Effects of pollination timing on seed paternity and seed mass in Silene latifolia (Caryophyllaceae)

Burkhardt, Anne; Internicola, Antonina I.; Bernasconi, Giorgina

doi:10.1093/aob/mcp154

Cited by 23 publications

(25 citation statements)

References 64 publications

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“…In S. latifolia, fruits are often sired by many fathers, suggesting that pollen competition is very likely [3], increasing selection pressures on pollen germination rate. Our result that rapid pollen germination increases siring success is consistent with the finding that pollination timing strongly affects the proportion of seeds sired [68].…”

Section: Discussionsupporting

confidence: 92%

The effects of inbreeding, genetic dissimilarity and phenotype on male reproductive success in a dioecious plant

et al. 2011

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Pollen fate can strongly affect the genetic structure of populations with restricted gene flow and significant inbreeding risk. We established an experimental population of inbred and outbred Silene latifolia plants to evaluate the effects of (i) inbreeding depression, (ii) phenotypic variation and (iii) relatedness between mates on male fitness under natural pollination. Paternity analysis revealed that outbred males sired significantly more offspring than inbred males. Independently of the effects of inbreeding, male fitness depended on several male traits, including a sexually dimorphic (flower number) and a gametophytic trait (in vitro pollen germination rate). In addition, full-sib matings were less frequent than randomly expected. Thus, inbreeding, phenotype and genetic dissimilarity simultaneously affect male fitness in this animal-pollinated plant. While inbreeding depression might threaten population persistence, the deficiency of effective matings between sibs and the higher fitness of outbred males will reduce its occurrence and counter genetic erosion.

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Section: Discussionsupporting

confidence: 92%

The effects of inbreeding, genetic dissimilarity and phenotype on male reproductive success in a dioecious plant

et al. 2011

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“…Burkhardt et al . ), and species with binucleate pollen (e.g. Thomson ), which is quiescent during dispersal and germinates slowly (see Hoekstra ).…”

Section: Discussionmentioning

confidence: 99%

The population ecology of male gametophytes: the link between pollination and seed production

2016

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The fate of male gametophytes after pollen reaches stigmas links pollination to ovule fertilisation, governing subsequent siring success and seed production. Although male gametophyte performance primarily involves cellular processes, an ecological analogy may expose insights into the nature and implications of male gametophyte success. We elaborate this analogy theoretically and present empirical examples that illustrate associated insights. Specifically, we consider pollen loads on stigmas as localised populations subject to density-independent mortality and density-dependent processes as they traverse complex stylar environments. Different combinations of the timing of pollen-tube access to limiting stylar resources (simultaneous or sequential), the tube distribution among resources (repulsed or random) and the timing of density-independent mortality relative to competition (before or after) create signature relations of mean pollen-tube success and its variation among pistils to pollen receipt. Using novel nonlinear regression analyses (two-moment regression), we illustrate contrasting relations for two species, demonstrating that variety in these relations is a feature of reproductive diversity among angiosperms, rather than merely a theoretical curiosity. Thus, the details of male gametophyte ecology should shape sporophyte reproductive success and hence the dynamics and structure of angiosperm populations.

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“…Several factors can play a role in determining the net benefits. On one hand, not all eggs hatch successfully (Burkhardt, Delph & Bernasconi 2009) and plants respond to infestation with increased fruit abortion (Jolivet & Bernasconi 2006, Burkhardt, Internicola & Bernasconi 2009; Elzinga & Bernasconi 2009). On the other hand, larvae usually consume more than one fruit on the same plant (Biere & Honders 1996).…”

Section: Discussionmentioning

confidence: 99%

Male moths provide pollination benefits in the Silene latifolia–Hadena bicruris nursery pollination system

Labouche

Bernasconi

2010

Functional Ecology

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Summary1. Evolutionary conflicts of interest underlie mutualisms, including plant ⁄ pollinator interactions. This is particularly evident in 'nursery pollination', in which the pollinators lay eggs inside the flowers and the offspring of the pollinator consume the developing seeds. Low benefit (pollination service) to cost (seed predation) ratios could destabilize such associations towards parasitism. 2. Although in most of the well-known cases pollen transfer is associated with oviposition, in some systems the males of the seed predator may contribute to pollination, affecting the strength and outcome of the interaction between the plant and their ovipositing pollinators. In addition, in dioecious species male and female plants differ in the direct costs of seed predation and benefits of attracting pollinators, which may lead to sex-specific strategies. 3. We investigated whether pollinator and plant sex affect pollination in the interaction between dioecious plant Silene latifolia and its nursery pollinator, Hadena bicruris (Noctuidae). 4. Data on visitation behaviour and pollination efficiency in experimental plant patches demonstrate that (i) male moths are equally efficient pollinators as female moths, leading to fruit initiation in around 80% of visits and to fertilization of around 45% of the ovules in one visit; (ii) female and male moths do not preferentially visit flowers of one sex; and (iii) feeding behaviour is sufficient to ensure pollen transfer. However, female moths visited significantly more flowers than male moths. 5. Altogether this suggests that both moth sexes provide a pollination benefit to the plant with no differences in pollination efficiency but that female moths, before seed predation costs are accounted for, seem to provide greater benefits owing to their increased activity. That male moths contribute to seed production likely decreases the plant's dependency on ovipositing moths for pollination.

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Effects of pollination timing on seed paternity and seed mass in Silene latifolia (Caryophyllaceae)

Cited by 23 publications

References 64 publications

The effects of inbreeding, genetic dissimilarity and phenotype on male reproductive success in a dioecious plant

The effects of inbreeding, genetic dissimilarity and phenotype on male reproductive success in a dioecious plant

The population ecology of male gametophytes: the link between pollination and seed production

Male moths provide pollination benefits in the Silene latifolia–Hadena bicruris nursery pollination system

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