Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "rare species" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 87
Tytuł:
Species of anamorphic fungi rare and new for Poland
Rzadkie i nowe dla Polski gatunki grzybów anamorficznych
Autorzy:
Adamska, I.
Powiązania:
https://bibliotekanauki.pl/articles/67767.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
rare species
new species
fungi
anamorphic fungi
Morinia
Seimatosporium
Septoria
parasitic fungi
Slowinski National Park
Polska
Opis:
Morinia pestalozzioides, Seimatosporium hypericinum, Septoria artemisiae, S. artemisiaemaritimae, S. achilleicolaand S. symphyti, fungi not recorded in Poland before, are described and illustrated. The species were found during studies on the occurrence of parasitic fungi conducted in selected sites in the Słowiński National Park and in the Western Pomerania between 2001 and 2004.
W latach 2001-2004 w wybranych stanowiskach Słowińskiego Parku Narodowego i Pomorza Zachodniego prowadzono badania nad występowaniem grzybów pasożytniczych. W trakcie badań znaleziono Morinia pestalozzioides, Seimatosporium hypericinum, Septoria artemisiae, S. artemisiae-maritimae, S. achilleicolai S. symphyti, gatunki nowe dla Polski. W artykule opisano i zilustrowano znalezione gatunki grzybów.
Źródło:
Acta Mycologica; 2007, 42, 1
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Species under special consideration in the Lower Slupia valley [Western Pomeranian Region]
Gatunki szczegolnej troski w dolinie Dolnej Slupi [Pomorze Zachodnie]
Autorzy:
Antkowiak, W.
Prajs, B.
Sobisz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/878534.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
locality
Polska
rare species
plant species
plant distribution
vulnerable species
botany
vascular plant
Pomeranian region
Lower Slupia Valley Landscape
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2006, 10
1896-1908
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative evaluation of the antioxidant potential of Hericium erinaceus, Hericium americanum and Hericium coralloides
Autorzy:
Atila, F.
Powiązania:
https://bibliotekanauki.pl/articles/12692670.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
mushroom
Hericium erinaceus
Hericium americanum
Hericium coralloides
edible mushroom
rare species
endangered species
antioxidant potential
comparative evaluation
Opis:
The aim of this work was to determine the total phenolic content (TPC) and the antioxidant activity of methanol extracts of Hericium erinaceus, Hericium americanum and Hericium coralloides, including free radical scavenging method (DPPH), ferric reducing antioxidant power (FRAP) and radical cation scavenging method (ABTS). Hericium spp exhibited moderate to high antioxidant activity. The highest TPC (3.27 ±0.01 mg GAE g–1) and antioxidant activity values (17.0 ±0.68 mmol TE g–1 in FRAP; EC 50 = 4.12 ±0.12 mg mL –1 in DPPH •; EC 50= 2.83 ± 0.10 mg mL–1in ABTS•+ ) were found for methanol extracts of H. coralloides. The TPC and antioxidant activity of H. erinaceus isolates varied from strain to strain. H. americanum possessed considerably lower total phenolic content (2.31 ±0.01 mg GAE g–1) and antioxidant activity (10.5 ±0.59 mmol TE g–1 in FRAP; EC 50 = 7.82 ±0.09 mg mL –1 in DPPH•; EC 50 = 6.36 ± 0.12 mg mL–1 in ABTS •+) than H. coralloides and H. erinaceus. A high correlation was determined between TPC and ABTS •+( r2= 0.855), DPPH•(r2= 0.969) and FRAP (r2 = 0.942). According to results obtained in the present study, Hericium spp., especially H. coralloides and some of H. erinaceus isolates, might be promising natural source of antioxidants for food and pharmaceutical industry.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 97-106
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rare and protected species in the drainage ditches and adjacent phytocoenoses in the Polesie National Park
Gatunki rzadkie i chronione w rowach melioracyjnych i w fitocenozach z nimi sąsiadujących na terenie Poleskiego Parku Narodowego
Autorzy:
Banach, B.
Powiązania:
https://bibliotekanauki.pl/articles/27653.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
rare species
protected species
plant species
drainage ditch
phytocoenosis
Polesie National Park
vascular flora
flora
Opis:
This paper presents the results of a fl oristic study conducted in the years 2003 – 2005 within the area of the Polesie National Park and its protective zone. Floristic inventories were carried out in twelve 100-metre-long sections of the drainage ditches and adjacent phytocoenoses and based on them offi ce analyses of the fl ora were performed. The aim of the study was to determine the share of species with special natural values in the drainage ditches, taking into account the occurrence of legally protected, rare and endangered taxa at the regional level, in Poland and in Europe. The share of these species was also compared with the richness of special concern plants noted in the phytocoenoses adjacent to the investigated ditches. Based on the fl oristic composition, an analysis was made of the occurrence of taxa whose number of stands shows a declining trend compared to the Polish fl ora. The number of vascular plant species found in the ditches and in their vicinity was similar, but the low values of the similarity index suggest differences in the species composition of these habitats, which results in greater species diversity. The presence of special concern plants in the drainage ditches suggests that they are valuable habitats for the Polesie National Park. They create niches for rare, protected and endangered species.
W pracy przedstawiono wyniki badań fl orystycznych prowadzonych w latach 2003–2005 na obszarze Poleskiego Parku Narodowego i jego otuliny. Na dwunastu 100-metrowych odcinkach rowów melioracyjnych oraz w fi tocenozach sąsiadujących wykonano spisy fl orystyczne, na podstawie których dokonano analiz kameralnych fl ory. Celem badań było określenie udziału gatunków o szczególnych wartościach przyrodniczych w rowach melioracyjnych, z uwzględnieniem występowania taksonów prawnie chronionych, rzadkich i zagrożonych w skali regionu, Polski i Europy. Porównano także udział tych gatunków z bogactwem roślin „szczególnej troski” notowanych w fi tocenozach sąsiadujących z badanymi rowami. Na podstawie składu fl orystycznego przeanalizowano występowanie taksonów, których liczba stanowisk na tle fl ory Polski wykazuje tendencje spadkowe. Liczba gatunków roślin naczyniowych stwierdzona w rowach i ich sąsiedztwie była zbliżona, jednak niskie wartości współczynnika podobieństwa sugerują rozbieżności w składzie gatunkowym tych siedlisk, co wpływa na ich większą różnorodność gatunkową. Obecność w rowach melioracyjnych gatunków „specjalnej troski” wskazuje, że są one siedliskami cennymi dla PPN. Stwarzają one nisze dla gatunków rzadkich, chronionych i zagrożonych.
Źródło:
Acta Agrobotanica; 2008, 61, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Goździk kosmaty Diathus armeria L. na Pogórzu Cieszyńskim (południowa Polska)
Deptford pink Diathus armeria L. in the Cieszyn Foothills (southern Poland)
Autorzy:
Beczała, Tomasz
Chmura, Damian
Powiązania:
https://bibliotekanauki.pl/articles/36078220.pdf
Data publikacji:
2024-06
Wydawca:
Uniwersytet Bielsko-Bialski
Tematy:
gatunek chroniony
zasoby populacji
stanowiska rzadkich gatunków roślin
protected species
abundance of population
localities of rare plant species
Opis:
Deptford pink Dianthus armeria L. is a representative of Caryophyllaceae family. It is plant species that is strictly protected since 2014. In the local Red List for the Silesian Province it was considered an endangered species. During 2023-2024 fieldwork was done that aimed to update the list of the localities of this species in the Cieszyn Foothills region. The locality was marked on the map using methodological assumptions of Atlas of Distribution of Vascular Plants in Poland. The density of population was counted or estimated. As a result of the field studies in the study area 9 localities (a total of 17 local populations) of Dianthus armeria were found in grassland, meadow, fringe and ruderal communities. Totally 8 localities were new to this area. Only localities from Tuł Mt has been known earlier. There were also the highest abundance of population, estimated at 600-700 individuals but population contain several small populations that amounting from tens to several hundreds of plants. Two populations are in Cisownica village and they occupy slopes of two local mountains: Kopieniec Mt (475 m a.s.l.) and Malcowa Mt (510 m a.s.l.). In Cieszyn population grows close to the nature reserve “Kopce”, and ecological use are “Łąki na kopcach”. In Leszna Górna village populations occupy xerothermic grasslands. The other situation is Górki Wielkie where the species grows in ruderal habitats: levees along Brennica river and in the vicinity of market. The other human-made habitats which were grown by Dianthus armeria were found in Puńców. These ones were abandoned quarry of dolomites and the vicinity of sports field but close to the fring of oak-hornbeam forest. In general, the population in the Cieszyn Foothills, size ranged from a few individuals to approximately several hundred. The lack of accurate data from previous years does not allow to assess the dynamics of the distribution and abundance of this species. Based on the general trends of Dianthus armeria in Poland, the population status appears to be satisfactory.
Źródło:
Polish Journal of Materials and Environmental Engineering; 2024, 7(27); 56-62
2720-1252
Pojawia się w:
Polish Journal of Materials and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of fruits and seeds of Sorbus torminalis in Poland
Autorzy:
Bednorz, L
Powiązania:
https://bibliotekanauki.pl/articles/41347.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
tree
Rosaceae
plant variation
biometry
statistical analysis
rare species
tree species
Sorbus torminalis
fruit
seed
morphological variability
Polska
Opis:
The results of the study on morphological variation of fruits and seeds of a rare forest tree species Sorbus torminalis (L.) Crantz in Poland are presented and discussed. The ripe fruits were collected from 13 localities widespread within the range of the species. Fruits and seeds were measured according to 13 morphological traits. The biometric data were subjected to multivariate statistical analysis in attempt to define intra and inter populational variation. Most of the fruit and seed traits are significantly correlated and are characterized by moderate level of variation. Traits describing size and shape are higher variable in seeds than in fruits. High level of variation within examined populations was ascertained. The average among population component of variation was only 23.99%. Though the differences between sampled populations are significant, almost no geographical pattern of this differentiation was detected. The biological significance of some of fruit and seed features is discussed in the paper. Examining the collected material a single fruits with 5–6 seeds were found what suggests the presence of three carpels in gynoeceum, a number not previously reported in the species.
Źródło:
Dendrobiology; 2007, 57; 3-14
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Polish records of Myxomycetes rare in Europe
Autorzy:
Bochynek, A.
Powiązania:
https://bibliotekanauki.pl/articles/56567.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
first record
Polska
Myxomycetes
rare species
taxonomy
distribution
Europe
Opis:
Seven species of Myxomycetes are reported from Poland for the first time. These are Arcyria virescens, Cribraria costata, C. elegans, C. languescens, C. mirabilis, C. pertenuis and Trichia flavicoma. They have very few localities in Europe and Cribraria pertenuis is known only from two sites worldwide. The species are described and illustrated with microphotographs, including first published micrographs of C. pertenuis. Localities are given and the taxonomy and ecology of each species are discussed.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of hypogeous fungi in the Carpathian-Pannonian region in the past centuries
Autorzy:
Bratek, Z.
Merenyi, Z.
Varga, T.
Powiązania:
https://bibliotekanauki.pl/articles/67832.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
hypogeous fungi
fungi
Carpathian-Pannonian region
fungi list
distribution
new species
rare species
Hungary
Opis:
The exploration of hypogeous fungi in the Carpathian-Pannonian region speeded up in the past decades, owing to the widespread of truffle hunting with dogs. As a result, not only several new species were found in the region, but our view of the frequency of truffles also changed fundamentally. It became evident that Tuber aestivum, T. brumale, T. macrosporum, T. magnatum, T. mesentericum and Mattirolomyces terfezioides can be collected in commercial quantity. Among the dog preferred hypogeous fungi (DPH) several species, earlier believed to be rare like Octaviania asterosperma and Stephensia bombycina, also occurred. The taxonomic alterations and revisions brought about changes in the list of hypogeous fungi, and further changes are expected from molecular taxonomy research on a number of genera at present.
Źródło:
Acta Mycologica; 2013, 48, 1
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New records of Chara connivens P. Salzmann ex A. Braun 1835 - an extremely rare and protected species in Polish brackish waters
Autorzy:
Brzeska, P.
Wozniczka, A.
Pelechaty, M.
Blindow, I.
Powiązania:
https://bibliotekanauki.pl/articles/56909.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
new record
Chara connivens
extremely rare species
rare species
protected species
Polska
brackish water
Vistula Lagoon
Szczecin Lagoon
baltic Sea
Opis:
The stonewort Chara connivens was rediscovered in the Vistula Lagoon in 2011, almost 35 years after its last record. In 2012, the species was recorded for the first time in the Szczecin Lagoon. Chara connivens occurred at shallow (0.5–1.2 m) sandy-muddy and muddy bottoms of small embayments. In the Vistula Lagoon, the stonewort was represented by single small specimens, while in the Szczecin Lagoon, it formed dense and extensive patches.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany flory roślin naczyniowych runa leśnego w latach 1959-2016 na stałej powierzchni badawczej w oddziale 319 Białowieskiego Parku Narodowego
Changes of herb layer vegetation during the period 1959-2016 on the permanent study plot in the compartment 319 of Bialowieza National Park
Autorzy:
Brzeziecki, B.
Ciurzycki, W.
Keczyński, A.
Powiązania:
https://bibliotekanauki.pl/articles/985863.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Bialowieski Park Narodowy
badania florystyczne
stale powierzchnie badawcze
runo lesne
flora
gatunki rzadkie
gatunki chronione
zmiany skladu gatunkowego
lata 1959-2016
biodiversity loss
ground vegetation
long−term research
protected plant species
rare plant species
red
list species
strict protection
Opis:
Changes in the herbaceous layer (vascular plants), taking place between 1959 and 2016 on the permanent study plot in the compartment 319 of the Strict Reserve in the Białowieża National Park are presented. Zaręba [1972] presented phytosociological research carried out in 1959 on the 1.2 ha plot. The author established 10 relevés (size between 100 and 400 m2), in which in total 91 different species of vascular plants were noted. In 2016, the similar study was conducted, using slightly modified methods (the inventory of plants involved the total area of the study plot). The comparison of data recorded during both investigations revealed that the total number of plant species declined from the initial 91 to current 83. During the ca. 60−year long period, 43 plant species disappeared completely and were replaced by 35 new species. In the declining group, almost the half (20) were species important from the point of view of nature conservation, including four Red List species (Arnica montana, Goodyera repens, Lathyrus laevigatus, Trolius europaeus), 10 plant species protected by law, and several other precious species related to rare and declining woodland community types. The obtained results confirm the findings of other authors describing unfavourable changes in the flora of the Białowieża Forest during the past several tens of years. The floristic richness is an important part of the overall biodiversity of Białowieża Forest. It appears that strict protection does not secure the maintenance of this key component. Thus, an attempt to preserve diverse values of Białowieża Forest on a sustainable basis should, first of all, look for a proper balance between strict and active protection. The later can (and should) be integrated within the multifunctional forest management, conducted on the prevailing area of the Białowieża Forest.
Źródło:
Sylwan; 2018, 162, 12; 980-988
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ophiocordyceps stylophora (Ophiocordycipitaceae) in Poland: new localities and host species
Autorzy:
Chachula, P.
Voncina, G.
Stanczak, P.
Powiązania:
https://bibliotekanauki.pl/articles/2197190.pdf
Data publikacji:
2019-11-18
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Ophiocordyceps stylophora
rare species
Tenebrionidae beetle
Hypocreales
Cordyceps
entomopathogenic fungi
fungal ecology
new locality
Polska
Opis:
Ophiocordyceps stylophora, a rare fungus species in Europe, was first recorded in one locality in Poland in 2011. This paper concerns 33 specimens found between 2011 and 2015 in 23 new localities in five areas. Amongst the described specimens, one was found on the Tenebrionidae beetle, and others grew on Elateridae larvae. For the first time, Tenebrionidae larvae have been observed as hosts of O. stylophora. Five new positions have been located in the southern part of Poland in the area of Oszast and Reberce nature reserves, Babia Góra and Roztocze national parks, and one has been found in the northern part of Poland, in the Elbląg Upland Landscape Park.
Źródło:
Acta Mycologica; 2019, 54, 2; 1125
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New localities of rare species of the genus Microbotryum
Nowe stanowiska rzadkich gatunków grzybów z rodzaju Microbotryum
Autorzy:
Chlebicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/67127.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
new locality
rare species
Microbotryum
locality
occurrence
protected area
ecology
fungi
smut fungi
Pucciniomycotina
Opis:
Microbotryum bistortum, M. dianthorum, M. superbum and M. langerheimii, rare species of smut fungi are reported from new localities in Poland, mostly in protected areas. Dianthus superbus subsp. superbus is a new host for M. superbum observed. Taxonomical status of M. carthusianorum and M. superbum is discussed in the paper.
Grzyby z rodzaju Microbotryum Lév. są obecnie zaliczane do podgromady Pucciniomycotina, gdzie wchodzą w skład rzędu Microbotryales R. Bauer & Oberw. W Polsce dotychczas odnotowano 28 gatunków z tego rodzaju. Są to wyspecjalizowane patogeny roślin atakujące głównie pylniki, rzadziej słupki, nasiona i liście. Zachodzące w ostatnich latach zmiany w taksonomii wymagają dostosowania nazewnictwa i przejrzenia dotychczas zebranych materiałów. Rozmieszczenie tych grzybów w Polsce jest słabo poznane. Nieliczne stanowiska wielu gatunków tych grzybów były podawane z niektórych parków narodowych i rezerwatów przyrody. Również zakres żywicieli jest w Polsce niedostatecznie poznany. W niniejszej notatce zostały przedstawione informacje o czterech gatunkach tych grzybów: Microbotryum bistortarum, M. dianthorum, M. superbum i M. lagerheimii.
Źródło:
Acta Mycologica; 2010, 45, 2
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Actual State and Changes of Flora and Vegetation in the Broczówka Steppe Reserve
Autorzy:
Cwener, Anna
Nowak, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/764985.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
steppe reserve
rare and endangered species
succession
Opis:
This paper presents floristic characterization of xerothermic plant associations and analysis of changes of flora within Broczówka steppe reserve. The floristic research was carried out in 2004-2009. Numerous species that were noted here almost 30 years ago were not found in the present study, the size of other populations decreased. Nevertheless, many plant species occurring in the reserve are rare, endangered or protected. Six major plant associations, impoverished form of two ones and one plant community are distinguished in the whole area of the reserve. Occurrence of two plant associations was not confirmed.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2011, 7; 163-176
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vascular flora of the "Dębowiec" Nature Reserve in the Malopolska Upland (Central Poland)
Autorzy:
Czarna, A.
Gorski, P.
Powiązania:
https://bibliotekanauki.pl/articles/878364.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
vascular flora
rare species
mountain species
Debowiec Nature Reserve
Malopolska Upland
Central Poland
Opis:
The paper presents the actual vascular flora of the “Dębowiec” nature reserve identifi ed in 2004-2009 and supplemented on the basis of literature data. The vascular flora consists of 306 vascular species, including the following mountain species: Abies alba, Acer pseudoplatanus, Anthriscus nitida, Chaerophyllum hirsutum, Huperzia selago, Polygonatum vericillatum, Ribes alpinum, Sambucus racemosa and Valeriana sambucifolia. It must be stressed that there are 29 rare species in the regional scale of Central Poland.
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2013, 17
1896-1908
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floral biology of Senecio macrophyllus M. Bieb. (Asteraceae), a rare Central European steppe plant
Autorzy:
Czarnecka, B.
Denisow, B.
Powiązania:
https://bibliotekanauki.pl/articles/57873.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
floral biology
Senecio macrophyllus
Compositae
rare species
insect visitation
female phase
male phase
pollen production
pollen viability
Central Europe
steppe plant
Opis:
Knowledge of the flowering phase and plant pollination ecology is very important for understanding the life history of long-lived perennials. In the case of rare species, the information may have implications for conservation practices. Our studies on flower morphology and blooming biology of the vulnerable plant Senecio macrophyllus M. BIEB. were conducted in situ (flowering, activity of insect visitors) in the largest population in SE Poland and in laboratory (light and scanning electron microscopy). The disc florets open diurnally with most intensive anthesis in the early afternoon and attract insect visitors with nectar and pollen. In highly protandrous disc florets, pollen viability decreases in time, whereas stigma receptivity increases. The upper part of the pistil forms a brush-like pollen presenter, covered with unicellular trichomes with chromoplasts. Pollen presentation lasts 4–11 hours per floret, and 8 days in a single head, the main function of which is to extend the availability of male gamets for reproduction. The number of florets per head, the head size, and the number of pollen grains produced per anther, and the pollen grain viability differed significantly between microsites. The finding indicates that, apart from the biotic factors, abiotic conditions may considerably influence generative reproduction of the species. In the study area, the principal visitors of S. macrophyllus flowers were Hymenoptera, with predominance of Apis mellifera (53.4% of visits). The remarkable share of butterflies (13.9%) recognized as the long-distance moving insects may improve the genetic variability of individuals within a fragmented population. A more detailed study is necessary to explain the role of insect visitors in effective pollination and in gene transfer between patches. The assessment of optimal conditions for the generative reproduction is fundamental for the in situ conservation of this rare species.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 87

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies