Acta Botanica Gallica最新文献

{"title":"Communautés de Characées des lacs médocains (Sud-Ouest de la France). Eléments d’écologie et de distribution","authors":"Vincent Bertrin, S. Boutry, A. Dutartre, Élisabeth Lambert","doi":"10.1080/12538078.2013.812044","DOIUrl":"https://doi.org/10.1080/12538078.2013.812044","url":null,"abstract":"Résumé Les communautés de macrophytes des lacs médocains (lac de Carcans-Hourtin et lac de Lacanau) ont fait l’objet en 2011 d’observations et de prélèvements sur la totalité de la périphérie des rives, ainsi que sur des profils perpendiculaires vers le large de ces plans d’eau. Les communautés végétales aquatiques comportent diverses espèces communes aux milieux lacustres, ainsi que des espèces patrimoniales, telles que les espèces des pelouses à littorelles, mais également des espèces exotiques à caractère envahissant. Les Characées sont bien représentées sur les lacs médocains. Chara fragifera colonise les deux tiers du linéaire des rives sur les deux lacs, jusqu’à une profondeur de 4,5 m sur le lac de Carcans-Hourtin. Nitella confervacea est moins abondante et moins fréquente, elle semble cependant coloniser les secteurs plus profonds des lacs. La répartition de ces deux espèces sur les rives des lacs est relativement homogène, les espèces n’ont pas été observées dans les secteurs d’anses protégées de vents et aux sédiments organiques fluides. Deux autres espèces de Characées, Chara globularis et Nitella translucens, sont également présentes dans ces lacs, mais d’une manière plus localisée. Le résultat de cet examen complet des rives et des prospections vers le large des lacs est cohérent avec les données disponibles dans la littérature. La présence de Chara fragifera et de Nitella confervacea dans les associations des Littorelletalia avec des Phanérogames telles que Lobelia dortmanna et Littorella uniflora, est relativement bien décrite dans ces lacs, mais aucun positionnement géographique des différentes populations de macrophytes n’avait à ce jour été effectué. De nombreuses questions liées à la gestion du niveau des eaux des lacs et à celle des espèces exotiques envahissantes (Lagarosiphon major et Egeria densa principalement) se posent pour la préservation des habitats aquatiques d’intérêt communautaire présents sur ces lacs, mais également pour ceux situés au sud du bassin d’Arcachon le long du littoral aquitain.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"131 - 140"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.812044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of hydrodynamic disturbances on the biomass and architecture of the freshwater macroalga Chara globularis Thuill","authors":"K. Bociąg, Alicja E. Robionek, E. Rekowska, K. Banaś","doi":"10.1080/12538078.2013.822826","DOIUrl":"https://doi.org/10.1080/12538078.2013.822826","url":null,"abstract":"Abstract The effect of wave-induced disturbances in the shallow littoral zone on Chara globularis individuals was studied in three populations located in three different lakes in Poland. In addition, an experiment was performed to check if the observed responses were confirmed in vegetative offspring grown ex situ. Individuals from wave-exposed sites were lighter than those from sheltered ones; they had more ramets and lateral branches. The main axes, branches, internodes and branchlets were shorter. The shortening of the main axis was a statistically significant response in each population. The reduction of biomass of thalli and shortening of branchlets under wave-exposed conditions was statistically significant only in part of the populations. The differences in underground biomass, number of branches, length of internodes and presence of holdfasts among individuals from wave-exposed and sheltered sites in the populations showed inconsistent trends between populations. This suggests a location-specific nature of some of the morphological variations. The vegetative offspring (new ramets obtained ex situ) from the fragments of individuals growing at wave-exposed sites were lighter, smaller, had shorter axes in a statistically significant way in comparison with the offspring from sheltered sites. The observed growth trend was the same as in the case of parent individuals. Hence the response noted in the parent population was confirmed in vegetative offspring. For all the remaining features, differences were more pronounced between new ramets than between parent individuals. Hence, in situ, the phenotypic responses to other environmental factors overlapped with the disturbance-related responses.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"149 - 156"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.822826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evidence of Chara fibrosa Agardh ex Bruzelius, an alien species in South France","authors":"I. Soulié-Märsche, Frédéric Triboit, M. Despréaux, Aurélie Rey-Boissezon, I. Laffont-Schwob, A. Thiéry","doi":"10.1080/12538078.2013.806872","DOIUrl":"https://doi.org/10.1080/12538078.2013.806872","url":null,"abstract":"Abstract The paper describes the discovery of a species of genus Chara, hitherto unknown in France. The morphological features of the plants and oospores are shown and identify the plant as Chara fibrosa ssp. benthamii, a tropical taxon, non-native to the European Charophyte flora. The ecological conditions of this particular find correspond to an artificial temporary pond located in the Crau plain, north of the Camargue. In contrast to the normal hydrological cycle ruled by local precipitation during winter, the studied pond is flooded from irrigation water in late spring and during summer. This context allowed C. fibrosa to out-compete the indigenous Chara species, Chara vulgaris and Chara globularis. The accidental introduction of C. fibrosa is attributed to original contamination from rice seed material imported to the nearby Camargue, rather than to dispersal by migratory water birds. Although the species has formed a very large population in that pond within a few years, it might not be classified as “invasive” because this occurrence is linked to a particular man-made habitat. However, spread of the species in the future, as a function of global warming related to climate change, cannot be excluded.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"157 - 163"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.806872","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tolypella salina R. Cor. on the French Atlantic coast: biology and ecology","authors":"E. Lambert, Didier Desmots, Jean-Luc le Bail, J. Mouronval, J. Felzines","doi":"10.1080/12538078.2013.823105","DOIUrl":"https://doi.org/10.1080/12538078.2013.823105","url":null,"abstract":"Abstract Tolypella salina R. Cor. is a Charophyte only known from some French and Iberian stations. Its rarity and the specific richness of the salt marshes where it grows, on the Atlantic and Mediterranean coasts, have led to the proposal to add this species to the French list of protected plants. A survey of stations was realized on the Atlantic coast (Noirmoutier, Guérande) between 2010 and 2013 to complete the distribution map of this taxon. The aim of this work is to improve the knowledge of this plant’s biology and its ecological environment. It appears that the development of this species differs between stations, and also from one year to the next, a phenomenon due to the instability of its living environment (hydrological and salinity conditions, etc.). Phytosociological considerations related to the subassociation tolypelletosum salinae are added. Some recommendations are proposed for the management of these sites, taking into account the human activities there, in order to maintain the salt marsh mosaic that is necessary for the conservation of Tolypella salina.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"107 - 119"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.823105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The genus Tolypella (A. Braun) A. Braun in the Iberian Peninsula","authors":"Santos Cirujano Bracamonte, Natalia Guerrero Maldonado, P. G. García Murillo","doi":"10.1080/12538078.2013.801321","DOIUrl":"https://doi.org/10.1080/12538078.2013.801321","url":null,"abstract":"Abstract This study focuses on the presence and distribution of the species of Tolypella genus in the Iberian Peninsula through a literature review and the examination of environmental, botanical and physicochemical data of the locations where T. salina, T. prolifera, T. intricata, T. hispanica and T. glomerata are settled. The shortage of herbarium material means that new collections are required to be able to conduct more detailed studies in the future, particularly on T. prolifera and T. intricata, of which the biological traits, ecology and distribution are poorly known in the Iberian Peninsula.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"121 - 129"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.801321","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DNA damage protection, antioxidant and free-radical scavenging activities of Myriophyllum alterniflorum DC (Haloragaceae) vegetative parts","authors":"D. Delmail, M. Abasq, P. Courtel, I. Rouaud, P. Labrousse","doi":"10.1080/12538078.2013.799046","DOIUrl":"https://doi.org/10.1080/12538078.2013.799046","url":null,"abstract":"Abstract DNA damage induced by free radicals is associated with mutation-based health impairment and cancers. The protective effect of five different extracts from an aquatic macrophyte, the alternate water-milfoil Myriophyllum alterniflorum DC (Haloragaceae), is investigated on the DNA disruption mediated by hydroxyl (HO•) and hydroperoxyl (HOO•) radicals, and their antioxidant activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and O2 •−. Indeed, M. alterniflorum is supposed to be a good candidate for DNA protection as this species was recently used in ecological surveys as a bioindicator of water quality because of its ability to cope with and to reflect the heavy-metal pollution through variations of antioxidant contents. Moreover, preliminary results indicated higher levels of scavengers specialized in reactive oxygen species reduction, than common medicinal plants. Acetone and ethanol extracts from vegetative parts limit significantly the oxidative damage of plasmid DNA induced by Fenton-reaction reactive oxygen species. The radical antioxidant activities of acetone and aqueous extracts are higher than those of other solvents: [DPPH] IC50 = 2.4 ± 0.2 mg.ml–1 and [O2 •−] AI50 = 220.0 ± 14.1 μg.ml–1, respectively. Protection towards free radicals is correlated with high contents of antioxidant compounds in acetone extracts [phenol compounds: 21.00 ± 0.69 mg gallic acid.g–1 DW (dry weight)] and aqueous extracts (flavonoids: 125.48 ± 1.26 mg rutin.g–1 DW). Myriophyllum alterniflorum can be regarded as a promising natural-product source of antigenotoxics and antioxidants and could be envisaged for therapeutic purposes.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"165 - 172"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.799046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insights into the systematics and evolution of the filmy fern genus Crepidomanes (Hymenophyllaceae) in the Mascarene Archipelago with a focus on dwarf species","authors":"J. Dubuisson, G. Rouhan, A. Grall, S. Hennequin, B. Senterre, K. Pynee, A. Ebihara","doi":"10.1080/12538078.2013.819294","DOIUrl":"https://doi.org/10.1080/12538078.2013.819294","url":null,"abstract":"Abstract The diversity of species belonging to the filmy fern genus Crepidomanes (Hymenophyllaceae) in the Mascarene archipelago was studied, based on morphological investigations and focusing especially on the most dwarf species that are easily confused in the field and in herbarium collections. Morphological potential clusters and discriminations were then compared with an rbcL phylogeny. As a result, we recognized at least eight morpho-species for the archipelago and defined characters for distinguishing the three smallest ones, Crepidomanes bonapartei, Crepidomanes minutum and Crepidomanes (Trichomanes) trinerve. Morphological evidence and molecules confirm the specific status for T. trinerve (newly combined in Crepidomanes), the inclusion of Crepidomanes mannii into a C. minutum complex, and new records of C. bonapartei for Mauritius. The neotropical Polyphlebium pyxidiferum is found to be closely related to Afro-Madagascan Crepidomanes inopinatum and Crepidomanes melanotrichum species and so is newly combined in Crepidomanes. A key for the eight species of the genus in the archipelago, description of a new section clustering Crepidomanes frappieri and Crepidomanes longilabiatum, and new enhanced descriptions for two dwarf taxa (C. bonapartei and C. trinerve) are provided, and biogeographical origins of the genus in the Western Indian Ocean area are discussed.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"173 - 194"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.819294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contribution à la connaissance de quelques Characées du Nord de la France","authors":"J. Delay, D. Petit","doi":"10.1080/12538078.2013.819295","DOIUrl":"https://doi.org/10.1080/12538078.2013.819295","url":null,"abstract":"Abstract Survey of the hydrophytic flora of small stretches of water in northern France has allowed the observation of several taxa of the Characeae family here reported, namely Chara vulgaris, Chara vulgaris f. longibracteata, Chara globularis, Chara curta, Nitella gracilis and Tolypella glomerata. According to current literature, 25 taxa within Characeae are present in northern France, at species, variety or form level. Chara vulgaris, as a complex, is very frequently found in northern France in newly created stretches of water. It colonizes meso-eutrophic waters and shows a cosmopolitan distribution. The type species seems to be rarer locally than the longibracteata form, but more investigations are needed to confirm this observation. Chara globularis has been recorded on the coastline of northern France, in the peat bogs at the back of the coastline, in the humid dune slacks and further inland where the plant can survive winter, in some mining slag ponds in the area of Valenciennes, the water of which has been qualified as sub-briny. Nitella gracilis in the area is perceived as a meso-eutrophic to oligo-mesotrophic water species, although in Brittany and Germany its presence has been noted in acidophilous communities together with Potamogeton polygonifolius, Littorella uniflora or Sphagnum spp. The species is mostly present in western France, and is very rare in eastern France. Tolypella glomerata has been very rarely observed in northern France. The observation here reported in a small pond on the hill of Marchenelles is only the third report in the area. The species is not expressed there as a monospecific community (as usually reported) and must be searched for within a very dense Chara vulgaris var. longibreactata cover that develops in early spring. To facilitate the identification of these plants in the field, an illustrated description of each taxa identified has been provided.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"141 - 148"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.819295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Résultats d’investigations phytosociologiques récentes au Liban central","authors":"Bruno de Foucault, Marc El Beyrouthy, N. Arnold-Apostolidès","doi":"10.1080/12538078.2013.772498","DOIUrl":"https://doi.org/10.1080/12538078.2013.772498","url":null,"abstract":"Résumé Nous présentons ici le résultat des investigations phytosociologiques menées dans la partie centrale du Liban ; notamment nous décrivons les syntaxons nouveaux suivants : Querco infectoriae – Pinetum pineae, Pistacio palaestinae – Cytisetum lanigeri, Sarcopoterio spinosi – Cistetum salviifolii, Salici acmophyllae – Hypericetum hircini, et Mentho microphyllae – Dorycnietum recti. La composition floristique et la structure de ces syntaxons ont été définies en utilisant l’approche synusiale de l'étude de la végétation. Des comparaisons avec ce qui est connu dans les pays voisins sont présentées.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"110 1","pages":"65 - 75"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.772498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59704837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A test of four candidate barcoding markers for the identification of geographically widespread Chimaphila species (Pyroleae, Ericaceae)","authors":"Z. Liu, Qian Ru Zhao, Jing Zhou","doi":"10.1080/12538078.2013.773462","DOIUrl":"https://doi.org/10.1080/12538078.2013.773462","url":null,"abstract":"Abstract DNA barcoding has been widely used as a tool for species discrimination in closely related plants and at more coarse taxonomic levels, but there have been few reports of such a tool being applied to taxa in “morphological stasis”. In this study, we test the performance of core barcodes (rbcL and matK) and two additional candidate barcodes [psbA-trnH and nuclear ribosomal internal transcribed spacer (ITS)] for the widely distributed, northern temperate monophyletic genus Chimaphila, which exhibits morphological conservatism. In addition to ITS, slowly evolving rbcL and matK independently demonstrate a high resolving ability among Chimaphila species, indicative of the old age of disjunction. We tentatively attribute morphological stasis in Chimaphila to convergence under similar habitat conditions and complex, stable relationships with surrounding autotrophic trees via common mycorrhizal symbioses.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"11 - 17"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.773462","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59704929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}