Evolutionary Interpretations of Differences in Pollen Tube Growth Rates

@article{Walsh1992EvolutionaryIO,
  title={Evolutionary Interpretations of Differences in Pollen Tube Growth Rates},
  author={Noreen E. Walsh and Deborah Charlesworth},
  journal={The Quarterly Review of Biology},
  year={1992},
  volume={67},
  pages={19 - 37}
}
The striking opportunities for competition in the pollination stage of the life cycle of flowering plants have been remarked on for many years, yet it is still not clearly known how much genetic variation for the rates of growth of pollen tubes exists in natural populations. Here we review the evidence for such variation, and discuss some of the possible mechanisms by which this thype of variation could be maintained. If faster pollen tube growth rates tend to be correlated with higher fitness… Expand
THE EFFECTS OF SELECTION IN THE GAMETOPHYTE STAGE ON MUTATIONAL LOAD
We have studied a multilocus selection model of a plant population in which mutations to deleterious alleles occur that may affect not only the diploid sporophyte stage, but also the haploid pollenExpand
Pollen-tube growth rates in Collinsia heterophylla (Plantaginaceae): one-donor crosses reveal heritability but no effect on sporophytic-offspring fitness.
TLDR
The results suggest that pollen-tube growth rate can respond to selection via male function, consistent with the hypothesis that pollen competition is itself selectively advantageous, through both male and female function, by reducing the genetic load among successful gametophytic fathers (pollen), and reducing inbreeding depression associated with self-pollination in plants with mix-mating systems. Expand
Evolution of development of pollen performance.
TLDR
Here, it is suggested ways in which studies of pollen performance or function could progress by cross-fertilization between the "evo" and "devo" fields. Expand
Evolution of pistil length as a choice mechanism for pollen quality
TLDR
It is found that length of the pistil affects selection of pollen tube growth rate, and female preference and male competitive ability co-evolve, but this does not necessarily lead to a positive relationship between the two. Expand
Selection on pollen competitive ability in relation to stochastic factors influencing pollen deposition
TLDR
Variability in pollen tube growth rate was high enough to allow fast tube growth to be beneficial even when the effect of stochastic factors was taken into account, making it plausible that sexual selection can act on pollen tube Growth rate in Viola tricolor. Expand
The joint evolution of mating system and pollen performance: Predictions regarding male gametophytic evolution in selfers vs. outcrossers
TLDR
Four predictions derived from the logic that pollen performance should evolve with mating system as an adaptive response to: (1) the competitive environment among pollen genotypes and (2) variation among female genotypes regularly encountered by a given pollen genotype are proposed. Expand
Why fast-growing pollen tubes give rise to vigorous progeny: the test of a new mechanism
TLDR
The results suggest that differential provisioning by the maternal plant can lead to differences in progeny vigour following pollen competition, which is independent of the speed of growth of the pollen tubes. Expand
The effect of pollen competition on maintenance of variation in fertilisation ability
TLDR
The dynamic model shows that maintenance of variation in male competitive ability is more probable when differences in pollen competitive ability influence male fitness, i.e., in cases with pollen competition, than when Differences in this trait only is a side effect of selection for more viable individuals. Expand
Dynamics of pollen tube growth under different competition regimes
TLDR
The fact that under different pollen competition regimes the number of pollen tubes is reduced by the same proportion in each stylar level indicates that genetic interactions play an important role in the control of pollen tube attrition. Expand
The potential for adaptive evolution of pollen grain size in Mimulus guttatus.
TLDR
Heritable variation in PGS was found in all three populations, with heritabilities of between 19 and 40% (average 30%), and no consistent patterns of correlated response were found in other characters, indicating that PGS can respond to selective forces acting on PGS alone. Expand
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References

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We have studied a multilocus selection model of a plant population in which mutations to deleterious alleles occur that may affect not only the diploid sporophyte stage, but also the haploid pollenExpand
Evidence for Pollen Competition in Plants and Its Relationship to Progeny Fitness: A Comment
TLDR
It will be necessary to show that the differences between pollen tubes growing in the same style are indeed caused during pollination or fertilization to exclude the possibility that they are due to differential survival of different classes of zygotes, and to get clear evidence on this point. Expand
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The results suggest a lack of gametophytic competition and indicate little opportunity for sexual selection on pollen tube growth in C. fasciculata, and suggest the genetic relatedness among parents may influence pollen performance. Expand
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TLDR
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TLDR
The gametophytic life stage has received relatively little attention from plant ecologists, perhaps because it has a short life span and its interactions lie hidden within the pistil, but this interval may play a significant role in plant mating systems. Expand
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TLDR
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TLDR
It is clear that, in wild radish, the opportunity for natural or sexual selection to effect change in seed weight or seed number per fruit appears to be greater through Differences in female performance than through differences in male performance. Expand
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