Phylogenetic studies in the Hoya group (Apocynaceae, Marsdenieae): the position of Anatropanthus and Oreosparte

Rodda, Michele; Simonsson, Nadhanielle; Ercole, Enrico; Khew, Gillian; Niissalo, Matti A.; Rahayu, Sri; Livshultz, Tatyana

doi:10.3372/wi.50.50112

Cited by 14 publications

(25 citation statements)

References 41 publications

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“…To facilitate comparison, for the Hoya clades we refer to the clade names of Wanntorp et al 10 (their Figs. 3 and 4) and Rodda et al 7 (their Fig. 4) whenever possible.…”

Section: Resultsmentioning

confidence: 85%

“…Kloppenb. & Gilding and Hiepia V.T.Pham & Aver., have been subsumed under Hoya based on molecular data 7 – 10 and therefore at present the Hoya group includes only Dischidia , Heynella (for which no molecular data is available), Hoya , and the recently published Papuahoya Rodda & Simonsson (3 species) 7 .…”

Section: Introductionmentioning

confidence: 99%

“…The best sampled analysis of the morphological and taxonomic diversity of the Hoya group conducted to date is based on three chloroplast loci ( trnT-UGU – trnL-UAA – trnF-GAA , psbA–trnH , matK ) and two nuclear loci (ITS and ETS) 7 . The Hoya group clade, including Hoya s .…”

Section: Introductionmentioning

confidence: 99%

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Plastome evolution and organisation in the Hoya group (Apocynaceae)

Rodda

Niissalo

2021

Sci Rep

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The genus Hoya is highly diverse and many of its species are popular ornamental plants. However, the relationships between Hoya and related genera (the Hoya group) are not fully resolved. In this study, we report 20 newly sequenced plastomes of species in the Hoya group. The complete plastomes vary in length from 175,405 to 178,525 bp while the LSCs vary from 90,248 to 92,364 bp and the complete SSCs vary from 2,285 to 2,304 bp, making the SSC in the Hoya group one of the shortest known in the angiosperms. The plastome structure in the Hoya group is characterised by a massive increase in the size of the inverted repeats as compared to the outgroups. In all ingroup species, the IR/SSC boundary moved from ycf1 to ndhF while this was not observed in outgroup taxa, making it a synapomorphy for the Hoya group. We have also assembled the mitogenome of Hoya lithophytica, which, at 718,734 bp, is the longest reported in the family. The phylogenetic analysis using exons from 42 taxa in the Hoya group and three outgoups confirms that the earliest divergent genus in the Hoya group is Papuahoya, followed by Dischidia. The relationship between Dischidia and the clade which includes all Hoya and Oreosparte taxa, is not fully supported. Oreosparte is nested in Hoya making it paraphyletic unless Clemensiella is recognised as a separate genus.

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“…To facilitate comparison, for the Hoya clades we refer to the clade names of Wanntorp et al 10 (their Figs. 3 and 4) and Rodda et al 7 (their Fig. 4) whenever possible.…”

Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Plastome evolution and organisation in the Hoya group (Apocynaceae)

Rodda

Niissalo

2021

Sci Rep

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“…The current taxonomic concept of Marsdenia R.Br. is highly polyphyletic (Rodda et al, 2020), and the segregation of monophyletic genera from Marsdenia sensu lato is ongoing (Espírito Santo et al, 2019).…”

Section: Marsdenieaementioning

confidence: 99%

“…Each analyzed tissue sample is vouchered by a specimen deposited in a publicly accessible herbarium (Table S1). Taxonomy follows Endress et al (2018) as updates by Espírito Santo et al (2019) and Rodda et al (2020).…”

Section: Plant Materialsmentioning

confidence: 99%

Chemotaxonomic Investigation of Apocynaceae for Retronecine-Type Pyrrolizidine Alkaloids Using HPLC-MS/MS

Barny

Tasca

Sánchez

et al. 2020

Preprint

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Apocynaceae are well-known for diverse specialized metabolites that are distributed in a phylogenetically informative manner. Pyrrolizidine alkaloids (PAs) have been reported sporadically in one lineage in the family, the APSA clade, but few species had been studied to date. We conduct the first systematic survey of Apocynaceae for retronecine-type PAs, sampling leaves from 231 species from 13 of 16 major lineages within the APSA clade using HPLC-MS/MS. We also follow up on preliminary evidence for infra-specific variation of PA detectability in Echites umbellatus Jacq. Four precursor ion scans (PREC) were developed for a high-throughput survey for chemicals containing a structural moiety common to many PAs, the retronecine core. We identified with high confidence PAs in 7 of 8 sampled genera of tribe Echiteae, but not in samples from the closely related Odontadenieae and Mesechiteae, confirming the utility of PAs as a taxonomic character in tribal delimitation. The presence of PAs in Malouetieae was confirmed, as we report with high confidence their presence in Galactophora schomburgkiana Woodson and Eucorymbia alba Stapf, but currently we have low confidence of their presence in Holarrena pubescens Wall. ex G. Don (the one Malouetieae species where they were previously reported), as well as in Kibatalia macrophylla (Pierre ex Hua) Woodson and in Holarrena curtisii King & Gamble. For the first time the presence of PAs in species of Wrightia R. Br. (Wrightieae) and Marsdenia R. Br. (Marsdenieae) was confirmed. Detectability of PAs was found to vary among samples of Echites umbellatus and intra-individual plasticity contributes to this variation. Of toxicological importance, novel potential sources of human exposure to pro-toxic PAs were identified in the medicinal plants, Wrightia tinctoria R.Br. and Marsdenia tinctoria R.Br., and the food plant, Echites panduratus A. DC., warranting immediate further research to elucidate the structures of the candidate PAs identified. Method development and limitations are discussed.

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Phylogeny of Marsdenieae (Apocynaceae, Asclepiadoideae) based on chloroplast and nuclear loci, with a conspectus of the genera

Liede‐Schumann

Reuss

Meve

et al. 2022

TAXON

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A densely sampled molecular phylogeny of the pantropical, predominantly forest‐dwelling tribe Marsdenieae (Apocynaceae) is presented, including almost a quarter of the ca. 740 species. Sampling focused on resolving the circumscription of Marsdenia, which ranges from Marsdenia sensu Bullock with less than 10 Asian species closely related to the type, M. tinctoria, to Marsdenia sensu Forster, with ca. 300 species distributed throughout the range of the tribe, encompassing the genera Cionura, Dregea, Gongronema, Gymnema, Leichhardtia, Stephanotis, and Wattakaka as synonyms. All analyses resolve two well‐supported clades: an Asia‐Pacific Clade that includes the large epiphytic Dischidia‐Hoya alliance and a number of Marsdenia species, among them the type M. tinctoria, and a Cosmopolitan Clade that includes most of the rest of Marsdenieae with several moderately to well‐supported subclades that span the entire geographic range of Marsdenieae. The position of two small genera, Rhyssolobium (southern Africa) and Sicyocarpus (Madagascar), is ambiguous. Given this topology, a monophyletic Marsdenia s.l. would subsume all species of Marsdenieae. Instead, we propose a classification that maintains Dischidia and Hoya as distinct genera. We revise generic circumscriptions, reducing Marsdenia s.str. to a small clade of Asian species. Two new genera, Gongreos gen. nov. and Gongronemopsis gen. nov., are described, with two and nine species, respectively. A total of twenty‐six new combinations, one new name, and six new synonyms are proposed. Three neotypes and eleven lectotypes are selected, and one 2nd step lectotypification is carried out. Diagnostic morphological characters for identified clades are discussed. Biogeographic analysis retrieves tropical Asia as most likely ancestral area for Marsdenieae, with widespread tropical Asia‐Africa almost equally likely. The first‐branching lineages in both major clades are tropical Asian; the Asia‐Pacific Clade comprises a sizeable radiation in the Pacific area, with two dispersals from Australia to New Caledonia. The Cosmopolitan Clade comprises several genera (Gongronemopsis, Gymnema, Stephanotis, Telosma) widespread in Africa and tropical Asia, and some also in Madagascar, and the New World genus Ruehssia.

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Phylogenetic studies in the Hoya group (Apocynaceae, Marsdenieae): the position of Anatropanthus and Oreosparte

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 14 publications

References 41 publications

Plastome evolution and organisation in the Hoya group (Apocynaceae)

Plastome evolution and organisation in the Hoya group (Apocynaceae)

Chemotaxonomic Investigation of Apocynaceae for Retronecine-Type Pyrrolizidine Alkaloids Using HPLC-MS/MS

Phylogeny of Marsdenieae (Apocynaceae, Asclepiadoideae) based on chloroplast and nuclear loci, with a conspectus of the genera

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