Manipulation of trait expression and pollination regime reveals the adaptive significance of spur length
Trunschke, Judith1,2; Sletvold, Nina1; Agren, Jon1
Corresponding AuthorAgren, Jon(jon.agren@ebc.uu.se)
2020-01-24
Source PublicationEVOLUTION
ISSN0014-3820
Pages13
AbstractUnderstanding the mechanisms of adaptive population differentiation requires that both the functional and adaptive significance of divergent traits are characterized in contrasting environments. Here, we (a) determined the effects of floral spur length on pollen removal and receipt using plants with artificial spurs representing the species-wide variation in length, and (b) quantified pollinator-mediated selection on spur length and three traits contributing to floral display in two populations each of the short-spurred and the long-spurred ecotype of the orchid Platanthera bifolia. Both pollen receipt and removal reached a maximum at 28-29 mm long spurs in a short-spurred population visited by short-tongued moths. In contrast, pollen receipt increased linearly across the tested range (4-52 mm) and pollen removal was unrelated to spur length in a long-spurred population predominantly visited by a long-tongued moth. The experimentally documented effects on pollen transfer were not reflected in pollinator-mediated selection through female fitness or pollen removal indicating that the natural within-population variation in spur length was insufficient to result in detectable variation in pollen limitation. Our study illustrates how combining trait manipulation with analysis of causes and strength of phenotypic selection can illuminate the functional and adaptive significance of trait expression when trait variation is limited.
KeywordFlower morphology orchid Platanthera bifolia pollinator-mediated selection population differentiation trait manipulation
DOI10.1111/evo.13927
Indexed BySCI ; SCI
Language英语
WOS IDWOS:000508983200001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/70530
Collection中国科学院东亚植物多样性与生物地理学重点实验室
Corresponding AuthorAgren, Jon
Affiliation1.Uppsala Univ, EBC, Dept Ecol & Genet, Plant Ecol & Evolut, SE-75236 Uppsala, Sweden
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Trunschke, Judith,Sletvold, Nina,Agren, Jon. Manipulation of trait expression and pollination regime reveals the adaptive significance of spur length[J]. EVOLUTION,2020:13.
APA Trunschke, Judith,Sletvold, Nina,&Agren, Jon.(2020).Manipulation of trait expression and pollination regime reveals the adaptive significance of spur length.EVOLUTION,13.
MLA Trunschke, Judith,et al."Manipulation of trait expression and pollination regime reveals the adaptive significance of spur length".EVOLUTION (2020):13.
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