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A study of the reproductive systems ...

Herring, Tara.

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A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae).

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae)./
作者:	Herring, Tara.
面頁冊數:	136 p.
附註:	Adviser: Peter Bernhardt.
Contained By:	Dissertation Abstracts International68-09B.
標題:	Agriculture, Horticulture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3280205
ISBN:	9780549207597

A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae).
Herring, Tara.

A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae). - 136 p.

Adviser: Peter Bernhardt.

Thesis (Ph.D.)--Saint Louis University, 2007.

Lady's slipper orchids of the genus Cypripedium are botanical favorites, but many species are currently threatened or endangered. Data on the demographics, pollination ecology, and reproductive mechanisms of many species are patchy, and low and fragmented population densities have hindered such research. Comprehensive knowledge of Cypripedium breeding systems, however, is vital to future conservation efforts.

ISBN: 9780549207597Subjects--Topical Terms:

1017832
Agriculture, Horticulture.

A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae).
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100 1 $a Herring, Tara. $3 1279115
245 1 2 $a A study of the reproductive systems of selected North American and Chinese Cypripedium species (Orchidaceae).
300 $a 136 p.
500 $a Adviser: Peter Bernhardt.
500 $a Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5671.
502 $a Thesis (Ph.D.)--Saint Louis University, 2007.
520 $a Lady's slipper orchids of the genus Cypripedium are botanical favorites, but many species are currently threatened or endangered. Data on the demographics, pollination ecology, and reproductive mechanisms of many species are patchy, and low and fragmented population densities have hindered such research. Comprehensive knowledge of Cypripedium breeding systems, however, is vital to future conservation efforts.
520 $a Flowering occurs only after several years of growth in Cypripedium species. While small andrenid and halictid bees have been the most oft-cited pollinators of deceptive Cypripedium flowers, bee species of other genera, as well as flies and wasps, have also been captured carrying the pollinia of Cypripedium species. The frequencies with which pollination events occur can vary widely. Initial hand-pollination experiments have shown some Cypripedium species to be self-compatible, but no comprehensive description of reproductive mechanisms exists for most Cypripedium species. This is true for two Cypripedium species native to Missouri: C. parviflorum var. pubescens (the large yellow lady's slipper) and C. reginae (the showy lady's slipper). Characterization of the breeding systems of these species, supplemented with findings from preserved specimens of three Chinese Cypripedium species, has been undertaken to broaden current understanding of insect and floral interactions in the genus.
520 $a Demographic study of C. parviflorum var. pubescens in Missouri revealed significant differences in flowering stem sizes between studied populations, indicating genetic or environmental limitations unique to individual sites. Pollination ecology studies suggested melittophily, with reliance upon small, polylectic bees, as the primary pollination syndrome of both Cypripedium species in Missouri. Fruit set in Missouri Cypripedium species indicated that roughly one-third of flowers were effectively pollinated during a flowering season, and increases in floral density were not linked to increases in fruit set. Self-compatibility was observed in both North American and Chinese Cypripedium species. Reproductive mechanisms in C. reginae specimens were unusually accelerated, a finding that merits further investigation. Ongoing studies of the reproductive systems of species like these are useful to scientists and naturalists, alike, as human activities increasingly fragment the habitats in which temperate orchid species reside.
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650 4 $a Biology, Botany. $3 1017825
650 4 $a Biology, Ecology. $3 1017726
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710 2 $a Saint Louis University. $3 1020558
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