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Wyszukujesz frazę "autogamy" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
The ability of spontaneous autogamy in four orchid species: Cephalanthera rubra, Neottia ovata, Gymnadenia conopsea, and Platanthera bifolia
Autorzy:
Tałałaj, Izabela
Ostrowiecka, Beata
Włostowska, Ewa
Rutkowska, Agnieszka
Brzosko, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/952112.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
allogamous species
facultative autogamy
fruit set
hand pollination
seed development
self-compatibility
Opis:
The breeding system in Orchidaceae generates many questions about the selfing potential of its representatives. We investigated the ability of spontaneous autogamy of four orchid species: Cephalanthera rubra and Neottia ovata of the Neottieae tribe and Gymnadenia conopsea and Platanthera bifolia of the Orchideae tribe. These species represent diverse specializations of the gynostemium architecture. The self-compatibility and properties of autogamous seeds were determined in a bagging experiment and seed development analysis. After induced autogamy, a high level of fruiting (80-100%) was noted in all of the four study species. C. rubra, N. ovata, and G. conopsea are completely self-compatible, and P. bifolia is suggested to be partially self-compatible. If autogamy occurred, inbreeding depression and resource limitation on seed development appeared only in the two Orchideae species. Independent of flower specialization, both Neottieae species and P. bifolia were completely allogamous, whereas G. conopsea could be facultatively autogamous.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2017, 59, 2
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Notes on the self-pollination in Dendrobium biflorum (Orchidales, Dendrobiinae)
Autorzy:
Kowalkowska, A.K.
Margonska, H.B.
Powiązania:
https://bibliotekanauki.pl/articles/57446.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
self-pollination
Dendrobium biflorum
Orchidales
Dendrobiinae
gynostemium
micromorphology
gynostemium structure
autogamy
Orchidaceae
Opis:
The conditions favouring self-pollination are determined for a species of Dendrobium Sw. A survey of gynostemium micromorphology in collected flowers of Dendrobium biflorum revealed two stages of a unique form of autogamy: on germination of pollen tetrads, pollen tubes reached the stigmatic region without the pollen being displaced from the anther locules. This is the first time for this type of autogamy to be reported in Dendrobium biflorum. Pollen grains germinated directly from the locules, bypassing the stigma or falling or sliding down onto the stigmatic surface. The pollen tubes were long and reached the stylar canal. On The Society Islands, differences in exposure of the habitats to weather conditions and altitude gradients influence both composition and form of the vegetation, as well as the occurrence of pollinators. The form of autogamy described here may be the usual method of pollination found on The Society Islands (and even the whole of French Polynesia), where suitable pollinators are absent and/or growth conditions stressful.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The pollination of Epipactis Zinn, 1757 (Orchidaceae) species in Central Europe – the significance of chemical attractants, floral morphology and concomitant insects
Autorzy:
Jakubska-Busse, A.
Kadej, M.
Powiązania:
https://bibliotekanauki.pl/articles/58676.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
pollination
Orchidaceae
Central Europe
significance
chemical attractant
flora
morphology
concomitant insect
Epipactis
autogamy
geitonogamy
pollinator
orchid
nectar composition
Epipactis atrorubens
Epipactis purpurata
Epipactis palustris
Opis:
A series of studies on pollination biology of the Epipactis atrorubens (Hoffm.) Besser, E. purpurata Sm., and E. palustris (L.) Crantz populations was conducted in Poland, Lithuania and Czech Republic between 2003 and 2010. The research focused on pollinators and visitors to aforementioned orchid species as well as on the chemical analysis of orchids’ nectar which was done using the GC/MS method. It was found that: 1) the type of pollinators depends on the orchid population size and the surrounding environment, where the temperature and amount of precipitation during the vegetative season are the most vital factors; 2) pollinators and visitors to the examined orchids might differ in successive growing seasons; 3) the studied Epipactis species differ in the chemical composition of their nectar and its scent, which can influence their pollination biology; 4) the tendency to autogamy observed in E. purpurata might be due to lack of pollinators in its habitats.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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