The distribution of Elatine hexandra (Lapierre) DC. (Elatinaceae)

Popiela, Agnieszka; Łysko, Andrzej; Wieczorek, Andrzej; Nalepka, Dorota

doi:10.5586/asbp.2011.004

Cited by 10 publications

(7 citation statements)

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“…Recently, Elatine species have been of interest to researchers because of their rarity throughout their range, relatively poorly known distribution and taxonomy, ecology, karyology and phylogenetic relationships (e.g., Popiela, 2005; Misfud, 2006; Uotila, 2009a; Uotila, 2010; Popiela & Łysko, 2010; Popiela & Łysko, 2011; Popiela et al, 2011; Popiela et al, 2012; Popiela, Łysko & Molnár, 2013; Popiela et al, 2015; Takács, 2013; Molnár et al, 2013; Molnár, Popiela & Lukács, 2013; Šumberova & Hrivnak, 2013; Kalinka et al, 2014; Kalinka et al, 2015; Cai et al, 2016; Sramkó et al, 2016). The above-mentioned authors emphasized that the erratic temporal appearance of Elatine species depends mainly on environmental factors; for example, plants develop as aquatic or terrestrial forms, and, moreover, they are morphologically variable depending on the phase of drying on the ground.…”

Section: Introductionmentioning

confidence: 99%

Seed morphometric characteristics of European species of Elatine (Elatinaceae)

Popiela

Łysko

Białecka

et al. 2017

PeerJ

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Elatine L. contains ca. 25 small, herbaceous, annual species distributed in ephemeral waters in both hemispheres. All species are amphibious and characterized by a high degree of morphological variability. The importance of seed morphology in Elatine taxonomy has been emphasized by many authors. The degree of seed curvature and seed coat reticulation have been traditionally considered very important in recognizing individual species of this genus. Seed morphometric characteristics of 10 Elatine species, including all European native taxa, are provided on the basis of material from two or three populations of each species. A total of 24-50 seeds were studied from each population, altogether 1,260 images were used for the morphometric study. In total, six parameters were measured from SEM pictures: object surface area, profile specific perimeter (object circuit), rectangle of the object (a) length, rectangle of the object (b) width, angle of the seed curvature, and number of pits in the seed coat counted in the middle row. Our study shows that the range of morphological variation of seeds in European species of Elatine is great, both between the species and the populations. Discrimination analysis showed that all six traits significantly differentiate the populations studied (λ = 0.001, p < 0.001), and the greatest contributions were ''number of pits'', ''rectangle_a'', and ''the angle curvature''. Multidimensional scaling based on a correlation matrix of Mahalanobis distance of the six features studied revealed the greatest similarity between the three populations of E. alsinastrum, E. macropoda, and E. hexandra. Regarding interspecific differences, a Kruskal-Wallis tests showed that, in many cases, lack of statistically significant differences between species relative to the studied seed traits. If distinction of species is only based on seeds, especially if only a few seeds are evaluated, the following species pairs can be easily confused: E. alsinastrum and E. orthosperma, E. hexandra and E. macropoda, E. campylosperma and E. hydropiper, as well and E. gussonei and E. hungarica. We found no diversity in seed coat micromorphology within pits that could have potential taxonomic importance. An identification key and descriptions of species are provided on the basis of seeds traits.How to cite this article Popiela et al. (2017), Seed morphometric characteristics of European species of Elatine (Elatinaceae). PeerJ 5:e3399;

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Section: Introductionmentioning

confidence: 99%

Seed morphometric characteristics of European species of Elatine (Elatinaceae)

Popiela

Łysko

Białecka

et al. 2017

PeerJ

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“…Although recent work has augmented our knowledge of the biology of European Elatine (Popiela & Łysko, 2010; Popiela et al, 2011; Popiela et al, 2012; Molnár, Popiela & Lukács, 2013b; Popiela et al, 2013; Takács et al, 2013; Kalinka et al, 2014), there are still few studies that deal with this taxonomy of this genus in Europe (Mifsud, 2006; Uotila, 2009c; Molnár et al, 2013a). In the meantime, many new species have been described from the Americas and Australia (Mason, 1956; Schmidt-Mumm & Bernal, 1995; Albrecht, 2002; Garneau, 2006; Lægaard, 2008).…”

Section: Introductionmentioning

confidence: 99%

Molecular phylogenetics, seed morphometrics, chromosome number evolution and systematics of EuropeanElatineL. (Elatinaceae) species

Sramkó

Molnár

Tóth

et al. 2016

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The genus Elatine contains ca 25 species, all of which are small, herbaceous annuals distributed in ephemeral waters on both hemispheres. However, due to a high degree of morphological variability (as a consequence of their amphibious life-style), the taxonomy of this genus remains controversial. Thus, to fill this gap in knowledge, we present a detailed molecular phylogenetic study of this genus based on nuclear (rITS) and plastid (accD-psaI, psbJ-petA, ycf6-psbM-trnD) sequences using 27 samples from 13 species. On the basis of this phylogenetic analysis, we provide a solid phylogenetic background for the modern taxonomy of the European members of the genus. Traditionally accepted sections of this tree (i.e., Crypta and Elatinella) were found to be monophyletic; only E. borchoni—found to be a basal member of the genus—has to be excluded from the latter lineage to achieve monophyly. A number of taxonomic conclusions can also be drawn: E. hexandra, a high-ploid species, is most likely a stabilised hybrid between the main sections; E. campylosperma merits full species status based on both molecular and morphological evidence; E. gussonei is a more widespread and genetically diverse species with two main lineages; and the presence of the Asian E. ambigua in the European flora is questionable. The main lineages recovered in this analysis are also supported by a number of synapomorphic morphological characters as well as uniform chromosome counts. Based on all the evidence presented here, two new subsections within Elatinella are described: subsection Hydropipera consisting of the temperate species of the section, and subsection Macropodae including the Mediterranean species of the section.

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“…25 species), and Elatine L., occurring in the temperate zones of both hemispheres (12-25 species) (Heywood et al 2007). As emphasised by Popiela & Lysko (2010) and Popiela et al (2011), the Elatinaceae are still poorly known in respect of their taxonomy and phytogeography.…”

Section: Introductionmentioning

confidence: 99%