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| Description
| - The present study describes detailed flowering phenology of Heracleum mantegazzianum and assess the effectiveness of protandry in preventing selfing in this self-compatible species, describes the timing of flowering in a heavily invaded area of Slavkovský les (Czech Republic) and estimates fruit set of a large sample of plants. Protandry is always effective only within individual flowers; within umbels as well as between umbels, anther dehiscence in some flowers can overlap with stigma receptivity in other flowers, providing an opportunity for geitonogamous selfing. An average plant at Slavkovský les produced 20,671 fruits. Of these, 44.6% were produced by the terminal umbel, 29.3% by secondary umbels on satellites, 22.6% by secondary umbels on branches and only 3.5% by tertiary umbels. Although the results of this study indicate that the fecundity of the species Heracleum mantegazzianum is often overestimated in the literature, its reproductive capacity is enormous.
- The present study describes detailed flowering phenology of Heracleum mantegazzianum and assess the effectiveness of protandry in preventing selfing in this self-compatible species, describes the timing of flowering in a heavily invaded area of Slavkovský les (Czech Republic) and estimates fruit set of a large sample of plants. Protandry is always effective only within individual flowers; within umbels as well as between umbels, anther dehiscence in some flowers can overlap with stigma receptivity in other flowers, providing an opportunity for geitonogamous selfing. An average plant at Slavkovský les produced 20,671 fruits. Of these, 44.6% were produced by the terminal umbel, 29.3% by secondary umbels on satellites, 22.6% by secondary umbels on branches and only 3.5% by tertiary umbels. Although the results of this study indicate that the fecundity of the species Heracleum mantegazzianum is often overestimated in the literature, its reproductive capacity is enormous. (en)
- Práce přináší podrobný popis fenologie kvetení a zkoumá, nakolik protandrie účinně zabraňuje samoopylení tohoto self-kompatibilního druhu. Dále popisuje načasování a průběh kvetení v silně invadované oblasti Slavkovského lesa a poskytuje odhad plodnosti založený na velkém vzorku rostlin z řady lokalit. Protandrie je plně účinná pouze na úrovni květu; uvnitř okolíku i mezi okolíky se může fáze uvolňování pylu překrývat s receptivitou blizen jiných květů a poskytovat tak příležitost pro geitonogamní samoopylení. Průměrná rostlina vytvořila 20 671 plodů (n = 100), z toho 44,6% v terminálním okolíku, 29,3% v sekundárních okolících na satelitech, 22,6% v sekundárních okolících na větvích a pouze 3,5% v terciálních okolících. Ačkoliv výsledky ukazují, že plodnost druhu H. mantegazzianum byla v literatuře často přeceňována, jeho reprodukční kapacita je enormní. (cs)
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| Title
| - Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum
- Fenologie kvetení a plodnost invazního druhu Heracleum mantegazzianum (cs)
- Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum (en)
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| skos:prefLabel
| - Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum
- Fenologie kvetení a plodnost invazního druhu Heracleum mantegazzianum (cs)
- Flowering phenology and reproductive effort of the invasive alien plant Heracleum mantegazzianum (en)
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| skos:notation
| - RIV/67985939:_____/06:00053214!RIV07-MSM-67985939
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA206/05/0323), P(LC06073), Z(AV0Z60050516)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/67985939:_____/06:00053214
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - invasions; phenology; fecundity (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Pergl, Jan
- Pyšek, Petr
- Perglová, Irena
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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