Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants
We undertook a comparative study of the leaf venation characteristics of Dioscorea species from all seven sections distributed in China (33 species, 1 subspecies and 3 varieties). We established that leaf venation has a taxonomic significance in Dioscorea. The sections Combili, Opsophyton Lasiophyto...
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| Format: | Article |
| Language: | English |
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University of Belgrade, University of Novi Sad
2018-01-01
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| Series: | Archives of Biological Sciences |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-4664/2018/0354-46641700058S.pdf |
| _version_ | 1818187276913475584 |
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| author | Sun Xiao-Qin Xue Jia-Yu Lei Zhao Li Mi-Mi Zhang Yan-Mei Zhou Guang-Can Hang Yue-Yu |
| author_facet | Sun Xiao-Qin Xue Jia-Yu Lei Zhao Li Mi-Mi Zhang Yan-Mei Zhou Guang-Can Hang Yue-Yu |
| author_sort | Sun Xiao-Qin |
| collection | DOAJ |
| description | We undertook a comparative study of the leaf venation characteristics of Dioscorea species from all seven sections distributed in China (33 species, 1 subspecies and 3 varieties). We established that leaf venation has a taxonomic significance in Dioscorea. The sections Combili, Opsophyton Lasiophyton and Shannicorea all show consistent acrodromous venation (a subtype of palmate venation), with Botryosicyos exhibiting consistent pinnate venation. However, sections Stenophora and Enantiophyllum show obvious intrasectional differences. For example, D. simulans and D. biformifolia of section Stenophora have acrodromously veined middle leaflets, whereas the side leaflets are pinnately veined; D. cirrhosa and D. cirrhosa var. cylindrica of section Enantiophyllum show dichotomous veinlets. Other species in the same section show either one-branched veinlets or multiple branched veinlets. In addition to the discrepancy in venation patterns, differences in many other important morphological characteristics and chemical components were also observed. Therefore, D. simulans and D. biformifolia can be reasonably excluded from section Stenophora, and section Illigerestrum can be rebuilt using these two species. In addition, D. cirrhosa and D. cirrhosa var. cylindrica should be removed from section Enantiophyllum and placed into another new section. D. simulans and D. biformifolia show pinnate venation, and the complexity of their leaf organization (with both simple and compound leaves) also points to variations between the pinnate and acrodromous veins in Dioscorea. The repeated presence of palmate and pinnate venation in multiple angiosperm clades also suggests that the formation and evolution of venation are likely the result of evolutionary adaptation to ecological environments. |
| first_indexed | 2024-12-11T23:08:28Z |
| format | Article |
| id | doaj.art-eadb1a7f47f249c78770ef435ed5f6ae |
| institution | Directory Open Access Journal |
| issn | 0354-4664 1821-4339 |
| language | English |
| last_indexed | 2024-12-11T23:08:28Z |
| publishDate | 2018-01-01 |
| publisher | University of Belgrade, University of Novi Sad |
| record_format | Article |
| series | Archives of Biological Sciences |
| spelling | doaj.art-eadb1a7f47f249c78770ef435ed5f6ae2022-12-22T00:46:51ZengUniversity of Belgrade, University of Novi SadArchives of Biological Sciences0354-46641821-43392018-01-0170239740710.2298/ABS170322058S0354-46641700058STaxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plantsSun Xiao-Qin0Xue Jia-Yu1Lei Zhao2Li Mi-Mi3Zhang Yan-Mei4Zhou Guang-Can5Hang Yue-Yu6Jiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaJiangsu Province and Chinese Academy of Sciences, Institute of Botany, Nanjing, ChinaWe undertook a comparative study of the leaf venation characteristics of Dioscorea species from all seven sections distributed in China (33 species, 1 subspecies and 3 varieties). We established that leaf venation has a taxonomic significance in Dioscorea. The sections Combili, Opsophyton Lasiophyton and Shannicorea all show consistent acrodromous venation (a subtype of palmate venation), with Botryosicyos exhibiting consistent pinnate venation. However, sections Stenophora and Enantiophyllum show obvious intrasectional differences. For example, D. simulans and D. biformifolia of section Stenophora have acrodromously veined middle leaflets, whereas the side leaflets are pinnately veined; D. cirrhosa and D. cirrhosa var. cylindrica of section Enantiophyllum show dichotomous veinlets. Other species in the same section show either one-branched veinlets or multiple branched veinlets. In addition to the discrepancy in venation patterns, differences in many other important morphological characteristics and chemical components were also observed. Therefore, D. simulans and D. biformifolia can be reasonably excluded from section Stenophora, and section Illigerestrum can be rebuilt using these two species. In addition, D. cirrhosa and D. cirrhosa var. cylindrica should be removed from section Enantiophyllum and placed into another new section. D. simulans and D. biformifolia show pinnate venation, and the complexity of their leaf organization (with both simple and compound leaves) also points to variations between the pinnate and acrodromous veins in Dioscorea. The repeated presence of palmate and pinnate venation in multiple angiosperm clades also suggests that the formation and evolution of venation are likely the result of evolutionary adaptation to ecological environments.http://www.doiserbia.nb.rs/img/doi/0354-4664/2018/0354-46641700058S.pdfDioscorealeaf venationmicromorphologysectionadaptation |
| spellingShingle | Sun Xiao-Qin Xue Jia-Yu Lei Zhao Li Mi-Mi Zhang Yan-Mei Zhou Guang-Can Hang Yue-Yu Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants Archives of Biological Sciences Dioscorea leaf venation micromorphology section adaptation |
| title | Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants |
| title_full | Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants |
| title_fullStr | Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants |
| title_full_unstemmed | Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants |
| title_short | Taxonomic and phylogenetic significance of leaf venation characteristics in Dioscorea plants |
| title_sort | taxonomic and phylogenetic significance of leaf venation characteristics in dioscorea plants |
| topic | Dioscorea leaf venation micromorphology section adaptation |
| url | http://www.doiserbia.nb.rs/img/doi/0354-4664/2018/0354-46641700058S.pdf |
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