Roxburgh was right: Aponogeton microphyllus and Aponogeton undulatus are distinct species
- Title
- Roxburgh was right: Aponogeton microphyllus and Aponogeton undulatus are distinct species
- Creator
- Chougule R.N.; Surveswaran S.; George A.; Yadav S.R.; Lekhak M.M.
- Description
- Aponogeton microphyllus, previously placed under the synonymy of A. undulatus, is recognized here as a distinct species based on morphology, chromosome number, and molecular phylogenetics (nuclear ribosomal internal transcribed (ITS) spacer region). Observations on the type and live specimens revealed morphological differences between the two species. Aponogeton microphyllus flowered regularly and set seeds. Aponogeton undulatus flowered rarely, did not set seeds, but showed formation of young plantlets on the inflorescence axis. Similarly, different chromosome numbers were recorded in Aponogeton microphyllus and the two forms of A. undulatus, viz., AF1 and AF2, whichoccurin distinct populations. Aponogeton microphyllus exhibited polysomaty with root-tip cells showing 2n=40, 42, and 44 chromosomes. The two forms of A. undulatus, AF1 and AF2, showed 2n=84 and 86 chromosomes, respectively. Based on the ITS data, both speciesoccupiedtwo separate clades. Plastid trnK intron region indicated a close relationship between both species. Our study suggests the need for comprehensive phylogenetic analyses of A. undulatus across its distribution range based on more advanced techniques such as high-throughput sequencing data to understand the A. undulatus species complex and to detect natural hybrids of this species. 2023, Indian Academy of Sciences.
- Source
- Journal of Biosciences, Vol-48, No. 4
- Date
- 2023-01-01
- Publisher
- Springer
- Subject
- Aquarium plant; cpDNA; cytogenetics; hybridization; ITS; phylogeny; polysomaty
- Coverage
- Chougule R.N., Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur, 416004, India; Surveswaran S., Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, India; George A., Department of Life Sciences, CHRIST (Deemed to be University), Bengaluru, 560029, India; Yadav S.R., Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur, 416004, India; Lekhak M.M., Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur, 416004, India
- Rights
- Restricted Access
- Relation
- ISSN: 2505991; PubMed ID: 38088375; CODEN: JOBSD
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Chougule R.N.; Surveswaran S.; George A.; Yadav S.R.; Lekhak M.M., “Roxburgh was right: Aponogeton microphyllus and Aponogeton undulatus are distinct species,” CHRIST (Deemed To Be University) Institutional Repository, accessed March 4, 2025, https://archives.christuniversity.in/items/show/13956.