Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan

Toji, Tsubasa; Ishimoto, Natsumi; Egawa, Shin; Nakase, Yuta; Hattori, Mitsuru; Itino, Takao

doi:10.1186/s12862-021-01796-8

Cited by 6 publications

(3 citation statements)

References 52 publications

(52 reference statements)

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“…Correspondingly, floral morphology in populations of L. album var. barbatum varied in relation to local pollinator size and did not reflect the degree of genetic relatedness among populations [49].…”

Section: Discussionmentioning

confidence: 85%

Phenotypic integration in three Lamium species’ response to light and density

Barisic-Klisaric

Avramov

Zivkovic

et al. 2021

ARCH BIOL SCI BELGRA

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Phenotypic correlations were calculated and the levels of phenotypic integration of three congeneric species, annual Lamium purpureum and perennial Lamium album and Lamium maculatum, were estimated. Calculations were performed separately for different stages of development during transplantation under different density and light treatments. L. purpureum exhibited greater integration in comparison to the other two species before exposure to environmental treatments, as well as greater variability in phenotypic correlations in response to light and density. The perennial species possessed similar correlation patterns in comparison to annual L. purpureum, becoming more similar to L. purpureum at later stages of development. The effects of density and light intensity were dependent on the specific combination of factors, as well as on the species under study. Density effects in L. purpureum were also habitat- and population-specific. A greater difference in response to density treatments between habitats than between populations was detected. Overall, phenotypes become more integrated during ontogeny, while dissimilarities in phenotypic correlations among species and between populations were more related to ecological than to phylogenetic differences.

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Section: Discussionmentioning

confidence: 85%

Phenotypic integration in three Lamium species’ response to light and density

Barisic-Klisaric

Avramov

Zivkovic

et al. 2021

ARCH BIOL SCI BELGRA

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“…Bumble bees were collected from different castes of four species with different morphology or behavior that can affect interaction with pollen morphology. As males of B. ardens accounted for seven out of 13 samples at Taiwa, there might be sampling bias due to altitudinal variation in species or castes of pollinating bumble bees (Kuriya et al 2015;Toji et al 2021). Further work is required to determine whether the diameter giving pollen grains high stickiness to bumble bee bodies depends on bumble bee species or castes.…”

Section: Pollen Grain For Successful Pollinationmentioning

confidence: 99%

Pollen morphology for successful pollination dependent on pollinator taxa in a generalist plant: Relationship with foraging behavior

Hasegawa

Itagaki

Sakai

2023

Preprint

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Pollen morphology varies at inter- and intraspecific levels. Its interaction with pollinator behavior and morphology determines pollen fate. We tested whether pollen morphology promoting successful pollination differs depending on pollinator taxa in a generalist shrub, Weigela hortensis (Caprifoliaceae). We identified flower visitors carrying pollen from anthers to stigmas and compared the spine length and diameter of the pollen grains they carried. We found that pollen on the bodies of bumble bees and hunch-back flies and the scopae of small bees (including andrenid bees) contributed to seed production. Pollen grains on the bodies of bumble bees had longer spines than those on the scopae of andrenid bees or the bodies of hunch-back flies. Pollen grains on the scopae of andrenid bees had larger diameters than those on hunch-back flies. Bumble bees collected pollen grains with shorter spines and larger diameters on their corbiculae while andrenid bees collected pollen grains with shorter spines and intermediate diameters on their scopae. The differences in morphology of pollen carried by pollinators reflected pollen collection from bodies to corbiculae/scopae by bees. Our findings suggest that pollen morphology has diversified to facilitate successful pollination by pollinating partners.

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“…the unit of the analysis was a pollen grain). We also measured the corolla tube length of each flower because it may correlate with pollen traits (Sarkissian & Harder 2001) or be subject to selection by pollinating partners (Anderson et al 2014;Toji et al 2021).…”

Section: Pollen Sampling and Trait Measurementsmentioning

confidence: 99%

Intraspecific variation in morphology of spiny pollen grains along an altitudinal gradient in an insect‐pollinated shrub

2022

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Intraspecific variations in pollen morphological traits are poorly studied. Interspecific variations are often associated with pollination systems and pollinator types. Altitudinal environmental changes, which can influence local pollinator assemblages, provide opportunities to explore differentiation in pollen traits of a single species over short distances. The aim of this study is to examine intraspecific variations in pollen traits of an insect-pollinated shrub, Weigela hortensis (Caprifoliaceae), along an altitudinal gradient.• Pollen spine phenotypes (length, number and density), pollen diameter, lipid mass (pollenkitt) around pollen grains, pollen production per flower and pollinator assemblages were compared at four sites at different altitudes.• Spine length and the spine length/diameter ratio of pollen grains were greater at higher altitudes but not correlated with flower or plant size. Spine number and density increased as flower size increased, and pollen lipid mass decreased as plant size increased. Bees were the predominant pollinators at low-altitude sites whereas flies, specifically Oligoneura spp. (Acroceridae), increased in relative abundance with increasing altitude.• The results of this study suggest that the increase in spine length with altitude was the result of selection favouring longer spines at higher-altitude sites and/or shorter spines at lower-altitude sites. The altitudinal variation in selection pressure on spine length could reflect changes in local pollinator assemblages with altitude.

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Intraspecific convergence of floral size correlates with pollinator size on different mountains: a case study of a bumblebee-pollinated Lamium (Lamiaceae) flowers in Japan

Cited by 6 publications

References 52 publications

Phenotypic integration in three Lamium species’ response to light and density

Phenotypic integration in three Lamium species’ response to light and density

Pollen morphology for successful pollination dependent on pollinator taxa in a generalist plant: Relationship with foraging behavior

Intraspecific variation in morphology of spiny pollen grains along an altitudinal gradient in an insect‐pollinated shrub

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