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Auteur Dan Wolkowycki |
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Differentiation and Propagation Potential of Arnica montana L. Achenes as a Consequence of the Morphological Diversity of Flowers and the Position of Flower Heads on the Plant / Piotr Sugier in Plants, 11 (2022)
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Titre : Differentiation and Propagation Potential of Arnica montana L. Achenes as a Consequence of the Morphological Diversity of Flowers and the Position of Flower Heads on the Plant Type de document : Numérique Auteurs : Piotr Sugier ; Anna Rysiak ; Danuta Sugier ; Krystyna Winiarczyk ; Dan Wolkowycki ; Alksander Kolos Année de publication : 2022 Article en page(s) : 3424 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Morphologie végétale Mots-clés : Arnica montana L., 1753 Résumé : Arnica montana L. is a very important medicinal plant and simultaneously a European endemic endangered plant species. The morphological features and details of seed development and achene variability are poorly recognized. The aim of this study was to determine the impact of the achene position in the infructescence and the location of the inflorescence on the plant on the (i) morphological characteristics and germination ability of achenes, and (ii) recruitment of seedlings and their biometric features. Infructescences containing fully ripe achenes were randomly collected from A. montana individuals for the measurements and the germination experiment. Scanning electron microscopy, fluorescence microscopy, and light microscopy were used for characterization of flowers and achenes. The morphological traits of achenes and reproductive characteristics of A. montana were determined by the position of the achenes in the infructescence and the location of the inflorescence on the plant. The surface of arnica achenes is equipped with non-glandular and glandular trichomes, which is very rarely presented in species of the family Asteraceae. It is possible that the fluid-containing glandular trichomes are a source of essential oils. The peripherally located achenes were longer, thinner, and lighter. They were characterized by lower embryo weight, lower embryo/achene weight ratio, and lower germination capacity in comparison to the centrally located ones. The results presented in this article fill the gap in the knowledge of the morphology of achenes and the biology of the species, and provide information that can help in breeding programs, active protection, and field cultivation. Lien pérenne : DOI : 10.3390/plants11243424 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=154879
in Plants > 11 (2022) . - 3424Sugier, Piotr, Rysiak, Anna, Sugier, Danuta, Winiarczyk, Krystyna, Wolkowycki, Dan, Kolos, Alksander 2022 Differentiation and Propagation Potential of Arnica montana L. Achenes as a Consequence of the Morphological Diversity of Flowers and the Position of Flower Heads on the Plant. Plants, 11: 3424.Documents numériques
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article (2022)Adobe Acrobat PDFMonograph of invasive plants in Europe N°6: Asclepias syriaca L / Swen Follak in Botany letters, 168 (3) (2021)
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Titre : Monograph of invasive plants in Europe N°6: Asclepias syriaca L Type de document : Imprimé Auteurs : Swen Follak ; László Bakacsy ; Franz Essl (1973-) ; Lisa Hochfellner ; Katharina Lapin ; Michael Schwarz ; Barbara Tokarska-Guzik ; Dan Wolkowycki Année de publication : 2021 Article en page(s) : 422-451 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Asclepias syriaca L., 1753 Résumé : This work synthesizes all aspects of Asclepias syriaca L. (Apocynaceae) including the taxonomy, distribution, history of introduction and spread, ecology, biology, uses and benefits, impacts on biodiversity and agriculture, legislation, and management. Asclepias syriaca is a perennial broad-leaved species native to North America. Introduced for ornamental and various other purposes, such as a source of fibre and rubber, it has become established in many regions of Europe and it had increasingly spread in the last decades (>1980s). Its reproductive behavior is characterized by a high production of wind-dispersed seeds and by the propagation of creeping lateral rhizomes, which allows the species to proliferate rapidly. The species persists in a wide range of edaphic and climatic environments. It occurs particularly in anthropogenic and (semi-)natural habitats, such as roadsides, agricultural land, abandoned sites and grasslands, open shrubland, and forests, respectively. Studies have demonstrated negative impacts on the biodiversity and ecosystem processes in invaded regions, namely in open sand grasslands in Hungary. Asclepias syriaca occurs as a competitive weed in crop fields. Since 2017, the species is regulated by the European Union (EU) under the Regulation No. 1143/2014, which states that A. syriaca is subjected to restrictions such as a ban on importing, selling, breeding and that EU member states are required to place effective management measures. Awareness raising activities are important to inform the public, farmers and stakeholders about the risks of this invasive alien plant. Effective direct control options include mechanical control as well as herbicide application. Lien pérenne : DOI : 10.1080/23818107.2021.1886984 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149366
in Botany letters > 168 (3) (2021) . - 422-451Follak, Swen, Bakacsy, László, Essl, Franz (1973-), Hochfellner, Lisa, Lapin, Katharina, Schwarz, Michael, Tokarska-Guzik, Barbara, Wolkowycki, Dan 2021 Monograph of invasive plants in Europe N°6: Asclepias syriaca L. Botany letters, 168(3): 422-451.Exemplaires (1)
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