Systematic studies in Neotropical Rinorea (Violaceae): Two new sections and a new generic segregate

Wahlert, Gregory A.; Hoyos‐Gómez, Saúl E.; Ballard, Harvey E.

doi:10.1007/s12228-017-9507-z

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…was split into eight genera 16 ; Buchenavia Eichler was merged into Terminalia L. 17 ; Bribria Wahlert & H. E. Ballard was taken out of Rinorea Aubl. 18 ; and Anaectocalyx Triana , Calycogonium DC , Catocoryne Hook.f. , Charianthus D.Don , Clidemia D.Don , Conostegia D.Don , Killipia Gleason , Leandra Raddi , Maieta Aubl.…”

Section: Resultsmentioning

confidence: 99%

Towards a dynamic list of Amazonian tree species

Steege

Oliveira

Pitman

et al. 2019

Sci Rep

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To provide an empirical foundation for estimates of the Amazonian tree diversity, we recently published a checklist of 11,675 tree species recorded to date in the region (ter Steege H, et al . (2016) The discovery of the Amazonian tree flora with an updated checklist of all known tree taxa. Scientific Reports 6:29549). From this total of plant records compiled from public databases and literature, widely used in studies on the Amazonian plant diversity, only 6,727 tree species belong to the first taxonomically-vetted checklist published for the region (Cardoso D, et al . (2017) Amazon plant diversity revealed by a taxonomically verified species list. PNAS 114:10695-10700). The striking difference in these two numbers spurred us to evaluate both lists, in order to release an improved Amazonian tree list; to discuss species inclusion criteria; and to highlight the ecological importance of verifying the occurrence of “non-Amazonian” trees in the region through the localization and identification of specimens. A number of species in the 2016 checklist that are not trees, non-native, synonyms, or misspellings were removed and corresponded to about 23% of the names. Species not included in the taxonomically-vetted checklist but verified by taxonomists to occur in Amazonia as trees were retained. Further, the inclusion of recently recorded/new species (after 2016), and recent taxonomic changes added up to an updated checklist including 10,071 species recorded for the Amazon region and shows the dynamic nature of establishing an authoritative checklist of Amazonian tree species. Completing and improving this list is a long-term, high-value commitment that will require a collaborative approach involving ecologists, taxonomists, and practitioners.

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Section: Resultsmentioning

confidence: 99%

Towards a dynamic list of Amazonian tree species

Steege

Oliveira

Pitman

et al. 2019

Sci Rep

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“…14,15 Among these, the Violaceae stands out for containing these mini-proteins in all species studied. This taxon comprises 26 genera, 16 and as far as is known, only 10 (i.e., Viola, Gloeospermum, Leonia, Hybanthus, Melicytus, Rinorea, Pombalia, Orthion, Noisettia, and Allexis) have been reported to contain cyclotides. 17−20 A wide range of biological activities have been reported for cyclotides including uterotonic, 21,22 antimicrobial, 23−25 antifungal, 26 anti-HIV, 27,28 cytotoxic, 29−31 inhibition of cell migration, 19 and protease-inhibiting activities, 20,32 as well as being modulators of G protein-coupled receptors (GPCRs).…”

mentioning

confidence: 99%

“…This class of natural products has been identified only in six unrelated plant families, namely, the Violaceae, Rubiaceae, Cucurbitaceae, Solanaceae, Poaceae, and Fabaceae. , Among these, the Violaceae stands out for containing these mini-proteins in all species studied. This taxon comprises 26 genera, and as far as is known, only 10 (i.e., Viola , Gloeospermum , Leonia , Hybanthus , Melicytus , Rinorea , Pombalia , Orthion , Noisettia , and Allexis ) have been reported to contain cyclotides. − …”

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confidence: 99%

Cytotoxic Cyclotides from Anchietea pyrifolia, a South American Plant Species

et al. 2022

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Cyclotides are mini-proteins with potent bioactivities and outstanding potential for agricultural and pharmaceutical applications. More than 450 different plant cyclotides have been isolated from six angiosperm families. In Brazil, studies involving this class of natural products are still scarce, despite its rich floristic diversity. Herein were investigated the cyclotides from Anchietea pyrifolia roots, a South American medicinal plant from the family Violaceae. Fourteen putative cyclotides were annotated by LC-MS. Among these, three new bracelet cyclotides, anpy A–C, and the known cycloviolacins O4 (cyO4) and O17 (cyO17) were sequenced through a combination of chemical and enzymatic reactions followed by MALDI-MS/MS analysis. Their cytotoxic activity was evaluated by a cytotoxicity assay against three human cancer cell lines (colorectal carcinoma cells: HCT 116 and HCT 116 TP53 –/– and breast adenocarcinoma, MCF 7). For all assays, the IC50 values of isolated compounds ranged between 0.8 and 7.3 μM. CyO17 was the most potent cyclotide for the colorectal cancer cell lines (IC50, 0.8 and 1.2 μM). Furthermore, the hemolytic activity of anpy A and B, cyO4, and cyO17 was assessed, and the cycloviolacins were the least hemolytic (HD50 > 156 μM). This work sheds light on the cytotoxic effects of the anpy cyclotides against cancer cells. Moreover, this study expands the number of cyclotides obtained to date from Brazilian plant biodiversity and adds one more genus containing these molecules to the list of the Violaceae family.

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Systematic studies in Neotropical Rinorea (Violaceae): Two new sections and a new generic segregate

Cited by 2 publications

References 9 publications

Towards a dynamic list of Amazonian tree species

Towards a dynamic list of Amazonian tree species

Cytotoxic Cyclotides from Anchietea pyrifolia, a South American Plant Species

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