Effects of Pollen Load Composition and Deposition Pattern on Pollen Performance in <i>Clarkia unguiculata</i> (Onagraceae)

Németh, Michał; Smith‐Huerta, Nancy L.

doi:10.1086/342034

Cited by 18 publications

(21 citation statements)

References 32 publications

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“…These results suggest that the within‐plant component of variation in pollen tube numbers probably arises because of stochastic variations over very short distances in the number, vigour and/or donor diversity of pollen grains reaching the stigma. Small‐scale variations in pollen germinating behaviour and performance due, for instance, to variable degrees of clumping, paternal composition, or deposition patterns (Thomson, 1989; Holm, 1994; Németh & Smith‐Huerta, 2002) may also contribute to such small‐scale stochasticity.…”

Section: Discussionmentioning

confidence: 99%

Distribution ecology of pollen tubes: fine‐grained, labile spatial mosaics in southern Spanish Lamiaceae

Herrera

2003

New Phytologist

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Summary• Patterns of intraspecific variation in the number of pollen tubes per style in naturally pollinated plants are poorly known, yet that information is essential for assessing the frequency of occurrence and evolutionary implications of microgametophyte competition in the wild.• This paper analyses intraspecific variation in the number of pollen tubes per style for six species of southern Spanish insect-pollinated Lamiaceae ( Ballota hirsuta , Lavandula latifolia , Marrubium supinum , Phlomis lychnitis , Rosmarinus officinalis and Teucrium rotundifolium ) differing in growth form, phenology, flower size and pollinators.• Number of pollen tubes exceeded number of fertilizable ovules in 26 -87% of styles, and mean number per pollen tube of other pollen tubes in the same style varied between five and 12. Within-plant variation in pollen tube number was extensive in all species, accounting for 68-92% of total population-level variance. In L. latifolia mean pollen tube number per style differed between populations and between plants within populations, but such differences were not consistent among years.• It is concluded that opportunities for microgametophyte competition and selection on competitive ability are considerable in all species studied, although extreme spatial fine-graininess and marked stochasticity in the variation of pollen tube numbers, including temporal inconstancy of individual differences, will greatly reduce the opportunity for selection on sporophytic characters influencing degree of microgametophyte competition.

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Section: Discussionmentioning

confidence: 99%

Distribution ecology of pollen tubes: fine‐grained, labile spatial mosaics in southern Spanish Lamiaceae

Herrera

2003

New Phytologist

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“…A host of studies have demonstrated that pollen germination can be influenced by paternal identity, maternal identity, and environmental factors, such as temperature, humidity, and pH (e.g., Cook and Walden, 1967; Barnes and Cleveland, 1972; Campbell, 1982; Nemeth and Smith‐Huerta, 2002; Hedhly et al, 2003; Boavida and McCormick, 2007; Jolivet and Bernasconi, 2007; Smith‐Huerta et al, 2007; Austerlitz et al, 2012). Pollen germination can also be influenced by other pollen.…”

Section: Pollen Performance Traits That Influence Nonrandom Matingmentioning

confidence: 99%

Pollen performance traits reveal prezygotic nonrandom mating and interference competition in Arabidopsis thaliana

Swanson

Hammond

Carlson

et al. 2016

American J of Botany

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“…When mixtures of pollen donors were used, a decrease in pollen performance has been documented (Marshall et al. ; Németh and Smith‐Huerta ).…”

Section: Discussionmentioning

confidence: 99%

“…Such effects of single-donor pollination treatments on seed production were not observed in the petal color polymorphic Dactylorhiza incarnata (Vallius et al 2008). When mixtures of pollen donors were used, a decrease in pollen performance has been documented (Marshall et al 1996;Németh and Smith-Huerta 2002).…”

Section: Pollen Performancementioning

confidence: 97%

Pollen competition between morphs in a pollen-color dimorphic herb and the loss of phenotypic polymorphism within populations

et al. 2018

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Flower color polymorphism is relatively uncommon in natural flowering plants, suggesting that maintenance of different color morphs within populations is difficult. To address the selective mechanisms shaping pollen-color dimorphism, pollinator preferences and reproductive performance were studied over three years in Epimedium pubescens in which some populations had plants with either green or yellow pollen (and anthers). Visitation rate and pollen removal and receipt by the bee pollinator (Andrena emeishanica) did not differ between the two color morphs. Compared to the green morph, siring success of the yellow morph's pollen was lower, but that of mixtures of pollen from green and yellow morphs was lowest. This difference, corresponding to in vivo and ex vivo experiments on pollen performance, indicated that pollen germination, rather than tube growth, of the green morph was higher than that of the yellow morph and was seriously constrained in both morphs if a pollen competitor was present. A rare green morph may invade a yellow-morph population, but the coexistence of pollen color variants is complicated by the reduced siring success of mixed pollinations. Potential pollen competition between morphs may have discouraged the maintenance of multiple phenotypes within populations, a cryptic mechanism of competitive exclusion.

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Effects of Pollen Load Composition and Deposition Pattern on Pollen Performance in Clarkia unguiculata (Onagraceae)

Cited by 18 publications

References 32 publications

Distribution ecology of pollen tubes: fine‐grained, labile spatial mosaics in southern Spanish Lamiaceae

Distribution ecology of pollen tubes: fine‐grained, labile spatial mosaics in southern Spanish Lamiaceae

Pollen performance traits reveal prezygotic nonrandom mating and interference competition in Arabidopsis thaliana

Pollen competition between morphs in a pollen-color dimorphic herb and the loss of phenotypic polymorphism within populations

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