetic has great significance for the study on plant classification, origin and evolution. Optical microscopy and scanning electron microscope (SEM) were used to compare the pollen grains of nine Potentilla species in Daqing area. The pollen grain shows much similarity through optical microscopy and 4 000× scanning electron microscope. Under 8 000× scanning electron microscope, it showed three types of surface strip decoration of non-double-edge ridge ornamentation, multi-groove ridge strip motif and non-groove strip,the width of ridge ranges from 0.11 to 0.29 μm and the width between ridges is from 0.37 to 0.78 μm,continuously or discontinuously ridges. There were holes or microparticle on the surface and the colporate shapes were linear and fractured. The evolution trend concluded of the nine Potentilla species pollen was consistent with the traditional classification trend.
The plant pollen which is conservative and stable on genetic has great significance for the study on plant classification, origin and evolution. Optical microscopy and scanning electron microscope (SEM) were used to compare the pollen grains of nine Potentilla species in Daqing area. The pollen under 8 000 × scanning electron microscope, it showed three types of surface strip decoration of non-double-edge ridge ornamentation, multi-groove ridge strip motif and non-groove strip, the width of ridge ranges from 0.11 to 0.29 μm and the width between ridges is from 0.37 to 0.78 μm, continuously or discontinuously ridges. There were holes or microparticle on the surface and the colterprises shapes were linear and fractured. of the nine Potentilla species pollen was consistent with the traditional classification trend.