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Wyszukujesz frazę "morphological diversity" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Soil preferences and morphological diversity of goldenrods (Solidago L.) from south-western Poland
    Autorzy:
    Szymura, M.
    Szymura, T.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/57379.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    soil preference
    morphological diversity
    goldenrod
    Solidago
    South-Western Poland
    Polska
    plant invasion
    soil property
    invasive plant
    soil condition
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fruit and endocarp properties in relation to intra‐varietal morphological diversity of Montenegrin olive variety ‘Zutica’
    Autorzy:
    Lazović, B.
    Perović, T.
    Adakalić, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/11894575.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Montenegro
    olive tree
    Olea europaea
    plant cultivation
    Zutica cultivar
    fruit
    fruit trait
    fruit property
    endocarp
    morphological diversity
    Opis:
    ‘Žutica’ is the most widespread olive variety of Montenegro, accounting for as much as 98% of olive trees in the southern part of Montenegrin coastal area – Bar subarea. The primary purpose of variety ‘Žutica’ is olive oil production due to its small fruits and high oil content, although it is also much appreciated as a table olive, prepared in local ways as green and black. As ‘Žutica’ is an old olive variety there are some phenotypic differences recorded in the fruit properties. Here we evaluated 22 accessions from the area of Bar and Ulcinj, where this variety is very widespread (almost mono-varietal), for 34 parameters of the fruit and endocarp. Significant differences in fruit properties were observed in the accessions. Average fruit size in nine accessions was above 3.5 g and in two accessions more than 4.0 g. Number of fruits per kg ranged from 224 to 330. Cluster analysis and principal component analysis (PCA) were used to group the accessions and evaluate the morphological variability. The accessions clustered into two groups, with two off group accessions of the highest fruit weight. The results showed differences among individuals, especially for large fruit accessions that should be investigated further.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 71-81
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diversity of Nicotiana species
    Autorzy:
    Depta, Anna
    Doroszewska, Teresa
    Powiązania:
    https://bibliotekanauki.pl/articles/37242111.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    Nicotiana
    tobacco
    morphological diversity
    genetic variation
    collection
    Opis:
    The genus Nicotiana is one of the largest in the Solanaceae family and includes more than 80 species. The most well-known and widespread species of the genus Nicotiana is tobacco (Nicotiana tabacum), within which there are numerous cultivars. Tobacco is one of the most important industrial plants in Poland and worldwide. The great diversity within the genus makes it an excellent source of variation in a narrowing gene pool and can be used in breeding programmes. Studies of Nicotiana species also concern mechanisms of polyploidisation and evolution. There are also model species within the genus. However, in order to make full use of the collected germplasm resources, a detailed knowledge of the collection materials is necessary. While there are various reports in the international literature describing specific issues, the aim of this paper is to indicate the diversity of species in the genus Nicotiana as a whole on the basis of our own research and available studies. This review covers the characterisation of the genus Nicotiana in terms of origin and geographical distribution, as well as cytogenetic and molecular differences between species. An important aspect is the presentation of the morphological diversity of Nicotiana accessions and the variation in the most important tobacco alkaloids. A very important issue is the resistance of Nicotiana species to bacterial, fungal and viral diseases, which allows their use in resistance breeding.
    Źródło:
    Polish Journal of Agronomy; 2023, 52; 123-135
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological diversity of pollen from selected species of the genus Taraxacum, according to their ploidal level
    Zroznicowanie morfologiczne pylku wybranych gatunkow rodzaju Taraxacum w zaleznosci od poziomu ploidalnosci
    Autorzy:
    Marciniuk, J
    Rudzzinska-Langwald, A
    Powiązania:
    https://bibliotekanauki.pl/articles/28175.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    ploidal level
    plant
    Taraxacum
    chromosome number
    pollen morphology
    Taraxacum mendax
    morphological diversity
    Opis:
    The study of the morphology of pollen concerned eight species of the genus Taraxacum. Seven types were chosen with a different number of chromosomes belonging to the section Palustria: Taraxacum paucilobum 2n = 3x = 24, T. subdolum 2n = 3x =24, T. subpolonicum 2n =3x = 24, T. vindobonense 2n = 4x = 32, T. trilobifolium 2n = 4x = 32, T. mendax 2n = 5x = 40, T. portentosum 2n =? and one type from the section Obliqua – T. platyglossum 2n =?. Pollen from all the examined species was observed by SEM microscopy. A distinct relation exists between the morphology of pollen and the way of reproduction. Pollen of triploidal species, being compulsory apomicts, is characterized by a great variability of the size and a high percentage of deformed pollen grains. Tetraploids, being optional apomicts, produce regular pollen with a relatively even size. The regular type of pollen in pentaploidal Taraxacum mendax and in species with an unknown number of chromosomes (Taraxacum portentosum and T. platyglossum) suggests that these taxa are optional apomicts.
    Studia nad morfologią pyłku przeprowadzono dla ośmiu gatunków rodzaju Taraxacum. Wybrano siedem gatunków o zróżnicowanej liczbie chromosomów należących do sekcji Palustria: Taraxacum paucilobum 2n = 3x = 24, T. subdolum 2n = 3x =24, T. subpolonicum 2n =3x = 24, T. vindobonense 2n = 4x = 32, T. trilobifolium 2n = 4x = 32, T. mendax 2n = 5x = 40, T. portentosum 2n = ? oraz jeden gatunek z sekcji Obliqua – T. platyglossum 2n = ?. Pyłek wszystkich gatunków obserwowano w skaningowym mikroskopie elektronowym SEM. Istnieje wyraźna zależność pomiędzy morfologią pyłku a sposobem rozmnażania. Pyłek gatunków triploidalnych, będących obligatoryjnymi apomiktami charakteryzuje się dużą zmiennością wielkości oraz wysokim odsetkiem ziaren zdeformowanych. Tetraploidy będące apomiktami fakultatywnymi wytwarzają pyłek regularny, o stosunkowo wyrównanej wielkości. Regularny typ pyłku u pentaploidalnego Taraxacum mendax oraz u gatunków o nieznanej liczbie chromosomów (Taraxacum portentosum i T. platyglossum) pozwala przypuszczać, że taksony te są apomiktami fakultatywnymi.
    Źródło:
    Acta Agrobotanica; 2008, 61, 1
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Branching system of the Mexican hawthorn “Tejocote” (Crataegus spp.)
    Autorzy:
    Perez-Ortega, S.A.
    Mendez-Santiago, A.H.
    Nieto-Angel, R.
    Jankiewicz, L.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2039.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    edible hawthorn
    Mexican hawthorn
    fruit tree
    Crataegus
    canopy architecture
    branching system
    inflorescence
    morphological diversity
    Źródło:
    Journal of Horticultural Research; 2013, 21, 1
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological disparity in Plio-Pleistocene large carnivore guilds from Italian Peninsula
    Autorzy:
    Meloro, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/22061.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Carnivora
    Italian Peninsula
    Italy
    morphological diversity
    Pleistocene
    Plio-Pleistocene
    Quaternary
    geometrical morphometry
    large mammal
    mandible shape
    paleontology
    morphological variability
    taxonomy
    Opis:
    Communities of large mammals exhibit changes in morphological diversity through space and time; changes that are possibly correlated to distinct aspects of the physical environment. Here, I explore shape changes in the trophic apparatus of large carnivore guilds, comparing extant communities with Quaternary ones, from peninsular Italy. Mandibular shape is quantified through geometric morphometrics and its disparity is computed for each carnivore guild. Patterns of morphospace occupation through space and time reveal that extant carnivore guilds are negatively influenced by number of artiodactyls. Very productive ecosystems show low values of morphological disparity because species tend to occupy central regions of the morphospace rather than extreme areas. Disparity of mandibular corpus shape remains relatively stable throughout the Quaternary in the large carnivore communities of the Italian peninsula. They exhibit similar values to extant guilds because the trophic apparatus did not evolved important morphological novelties. Interestingly, carnivore guilds of the late Pliocene (3.5 Ma) and early Pleistocene (0.8 Ma) show over−dispersed or random morphospace occupation because of a depleted fauna, precluding successive structural changes. The same applies for the extant European carnivore guild as a result of recent extinctions without replacement.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Piggyback whorls: A new theoretical morphologic model reveals constructional linkages among morphological characters in ammonoids
    Autorzy:
    Ubukata, T
    Tanabe, K.
    Shigeta, Y.
    Maeda, H.
    Mapes, R.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/20269.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    morphospace
    morphology
    morphological data
    fossil animal
    constructional linkage
    ammonoid
    paleontology
    cross-sectional shape
    computer simulation
    shell growth
    morphological diversity
    Opis:
    A new theoretical morphological model is proposed for the analysis of growth, form and morphospace of ammonoid shells. In this model, the shape of a radial cross section through the shell is simulated by “piggybacking” of successive whorls. The “piggyback whorls model” is defined in terms of the enlarging rate of the perimeter and the proportion of the dorsal wall to the whorl periphery, if an isometric relationship is assumed between perimeter and area of the cross−sectioned whorl. Allometric coefficients on these growth parameters determine how compressed and evolute shells are formed. The present model successfully reproduced some correlations among purely geometric variables that have been reported in previous works and were also observed in our biometric analyses. This model yields a hypothesis of “constructional linkages” between aperture shape and coiling geometry that might provide a functional coupling between hydrostatic and hydrodynamic characters. The model may partly explain Buckman’s Law of Covariation between rib features and shell shapes.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological and genetic diversity of European cranberry (Vaccinium oxycoccos L., Ericaceae) clones in Lithuanian reserves
    Autorzy:
    Cesoniene, L.
    Daubaras, R.
    Paulauskas, A.
    Zukauskiene, J.
    Zych, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58272.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    morphological diversity
    genetic diversity
    European cranberry
    small cranberry zob.European cranberry
    bog cranberry zob.European cranberry
    swamp cranberry zob.European cranberry
    Vaccinium oxycoccos
    Ericaceae
    clone
    domestication
    genetic resource
    peat bog
    plant population
    random amplified polymorphic DNA
    Lithuania
    Opis:
    The wild-harvested fruit of Vaccinium oxycoccos (European cranberry) is used medicinally in many European and North American countries; the plant, however, is seldom cultivated. In order to optimize the collection strategy and improve the horticulturally important characters of V. oxycoccos clones, comprehensive investigations of the species are necessary. In the present study we investigated the phenological, morphological and genetic diversity of 29 clones originating from two wild populations growing in two strictly protected Lithuanian reserves, Čepkeliai and Žuvintas. During an ex situ collection at Kaunas Botanical Garden, we observed great phenological variation between the collected V. oxycoccos clones. The following morphological traits most clearly distinguished our study clones: leaf size, berry shape, berry size and fruit colour at full maturity. The genetic variation of V. oxycoccos clones from the two populations was assessed using RAPD and SSR. RAPD analysis conducted with 9 primers resulted in 146 polymorphic loci for the total sample, and SSR analysis with 5 primers revealed 29 alleles for the total sample. A greater degree of polymorphism was demonstrated for the Čepkeliai population than for the Žuvintas population. The study allowed the selection of several clones having promising morphological traits for further testing in the field.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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