The effect of Delphinium nelsonii pollen on seed set in Ipomopsis aggregata, a competitor for hummingbird pollination
Abstract
Sympatric plant species can compete for pollination services in several ways. For example, pollinators may move between species and deposit heterospecific pollen on stigmas, which in turn may reduce the efficacy of conspecific pollen. We explored this possibility by determining the effect of Delphinium nelsonii pollen on seed set in Ipomopsis aggregata. These montane herbs are pollinated by hummingbirds, experience heterospecific pollen deposition in nature, and suffer reduced seed set in each other's presence. We hand‐pollinated flowers of I . aggregata with either pure conspecific pollen or a mixture of pollen of the two species. Resulting pollen loads on stigmas ranged from 0–865 D. nelsonii grains and from 10–336 I . aggregata grains; mean seed set per flower was 11.3. There was no detectable effect of D. nelsonii pollen load on I. aggregata seed set. It is possible that seed set reductions seen in previous studies of competition for pollination between these species were caused by pollen wastage, pollen layering on the pollinator, or the temporal sequence of pollen arrival at the stigma.
Local Knowledge Graph (8 entities)
Related Works
Items connected by shared entities, co-authorship, citations, or semantic similarity.
Competition for hummingbird pollination and sequential flowering in two Colorado wildflowers
Pollen precedence and stigma closure: a mechanism of competition for pollination between Delphinium nelsonii and Ipomopsis aggregata
Heterospecific pollen deposition in <i>Delphinium barbeyi</i>: linking stigmatic pollen loads to reproductive output in the field
Data from: Influence of plant reproductive systems on the evolution of hummingbird pollination
Data from: Phylogeny does not predict the outcome of heterospecific pollen-pistil interactions in a species-rich alpine plant community
Data from: Quantifying direct vs. indirect effects of nectar robbers on male and female components of plant fitness
Growing Colorado Plants From Seed: State of the Art Volume III
Native Plant Revegetation Guide for Colorado
Proceedings: Using Seeds of Native Species on Rangelands
Cited By (90 times, 9 in Knowledge Hub)
Phylogeny does not predict the outcome of heterospecific pollen–pistil interactions in a species-rich alpine plant community
Competitive context drives pollinator behavior: linking foraging plasticity, natural pollen deposition, and plant reproduction.
Effects of Interspecific Pollen Transfer (IPT) in a Specialist and a Generalist Flower
Interspecific pollen transfer as a mechanism of competition: effect of Castilleja linariaefolia pollen on seed set of Ipomopsis aggregata
Effects of Local Density on Pollination and Reproduction in <i>Delphinium nuttallianum</i> and <i>Aconitum columbianum</i> (Ranunculaceae)
Seed set and seed mass in <i>Ipomopsis aggregata</i>: variance partitioning and inferences about postpollination selection
Effects of snowpack on the timing and abundance of flowering in Delphinium nelsonii: implications for climate change
Reproductive costs of self-pollination in Ipomopsis aggregata: are ovules usurped?
Pollen precedence and stigma closure: a mechanism of competition for pollination between Delphinium nelsonii and Ipomopsis aggregata
References (22)
1 in Knowledge Hub, 21 external