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Charophytes in warm springs on Svalbard (Spitsbergen): DNA barcoding identifies Chara aspera and Chara canescens with unusual morphological traits / Anders Langangen in Botany letters, 167 (2) (2020)

Public Citation [article]  inBotany letters > 167 (2) (2020) . - 179-186 Titre : Charophytes in warm springs on Svalbard (Spitsbergen): DNA barcoding identifies Chara aspera and Chara canescens with unusual morphological traits Type de document : Imprimé Auteurs : Anders Langangen, Auteur ; Andreas Ballot, Auteur ; Petra Nowak, Auteur ; Susanne C. Schneider, Auteur Année de publication : 2020 Article en page(s) : 179-186 Langues : Anglais (eng) Mots-clés : Chara Résumé : The Troll springs are warm springs on Svalbard (Spitsbergen). Charophytes were collected in the years 1910, 1912, 1958, 1992/1993, and 2018. However, since the Chara samples showed unusual morphological traits, there were doubts with respect to species identity. We here use DNA barcoding to show that there occur two Chara species in the Troll springs: Chara aspera and C. canescens. Lien pérenne : DOI : 10.1080/23818107.2019.1672104 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=144705 Langangen, Anders, Ballot, Andreas, Nowak, Petra, Schneider, Susanne C. 2020 Charophytes in warm springs on Svalbard (Spitsbergen): DNA barcoding identifies Chara aspera and Chara canescens with unusual morphological traits. Botany letters, 167(2): 179-186.

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
R19206	P-1824	Revue	Centre de documentation	Revues	Consultable

Genetic and morphological variation in Chara contraria and a taxon morphologically resembling Chara connivens / Ivana Trbojević in Botany letters, 167 (2) (2020)

Public Citation [article]  inBotany letters > 167 (2) (2020) . - 187-200 Titre : Genetic and morphological variation in Chara contraria and a taxon morphologically resembling Chara connivens Type de document : Imprimé Auteurs : Ivana Trbojević, Auteur ; Aleksandra Marković, Auteur ; Jelena Blaženčić, Auteur ; Gordana Subakov Simić, Auteur ; Petra Nowak, Auteur ; Andreas Ballot, Auteur ; Susanne C. Schneider, Auteur Année de publication : 2020 Article en page(s) : 187-200 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Algues Résumé : Charophyte species delineation is regularly based on a set of thallus morphological characteristics, but considering pronounced phenotypic plasticity, difficulties and doubts commonly occur in Chara species determination. DNA barcoding may contribute to solving these challenges. Here we characterize Chara contraria with an unusual set of morphological characteristics, and specimens morphologically resembling Chara connivens collected in Serbia, by describing their morphological traits and analysing matK barcoding results. Our results indicated that dioecious Chara specimens, tentatively determined as Chara “connivens”based on morphological traits, were genetically more closely related to C. globularis. These Chara “connivens”specimens formed a sister group to a monophyletic C. globularis cluster, suggesting that it may be neither C. connivens nor C. globularis. We strongly encourage further barcoding of C. “connivens”samples from freshwater, in order to find out if there are consistent genetic differences between the dioecious freshwater C. “connivens”and monoecious C. globularis. Barcoding of matK placed the monoecious Chara specimens, which based on morphological characteristics initially were determined as C. virgata, into the C. contraria group. This indicates that the microscopic traits which commonly are used for Chara species determination sometimes are misleading. In general, our study challenges the commonly used phenetic species concept in Charophyte taxonomy and illustrates the importance of molecular approaches to evaluate the validity of morphological characteristics of the plant thallus in species delineation. Lien pérenne : DOI : 10.1080/23818107.2019.1703808 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=144706 Trbojević, Ivana, Marković, Aleksandra, Blaženčić, Jelena, Subakov Simić, Gordana, Nowak, Petra, Ballot, Andreas, Schneider, Susanne C. 2020 Genetic and morphological variation in Chara contraria and a taxon morphologically resembling Chara connivens. Botany letters, 167(2): 187-200.

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
R19206	P-1824	Revue	Centre de documentation	Revues	Consultable

Is the Mesopotamian region a main source of Western European segetal plants ? / Sami Youssef in Botany letters, 167 (2) (2020)

Public Citation [article]  inBotany letters > 167 (2) (2020) . - 290-299 Titre : Is the Mesopotamian region a main source of Western European segetal plants ? Type de document : Imprimé Auteurs : Sami Youssef ; Jocelyne Cambecèdes ; Errol Véla Année de publication : 2020 Article en page(s) : 290-299 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Messicole Résumé : The Mesopotamian Region is often recognised as the origin of the Western European (W European) segetal plants that have been coevolving with winter cereals since the emergence of agriculture. This eastern origin assumption is based on the close association between cereal domestication and arable weed occurrence. However, it has never been properly tested and the debate of their biogeographical origin continues. Here, we conducted a comparative floristic analysis of the complete French segetal plant list to provide a global comprehension vision on their hypothetic Mesopotamian origin. We found a total of 58 of the 102 segetal French taxa that occur both in the fields and in primary natural habitats in the Upper Mesopotamian Region. In contrast, in France, only 39 species are facultative weeds under the Mediterranean bioclimate while they are obligatory weeds under Temperate bioclimate. A significant part of them is endemic to W Europe occurring in primary natural habitats, and thus contributing to enrich the local segetal assemblage. Contrary to the general belief of their eastern origin, these French segetal taxa are originated from various biogeographical regions (Eurasiatic, European, Eury-Mediterranean, Mediterranean, Mediterranean-Touranian and W-Asiatic) and not only from the Upper Mesopotamian Region. Hence, we propose a hypothetical scheme to illustrate the various segetal assemblages as the result of an accumulative local colonization/extinction process alongside the cereal migration routes. Therefore, primary natural source versus secondary field sink habitats have considerably contributed to the segetal assemblage and thus represent crucial new contributions to our knowledge of their various biogeographical origin. Lien pérenne : DOI : 10.1080/23818107.2020.1737222 / HAL : hal-02539573 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=145251 Youssef, Sami, Cambecèdes, Jocelyne, Véla, Errol 2020 Is the Mesopotamian region a main source of Western European segetal plants ? Botany letters, 167(2): 290-299.

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
R19206	P-1824	Revue	Centre de documentation	Revues	Consultable