An Examination of the Chloroplast petD Intron among Eusporangiate Ferns.
The chloroplast petD gene consists of two exons separated by a group II intron with 6 stem-loop domains (DI–DVI). This study examines the petD intron of taxa representing the major eusporangiate lineages from downloaded GenBank sequences. For the eusporangiate ferns examined here, the intron length...
| Publicado en: | Journal of the Utah Academy of Sciences, Arts & Letters Vol. 102; pp. 65 - 89 |
|---|---|
| Autor principal: | |
| Formato: | Artículo |
| Publicado: |
Utah Academy of Sciences, Arts & Letters
2025
|
| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=193377427&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 193377427 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: B0JA jtl: Journal of the Utah Academy of Sciences, Arts & Letters maglogo: N pubinfo: dt: 2025 vid: 102 pid: 59066 pub: Utah Academy of Sciences, Arts & Letters artinfo: ui: 193377427 ppf: 65 ppct: 24 formats: fmt: @attributes: type: P size: 4.8MB tig: atl: An Examination of the Chloroplast petD Intron among Eusporangiate Ferns. aug: au: Speer, William D. affil: Salt Lake Community College. su: Phylogeny Introns Ferns Plant molecular genetics Genetic variation Chloroplasts Hairpin (Genetics) sug: subj: Phylogeny Introns Ferns Plant molecular genetics Genetic variation Chloroplasts Hairpin (Genetics) ab: The chloroplast petD gene consists of two exons separated by a group II intron with 6 stem-loop domains (DI–DVI). This study examines the petD intron of taxa representing the major eusporangiate lineages from downloaded GenBank sequences. For the eusporangiate ferns examined here, the intron length varied from 591 to 712 bp. As expected for the 6 group II introns, DI was the largest and accounted, on average, for approximately 52% of the overall intron length, although intron length variation among taxa was observed. Additionally, there did not appear to be a directly proportional relationship between DI and intron lengths. For example, the Equisetum species had the smallest introns (591–597 bp) with a DI (343–345 bp) representing approximately 58% of the overall length. In contrast, the taxa in the genus Ophioglossum all had introns of 712 bp, with their DI (347 bp) making up about 49% of the total length. Length variation between eusporangiate taxa was observed not only for the petD intron itself but also among the domains. Among the eusporangiate ferns, DI did not exhibit the greatest degree of variation (only 324 to 347 bp). Instead, this was observed for DIV (63 to 172 bp). The lowest level of observed length variation was for DV (34 to 35 bp). Also included for comparison were members of the Osmundaceae, a group of ferns considered intermediate between eusporangiate and leptosporangiate ferns and/or as basal leptosporangiate ferns. Intron and domain values for osmundaceous ferns were, in general, comparable with the eusporangiate ferns. Secondary structures were generated, and a phylogenetic analysis was also conducted. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
|---|