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  • Open Access


  • Open Access


    Orbicules diversity in Oxalis species from the province of Buenos Aires (Argentina)


    BIOCELL, Vol.32, No.1, pp. 41-47, 2008, DOI:10.32604/biocell.2008.32.041

    Abstract Eleven Oxalis L. species from the province of Buenos Aires (Argentina) were investigated with scanning and transmission electron microscopes. We identified four different types and two subtypes of orbicules. We conclude that the close morphological similarity between these species is also reflected in their orbicules, and we suggest that the orbicules morphology may be a useful character in systematic studies. More >

  • Open Access


    Karyotype description of Pomacea patula catemacensis (Caenogastropoda, Ampullariidae), with an assessment of the taxonomic status of Pomacea patula


    BIOCELL, Vol.28, No.3, pp. 279-285, 2004, DOI:10.32604/biocell.2004.28.279

    Abstract Mitotic chromosomes of the freshwater snail Pomacea patula catemacensis (Baker 1922) were analyzed on gill tissue of specimens from the type locality (Lake Catemaco, Mexico). The diploid number of chromosomes is 2n = 26, including nine metacentric and four submetacentric pairs; therefore, the fundamental number is FN = 52. No sex chromosomes could be identified. The same chromosome number and morphology were already reported for P. flagellata, i.e., the other species of the genus living in Mexico. The basic haploid number for family Ampullariidae was reported to be n° =°14 in the literature; so, its reduction to n° =°13 is… More >

  • Open Access


    Leaf margin serration and its taxonomical significance in the genus Hibiscus

    Bhat RB

    Phyton-International Journal of Experimental Botany, Vol.81, pp. 211-213, 2012, DOI:10.32604/phyton.2012.81.211

    Abstract Types of leaf margin serration were investigated in ten species of the genus Hibiscus. Types and frequency of serration varied widely from species to species, from common to occasional to rare. Leaf serration is an important taxonomical feature in Hibiscus. More >

  • Open Access


    Quantitative measures of leaf epidermal cells as a taxonomic and phylogenetic tool for the identification of Stanhopea species (Orchidaceae)

    Foroughbakhch R, RJ Ferry Sr, JL Hernández-Piñero, MA Alvarado-Vázquez, A Rocha-Estrada

    Phyton-International Journal of Experimental Botany, Vol.77, pp. 113-127, 2008, DOI:10.32604/phyton.2008.77.113

    Abstract Orchids of the genus Stanhopea are currently identified only by their floral structure characteristics. A statistical analysis of a significant number of species of this genus disclosed that measurements of adaxial and abaxial epidermal cell surface areas can be correlated with specific recognized species by a leaf printing method. This allows an objectively either positive or nearly positive confirmation of the identity of a species in the absence of flowers and without damage to plants. When ordering the mean values obtained for these surface areas in each species in a decreasing order, a correlation was observed in a hierarchical way… More >

  • Open Access


    Cluster analysis of leaf macro- and micro- morphological characteristics of Vicia L. (Fabaceae) and their taxonomic implication

    Abozeid A1,2, Y Liu1, J Liu1, ZH Tang1

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 306-317, 2017, DOI:10.32604/phyton.2017.86.306

    Abstract The genus Vicia L. belongs to the tribe Vicieae of the Fabaceae family. The genus includes about 190 species, from which about 40 species have economic importance. Some of them are food crops, but more than a dozen are forage plants. In this study, leaves of Vicia species from China, USA and Argentina were examined using stereo-microscopy and light microscopy. We determined macro- and micro-morphological characteristics that could be of taxonomic use. Forty eight characteristics of each taxon were determined including petiole and tendril length; leaflets number, length, width, shape, apex, base; blade surface, trichome shape, type, base and length;… More >

  • Open Access


    Minireview : Old Species and New Concepts in The Taxonomy of Pomacea (Gastropoda: Ampullariidae)


    BIOCELL, Vol.26, Suppl.S, pp. 71-81, 2002

    Abstract The taxonomic history of the South American genus Pomacea Perry, 1810, and some shifts of systematic concepts during recent decades are briefly reviewed. Too many pre-evolutionist, shell-defined species created a gibberish, the only acceptable solution of which being perhaps a conventional, somewhat authoritarian decision based on expertise. The addition of other sources of morphological, biochemical, ecological or genetic information should not solve the problem if it is not accompanied by a sound reappraisal of the species concepts. Since the assumptions of each concept differ, any correspondence between them is irrelevant, and may drive to incompatible results. The shell variability of… More >

  • Open Access


    Morphology and Genetic Studies of Cymodocea Seagrass Genus in Tunisian Coasts

    Ramzi Bchir1,2,*, Aslam Sami Djellouli1, Nadia Zitouna3, Didier Aurelle4, Gerard Pergent2, Christine Pergent-Martini2 and Habib Langar1

    Phyton-International Journal of Experimental Botany, Vol.88, No.2, pp. 171-184, 2019, DOI:10.32604/phyton.2019.05261

    Abstract Specimens of Cymodocea (Viridiplantae, Magnoliophyta) collected on the Tunisian coasts showed a particular morphological and anatomical difference with the classical descriptions of Cymodocea nodosa (Ucria) Asch. the only species of this genus reported in the Mediterranean Sea. In order to precise the taxonomic identity of the new specimens we aimed in this work (i) to verify the identity of the new forms, (ii) to evaluate the genetic diversity of the population, (iii) to test the validity of the existing identification keys of the Tunisian Cymodocea populations. Four stations located in two regions of the Tunisian coasts were sampled. Leaf morphological… More >

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