The coevolution of flower longevity and self‐fertilization in hermaphroditic plants

Xu, Kuangyi

doi:10.1111/evo.14303

Cited by 4 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In highly self‐pollinating species, by contrast, the maintenance of extended floral longevities would serve no function and may be costly. Indeed, recent theory indicates that the evolution of selfing should decrease flower longevity (Xu, 2021). It is possible that our simple binary classification of compatibility status was too coarse an indicator of mating system, and some of the self‐compatible species included in our dataset may be primarily mixed mating rather than autogamous.…”

Section: Discussionmentioning

confidence: 99%

Global analysis of floral longevity reveals latitudinal gradients and biotic and abiotic correlates

et al. 2022

View full text Add to dashboard Cite

The length of time a flower remains open and functionalfloral longevitygoverns important reproductive processes influencing pollination and mating and varies considerably among angiosperm species. However, little is known about large-scale biogeographic patterns and the correlates of floral longevity.Using published data on floral longevity from 818 angiosperm species in 134 families and 472 locations world-wide, we present the first global quantification of the latitudinal pattern of floral longevity and the relationships between floral longevity and a range of biotic and abiotic factors.Floral longevity exhibited a significant phylogenetic signal and was longer at higher latitudes in both northern and southern hemispheres, even after accounting for elevation. This latitudinal variation was associated with several biotic and abiotic variables. The mean temperature of the flowering season had the highest predictive power for floral longevity, followed by pollen number per flower. Surprisingly, compatibility status, flower size, pollination mode, and growth form had no significant effects on flower longevity.Our results suggest that physiological processes associated with floral maintenance play a key role in explaining latitudinal variation in floral longevity across global ecosystems, with potential implications for floral longevity under global climate change and species distributions.

show abstract

Section: Discussionmentioning

confidence: 99%

Global analysis of floral longevity reveals latitudinal gradients and biotic and abiotic correlates

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The previous results assume the population is outcrossing, but selfing is quite common in hermaphroditic plants. The previous study suggests that different modes of selfing may have different effects on the evolution of flower longevity (Xu 2021). Therefore, here I consider two cases of selfing, depending on whether selfing relies on the pollination process.…”

Section: Resultsmentioning

confidence: 99%

Evolution of pollination-induced plasticity of flower longevity

2023

Preprint

Self Cite

View full text Add to dashboard Cite

In many plants, pollen deposition or removal can lead to early flower senescence, while flowers will live longer when pollination is excluded, and the strength of this pollination-induced plasticity of flower longevity varies across populations. This study builds models to investigate the evolution of the plasticity of flower longevity through group and individual selection under stochastic pollination environments. Generally, stronger plasticity evolves when female and male fitness accrual rates are higher and more volatile, and the evolution of plasticity is also strongly affected by daily maintenance cost of flowers relative to construction costs. Group selection only selects for plasticity in the female function (i.e., ovule fertilization) but not in the male function (i.e., pollen removal), and plasticity is optimal in maximizing fitness only when saved resources through plasticity greatly enhance individual fitness. Plasticity is more likely to evolve under individual selection, but under the same pollination environment, any combination of the plasticity in female and male functions that adds up to a certain overall strength of plasticity can be evolutionarily stable. Given the fact that plasticity in the male function is rare in hermaphroditic populations, the plasticity of flower longevity may evolve mainly through group selection instead of individual selection.

show abstract

“…In such species, self-pollination is blocked or delayed until the opportunity for outcrossing has passed. Delayed selfing is thought to have evolved in preferentially allogamous species because it would provide some reproductive assurance when populations suffer from the lack of compatible pollen (Goodwillie and Weber 2018; Ruane et al 2020; Xu 2021).…”

Section: Discussionmentioning

confidence: 99%

“…The copyright holder for this preprint this version posted July 15, 2021. ; https://doi.org/10. 1101/2021 In this study, we thus aimed at better characterizing the mating system of the two floral morphs in Western European populations of Lgh by tracking the fates of self-and inter-morph pollen tubes in both floral morphs. First, we searched for structural evidences through analysis of the morphologies of pollen grains and stigma surfaces of the two floral morphs that may be characteristic of homomorphic and heteromorphic sporophytic self-incompatibilities.…”

Section: Introductionmentioning

confidence: 99%

Late-acting self-incompatible system, preferential allogamy and delayed selfing in the heteromorphic invasive populations ofLudwigia grandiflora subsp. hexapetala

Bozec

et al. 2021

Preprint

View full text Add to dashboard Cite

Mating system influences local population genetic structure, effective size, offspring fitness and functional variation. Determining the respective importance of self- and cross-fertilization in hermaphroditic flowering plants is thus important to understand their ecology and evolution. The worldwide invasive species, Ludwigia grandiflora subsp. hexapetala (Lgh) presents two floral morphs: one self-compatible short-styled morph (S-morph) and one self-incompatible long-styled morph (L-morph). Most invasive populations worldwide are only composed of self-incompatible L-morphs, which questions the importance of sexual reproduction during the invasion. In this study, we identified the mating systems of western European experimental and natural populations of Lgh by comparing structural characteristics of pollen and style, by studying self- and cross-pollen tube elongations and the viability of the resulting seeds and seedlings in both morphs. Our results showed no differences in pollen shape and stigma surfaces among and between the two floral morphs. In the self-incompatible L-morph flowers, self-pollen tubes were stopped tardily, in the ovarian area, and were unable to fertilize the ovules. This first formal identification of a late-acting, prezygotic self-incompatible system in Ludwigia genus questions on the distribution of this mating system in the Myrtales order. In the self-compatible S-morph flowers, rarer in worldwide invasive populations, self-pollen always succeeded to self-fertilize the ovules that nearly all developed into viable seedlings. However, cross-pollen tubes always elongated faster than self-pollen tubes. S-morph individuals may thus advantage preferential allogamy over selfing when cross-pollen is available despite its self-compatibility. As expected in late-acting self-incompatible systems, L-morph flowers authorised 0.2‰ of selfed seeds during the uppermost flowering season, that increased to 1‰ at the end of the flowering season. Such delayed selfing resulting in a significant quantity of viable floating seeds may contribute to the local regeneration, seed bank and propagation of the L-morph, which may explain its invasion success worldwide. Management plans of Lgh would gain to consider the mixed mating system we identified.

show abstract

The coevolution of flower longevity and self‐fertilization in hermaphroditic plants

Cited by 4 publications

References 47 publications

Global analysis of floral longevity reveals latitudinal gradients and biotic and abiotic correlates

Global analysis of floral longevity reveals latitudinal gradients and biotic and abiotic correlates

Evolution of pollination-induced plasticity of flower longevity

Late-acting self-incompatible system, preferential allogamy and delayed selfing in the heteromorphic invasive populations ofLudwigia grandiflora subsp. hexapetala

Contact Info

Product

Resources

About