Micromorphological characteristics of Gentianaceae seeds in Shergyla Mountain area of Tibet and their systematic and taxonomic significance

Li Hong-Chi; Luo Jian

doi:10.11913/PSJ.2095-0837.2019.60699

Plant Science Journal > 2019 > 37(6): 699-708. > DOI: 10.11913/PSJ.2095-0837.2019.60699 CSTR: 32231.14.PSJ.2095-0837.2019.60699

Li Hong-Chi, Luo Jian. Micromorphological characteristics of Gentianaceae seeds in Shergyla Mountain area of Tibet and their systematic and taxonomic significance[J]. Plant Science Journal, 2019, 37(6): 699-708. DOI: 10.11913/PSJ.2095-0837.2019.60699

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Micromorphological characteristics of Gentianaceae seeds in Shergyla Mountain area of Tibet and their systematic and taxonomic significance

Li Hong-Chi¹,
Luo Jian^2,3,4, ,

1. Food Science College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China;
2. Research Institute of Tibet Plateau Ecology, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China;
3. Tibet Key Laboratory of Forest Ecology in Plateau Area, Ministry of Education, Nyingchi, Tibet 860000, China;
4. National Key Station of Field Scientific Observation & Experiment, Nyingchi, Tibet 860000, China

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This work was supported by a grant from the National Natural Science Foundation of China (31260049).

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Received Date: May 23, 2019
Revised Date: June 16, 2019
Available Online: October 31, 2022
Published Date: December 27, 2019

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Abstract

Abstract

Scanning electron microscopy and stereoscope were used to observe the seed micromorphology of 20 species from six genera of the Gentianaceae family in the Shergyla Mountain area of Tibet. Results showed that the seeds of these 20 plants were black, yellow, dark brown, tan, taupe, and reddish brown and seed shape was divided into long ovoid, ovoid, elliptical, oblong, and nearly spherical. Skin ornamentation could be divided into mesh, striped, scorpion, and chew types, with the textured type further subdivided into six subtypes. According to the micromorphological characteristics of seeds, we investigated the evolutionary trends, taxonomic significance, and classification identification of genus Gentianaceae, and found that Swertia L. and Gentiana (Tourn.) L. showed a relatively high degree of evolution. Based on the micromorphological characteristics of the seeds, we identified a close relationship among Lomatogonium A. Br., Halenia Borkh., and Gentianella Moench. The characteristics of seed skin ornamentation of the genus Gentianaceae were relatively consistent with the classification system. This study shows that seed micromorphology is of significance in plant taxonomic studies and can be used as a reference trait for the study of plant system division, identification, and evolution.
- Gentianaceae,
- Seed micromorphology,
- Taxonomic significance,
- Shergyla Mountain area

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References (32)

References

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Micromorphological characteristics of Gentianaceae seeds in Shergyla Mountain area of Tibet and their systematic and taxonomic significance

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