Individual pollen limitation, phylogeny and selection

Floral adaptation and diversification under pollen limitation.

Pollen limitation (PL) of seed production creates unique conditions for reproductive adaptation by angiosperms, in part because, unlike under ovule or resource limitation, floral interactions with pollen vectors can contribute to variation in female success. Although the ecological and conservation consequences of PL have received considerable attention in recent times, its evolutionary implica...

Among - individual variation in pollen limitation and inbreeding 1 depression in a mixed - mating

Among-individual variation in pollen limitation and inbreeding depression in a mixed-mating shrub.

BACKGROUND AND AIMS Variation in inbreeding depression (δ) among individual plants is considered to play a central role in mating system evolution and population genetics. Moreover, such variation could be linked to individual susceptibility to pollen limitation (PL) because those individuals strongly affected by δ for seed production will require more outcross pollen for setting a given number...

Pollen limitation and natural selection on floral characters in the yellow monkeyflower, Mimulus guttatus.

In flowering plants, pollen limitation has been proposed to intensify selection on floral characters important in pollinator attraction, but may also select for traits that increase seed set through autonomous selfing. Here, a factorial design (+/- pollen addition, +/- pollinator removal) was used to investigate how the pollination environment affects selection on floral morphology via female f...

Individual resource limitation combined with populationwide pollen availability drives masting in the valley oak (Quercus lobata)

1. Masting, the synchronized production of variable seed crops, is widespread among woody plants, but there is no consensus about the underlying proximate mechanisms. To understand this population-level behaviour, it is necessary to dissect the behaviour of individual trees as well as the interactions that synchronize them. 2. Here, we test a model of masting in which variability in seed set is...