Effects of sequential pollination on the success of “fast” and “slow” pollen donors in <i>Hibiscus moscheutos</i> (Malvaceae)

Snow, Allison A.; Li, Hong

doi:10.2307/2656742

Cited by 29 publications

(29 citation statements)

References 20 publications

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“…In their study, after a first compatible pollination, both the success of a second pollen donor and seed yield decreased the longer the inter-pollination interval. In Hibiscus moscheutos, experimental manipulation of first and second pollen arrival indicates that inter-pollination interval plays a crucial role for fertilization success (Snow et al 2000).…”

Section: Variation Among Donor Plants In Seed Siring Successmentioning

confidence: 99%

Seed paternity in flowering plants: an evolutionary perspective

Bernasconi

2003

Perspectives in Plant Ecology, Evolution and Systematics

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the male function. Also, paternity can be the end result of competition for fertilization among pollen from one or several donors, selection processes occurring between pollen deposition and fertilization, and post-zygotic events such as seed abortion.Pre-zygotic competition and selection processes in flowering plants are relevant under several aspects (e.g. Snow & Lewis 1993;Delph & Havens 1998 AbstractThe ultimate importance of paternal contributions to fitness and of post-pollination selection in flowering plants have remained elusive, largely because of the technical difficulty of assigning paternity. I review empirical studies that use heritable markers to investigate per-fruit seed paternity in natural populations and after experimental multiple-donor pollination. Thirty-one studies covering 23 species from 16 plant families document that in natural populations seeds from a single fruit are often fathered by multiple pollen donors (5 species from 5 families), that donors can differ significantly in seed-siring success (8 species from 6 families), that variation in pollen tube growth rates can be heritable (n = 1 out of 4 studies), that donor and recipient genotypes can simultaneously affect paternity (n = 2), and that temporal order of pollen deposition (n = 1) and environmental effects (n = 2) affect the outcome of pollen competition. These studies also investigate the role of post-pollination selection in the avoidance of inbreeding and for species boundaries. Most studies of male reproductive success in plants to date base on isozyme electrophoresis. The availability in the last decade of highly polymorphic molecular markers such as microsatellite DNA has been expected to open new possibilities to investigate competition and selection during the gametophytic phase. Yet, to date, there is still need for greater data wealth on seed paternity to test theories of sex allocation and to gain deeper understanding of floral trait evolution and of the evolutionary consequences of post-pollination selection in flowering plants.

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Section: Variation Among Donor Plants In Seed Siring Successmentioning

confidence: 99%

Seed paternity in flowering plants: an evolutionary perspective

Bernasconi

2003

Perspectives in Plant Ecology, Evolution and Systematics

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“…Previous studies have shown that pollen-tube growth rate is an important predictor of the genetic composition of the seed crop at silver birch seed orchards (Pasonen et al 1999, Pasonen et al 2002, leading to deviations from random fertilizations. The timing of pollen arrival on the stigma, and pollen Á/style and pollen Á/pollen interactions taking place during pollen germination have also been shown to affect the fertilization ability of the pollen (Marshall & Ellstrand 1986, Cruzan 1990, Snow et al 2000. If there are many pollen grains competing for fewer ovules, it might be an advantage for a pollen grain to be able to interfere with the germination of other pollen grains.…”

Section: Introductionmentioning

confidence: 96%

Pollen–pollen interactions inPinus sylvestris

Parantainen

Pasonen

2004

Scandinavian Journal of Forest Research

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Direct pollen Á/pollen interactions can influence pollen fertilization ability when pollen from different donors and origins germinate on the same flower. In this study, in vitro germination tests were used to study direct pollen Á/pollen interactions in Scots pine (Pinus sylvestris L.). Pollen from southern (S, latitude 618 N) and northern (N, latitude 688 N) origins was germinated separately and in pairs at two temperatures (16 and 208C), and pollen germination percentages and pollen tube lengths of the samples were analysed. The observed pollen performances of the two-donor pollen mixtures were compared with the mean performances of the pure pollen samples germinated in isolation. The significant difference between the observed and expected pollen performances indicated pollen Á/pollen interactions. Among S)/S mixtures, only negative pollen Á/pollen interactions (0/ interference) were detected, while only positive interactions were found among N)/N mixtures. Both types of interaction were substantially more frequent at the lower temperature. In general, direct pollen Á/pollen interactions during in vitro germination were rather infrequent and are not likely to have substantial influence on fertilization abilities in vivo in seed orchards or in natural forest stands of Scots pine. However, direct pollen Á/pollen interactions can be more pronounced among certain genotypes, which should be considered in artificial crossing experiments using pollen mixtures.

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“…We propose that under some circumstances floral receptivity may be reduced by donor manipulation through pollen-induced wilting. Indeed, experimental pollinations in several species (Marshall and Ellstrand 1985;Cowan et al 2000;Snow et al 2000) showed a first-male advantage, implying that the first pollen donor often obtains higher fitness against laterarriving pollen. Several mechanisms may mediate this firstmale advantage, including rate of pollen germination and growth under male control or female control, head start, layering, and the effect of a pollen-borne wilting substance, as proposed here.…”

Section: Discussionmentioning

confidence: 99%

Sexual Conflict Over Floral Receptivity

2006

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Abstract. In flowering plants, the onset and duration of female receptivity vary among species. In several species the receptive structures wilt upon pollination. Here we explore the hypothesis that postpollination wilting may be influenced by pollen and serve as a general means to secure paternity of the pollen donor at the expense of female fitness. Taking a game-theoretical approach, we examine the potential for the evolution of a pollen-borne wilting substance, and for the coevolution of a defense strategy by the recipient plant. The model without defense predicts an evolutionarily stable strategy (ESS) for the production of wilting substance. The ESS value is highest when pollinator visiting rates are intermediate and when the probability that pollen from several donors arrives at the same time is low. This finding has general implications in that it shows that male traits to secure paternity also can evolve in species, such as plants, where mating is not strictly sequential. We further model coevolution of the wilting substance with the timing of stigma receptivity. We assume that pollen-receiving plants can reduce the costs induced by toxic pollen by delaying the onset of stigmatic receptivity. The model predicts a joint ESS, but no female counter-adaptation when the wilting substance is highly toxic. This indicates that toxicity affects the probability that a male manipulative trait stays beneficial (i.e., not countered by female defense) over evolutionary time. We discuss parallels to male induced changes in female receptivity known to occur in animals and the role of harm for the evolution of male manipulative adaptations.Key words. Arms race, floral longevity, pollen competition, pollination, protandry, receptivity.Over all reproductive modules, the female function of many plant species is often pollen limited . Nevertheless, in animal-pollinated plants, pollen deposited on single flowers often exceeds the number of fertilizable ovules (Levin 1990;Bernasconi et al. 2006a) and is derived from genetically different pollen donors (Ellstrand 1984;Marshall and Ellstrand 1985;Campbell 1998; S. Teixeira and G. Bernasconi, unpubl. ms.), providing opportunity for competition among different pollen donors for fathering the seeds (Delph and Havens 1988;Snow and Lewis 1993;Stanton 1994;Bernasconi 2003).The length of time a flower is open and the duration of receptivity of female function beyond the first pollen deposition may influence the number of effective pollinator visits and thus reproductive success. Specifically, variation in floral longevity may affect the number and genetic diversity of competing pollen donors (Primack 1985;Galen et al. 1986;Bingham and Orthner 1998;Ashman 2004) and yield a range of benefits to the pollen recipient. These include ensuring sufficient pollen; optimizing genetic composition of the pollen load; increasing the probability of outcrossing; and increasing number, genetic diversity or quality of the offspring (Schemske and Pautler 1984;Schlichting et al. 1987Schlichting et al. ...

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Effects of sequential pollination on the success of “fast” and “slow” pollen donors in Hibiscus moscheutos (Malvaceae)

Cited by 29 publications

References 20 publications

Seed paternity in flowering plants: an evolutionary perspective

Seed paternity in flowering plants: an evolutionary perspective

Pollen–pollen interactions inPinus sylvestris

Sexual Conflict Over Floral Receptivity

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