scholarly journals A geographic cline in the ability to self-fertilize is unrelated to the pollination environment

Ecology ◽  
2017 ◽  
Vol 98 (11) ◽  
pp. 2930-2939 ◽  
Author(s):  
Matthew H. Koski ◽  
Dena L. Grossenbacher ◽  
Jeremiah W. Busch ◽  
Laura F. Galloway
Keyword(s):  
Pollination Environment

scholarly journals Adaptive plasticity of floral display size in animal-pollinated plants

2005 ◽  
Vol 272 (1581) ◽  
pp. 2651-2657 ◽  
Author(s):  
Lawrence D Harder ◽  
Steven D Johnson
Keyword(s):  
Display Size ◽  
Adaptive Plasticity ◽  
Floral Display ◽  
Mating Costs ◽  
Pollen Removal ◽  
Floral Display Size ◽  
Subsequent Exposure ◽  
Pollen Vectors ◽  
Benefit Cost ◽  
Pollination Environment

Plants need not participate passively in their own mating, despite their immobility and reliance on pollen vectors. Instead, plants may respond to their recent pollination experience by adjusting the number of flowers that they display simultaneously. Such responsiveness could arise from the dependence of floral display size on the longevity of individual flowers, which varies with pollination rate in many plant species. By hand-pollinating some inflorescences, but not others, we demonstrate plasticity in display size of the orchid Satyrium longicauda . Pollination induced flower wilting, but did not affect the opening of new flowers, so that within a few days pollinated inflorescences displayed fewer flowers than unpollinated inflorescences. During subsequent exposure to intensive natural pollination, pollen removal and receipt increased proportionally with increasing display size, whereas pollen-removal failure and self-pollination accelerated. Such benefit–cost relations allow plants that adjust display size in response to the prevailing pollination rate to increase their attractiveness when pollinators are rare (large displays), or to limit mating costs when pollinators are abundant (small displays). Seen from this perspective, pollination-induced flower wilting serves the entire plant by allowing it to display the number of flowers that is appropriate for the current pollination environment.

scholarly journals Temporal quantification of mating system parameters in a coastal Douglas-fir seed orchard under manipulated pollination environment

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Jiayin Song ◽  
Blaise Ratcliffe ◽  
Tony Kess ◽  
Ben S. Lai ◽  
Jiří Korecký ◽  
...  
Keyword(s):  
Mating System ◽  
Seed Orchard ◽  
Douglas Fir ◽  
System Parameters ◽  
Pollination Environment

scholarly journals Uncertain pollination environment promotes the evolution of a stable mixed reproductive system in the self-incompatible Hypochaeris salzmanniana (Asteraceae)

2017 ◽  
Vol 120 (3) ◽  
pp. 447-456 ◽  
Author(s):  
M Arista ◽  
R Berjano ◽  
J Viruel ◽  
M Á Ortiz ◽  
M Talavera ◽  
...  
Keyword(s):  
Reproductive System ◽  
The Self ◽  
Pollination Environment

FIRE, BEES, AND SEED PRODUCTION IN A MEDITERRANEAN KEY SPECIES SALVIA FRUTICOSA MILLER (LAMIACEAE)

1999 ◽  
Vol 47 (3) ◽  
pp. 157-163 ◽  
Author(s):  
Gidi Ne'eman ◽  
Amots Dafni
Keyword(s):  
Seed Production ◽  
Standing Crop ◽  
Solitary Bees ◽  
Burned Area ◽  
Flower Visitation ◽  
Salvia Fruticosa ◽  
Long Term Effect ◽  
Key Species ◽  
Nectar Standing Crop ◽  
Pollination Environment

The typical Mediterranean phrygana has a very rich biodiversity of plants and of solitary bees. Fire may kill the brood of soil-nesting and other solitary bees and may affect pollen and nectar sources. Such changes would be expected to influence seed production in populations of post-fire obligate seeder species and thus also their population dynamics. We compared nectar standing crop, flower visitation rate of bumble bees and solitary bees, and consequent seed production in a typical Mediterranean shrub (Salvia fruticosa Miller) growing in unburned east Mediterranean phrygana vegetation and in an adjacent burned area. The volume of nectar standing crop in the burned area was higher than in the unburned area, while the nectar concentration showed the opposite trend. The mean frequency of Bombus' visits was higher in the burned area, while solitary bees visited flowers only in the unburned habitats. The seed production of S. fruticosa was significantly lower in the burned area. This reduction might have a long-term effect on post-fire species composition and abundance due to the fact that this species is an obligate post-fire seeder. The present evidence indicates that the bee-dependent pollination environment was not re-balanced even six years after fire. This situation has important implications concerning plant species and their bee pollinator diversity.

A phylogenetic analysis of trait convergence in the spring flora1This article is part of a Special Issue entitled “Pollination biology research in Canada: Perspectives on a mutualism at different scales”.

Botany ◽  
2012 ◽  
Vol 90 (7) ◽  
pp. 557-564 ◽  
Author(s):  
Lisa E. Hensel ◽  
Risa D. Sargent
Keyword(s):  
Growth Form ◽  
Flowering Phenology ◽  
Ecological Traits ◽  
Corolla Colour ◽  
Apparent Correlation ◽  
Forest Strata ◽  
Temperate Deciduous ◽  
Temperate Deciduous Forests ◽  
Pollination Environment ◽  
Biology Research

In temperate deciduous forests, spring flowering plants exhibit remarkable similarity in a number of characteristics, including reproductive, vegetative, and ecological traits. The apparent convergence of floral traits, especially corolla colour, among spring flowering species has been well documented, but remains poorly understood. Here we review adaptive hypotheses and predictions that have been proposed to explain the apparent correlation between spring flowering and a suite of traits. We investigated the correlation between flowering phenology (i.e., spring or nonspring) and several key traits using phylogenetic comparative methods. Through this analysis we were able to confirm the existence of a correlation for five of the six traits examined. Specifically, spring flowering is shown to have evolved in a correlated fashion with reproductive schedule (perennial vs. annual), light corolla colour, fruit type, growth form, and forest strata layer. In general, our survey determined that spring flowering species are perennial, have light coloured corollas, a herbaceous growth form, and tend to occupy the understory of the forest. These results are discussed in light of the reviewed adaptive hypotheses and the spring pollination environment.

scholarly journals A stable pollination environment limits current but not potential evolution of floral traits

2019 ◽  
Author(s):  
Maria Clara Castellanos ◽  
Javier Montero-Pau ◽  
Peio Ziarsolo ◽  
Jose Miguel Blanca ◽  
Joaquin Cañizares ◽  
...  
Keyword(s):  
Field Studies ◽  
Floral Traits ◽  
Stabilizing Selection ◽  
Heritable Variation ◽  
Genome Wide ◽  
Stable Conditions ◽  
In The Wild ◽  
High Heritability ◽  
Vast Variation ◽  
Pollination Environment

AbstractPlants’ vast variation in floral traits at a macroevolutionary level is often interpreted as the result of adaptation to pollinators. However, field studies often find no evidence of pollinator-mediated selection on flowers. This could be explained by periods of stasis, when selection is relaxed under stable conditions, followed by pollinator changes that provide innovative selection. We asked if periods of stasis are caused by stabilizing or absence of other forms of selection on floral traits, or by low trait heritability even if selection is present. We studied Ulex parviflorus, a plant predominantly pollinated by one bee species across its range. We measured heritability and evolvability of floral traits, using genome-wide molecular relatedness in a wild population, and combined this with estimates of selection. We found evidence for both stabilizing selection and low trait heritability as explanations for stasis in flowers. The area of the standard petal is under stabilizing selection, but the variability observed in the wild is not heritable. A separate trait, floral size, in turn presents high heritability, but is not currently under selection. We show how a stable pollination environment can lead to a lack of evolutionary change, yet maintain heritable variation to respond to future selection pressures.

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