Topic
Melica nutans
About: Melica nutans is a research topic. Over the lifetime, 11 publications have been published within this topic receiving 165 citations.
Papers
TL;DR: Allelic richness was highest in areas central in the species' European distribution, i.e. in southern Fennoscandia, and high population densities, reducing the effects of genetic drift, as well as accumulation of variation through long-distance gene-flow from different marginal populations, is proposed to explain high allelic richness.
Abstract: The geographic distribution of allozyme variation within the Eurasian boreo-nemoreal woodland grass Melica nutans L. has been investigated together with a minor subset of other Melica species. Twenty alleles were found at nine polymorphic loci in M. nutans. Allelic richness was highest in areas central in the species' European distribution, i.e. in southern Fennoscandia. High population densities, reducing the effects of genetic drift, as well as accumulation of variation through long-distance gene-flow from different marginal populations, is proposed to explain high allelic richness in this area. Several alleles showed geographic patterns in distribution and frequency variation. However, these patterns were not congruent, e.g. some alleles appear to have migrated to northern Europe from the south-west whereas others may have spread from the east. Genetic distances between geographic regions, each consisting of 2–6 populations, were generally low between all Fennoscandian, Russian and Siberian regions, but much higher between western and continental European regions. On the population level, cluster analysis grouped populations from Siberia, Russia, coastal and lowland areas in Fennoscandia and British Cumbria into one subcluster whereas other subclusters contained mainly south-west European populations or populations from almost throughout the distribution range. A scenario with several independent glacial refugia in central Europe, south-western Siberia and possibly western Norway, and subsequent colonisation of Fennoscandia mainly from the east, but with some long-distance gene-flow from central Europe, is proposed.
46 citations
TL;DR: In the first year of the research, the average content of all chlorophyll pigments in the plants was significantly higher than in the second drier year, regardless of the site, and in the subsequent years the content of pigments was significantly differentiated by the meteorological conditions.
Abstract: The aim of the study was to identify and compare the content of chlorophyll and carotene pigments in mountain melick plants (Melica nutans L.) growing in two forest habitats in the Zielonka Forest Landscape Park in the Greater Poland region, which differed in soil properties and moisture. Leaf blades from the middle level of Melica nutans generative shoots were used as analytical material to measure the content of chlorophyll a, chlorophyll b, β-carotene and total carotenoids. The average (±SD) content of chlorophyll a in the Melica nutans plants growing in the less fertile site (Location I) amounted to 6.67 ± 0.99 mg·g−1 DM. The average content of chlorophyll b in the same plants was 2.44 ± 0.39 mg·g−1 DM. The Melica nutans plants growing in the more fertile site (Location II) had a higher content of chlorophyll a, i.e., 7.76 ± 0.96 mg·g−1 DM, and lower content of chlorophyll b, i.e., 2.36 ± 0.26 mg·g−1 DM. The plants collected from both sites had similar content of β-carotene, i.e., 0.61 ± 0.11 mg·g−1 DM Location I and 0.62 ± 0.07 mg·g−1 DM Location II. The plants growing in the less fertile site (Location I) had significantly higher total carotene content than the plants in the more fertile site (Location II). The content of pigments in the Melica nutans plants was significantly differentiated by the meteorological conditions in the subsequent years of the research. In the first year of the research, the average content of all chlorophyll pigments in the plants was significantly higher than in the second drier year, regardless of the site.
38 citations
TL;DR: This study investigates the structure of allozyme variation in material of both species from throughout southern Sweden and southern Finland, finding that Hybridization may account for the scattered occurence of some of the rare alleles in Carex digitata, but cannot explain the distribution of rare allele in Melica nutans.
Abstract: Carex digitata and Melica nutans are forest understorey herbs with wide European distributions and their northern range margins in Fennoscandia. The species have closely similar habitat requirements, occur in small populations in old forest stands on base-rich to neutral soils and have restricted dispersal abilities at the present day. This study investigates the structure of allozyme variation (12 and 8 loci, respectively) in material of both species (38 and 37 populations, respectively) from throughout southern Sweden and southern Finland. Both species show a relatively low overall genetic diversity (HT excluding monomorphic loci=0.17 and 0.18, respectively). The hierarchic structuring of allelic diversity in the species is similar, with a relatively high between-population component of diversity (GST=0.36 and 0.37, respectively). Neither of the species shows a clear intraspecific pattern of geographic differentiation. The lack of large-scale patterns of geographic differentiation is not consistent with a simple scenario of discrete and independent waves of immigration into Fennoscandia. However, particularly in M. nutans, a group of populations from a lowland belt across southwestern Finland and southern central Sweden is somewhat differentiated from populations to the north and south. A number of rare alleles in both species are widely, but patchily distributed in low frequencies. Hybridization may account for the scattered occurence of some of the rare alleles in Carex digitata, but cannot explain the distribution of rare alleles in Melica nutans.
31 citations
TL;DR: The paper presents new records for 39 vascular plant species from eight Eurasian countries, with notes concerning recognition and distinction of the species from the most similar taxa occurring in a given country.
Abstract: The paper presents new records for 39 vascular plant species from eight Eurasian countries. Aniselytron treutleri Poaceae , Hackelochloa granularis Poaceae , Melica kozlovii Poaceae and Melica nutans Poaceae are reported from China; Dichondra micrantha Convolvulaceae from Hungary; Orobanche serbica Orobanchaceae and Viscum album subsp. austriacum Santalaceae from Italy; Petrorhagia prolifera Caryophyllaceae , Puccinellia schischkinii and Stipa pulcherrima Poaceae from Kyrgyzstan; Megadenia speluncarum Brassicaceae , Phelipanche lavandulacea Orobanchaceae , Solanum physalifolium Solanaceae , Thymus lenensis Lamiaceae from Russia; Rubus phoenicolasius Rosaceae from Slovakia; Atraphaxis karataviensis Polygonaceae from Tajikistan; as well as Rubus austroslovacus and R. crispomarginatus Rosaceae in addition to Taraxacum acervatulum, T. aequilobum, T. amplum, T. ancistrolobum, T. bellicum, T. collarispinulosum, T. copidophyllum, T. corynodes, T. dentatum, T. gelertii, T. infuscatum, T. ingens, T. lucidum, T. paucilobum, T. plumbeum, T. portentosum, T. sinuatum, T. subhuelphersianum, T. telmatophilum, T. undulatiforme and T. undulatum Asteraceae from Ukraine. For each species synonyms, general distribution, habitat preferences, notes on taxonomy with remarks concerning recognition and distinction of the species from the most similar taxa occurring in a given country, as well as a list of recorded localities often far from the previously known areas are presented.
8 citations
TL;DR: In this article, the authors track local vegetation change in West Cornwall (South West England) within regional context, using historic herbarium (pre-1900) and recent vegetation records (post-1900).
7 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 2 |
| 2018 | 1 |
| 2015 | 1 |
| 2009 | 1 |
| 2002 | 3 |
| 1999 | 1 |