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Palyno-morphology of Hedera L. (The ivy genus, araliaceae) and their systematics implications / Fahimeh Fallah in Genetika, vol. 53, n°2 (Année 2021)

Public [article]  inGenetika > vol. 53, n°2 (Année 2021) . - pp. 851-865 Titre : Palyno-morphology of Hedera L. (The ivy genus, araliaceae) and their systematics implications Auteurs : Fahimeh Fallah, Auteur ; Farrokh Ghahremaninejad, Auteur Article en page(s) : pp. 851-865 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Hedera [Thèmes] Pollinisation, pollen, nectar Mots-clés : palynologie  systématique Résumé : "The palynomorphological characteristics of 5 species belonging to Hedera of the Araliaceae family were studied in detail. These plant species were collected from various phytogeographical regions of Iran and Hungary. The palynological investigation was accomplished using Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM). Pollen grains of the species are reticulate, prolate, sub-prolate, tricolporate, isopolar, radially symmetrical, and monad. The largest pollen grain was in the Hedera colchica species (72.24±1.6 μm) and the smallest pollen grain was in Hedera helix (28.63±2.1 μm). The research carried out by the TEM showed that the species were different in terms of exine thickness, tectum thickness, foot layer thickness, the diameter and length of the Columella, the thickness and shape of the Caput, the tectum to foot layer )T/F( ratio, the absence or presence of the Endexine and the thickness of the Intine layers. The main purpose of this study was the importance of the relationship between pollen grain size and the number of chromosomes and ploidy level in Hedera species." (source : auteurs) Type de publication : périodique Référence biblio : Fallah F., Ghahremaninejad F., 2021 - Palyno-morphology of Hedera L. (The ivy genus, araliaceae) and their systematics implications. Genetika, 53 (2) : 851-865. ID PMB : 72680 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72680 [article]

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Seed micromorphology and its implication in subgeneric classification of Silene (Caryophyllaceae, Sileneae) / Ehsan Hoseini in Flora, vol. 228 (Année 2017)

Public [article]  inFlora > vol. 228 (Année 2017) . - pp. 31-38 Titre : Seed micromorphology and its implication in subgeneric classification of Silene (Caryophyllaceae, Sileneae) Type de document : texte imprimé Auteurs : Ehsan Hoseini, Auteur ; Farrokh Ghahremaninejad, Auteur ; Mostafa Assadi, Auteur ; Maliheh Nejati Edalatiyan, Auteur Année de publication : 2017 Article en page(s) : pp. 31-38 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Silene [ZG] Iran [Thèmes] Taxonomie Mots-clés : systématique  phylogénie  synapomorphie  graine Résumé : "Silene with more than 700 species worldwide is taxonomically complex and problematic. The previously proposed relationships among species as reflected in the subgeneric classification of the genus were mainly based on overall similarities in morphological traits and were rejected by the majority of executed molecular studies on the genus. On the other hand, no significant morphological synapomorphies for the recovered and well-supported infra-generic groups in the genus were reported by molecular studies. The importance of seed morphology in identification of species in Silene was emphasized in major taxonomic treatments of the genus, but a comprehensive study including a larger group of species is still lacking. This paper reports seed morphology of 42 species of genus Silene representing 22 sections distributed mainly in the area of Flora Iranica. The important characters and character states providing scorable variation were determined. Following seed characters are recognized to be valuable in determination of species and sections in Silene: general shape of the seeds, curvature of the seed lateral face, type of testa cells, development of the seed ridges, the cell surface; the shape of suture between adjacent cells and the state of the hilum. In addition, the phylogeny and current infra-generic classification of the genus is reviewed in light of data obtained from seed micromorphology. The species representing three sections, Conoimorphae, Melandriformes and Sclerocalycinae, show some degree of consistency in the seed features, while such uniformity could not be traced in other sections." (source : auteurs) Type de publication : périodique Référence biblio : Hoseini E., Ghahremaninejad F., Assadi M., Edalatiyan M., 2017 - Seed micromorphology and its implication in subgeneric classification of Silene (Caryophyllaceae, Sileneae). Flora, 228 : 31-38. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66242 [article]

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