Ronald Viane

Ronald Viane
Ghent University | UGhent · Department of Biology

PhD

About

116
Publications
49,442
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1,113
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Introduction
Ronald Viane retired from the Department of Biology, Ghent University but still does research in Botany. His current projects are on Aspleniaceae in the Flora of the Pan-Himalay, Madagascar and Europe.
Additional affiliations
January 1977 - present
Ghent University

Publications

Publications (116)
Article
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A new name is given for Asplenium ×confluens (T. Moore ex E.J. Lowe) Lawalrée
Book
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This revision of Aspleniaceae from Madagascar. In the last treatment (1958) of this family a total of 60 species were recognized. This revision includes two genera (Hymenasplenium and Asplenium) with 96 species (64% endemic), 15 varieties (80% endemic), 8 forms (75% endemic), and 18 endemic hybrids.
Preprint
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This revision is a fundamental part of Aspleniaceae in the new flora of Madagascar's pteridophytes (lycophytes and ferns) by F. Rakotondrainibe and collaborators. It is based largely on the herbarium collections of the National Museum of Natural History (MNHN) in Paris. In the last treatment of this family 60 species were recognized. This revision...
Article
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In 2014 James J. Georgusis reported that a chance hybrid between Phlebodium aureum ‘Mandaianum’ and Pyrrosia lingua ‘Cristata’ had originated in his greenhouse in Metairie, Louisiana (USA). Though we initially were inclined to consider it a bizarre mutation of one of its putative progenitors, further study of its morphology and its nuclear 2C DNA c...
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A new diploid taxon within the Dryopteris affinis complex is described from the Island of Arran, Scotland: D. affinis subsp. cluthensis. Its affinities are discussed and distinguishing features outlined. INTRODUCTION A distinct form within the Dryopteris affinis (Lowe) Fraser-Jenk. complex was recognised by the first author (A.R.C.) in Kingscross,...
Article
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The Asplenium pekinense complex, mainly comprises one diploid A. sarelii (rare), one autotetraploid A. pekinense (best known and very common), and shares two allotetraploids, A. anogrammoides (common but often misidentified) and A. altajense (rare and endemic) with the A. varians complex. The latter is further constituted by two diploids, A. tenuic...
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Background and aims: A key structural adaptation of vascular plants was the evolution of specialized vascular and mechanical tissues, innovations likely to have generated novel cell wall architectures. While collenchyma is a strengthening tissue typically found in growing organs of angiosperms, a similar tissue occurs in the petiole of the fern As...
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Huperzia javanica (Sw.) C. Y. Yang is a valuable medical herb used for treating Alzheimer’s disease. Here, we described the complete chloroplast genome of H. javanica using Illumina paired-end sequencing. The total genome length is 154,415 bp, containing 119 unique genes, with 86 protein-coding genes, 29 tRNA genes, and 4 rRNA genes. The gene conte...
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L'étude des ouvrages et de la collection de Plumier nous amène, pour cette première partie, à présen‑ ter une brève biographie de Plumier, son apport à la botanique et une discussion sur l'existence de ses spécimens de ptéridophytes déposés dans différentes collections historiques de l'herbier de Paris (P). Un tableau comparatif entre les ptéridoph...
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A fern hybrid of the genus Pleopeltis was discovered on Robinson Crusoe Island in the Juan Fernández Archipelago, off the coast of Chile, and is described as P. ×cerro-altoensis. Its putative parents are P. macrocarpa and P. masafuerae, two species present in the archipelago.
Article
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Based on general morphology, spore measurements and ornamentation (SEM), genome size estimation, and molecular systematics (trnL-trnF IGS), we show the extreme systematic complexity within the European representatives of the genus Ophioglossum. In particular, three hybrids from Tuscany are described: the tetraploid O. ×pierinii Peruzzi, Magrini, Ma...
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Background and AimsInnovations in vegetative and reproductive characters were key factors in the evolutionary history of land plants and most of these transformations, including dramatic changes in life cycle structure and strategy, necessarily involved cell-wall modifications. To provide more insight into the role of cell walls in effecting change...
Article
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Plant cell walls are essential for most aspects of plant growth, development, and survival, including cell division, expansive cell growth, cell-cell communication, biomechanical properties, and stress responses. Therefore, characterizing cell wall diversity contributes to our overall understanding of plant evolution and development. Recent biochem...
Article
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CARLO ARGENTI, FRANCA FRATOLIN, SARA MAGRINI, DINO MARCHETTI, ANNA SCOPPOLA & RONALD VIANE -First report for Italy of two populations of really exaploid Ophioglossum (O. «azoricum» C. Presl., Ophioglossaceae, Pteridophyta). We report two stations of Ophioglossum «azoricum» C. Presl hexaploid in Veneto and Lati-um. They are the first in Italy, becau...
Chapter
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PDF version does not have an ISBN or ISSN and is not therefore effectively published (Melbourne Code, Art. 29.1). The printed version, however, was effectively published on 6 June 2013. Lin, Y. X. et al. [total: 59 authors]. 2013. Pteridophytes [introduction, authors and addresses, systematic list, glossary, and key to tribes]. Pp. Plants with a re...
Article
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Recent cytological investigations of Asplenium ×pagesii Litard. sensu lato (A. foreziense × A. trichomanes) have shown that R. de Litardière's original descriptions, based on morphological characters, refer to triploid plants for A. ×guichardii, and to tetraploid ones for A. ×pagesii. These hybrids have A. foreziense and respectively A. trichomanes...
Article
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Hybrid horsetails in Equisetum subgenus Hippochaete are superficially similar. Distinguishing the different taxa depends on the micromorphology of the stem ridges. In the case of the hybrids E. 6trachyodon (E. hyemale6E. variegatum) and E. 6meridionale (E. ramosissimum6E. variegatum) both inherit silica tubercles that run vertically along the stem...
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First record of Dryopteris affinis s. str. (Dryopteridaceae, Pteridophyta) in North Rhine-Westphalia. In Central Europe, five taxa of the Dryopteris affinis complex are now considered to be separate species, four of which occur in North Rhine-Westphalia. These include the triploid D. borreri, by far most com-mon species, and two other triploid spec...
Article
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Common juniper (Juniperus communis L.) populations in northwest European lowlands are currently declining in size and number. An important cause of this decline is a lack of natural regeneration. Low seed viability seems to be one of the main bottlenecks in this process. Previous research revealed a negative relation between seed viability and both...
Article
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REMO BERNARDELLO, DINO MARCHETTI, CAROLINE VAN DEN HEEDE & RONALD VIANE -Asplenium ×ligusticum Bernardello, Marchetti, Van den heede et Viane (Aspleniaceae, Pteri-dophyta), a new hybrid from Liguria. A new hybrid of Asplenium is described from Liguria (Italy). den heede et Viane (Aspleniaceae, Pteri-dophyta), ibrido nuovo in Liguria. Viene descritt...
Article
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ABSTRACT -Our review of the history of the various names used for the fern presently called Asplenium foreziense Legrand ex Magnier showed that no type specimen had ever been designated for this taxon. A study of the literature and of herbarium specimens enabled us to select a type specimen and to lectotypify this taxon. Its correct orthography and...
Article
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Dryopteris expansa (C. PRESL) FRASER-JENKINS & JERMY und D. × ambroseae FRASER-JENK. & JERMY (Dryopteridaceae) in Nordrhein-Westfalen – Identifizierung, Verbreitung, Ökologie Dryopteris expansa (C. PRESL) FRASER-JENKINS & JERMY and D. × ambroseae FRASER-JENK. & JERMY (Dryopteridaceae) in North Rhine-Westphalia – identification, distribution, ecolog...
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Background and Aims Interspecific Diphasiastrum hybrids have been assumed to be homoploid and to produce well-formed spores serving sexual reproduction. If this were the case, forms intermediate between hybrids and parents or hybrid swarms should be expected. The purpose of this study was: (1) to check whether homoploidy consistently applies to the...
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The anatomy of Equisetum stems is characterized by the occurrence of vallecular and carinal canals. Previous studies on the carinal canals in several Equisetum species suggest that they convey water from one node to another. Cell wall composition and ultrastructure have been studied using immunocytochemistry and electron microscopy, respectively. S...
Article
Cell wall appositions (CWAs), formed by the deposition of extra wall material at the contact site with microbial organisms, are an integral part of the response of plants to microbial challenge. Detailed histological studies of CWAs in fern roots do not exist. Using light and electron microscopy we examined the (ultra)structure of CWAs in the outer...
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Extraxylary helical cell wall thickenings in vascular plants are not well documented, except for those in orchid velamen tissues which have been studied extensively. Reports on their occurrence in ferns exist, but detailed information is missing. The aim of this study is to focus on the broad patterns of structure and composition and to study the t...
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This annotated catalogue is a summary of observations (Haou) used to compare with the older literature on the flora of Algeria as well as with modern systematic works on the Pteridophytes of Europe.
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'Loxoscaphoid' Asplenium species are morphologically a remarkably distinct group of Aspleniaceae. Except for two preliminary chromosome counts of Asplenium theciferum, the cytology of this group of species has, however, been largely unstudied. Chromosome counts were obtained by acetocarmine squash preparations of one mitotic cell and several meioti...
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Since the development of X-ray computed tomography as a medical diagnostic tool, it was adapted and extended for many scientific applications, including plant structure research. As for many biological studies, sample preparation is of major importance to obtain good-quality images. Therefore, we present a new preparation method for fresh material...
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A new species of Asplenium L. from Ethiopia, A. balense Chaerle & Viane, is described and illustrated. This new species is similar to A. demerkense Hieronymus, which differs in rhizome, scales, and frond morphology, and also in the presence of short false veins in the laminae. The new species resembles A. uhligii Hieronymus, but differs in degree o...
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A list of 59 newly recorded Pteridophytes from the Bukit Baka- Bukit Raya National Park in Central Kalimantan is presented. Nine species are recorded for Indonesian Borneo (Kalimantan) for the first time: Diplazium polycarpum, Pronephrium peltatum var. persetiferum, Pteris asperula, Selliguea enervis, Sphaerostephanos latebrosus, Sphaerostephanos r...
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Isozyme and plastid DNA analysis prove that true A. ceterach occurs on the Canary Islands, in addition to A. aureum and an octoploid taxon. Combining morphological and cytological observations leads to correct determination, but the exospore length alone also allows reliable identification of these Canarian species. Our allozyme data suggest that t...
Article
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Twenty-five neotropical Asplenium taxa with nomenclatural types deposited in the herbaria B, BR and P are lectotypified.
Article
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Projections of cell wall material into the intercellular spaces between parenchymatic cells have been observed since the mid-19th century. Histochemical staining suggested that these intercellular protuberances are probably pectic in nature, but uncertainties about their origin, composition and biological function(s) have remained. Using electron a...
Article
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High-quality sections are indispensable for many scientific studies. Most published methods are often time-consuming or require special devices. We present an easy, quick and low-cost method for oriented embedding of thin structures using glycol methacrylate resin and self-constructed, reusable embedding tools made of overhead transparencies. This...
Article
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Dryopteris x gomerica Gibby & Widén (= D. aemula x guanchica) was until present only known from two localities in La Gomera and Asturias. The spore characters of several records from the north of A Coruña province are presented. Finally, the adaptive consequences of this recurrent hybridization for parent species conservation are discussed.
Article
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Dryopteris x gomerica es el retrocruzamiento tri-ploide de D. guanchica Gibby & Jermy con su paren-tal D. aemula (Aiton) O. Kuntze. Hasta ahora sólo se había citado D. x gomerica en La Gomera (GIBBY & WIDÉN, Fern Gaz. 12: 267-270. 1983) y la sierra asturiana del Sueve (VIANE, Fern Gaz. 13: 247-249. 1988). En los últimos años hemos identificado abun...
Article
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Dryopteris x gomerica Gibby & Widén (= D. aemula x guanchica) hasta ahora solo se había encontrado en dos localidades de La Gomera y Asturias. Se presentan los caracteres de las esporas de varias recolecciones realizadas en el norte de la provincia de A Coruña. Finalmente, se analizan las consecuencias adaptativas de esta hibridación recurrente par...
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False veins in African afro-alpine (2000–4700 m) Asplenium species with long creeping rhizomes and highly dissected leaves are morphologically and anatomically similar to true veins but differ in the absence of a vascular bundle. False veins in Aspleniaceae may have originated by the fusion of leaf lobes, and are more similar to those in Angiopteri...
Article
By use of the DneasyTM Plant Tissue kit (Qiagen Inc.) plant DNA could be extracted from chocolate and related matrices. The polymerase chain reaction (PCR) detection of mitochondrial plant DNA is directly correlated with the length of the amplified fragment indicating shearing of DNA during chocolate production. Hazelnut DNA could be specifically d...
Article
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Recent cytological investigations of Asplenium Xpagesii Litard. sensu lato (A. foreziense X A. trichomanes) have shown that R. de Litardiere's original descriptions, based on morphological characters, refer to triploid plants for A. Xguichardii, and to tetraploid ones for A. Xpagesii. These hybrids have A. foreziense and respectively A. trichomanes...
Article
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Phylogenetic relationships among 20 taxa of the fern genus Asplenium subgenus Ceterach (Filicopsida, represented by 73 accessions) were investigated using DNA sequence data from the nuclear ribosomal internal transcribed spacers (ITS nDNA) and plastid trnL-F intergenic spacer. In addition, a single sample per taxon was used in an analysis of the pl...
Chapter
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Asplenium iskardense, A. kukkonenii, A. semivarians, A. x chasei, A. x dirense, A. x hopei, A. x lacei, and A. x afghanicum are newly described. New combinations include A. caucasicum, and A. tenuicaule var. subvarians; new varietal status under A. lepidum is given to A. haussknechtii. Cytological information on A. aitchisonii is corrected. Comment...