Phylogenetics and Biogeography of the Genus &lt;I&gt;Metastelma&lt;/I&gt; (Apocynaceae-Asclepiadoideae-Asclepiadeae: Metastelmatinae)

Liede‐Schumann, Sigrid; Nikolaus, Marc; Silva, Uiara Catharina Soares e; Rapini, Alessandro; Mangelsdorff, Ralph D.; Meve, Ulrich

doi:10.1600/036364414x680708

Cited by 25 publications

(12 citation statements)

References 46 publications

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“…The recovered relationships among tribes of Asclepiadoideae are consistent with previous studies (Liede, ; Liede and Täuber, ; Rapini et al., , ; Liede‐Schumann et al., , ; Straub et al., ; Surveswaran et al, ). The placement of Eustegieae as sister to Asclepiadeae supports the results of Straub et al.…”

Section: Discussionsupporting

confidence: 90%

Evolution on the backbone: Apocynaceae phylogenomics and new perspectives on growth forms, flowers, and fruits

Fishbein

Livshultz

Straub

et al. 2018

American J of Botany

123

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Section: Discussionsupporting

confidence: 90%

Evolution on the backbone: Apocynaceae phylogenomics and new perspectives on growth forms, flowers, and fruits

Fishbein

Livshultz

Straub

et al. 2018

American J of Botany

123

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“…Advances International Journal of Biodiversity in Apocynaceae systematics is incorporated into an updated classification at the tribal and subtribal levels [44], but many genera are not monophyletic (e.g., [62,63]) or still need a thorough phylogenetic investigation [47]. So far, dated phylogenies in Apocynaceae focused only on less inclusive groups, such as Asclepiadoideae [64], Tylophorinae [65], and Minaria [66], and used trnL intron and trnL-F intergenic space (trnL-F) for the Apocynaceae big picture.…”

Section: Discussionmentioning

confidence: 99%

Tropical Refuges with Exceptionally High Phylogenetic Diversity Reveal Contrasting Phylogenetic Structures

Pugliesi

Rapini

2015

International Journal of Biodiversity

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Loss of phylogenetic diversity (PD) has gained increasing attention in conservation biology. However, PD is not equally distributed in a phylogeny and can be better assessed when species relatedness (phylogenetic structure: PS) is also considered. Here, we investigate PD and PS in two refuges of biodiversity in northeastern Brazil: the Bahia Costal Forest (BCF) in the Atlantic Forest domain and Chapada Diamantina (CD) in the Caatinga domain. We used geographic data of 205 species at two spatial scales and a chronogram of Apocynaceae based on matK sequences to estimate PD and PS. Our results show an exceptionally high PD in both refuges, overdispersed in BCF and clustered in CD, although this difference is less evident or absent for recent relationships, especially at a smaller spatial scale. Overall, PS suggests long-term competitive exclusion under climatic stability, currently balanced by habitat filtering, in BCF, and biome conservatism and limited dispersal leading to in situ diversification and high density of microendemics in CD. The phylogenetically clustered flora in CD, also threatened by climate changes, are naturally more vulnerable than BCF. Therefore, while in situ conservation may ensure protection of biodiversity in BCF, emergency ex situ conservation is strongly recommended in CD.

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“…We identified compounds that might be PAs with low confidence in five Table 2). The re-circumscription of genera in these species-rich Asclepiadeae subtribes is ongoing (Liede-Schumann et al, 2014;Liede-Schumann et al, 2005;Silva et al, 2012) and a chemotaxonomic approach has not been attempted. The compounds discovered in the present study, once they are identified, can form a nucleus for this research.…”

Section: Asclepiadeae and Periplocoideaementioning

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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Phylogenetics and Biogeography of the Genus <I>Metastelma</I> (Apocynaceae-Asclepiadoideae-Asclepiadeae: Metastelmatinae)

Cited by 25 publications

References 46 publications

Evolution on the backbone: Apocynaceae phylogenomics and new perspectives on growth forms, flowers, and fruits

Evolution on the backbone: Apocynaceae phylogenomics and new perspectives on growth forms, flowers, and fruits

Tropical Refuges with Exceptionally High Phylogenetic Diversity Reveal Contrasting Phylogenetic Structures

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

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