Psychotriae (Rubiaceae) neocaledonicarum specierum nomenclator

Barrabé, Laure; Mouly, Arnaud; Florence, Jacques

doi:10.5252/a2013n2a6

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…Guillaumin from New Caledonia [originally reported as P. douarrei (G. Beauvisage) Däniker; see Barrabé et al. () for nomenclatural explanation]. At least two other species of Ni‐hyperaccumulating Psychotria were subsequently identified from Malaysia (Reeves, ; van der Ent et al., ).…”

mentioning

confidence: 99%

Phylogenetic and geographic distribution of nickel hyperaccumulation in neotropical Psychotria

McCartha

Taylor

Ent

et al. 2019

American J of Botany

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Hyperaccumulation of metals and metalloids is a rare phenomenon, currently known in only about 720 plant species; yet, it has a broad geographic and phylogenetic distribution (Reeves et al., 2017). Hyperaccumulators are defined on the basis of exceptionally high concentrations of a given metallic element in their foliar tissue, exceeding specified criteria that are typically 2-3 orders of magnitude higher than is generally found in most plants and at least one order of magnitude higher than in other plants growing on metalliferous soils (Reeves, 2003;van der Ent et al., 2013). These high concentrations are toxic to normal plants, but hyperaccumulators have sufficient metal tolerance to survive and to reproduce on metalliferous soils, and the majority of such species are restricted to these habitats (Pollard et al., 2014). Hypotheses that have been proposed to explain the evolution of hyperaccumulation (Boyd and Martens, 1992;Boyd, 2014) include tolerance or disposal of substrate metals, drought resistance, allelopathy, "inadvertent" accumulation of the metal via mechanisms for uptake of another element, and defense against herbivores and pathogens.Regulation of elemental uptake, including processes of exclusion, accumulation, and hyperaccumulation, has broad implications for plant biochemistry, physiology, ecology, and evolution. The extreme elemental concentrations found in hyperaccumulators have made them useful systems for study of nutrient acquisition, transport, and homeostasis (van der Ent et al., 2013), plant-herbivore interactions PREMISE: Hyperaccumulation of heavy metals in plants has never been documented from Central America or Mexico. Psychotria grandis, P. costivenia, and P. glomerata (Rubiaceae) have been reported to hyperaccumulate nickel in the Greater Antilles, but they also occur widely across the neotropics. The goals of this research were to investigate the geographic distribution of hyperaccumulation in these species and explore the phylogenetic distribution of hyperaccumulation in this clade by testing related species.METHODS: Portable x-ray fluorescence (XRF) spectroscopy was used to analyze 565 specimens representing eight species of Psychotria from the Missouri Botanical Garden herbarium. RESULTS:Nickel hyperaccumulation was found in specimens of Psychotria costivenia ranging from Mexico to Costa Rica and in specimens of P. grandis from Guatemala to Ecuador and Venezuela. Among related species, nickel hyperaccumulation is reported for the first time in P. lorenciana and P. papantlensis, but no evidence of hyperaccumulation was found in P. clivorum, P. flava, or P. pleuropoda. Previous reports of hyperaccumulation in P. glomerata appear to be erroneous, resulting from taxonomic synonymy and specimen misidentification.CONCLUSIONS: Hyperaccumulation of nickel by Psychotria is now known to occur widely from southern Mexico through Central America to northwestern South America, including some areas not known to have ultramafic soils. Novel aspects of this research include the successful predi...

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confidence: 99%

Phylogenetic and geographic distribution of nickel hyperaccumulation in neotropical Psychotria

McCartha

Taylor

Ent

et al. 2019

American J of Botany

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“…Etymology Barrabé et al (2013) raised the question of an uncertain taxon from the Belep archipelago described in 1860 by Montrouzier as Douarrea alba Montrouz., which was later recognised as Mapouria douarrei Beauvis. by Beauvisage in 1894.…”

Section: Distributionmentioning

confidence: 99%

One new endemic plant species on average per month in New Caledonia, including eight more new species from Île Art (Belep Islands), a major micro-hotspot in need of protection

Gâteblé¹,

Barrabé

McPherson

et al. 2018

Aust. Systematic Bot.

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The New Caledonian biodiversity hotspot contains many micro-hotspots that exhibit high plant micro-endemism, and that are facing different types and intensities of threats. The Belep archipelago, and especially Île Art, with 24 and 21 respective narrowly endemic species (1 Extinct, 21 Critically Endangered and 2 Endangered), should be considered as the most sensitive micro-hotspot of plant diversity in New Caledonia because of the high anthropogenic threat of fire. Nano-hotspots could also be defined for the low forest remnants of the southern and northern plateaus of Île Art. With an average rate of more than one new species described for New Caledonia each month since January 2000 and five new endemics for the Belep archipelago since 2009, the state of knowledge of the flora is steadily improving. The present account of eight new species from Île Art (Bocquillonia montrouzieri Gâteblé & McPherson, Cleidion artense Gâteblé & McPherson, Endiandra artensis Munzinger & McPherson, Eugenia belepiana J.W.Dawson ex N.Snow, Eugenia insulartensis J.W.Dawson ex N.Snow, Macaranga latebrosa Gâteblé & McPherson, Planchonella serpentinicola Swenson & Munzinger and Psychotria neodouarrei Barrabé & A.Martini) further demonstrates the need both to recognise the Belep Islands as a major New Caledonian micro-hotspot and to formulate concrete conservation programs for the archipelago.

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“…Ainsi, il a été montré que chez l'hyper-accumulateur endémique des sols ultramafiques de Nouvelle-Calédonie, Psychotria gabriellae (Baill.) Guillaumin, antérieurement désigné Psychotria douarrei (Rubiaceae) (Barrabé et al, 2013), le transporteur de métal tonoplastique PgIREG1 était très vraisemblablement impliqué dans la très grande tolérance de cette plante envers le nickel. Cette étude a, en particulier démontré que l'expression ectopique de PgIREG1 augmente la tolérance au nickel de la levure et de plantes transgéniques (Arabette des dames ou Arabette de Thalius ; A. thaliana) (Merlot et al, 2014).…”

Section: Note De Rechercheunclassified

“…Psychotria baillonii : Afin de mieux appréhender les mécanismes de l'hyperaccumulation du nickel dans la graine de P. gabriellae, nous avons recherché l'existence de protéines DING chez une autre espèce du genre Psychotria, P. baillonii (famille des Rubiaceae) (Davis et al, 2009 ;Barrabé et al, 2013). Ces deux plantes, P. gabriellae et P. baillonii, vivent en effet dans les mêmes conditions édaphiques et climatiques au Mont Koghi, proche de Nouméa sur la Grande-Terre (Figure 8).…”

Section: Recherche De Protéines Ding Chezunclassified

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Psychotriae (Rubiaceae) neocaledonicarum specierum nomenclator

Cited by 10 publications

References 24 publications

Phylogenetic and geographic distribution of nickel hyperaccumulation in neotropical Psychotria

Phylogenetic and geographic distribution of nickel hyperaccumulation in neotropical Psychotria

One new endemic plant species on average per month in New Caledonia, including eight more new species from Île Art (Belep Islands), a major micro-hotspot in need of protection

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