Enhancing pollen competition by delaying stigma receptivity: Pollen deposition schedules affect siring ability, paternal diversity, and seed production in<i>Collinsia heterophylla</i>(Plantaginaceae)

Lankinen, Åsa; Madjidian, Josefin A.

doi:10.3732/ajb.1000510

Cited by 48 publications

(67 citation statements)

References 69 publications

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“…impaired offspring fitness due to homozygous deleterious alleles, according to the partial dominance model (Charlesworth and Charlesworth 1987)], suggesting an advantage of avoiding fertilization by low quality self-pollen (Lankinen and Armbruster 2007). Another study on receptive pistils in C. heterophylla which compared crosses involving outcross pollen donors, either divided as two pollinations over 2 days or applied as one pollination on the last day, indicated that later fertilization involving simultaneous additions of pollen donors increased offspring quantity (Lankinen and Madjidian 2011). Moreover, following crosses with a mixture of pollen from two donors in both partially receptive and receptive pistils, offspring quality was positively correlated with recipient floral receptivity (Madjidian 2011).…”

Section: Sexual Selection and Sexual Conflict In Plantsmentioning

confidence: 99%

“…It is not known which pollen fertilize the ovules or if this opportunity of pollen selection first in the style and second at the ovary site represents a fine-tuned selection mechanism that is beneficial for the female reproductive function. In C. heterophylla , hand-pollination on fully receptive stigmas performed on two consecutive days (24 h apart) resulted in some seeds sired from the second pollen load, despite that it takes only between 2 and 4 h for pollen to grow down the style (Lankinen and Madjidian 2011). Potentially, the pistil has a selection mechanism that favours diversity of the fertilized seeds (Bernasconi et al 2003).…”

Section: Examples Of Research Fields That Could Benefit From Considermentioning

confidence: 99%

“…Potentially, the pistil has a selection mechanism that favours diversity of the fertilized seeds (Bernasconi et al 2003). Enhancing pollen competition by hand-pollinating fully receptive stigmas only once at a late stage, as opposed to earlier and twice over 2 days, increased offspring quantity and genetic diversity in C. heterophylla (Lankinen and Madjidian 2011). …”

Section: Examples Of Research Fields That Could Benefit From Considermentioning

confidence: 99%

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Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Lankinen

Green

2015

AoB PLANTS

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Sexual selection and sexual conflict theories that explain evolution of sexual behaviour are often an integral part of animal studies investigating diverse research questions, e.g. in behaviour, ecology, physiology and immunology. In plants, however, relatively few studies investigate sexual selection and sexual conflict. In this review we discuss how taking these theories into account can be useful not only for our understanding of plant reproductive strategies but also in related research areas, including i) mechanisms of pollen-pistil interactions, ii) mating-system evolution in hermaphrodites and iii) plant immune responses to pests and pathogens.

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Section: Sexual Selection and Sexual Conflict In Plantsmentioning

confidence: 99%

Section: Examples Of Research Fields That Could Benefit From Considermentioning

confidence: 99%

Section: Examples Of Research Fields That Could Benefit From Considermentioning

confidence: 99%

See 1 more Smart Citation

Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Lankinen

Green

2015

AoB PLANTS

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“…In turn, the strength of this selection can be modulated by the maternal plant by altering style length (7-9), delaying stigma receptivity (10,11) and/or delaying pollen tube growth in the pistil (12). Paternal plants could also potentially alter the extent to which pollen are supplied with diploid transcripts, thereby modifying the extent of selection on the haploid genome.…”

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confidence: 99%

Evolution of haploid selection in predominantly diploid organisms

Otto

Scott

Immler

2015

Proc. Natl. Acad. Sci. U.S.A.

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Diploid organisms manipulate the extent to which their haploid gametes experience selection. Animals typically produce sperm with a diploid complement of most proteins and RNA, limiting selection on the haploid genotype. Plants, however, exhibit extensive expression in pollen, with actively transcribed haploid genomes.Here we analyze models that track the evolution of genes that modify the strength of haploid selection to predict when evolution intensifies and when it dampens the "selective arena" within which male gametes compete for fertilization. Considering deleterious mutations, evolution leads diploid mothers to strengthen selection among haploid sperm/pollen, because this reduces the mutation load inherited by their diploid offspring. If, however, selection acts in opposite directions in haploids and diploids ("ploidally antagonistic selection"), mothers evolve to reduce haploid selection to avoid selectively amplifying alleles harmful to their offspring. Consequently, with maternal control, selection in the haploid phase either is maximized or reaches an intermediate state, depending on the deleterious mutation rate relative to the extent of ploidally antagonistic selection. By contrast, evolution generally leads diploid fathers to mask mutations in their gametes to the maximum extent possible, whenever masking (e.g., through transcript sharing) increases the average fitness of a father's gametes. We discuss the implications of this maternal-paternal conflict over the extent of haploid selection and describe empirical studies needed to refine our understanding of haploid selection among seemingly diploid organisms.pollen competition | antagonistic selection | haploid selection | sperm competition | evolutionary theory

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“…Importantly, the magnitude of inbreeding depression can be reduced in the prezygotic phase with increased pollen competition in the stigma purging genetic load of self pollen, improving fitness of selfed progeny and consequently reducing the costs of inbreeding (Armbruster & Rogers, 2004;Lankinen & Armbruster, 2007). Thus, determining the effects of timing and load of self pollen deposited on the stigma will be critical aspects to understand mating system and its reproductive consequences (Lankinen & Madjidian, 2011).…”

Section: Introductionmentioning

confidence: 99%

Strong inbreeding depression and individually variable mating system in the narrow endemic <i>Erodium cazorlanum</i> (Geraniaceae)

Alonso¹,

García-Sevilla²

2013

Anal. Jard. Bot. Madr.

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Alonso, C. & García-Sevilla, M. 2013. Strong inbreeding depression and individually variable mating system in the narrow endemic Erodium cazorlanum (Geraniaceae). Anales Jard. Bot. Madrid 70(1): 72-80.Angiosperms evolved different systems to attract effective pollinators while reducing selfing in hermaphroditic flowers. Selfing ability can be advantageous when pollinators and/or mates are scarce, although inbreeding depression may largely reduce those advantages. Recent comparative analyses suggested endemic species tend to evolve self-compatibility but a better understanding of the associated reproductive and genetic tradeoffs is required. Experimental hand-pollinations under greenhouse conditions were conducted to investigate the selfing ability and estimate inbreeding depression up to the offspring' first reproductive event in Ero dium cazorlanum, a narrow endemic species restricted to dolomite outcrops in SE Spanish mountains. We found autonomous selfing ineffective. Further, when experimentally applied, pollen of the same flower produced significantly fewer fruits and seeds compared to geitonogamous and cross pollinations. The number of seeds per fruit was significantly higher after cross pollinations and strong inbreeding depression accumulated through the life-cycle. Interestingly, individual plants exhibited broad variation in selfing ability with six out of 14 individuals producing no seed after geitonogamy. Understanding the consequences of individual variation in self compatibility deserves further investigation in the field now that we know that strong inbreeding depression may limit recruitment of selfed progeny.

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Enhancing pollen competition by delaying stigma receptivity: Pollen deposition schedules affect siring ability, paternal diversity, and seed production inCollinsia heterophylla(Plantaginaceae)

Abstract: Our results suggest fitness advantages of enhancing pollen competition by delaying stigma receptivity in C. heterophylla, particularly in relation to increased paternal diversity.

Cited by 48 publications

References 69 publications

Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Using theories of sexual selection and sexual conflict to improve our understanding of plant ecology and evolution

Evolution of haploid selection in predominantly diploid organisms

Strong inbreeding depression and individually variable mating system in the narrow endemic <i>Erodium cazorlanum</i> (Geraniaceae)

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