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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (5): 49-61.doi: 10.11707/j.1001-7488.20140507

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Pollen Morphology of 20 Species in Picea by Scanning Electron Microscope

Jia Zirui1, Wang Junhui1, Zhang Shougong1, Ma Jianwei2, Yang Guijuan1   

  1. 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, Chinese Academy of Forestry Beijing 100091;
    2. Research Institute of Forestry of Xiaolongshan, Gansu Province Tianshui 741020
  • Received:2013-05-10 Revised:2013-07-08 Online:2014-05-25 Published:2014-06-06
  • Contact: 张守攻

Abstract:

Pollen grains from 20 species of the genus Picea were examined using the scanning electron microscope, including P. retroflexa, P. koraiensis, P. asperata, P. meyeri, P. crassifolia, P. wilsonii, P. likiangensis, P.likiangensis var. balfouriana, P. purpurea, P. jezoensis var. microsperma, P. neoveitchii, P. schrenkiana var. tianschanica, P. schrenkiana, P. smithiana and P. likiangensis var. linzhiensis in China; P. polita in Japan, P. abies and P. omorika in Europe; and P. glauca and P. mariana in North America. The characteristics of pollen morphology among the species were distinguished using data statistics and photographic analysis. Mean pollen size in the 20 species was from 84.33 to 118.79 μm. According to morphological photography, corpus surface texture of pollens had two types, with or without grains distributing; and two bladders distributed at zygomorphic underside of corpus was found to being distinct edge of cap at near surface in corpus. Its surface texture was smoother and there was no distinct variation among species. Germinal furrow formed clear striate between two bladders. Results showed that the pollen morphology had variability among species, and had conservative within species, which would be a more intuitive and effective palynological index for phylogeny study in Picea.

Key words: Picea, pollen morphology, taxonomy, electron microscope scanning

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