Reproduction and Pollination of the Endangered Dwarf Bear-PoppyArctomecon humilis(Papaveraceae) across a Quarter Century: Unraveling of a Pollination Web?
| Autor: | Vincent J. Tepedino, Terry L. Griswold, John F. Mull, Gerald Bryant |
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| Rok vydání: | 2014 |
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| Zdroj: | Western North American Naturalist. 74:311-324 |
| ISSN: | 1944-8341 1527-0904 |
| DOI: | 10.3398/064.074.0306 |
| Popis: | — Arctomecon humilis, a rare gypsophile of the extreme northeastern Mojave Desert, is restricted to a few isolated populations in Washington County, Utah, USA. At several times in the past quarter century, we have studied the breeding system and reproductive success of this endangered species, recorded its pollinators, and tested the feasibility of human-assisted gene flow by performing reciprocal crosses between 2 isolated “populations” approximately 4 km apart. Arctomecon humilis possessed a mixed breeding system in the population studied (Beehive Dome in 1988); some plants exhibited self-compatibility but produced significantly fewer fruit/flowers and seeds/fruit for geitonogamous self-pollinations than for cross-pollinations. Few fruits and seeds were produced in the absence of pollinators. The results of cross-pollination treatments did not differ from unassisted open-pollinations (controls), suggesting that pollinators were not limiting reproductive success. Our more recent results (2012) s... |
| Databáze: | OpenAIRE |
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