Phylogenetic relationships in <i>Nuphar</i> (Nymphaeaceae): evidence from morphology, chloroplast DNA, and nuclear ribosomal DNA

Padgett, Donald J.; Les, Donald H.; Crow, Garrett E.

doi:10.2307/2656779

Cited by 52 publications

(33 citation statements)

References 27 publications

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“…Mit Hilfe von morphologischen und molekularen Methoden wird diese allmählich entschlüsselt (Padgett 1998(Padgett , 1999Padgett et al 1998Padgett et al , 1999. Das Entstehen von Hybriden von N. pumila und N. lutea (N. x intermedia Lebed.)…”

Section: Diskussionunclassified

Vorkommen der Kleinen Teichrose Nuphar pumila und des Hybrids N. x intermedia in der Schweiz

Kozlowski

Eggenberg

2005

Bot. Helv.

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Kozlowski G. and Eggenberg S. 2005. Distribution of the least water-lily (Nuphar pumila) and the hybrid N. x intermedia in Switzerland. Bot. Helv. 115: 125-136.The least water-lily (N. pumila (TIMM.) DC) is very rare and endangered in Switzerland and Central Europe. To provide a basis for its conservation, we present a distribution map with all natural, re-introduced and extinct populations in Switzerland. Only four natural populations of N. pumila still exist in Switzerland: Lac de Lussy and Lac des Joncs (FR), Gräppelensee (SG), and Kämmoosteich (ZH). These populations and their sites (lakes) are described, and the co-occurring plant species are listed. Results suggest that the populations from Kämmoosteich and Lac de Lussy are affected by hybridisation and competition with N. lutea. In these two lakes, the hybrid N. x intermedia was very abundant. The presence of N. lutea and N. intermedia in Kämmoosteich and Lac de Lussy should be regarded as one of the most serious threats of pure N. pumila populations. To facilitate further investigation and conservation field work, a detailed morphological description of the two taxons is presented and illustrated by original drawings. To escape extinction in Switzerland, N. pumila needs further appropriate action plans for all natural and newly re-introduced sites as well as an improved knowledge of its genetic structure and habitat preferences.Key words: Conservation biology, distribution map, endangered plant species, hybridisation, Nupharetum pumili, Nympheaceae. EinleitungWährend des letzten Jahrhunderts hat sich unsere Landschaft in vielen Regionen stark verändert; damit wurde auch die Pflanzenwelt erheblich beeinträchtigt. Besonders bedroht sind Arten feuchter Standorte, deren natürliche Lebensgrundlagen durch Entwässerung, Torfausgrabungen und Intensivierung der Landwirtschaft weitgehend 1 Published in "Botanica Helvetica 115(2): 125 -136, 2005" which should be cited to refer to this work.

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Section: Diskussionunclassified

Vorkommen der Kleinen Teichrose Nuphar pumila und des Hybrids N. x intermedia in der Schweiz

Kozlowski

Eggenberg

2005

Bot. Helv.

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“…The genus Nuphar (Nymphaeaceae), with its 10-15 species, is a conspicuous component of the freshwater flora throughout most of the Northern Hemisphere (Padgett 1998(Padgett , 2007Padgett et al 1999;Preston and Croft 2001). The least water-lily (N. pumila (TIMM.)…”

Section: Study Speciesmentioning

confidence: 99%

“…N. pumila shares a common ancestor with the widespread lowland species Nuphar lutea, and both taxa form a fertile hybrid, named Nuphar 9 spenneriana Gaudin (Padgett et al 1999;Roweck and Reinöhl 1986;Roweck 1988), that usually occurs in areas where the distributions of both parental species overlap (Heslop-Harrison 1953, 1955. The hybrid Nuphar 9 intermedia is diploid and has the same chromosome number (2n = 34) as both parental species and all other Nuphar spp.…”

Section: Introductionmentioning

confidence: 99%

Hybridization as a threat in climate relict Nuphar pumila (Nymphaeaceae)

Arrigo

Bétrisey

Graf³

et al. 2016

Biodivers Conserv

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Field studies and conceptual work on hybridization-mediated extinction risk in climate relicts are extremely rare. Nuphar pumila (Nymphaeaceae) is one of the most emblematic climate relicts in Europe with few isolated populations in the Alpine arc. The extent of introgression with related lowland and generalist species Nuphar lutea has never been studied using molecular methods. All biogeographical regions where N. pumila naturally occurs in the neighbourhood of the Alpine arc were sampled and studied using nuclear microsatellite markers. Furthermore, we used forward-in-time simulations and Approximate Bayesian Computation to check whether an introgression scenario fits with the observed admixture patterns and estimated the demographic parameters associated with this process. Our study confirms ongoing hybridization between N. pumila and N. lutea and validates it by the use of population models. More than 40 % of investigated N. pumila individuals were admixed and hybrids were found in over 60 % of studied populations. The introgression is bidirectional and is most likely a result of very recent gene flow. Our work provides strong evidence for rapid extinction risk and demographic swamping between specialized climatic relicts and closely related generalists. The remaining pure populations of N. pumila are rare in the Alpine arc and deserve high conservation priority.

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“…A phylogenetic study carried out on the genus Nuphar (Nymphaeaceae) has shown fruit characters to be informative where floral and the fruit characters supported the geographic grouping of species (Padgett et al, 1999). During the present study, fruit characters were not included as data were not coded for all individuals.…”

Section: Discussionmentioning

confidence: 99%

‘Tel-olu’ – is it really an ‘Olu’?

Yakandawala

Paebotuwage

2009

Ceylon J. Sci. (Biol. Sci.)

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The genus Nymphaea L. has two species in Sri Lanka, N. nouchali Burm. f. and N. pubescens Willd., which are commonly known by the vernacular names 'Manel' and 'Et-olu' or 'Olu' respectively. Apart from these two commonly known Nymphaea species, another group exists by the vernacular name 'Tel-olu' which has not been recorded in the literature. Field experience also indicated the occurrence of several morphological variants of 'Olu' with very distinct character combinations that are not listed under the presently recognized species descriptions. Therefore, a phenetic analysis of morphological and anatomical data was undertaken to evaluate the existence of any other species of Nymphaea in Sri Lanka. Individuals representing species of Nymphaea were studied in detail and coded for morphological and anatomical characters. Multivariate methods of analysis, Cluster Analysis and Principal Component Analysis were carried out. The resulting clusters were evaluated based on the characters identified. The study revealed that the Nymphaea that is commonly known by the vernacular name 'Tel-olu' is not an 'Olu' species but a 'Manel'. Further, 'Tel-olu' showed several distinct morphological features separating it from 'Manel'. Therefore, the study confirms the presence of an additional Nymphaea species in Sri Lanka.Further studies are needed to confirm its identity.

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Phylogenetic relationships in Nuphar (Nymphaeaceae): evidence from morphology, chloroplast DNA, and nuclear ribosomal DNA

Cited by 52 publications

References 27 publications

Vorkommen der Kleinen Teichrose Nuphar pumila und des Hybrids N. x intermedia in der Schweiz

Vorkommen der Kleinen Teichrose Nuphar pumila und des Hybrids N. x intermedia in der Schweiz

Hybridization as a threat in climate relict Nuphar pumila (Nymphaeaceae)

‘Tel-olu’ – is it really an ‘Olu’?

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