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- Title
5种橐吾属植物种子特征及其分类.
- Authors
董 然; 李盼盼; 钱 英; 王悦宏; 周蕴薇
- Abstract
[Objective] The seed characteristics of five Ligularia species in the Changbai Mountain were compared to provide basis for taxonomic research, cultivation and breeding of Ligularia. [Method] The appearance characteristics, microstructure and anatomical characteristics of seeds of five Ligularia species(L. fischeri, L. fischeri (‘Zijin’), L. villosum, L. schmidtii and L. dentata ‘Desdemona’) were compared by morphological observation, electron microscope scanning and traditional paraffin section method. Finally, cluster analysis was used for classification. [Result] The appearance characteristics of tested seeds, such as color, shape, size and thousand seed weight, were significantly different. Seeds of all species had dark stripes, except that of L. schmidtii had uniform color. Through the scanning electron microscope, the lateral, umbilicus and beak of seeds were longitudinal stripe and negative reticulate patterns, and the decorative characteristics were different among species. The cross section of tested seeds was oval, nearly round or polygonal, and exocarp, mesocarp, seed coat, endosperm and cotyledon were in order from outside to inside. There were differences in the characteristics of each part among different species. The five Ligularia species were clustered into 3 categories by cluster analysis. L. fischeri and L. fischeri (‘Zijin’) were not grouped together as there were significant differences in all morphological and anatomical structure indexes (P<0. 05). [Conclusion] The seed volume and anatomical indexes of L. schmidtii were the largest, which was one of the reasons limiting its seed germination. The L. fischeri (‘Zijin’) may be a new variant. The morphological and anatomical characteristics of seeds of the five Ligularia species had significant differences and can be used as an important basis for classification, identification and exploration of the evolutionary relationship of Ligularia.
- Subjects
SCANNING electron microscopes; SEED size; CLUSTER analysis (Statistics); GERMINATION; NAVEL; PARAFFIN wax; ENGLISH ivy
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2023, Vol 51, Issue 10, p118
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2023.10.013