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Pollen donor identity affects timing of stigma receptivity in Collinsia heterophylla (Plantaginaceae): a sexual conflict during pollen competition?

Lankinen, Åsa LU and Kiboi, Samuel LU (2007) In American Naturalist 170. p.854-863
Abstract
Theory predicts that, during pollen competition, selection may favor a pollen trait that increases donor competitive ability at the expense of the female reproductive function. One such pollen trait could be manipulation of the onset of stigma receptivity. We evaluated the potential occurrence of this kind of sexual conflict by testing female control of the timing of stigma receptivity in the self-compatible annual Collinsia heterophylla. By performing one-donor crosses in the greenhouse, we found that differences in both recipients and pollen donors influenced when stigmas became receptive. Because we did not detect an interaction effect, our result suggests that some donors were consistently better than others at germinating pollen and... (More)
Theory predicts that, during pollen competition, selection may favor a pollen trait that increases donor competitive ability at the expense of the female reproductive function. One such pollen trait could be manipulation of the onset of stigma receptivity. We evaluated the potential occurrence of this kind of sexual conflict by testing female control of the timing of stigma receptivity in the self-compatible annual Collinsia heterophylla. By performing one-donor crosses in the greenhouse, we found that differences in both recipients and pollen donors influenced when stigmas became receptive. Because we did not detect an interaction effect, our result suggests that some donors were consistently better than others at germinating pollen and siring seeds earlier. Unexpectedly, self-pollen was able to fertilize seeds earlier during floral development compared with outcross pollen. These results suggest that female control on timing of stigma receptivity is not complete in this species. In addition, fertilizations that occurred early during floral development resulted in fewer seeds than later fertilizations, possibly indicating a cost of lost control over the onset of receptivity. The ability of pollen donors to influence the timing of stigma receptivity might reflect a conflict between the sexual functions in C. heterophylla. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Plantago: physiology, Flowers: physiology
in
American Naturalist
volume
170
pages
854 - 863
publisher
University of Chicago Press
external identifiers
  • wos:000250832000008
  • scopus:36749002180
ISSN
0003-0147
DOI
10.1086/522839
language
English
LU publication?
yes
id
0b2c0fed-394e-4a26-bc26-7a3f1aa5b999 (old id 698573)
date added to LUP
2008-02-19 14:07:32
date last changed
2017-10-22 04:52:20
@article{0b2c0fed-394e-4a26-bc26-7a3f1aa5b999,
  abstract     = {Theory predicts that, during pollen competition, selection may favor a pollen trait that increases donor competitive ability at the expense of the female reproductive function. One such pollen trait could be manipulation of the onset of stigma receptivity. We evaluated the potential occurrence of this kind of sexual conflict by testing female control of the timing of stigma receptivity in the self-compatible annual Collinsia heterophylla. By performing one-donor crosses in the greenhouse, we found that differences in both recipients and pollen donors influenced when stigmas became receptive. Because we did not detect an interaction effect, our result suggests that some donors were consistently better than others at germinating pollen and siring seeds earlier. Unexpectedly, self-pollen was able to fertilize seeds earlier during floral development compared with outcross pollen. These results suggest that female control on timing of stigma receptivity is not complete in this species. In addition, fertilizations that occurred early during floral development resulted in fewer seeds than later fertilizations, possibly indicating a cost of lost control over the onset of receptivity. The ability of pollen donors to influence the timing of stigma receptivity might reflect a conflict between the sexual functions in C. heterophylla.},
  author       = {Lankinen, Åsa and Kiboi, Samuel},
  issn         = {0003-0147},
  keyword      = {Plantago: physiology,Flowers: physiology},
  language     = {eng},
  pages        = {854--863},
  publisher    = {University of Chicago Press},
  series       = {American Naturalist},
  title        = {Pollen donor identity affects timing of stigma receptivity in Collinsia heterophylla (Plantaginaceae): a sexual conflict during pollen competition?},
  url          = {http://dx.doi.org/10.1086/522839},
  volume       = {170},
  year         = {2007},
}