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'Heracleum mantegazzianum Sommier & Levier' 
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Partager le résultat de cette rechercheFlowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum / Irena Perglova in Preslia, 78 (2006)
Titre : Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum Type de document : Électronique Auteurs : Irena Perglova ; Jan Pergl (1977-) ; Petr Pyšek Année de publication : 2006 Article en page(s) : 265-285 Langues : Anglais (eng) Catégories : [Thématique] Biologie de la reproduction
[Thématique] Plantes subspontanées, naturalisées, envahissantesMots-clés : Heracleum mantegazzianum Sommier & Levier Résumé : Heracleum mantegazzianum is one of the most invasive species in the Czech flora. The present study describes its flowering phenology and assess the effectiveness of protandry in preventing selfing in this self-compatible species, describes the timing of flowering in a heavily invaded area of Slavkovský les (Czech Republic) and estimates fruit set in a large sample of plants, which provides reliable data on the often exaggerated fecundity of this species. The study of flowering phenology revealed that protandry is always effective only within individual flowers, where male and female flowering phases are completely separated. In contrast, anther dehiscence in some flowers can occasionally overlap with stigma receptivity in other flowers in the same umbel, providing an opportunity for geitonogamous (i.e. between-flower) selfing. Nevertheless, the potential for selfing in H. mantegazzianum is determined mainly by an overlap in the male and female flowering phases between umbels on the same plant; at least a short overlap between some umbels was observed in 99% of the plants at the Slavkovský les. Although the degree of protandry in H. mantegazzianum favours outcrossing, the opportunity to self may be of crucial importance for an invasive plant, especially if a single plant colonizes a new location. At Slavkovský les, flowering started within one week (from 20 to 27 June 2002) at all 10 sites. The duration of flowering of an individual plantwas on average 36 days,with maximum of 60 days, and increased significantly with the number of umbels on a plant. In the second half of August, the majority of the fruits were ripe and had started to be shed. The beginning of flowering of a plant was significantly negatively correlated with the number of umbels it had – the earlier a plant started to flower the more umbels it had produced. A significant negative relationship was also found between basal diameter and beginning of flowering; plants with large basal diameters started to flower earlier. An average plant at Slavkovský les produced 20,671 fruits. Of these, 44.6% were produced by the terminal umbel, 29.3% by secondary umbels on satellites, 22.6% by secondary umbels on branches and only 3.5% by tertiary umbels. The estimated fruit number of the most fecund plant was 46,470 – compared to an average plant, the proportional contribution of tertiary umbels increased relative to the primary umbel. This study revealed a significant positive relationship between fecundity and plant basal diameter. Although the results of this study indicate that the fecundity of this species is often overestimated in the literature, the number of fruits produced by H. mantegazzianum provides this invasive species with an enormous reproductive capacity.
in Preslia > 78 (2006) . - 265-285Perglova, I., Pergl, J., Pyšek, P., 2006 - Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum ; Preslia, 78 : 265-285.Documents numériques
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Article (2006)Adobe Acrobat PDF
Titre : Seasonal pattern of germination and seed longevity in the invasive species Heracleum mantegazzianum Type de document : Électronique Auteurs : Lenka Moracova ; Petr Pyšek ; Jan Pergl (1977-) ; Irena Perglova ; Vojtěch Jarošík (1958-2013) Année de publication : 2006 Article en page(s) : 287-301 Langues : Anglais (eng) Catégories : [Thématique] Plantes subspontanées, naturalisées, envahissantes
[Géographique] République TchèqueMots-clés : Heracleum mantegazzianum Sommier & Levier Résumé : We investigated the effects of different temperature regimes and dry storage on germination of H. mantegazzianum (Apiaceae, native to Caucasus) seeds in the laboratory and linked the results with studies of seasonal seed bank depletion in a common garden experiment and under field conditions. Seeds were collected at seven sites in the Slavkovský les region, Czech Republic, cold-stratified for 2 months and germinated at seven temperature regimes. Under all temperature regimes, fresh seeds germinated to significantly higher percentages than older (1, 2, 3 years) seeds. For all storage lengths, seeds germinated best at alternating day/night temperatures of 20/5 °C. The length of the germination period had a significant effect only at low constant temperatures of 2 and 6 °C, where germination percentage increased between 2 and 6 months. Seasonal germination exhibited a distinct pattern, with rapid depletion of seed bank by the first spring after seed burial. Non-dormant seeds were present in the soil early in spring and late in autumn. The higher summer temperatures prevented dormancy breaking and another cold period of at least two months below 10 °C was needed to bring non-germinated seeds out of dormancy. The results suggest that (1) seed dormancy of H. mantegazzianum was not completely broken until the first spring, but that some seeds re-enter or retain dormancy during high summer temperatures and that (2) the threshold needed for breaking the dormancy was achieved gradually during the cold autumn and winter months. However, in a small fraction of seeds the dormancy breaking process took several years. Of seeds buried in 10 different regions of the Czech Republic, on average 8.8% survived 1 year, 2.7% 2 years and 1.2% remained viable and dormant after 3 years of burial. The ability of even small fraction of H. mantegazzianum seeds to survive for at least 3 years can result in re-invasion of this species into controlled sites.
in Preslia > 78 (2006) . - 287-301Moracova, L., Pyšek, P., Pergl, J., Perglova, I., Jarošík, V., 2006 - Seasonal pattern of germination and seed longevity in the invasive species Heracleum mantegazzianum ; Preslia, 78 : 287-301.Documents numériques
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Article (2006)Adobe Acrobat PDFEspèces exotiques envahissantes des milieux aquatiques et associés en France métropolitaine : recueil de fiches d'identification / Florent Lamand (2015)
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Code-barres Cote Support Localisation Section Disponibilité 25471C PEE Rapport d'étude Bureaux PEE Consultable
Titre : Guide d’identification des plantes exotiques envahissant les milieux aquatiques et les berges du bassin Loire-Bretagne Type de document : Imprimé Auteurs : Stéphanie Hudin (1972-) ; Patricia Vahrameev ; Laurent Chabrol (1963-) ; Jacques Haury ; Benjamin Bottner ; Élisabeth Lambert (1958-) ; Francis Olivereau ; Roland Matrat ; Nicolas Pipet ; Grégoire Ricou ; Loïc Anras ; Alain Dutartre ; Eric Gentil ; Serge Gressette ; Stéphane Loriot ; Sylvie Martinant ; Nathalie Pécheux ; Pascal Lacroix ; Jordan Cordier ; Lucien Maman Editeur : Fédération des Conservatoires d’espaces naturels Année de publication : 2010 Importance : 41 p. ISBN/ISSN/EAN : 978-2-9513098-2-1 Langues : Français (fre) Catégories : [Géographique] Bretagne
[Géographique] Loire
[Thématique] Plantes subspontanées, naturalisées, envahissantesMots-clés : Azolla filiculoides Lam. Crassula helmsii (Kirk) Cockayne Egeria densa Planchon Elodea nuttalii (Planchon) St. John Elodea canadensis Michaux Hydrocotyle ranunculoides L. fil. Ludwigia grandiflora (Michaux) Greuter & Burdet Ludwigia peploides (Kunth) P.H. Raven Lagarosiphon major (Ridley) Moss Lemna minuta H.B.K. Myriophyllum aquaticum (Velloso) Verdcourt Ailanthus altissima (Miller) Swingle Ambrosia artemisiifolia L. Aster lanceolatus Willd. Impatiens balfouri Hooker fil. Impatiens glandulifera Royle Impatiens capensis Meerb. Heracleum mantegazzianum Sommier & Levier Bidens frondosa L. Buddleja davidii Franchet Cotula coronopifolia L. Cuscuta australis R. Br. Acer negundo L. Eragrostis pectinacea (Michaux) Nees Carpobrotus edulis (L.) N.E. Br. in E.P. Philipps Cortaderia selloana (Schultes & Schultes fil.) Aschers Xanthium Prunus laurocerasus L. Lindernia dubia (L.) Pennell Paspalum distichum L. Phytolacca americana L. Reynoutria japonica Houtt. Reynoutria japonica-x-sachalinensis Reynoutria x-bohemica Chrtek & Chrtkova Reynoutria sachalinensis (Friedrich Schmidt Petrop.) N Polygonum polystachyum Meisner in Wall. Rhododendron ponticum L. Robinia pseudoacacia L. Senecio inaequidens DC. Baccharis halimifolia L. Solidago canadensis L. Solidago gigantea Aiton Spartina alterniflora Loisel. Conyza bonariensis (L.) Cronq. Conyza floribunda H.B.K. Conyza sumatrensis (Retz.) E. Walker Conyza canadensis (L.) Cronq. Parthenocissus inserta (A.Kern.) Fritsch, 1922 Résumé : Ces fiches ont été réalisées pour mieux connaître et identifier les 29 espèces invasives concernées. Plusieurs rubriques descriptives sont proposées : biologie/écologie, distribution, usages, impacts sur la biodiversité, gestion. De plus, pour chaque espèce, une bibliographie riche est listée. Hudin, S., Vahrameev, P., Chabrol, L., Haury, J., Bottner, B., Lambert, E., Olivereau, F., Matrat, R., Pipet, N., Ricou, G., Anras, L., Dutartre, A., Gentil, E., Gressette, S., Loriot, S., Martinant, S., Pécheux, N., Lacroix, P., Cordier, J., Maman, L., 2010 - Guide d’identification des plantes exotiques envahissant les milieux aquatiques et les berges du bassin Loire-Bretagne, Fédération des Conservatoires d’espaces naturels, [S.l.], 41 p.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24041B JD Rapport d'étude Bureaux PEE Consultable Documents numériques
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Guide d'identification (2010)Adobe Acrobat PDFGuide d’identification des principales plantes exotiques envahissantes du bassin Loire-Bretagne / Stéphanie Hudin (2021)
Titre : Guide d’identification des principales plantes exotiques envahissantes du bassin Loire-Bretagne Type de document : Électronique Auteurs : Stéphanie Hudin (1972-) ; Alan Méheust ; Patricia Vahrameev ; et al. Editeur : Fédération des Conservatoires d’espaces naturels Année de publication : 2021 Importance : 124 p. Langues : Français (fre) Catégories : [Géographique] Bretagne
[Géographique] Loire
[Thématique] Plantes subspontanées, naturalisées, envahissantesMots-clés : Azolla filiculoides Lam. Crassula helmsii (Kirk) Cockayne Egeria densa Planchon Elodea nuttalii (Planchon) St. John Elodea canadensis Michaux Hydrocotyle ranunculoides L. fil. Ludwigia grandiflora (Michaux) Greuter & Burdet Ludwigia peploides (Kunth) P.H. Raven Lagarosiphon major (Ridley) Moss Lemna minuta H.B.K. Myriophyllum aquaticum (Velloso) Verdcourt Myriophyllum heterophyllum Michx., 1803 Ailanthus altissima (Mill.) Swingle, 1916 Ambrosia artemisiifolia L. Aster lanceolatus Willd. Impatiens balfouri Hooker fil. Impatiens glandulifera Royle Impatiens capensis Meerb. Heracleum mantegazzianum Sommier & Levier Bidens frondosa L. Buddleja davidii Franchet Cotula coronopifolia L. Cuscuta scandens Brot. Acer negundo L. Eragrostis pectinacea (Michaux) Nees Carpobrotus edulis (L.) N.E. Br. in E.P. Philipps Gunnera tinctoria (Molina) Mirb Asclepias syriaca L., 1753 Prunus laurocerasus L. Lindernia dubia (L.) Pennell Paspalum distichum L. Phytolacca americana L. Reynoutria japonica Houtt. Reynoutria japonica-x-sachalinensis Reynoutria x-bohemica Chrtek & Chrtkova Reynoutria sachalinensis (Friedrich Schmidt Petrop.) N Rhododendron ponticum L. Robinia pseudoacacia L. Senecio inaequidens DC. Baccharis halimifolia L. Solidago canadensis L. Solidago gigantea Aiton Spartina alterniflora Loisel. Conyza bonariensis (L.) Cronq. Conyza floribunda H.B.K. Conyza sumatrensis (Retz.) E. Walker Conyza canadensis (L.) Cronq. Parthenocissus inserta (A.Kern.) Fritsch, 1922 Symphyotrichum novae-angliae (L.)G.L. Nesom Symphyotrichum novi-belgii (L.) G.L.Nesom, 1995 Symphyotrichum squamatum (Spreng.) G.L.Nesom, 1995 Symphyotrichum x salignum (Willd.) G.L.Nesom, 1995 Symphyotrichum x versicolor (Willd)G.L. Nesom Prunus serotina Ehrh., 1788 Amorpha fruticosa L., 1753 Carpobrotus acinaciformis (L.) L. Bolus Helianthus x-laetiflorus Pers. Cortaderia selloana (Schult. & Schult.f.) Asch. & Graebn., 1900 Xanthium orientale L., 1763 Xanthium orientale subsp. italicum (Moretti) Greuter Lycium barbarum L. Lysichiton americanus Hultén & H.St.John Salpichroa origanifolia (Lam.) Baill., 1888 Pterocarya fraxinifolia (Poir.) Spach Koenigia polystachya (Wall. ex. Meisn.) T.M. Schust. & Reveal Helianthus tuberosus L., 1753 Résumé : Ces fiches ont été réalisées pour mieux connaître et identifier les 29 espèces invasives concernées. Plusieurs rubriques descriptives sont proposées : biologie/écologie, distribution, usages, impacts sur la biodiversité, gestion. De plus, pour chaque espèce, une bibliographie riche est listée. Hudin, S., Méheust, A., Vahrameev, P., et al., 2021 - Guide d’identification des principales plantes exotiques envahissantes du bassin Loire-Bretagne, Fédération des Conservatoires d’espaces naturels, [S.l.], 124 p.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 28332 8030 HUD Livre Bureaux PEE Consultable Documents numériques
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Guide d'identification (2021)URL
