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Which food-mimic floral traits and environmental factors influence fecundity in a rare orchid, Calanthe yaoshanensis?
Ren, Zong-Xin1,2; Wang, Hong1,2; Bernhardt, Peter3; Camilo, Gerardo3; Li, De-Zhu1,2; Wang,H (reprint author),Chinese Acad Sci,Key Lab Plant Biodivers & Biogeog East Asia,Kunming 650201,Yunnan,Peoples R China.; wanghong@mail.kib.ac.cn
2014-11-01
Source PublicationBOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN0024-4074
Volume176Issue:3Pages:421-433
Contribution Rank第一
Abstract

Orchid species that are food mimics produce fewer fruits than species offering rewards, but few studies have shown the impact of environmental factors (e.g. anthropogenic activity, frost and herbivores) on their reproductive success over several seasons. In this study, we focused on the sole population of the endangered Calanthe yaoshanensis as it secretes no nectar. We investigated its floral biology, fruit set rates and prevailing environmental factors over three seasons (2008-2010). Mechanical self-pollination did not occur in C.yaoshanensis, but hand-selfed and crossed flowers produced equal numbers of fruit. However, seed viability and embryo size were significantly higher in cross-pollinated fruits maximizing embryonic fitness. Large hoverflies (Syrphidae) and Bombus patagiatus (gynes) were the only pollinarium vectors, but they often failed to disperse pollinaria. We interpret the temporary retention of the anther cap over the pollinarium as an adaptation lowering self-pollination. Insect-mediated rates of pollinarium removal were always higher than rates of pollinia deposition on stigmas. Over 3 years, natural rates of pollinarium removal differed significantly, whereas natural rates of fruit set were not significantly different (<22%). Climate, herbivory and anthropogenic collections also inhibited some fruit set and maturation. Both biotic and abiotic factors appear to lower the fecundity of this endangered population.(c) 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 421-433.

KeywordConservation Embryo Fly Pollination Food Deception Fruit Set Orchidaceae Pollinarium Removal Pollinators Pollinia Deposition
Subject AreaPlant Sciences
DOI10.1111/boj.12213
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000343923400010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/18511
Collection中国西南野生生物种质资源库
Corresponding AuthorWang,H (reprint author),Chinese Acad Sci,Key Lab Plant Biodivers & Biogeog East Asia,Kunming 650201,Yunnan,Peoples R China.; wanghong@mail.kib.ac.cn
Affiliation1.Chinese Acad Sci, Key Lab Plant Biodivers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Plant Germplasm & Genom Ctr, Kunming 650201, Yunnan, Peoples R China
3.St Louis Univ, Dept Biol, St Louis, MO 63103 USA
Recommended Citation
GB/T 7714
Ren, Zong-Xin,Wang, Hong,Bernhardt, Peter,et al. Which food-mimic floral traits and environmental factors influence fecundity in a rare orchid, Calanthe yaoshanensis?[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2014,176(3):421-433.
APA Ren, Zong-Xin.,Wang, Hong.,Bernhardt, Peter.,Camilo, Gerardo.,Li, De-Zhu.,...&wanghong@mail.kib.ac.cn.(2014).Which food-mimic floral traits and environmental factors influence fecundity in a rare orchid, Calanthe yaoshanensis?.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,176(3),421-433.
MLA Ren, Zong-Xin,et al."Which food-mimic floral traits and environmental factors influence fecundity in a rare orchid, Calanthe yaoshanensis?".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 176.3(2014):421-433.
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