trié(s) par (Pertinence décroissant(e), Titre croissant(e)) 

Assessing the genuine identity of alien Vallisneria (Hydrocharitaceae) species in Europe / Attila Mesterházy in Aquatic Botany, vol. 174 (Année 2021)

Public [article]  inAquatic Botany > vol. 174 (Année 2021) . - 103431 Titre : Assessing the genuine identity of alien Vallisneria (Hydrocharitaceae) species in Europe Type de document : texte imprimé Auteurs : Attila Mesterházy, Auteur ; G. Somogyi, Auteur ; Andrey Efremov, Auteur ; Filip Verloove, Auteur Année de publication : 2021 Article en page(s) : 103431 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Hydrocharitaceae [Espèces (in biblio)] Vallisneria [Thèmes] Taxonomie Mots-clés : plante aquatique  Macrophyte Résumé : "The genus Vallisneria consists of linear-leaved aquatic plants within the Hydrocharitaceae family. Only one indigenous member (V. spiralis) occurs in Europe. Populations of alien species appeared in some European countries in recent decades and these were named in various ways. To clarify the identity of alien Vallisneria we collected samples for a molecular phylogenetic analysis from six populations in five European countries. We investigated the nuclear ribosomal Internal Transcribed Spacer (ITS) region. Based on our results we found that samples from Belgium, Germany, Hungary and Italy belong to the recently described V. australis, a species native to Australia, while a sample from Russia is identical with V. neotropicalis. We provide a key to distinguish these from other similar species. All populations probably derived from dumped plant parts in the drainage water from aquariums. Most populations of V. australis are established and this species might therefore become invasive in the future. The investigated V. australis populations proved to be not uniform genetically." (source : auteurs) Type de publication : périodique Référence biblio : Mesterházy A., Somogyi G., Efremov A., Verloove F., 2021 - Assessing the genuine identity of alien Vallisneria (Hydrocharitaceae) species in Europe. Aquatic Botany, 174 : 103431. ID PMB : 70997 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70997 [article]

Exemplaires(0)

Disponibilité
aucun exemplaire

Flood induced phenotypic plasticity in amphibious genus Elatine (Elatinaceae) / Attila Molnar in PeerJ, 3 (2015)  

Public [article]  inPeerJ > 3 (2015) . - e1473 Titre : Flood induced phenotypic plasticity in amphibious genus Elatine (Elatinaceae) Type de document : texte imprimé Auteurs : Attila Molnar, Auteur ; János Pál Tóth, Auteur ; Gábor Sramkó, Auteur ; Orsolya Horváth, Auteur ; Agnieszka Janiak, Auteur ; Attila Mesterházy, Auteur ; Balázs Andras Lukacs, Auteur Année de publication : 2015 Article en page(s) : e1473 Langues : Anglais (eng) Mots-clés : adaptation  macrophyte  morphologie des graines  culture  graine  charactéristique végétative Résumé : "Vegetative characters are widely used in the taxonomy of the amphibious genus Elatine L. However, these usually show great variation not just between species but between their aquatic and terrestrial forms. In the present study we examine the variation of seed and vegetative characters in nine Elatine species (E. brachysperma, E. californica, E. gussonei, E. hexandra, E. hungarica, E. hydropiper, E. macropoda, E. orthosperma and E. triandra) to reveal the extension of plasticity induced by the amphibious environment, and to test character reliability for species identification. Cultivated plant clones were kept under controlled conditions exposed to either aquatic or terrestrial environmental conditions. Six vegetative characters (length of stem, length of internodium, length of lamina, width of lamina, length of petioles, length of pedicel) and four seed characters (curvature, number of pits / lateral row, 1st and 2nd dimension) were measured on 50 fruiting stems of the aquatic and on 50 stems of the terrestrial form of the same clone. MDA, NPMANOVA Random Forest classification and cluster analysis were used to unravel the morphological differences between aquatic and terrestrial forms. The results of MDA cross-validated and Random Forest classification clearly indicated that only seed traits are stable within species (i.e., different forms of the same species keep similar morphology). Consequently, only seed morphology is valuable for taxonomic purposes since vegetative traits are highly influenced by environmental factors." (source : auteurs) Type de publication : périodique Référence biblio : Molnar A., Pál Tóth J., Sramkó G., Horváth O., Janiak A., Mesterházy A., Lukacs B., 2015 - Flood induced phenotypic plasticity in amphibious genus Elatine (Elatinaceae). PeerJ, 3 : e1473. ID PMB : 65364 En ligne : https://peerj.com/articles/1473.pdf Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=65364 [article]

Exemplaires(0)

Disponibilité
aucun exemplaire

---

1 (1 - 2 / 2) Par page : 25 50 100 200