Can plant hybridization and polyploidy lead to pollinator shift?

Rezende, Luiz; Suzigan, João; Amorim, Felipe W.; Moraes, Ana Paula

doi:10.1590/0102-33062020abb0025

Cited by 24 publications

(15 citation statements)

References 135 publications

(167 reference statements)

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“…In general, polyploidy in plants can have effect on the interactions between pollinators and plants, and may generate changes in the biology of species (Soltis et al 2004). Our study adds to the evidence of polyploidy exerting a behavioral change in pollinators toward their plant host (Rezende et al 2020). With global environmental change threatening the mutualism between organisms (Kearns et al 1998, Aslan et al 2013), the importance of governing a diverse, and resilient, pollinator fauna seems evident, both for safeguarding future crop yields and to counteract the threat a declining pollinator fauna poses to wild ecosystems.…”

Section: Discussionsupporting

confidence: 65%

“…Measurements of seven plant traits indicated that the tetraploid cultivars had fewer flower heads per plant, larger florets (longer corolla tubes), and lower pollen germination rate. Floral morphology was, in a review (Rezende et al 2020), the most frequent flower traits reported to be affected by hybridization and polyploidy. In line with our result on floret size in red clover, the consensus in the review was that polyploid species generally had larger flowers than diploids.…”

Section: Discussionmentioning

confidence: 99%

“…Polyploidy in plants is frequently reported to modify some main set of floral traits, such as flower morphology, color, phenology, floral scent, quality, and amount of floral rewards (nectar and pollen) and number of flowers, all which are mediating the communication between plants and pollinators (Rezende et al 2020). Plant traits have also been suggested to cause low seed set in tetraploid red clover cultivars.…”

Section: Introductionmentioning

confidence: 99%

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Do plant ploidy and pollinator tongue length interact to cause low seed yield in red clover?

Hederström

Rundlöf²,

Birgersson³

et al. 2021

Ecosphere

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The loss of long‐tongued pollinator species and dominance of a few short‐tongued generalist species, related to agricultural intensification in recent decades, may have consequences for the quality, quantity, and stability of yields in insect‐pollinated crops. Interestingly, the changes in pollinator community coincide with an increase in poor and variable seed yield in red clover, an important crop for green manure and forage production. However, to date we lack a holistic understanding of the factors that drive seed yield in red clover crops. To remedy this, we related plant and pollinator traits to pollinator visitation, behavior, and pollination efficiency in four diploid and five tetraploid red clover cultivars during three years in a common garden setting. Tetraploid cultivars produced 52% fewer seeds and 41% lower seed weight per flower head compared with diploid cultivars. They also had fewer flower heads per plant, larger florets, and lower pollen viability than diploids. Pollinator species with shorter tongues visited diploid cultivars more frequently than tetraploid cultivars. Pollinator species with longer tongues deposited more pollen and showed higher pollination efficiency in terms of seeds produced after single visits. Our results suggest that while both diploid and tetraploid red clover cultivars benefit from the presence of longer‐tongued pollinator species, seed yield in tetraploid cultivars may be more sensitive to the loss of these bumble bee species in intensively cultivated agricultural landscapes.

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Do plant ploidy and pollinator tongue length interact to cause low seed yield in red clover?

Hederström

Rundlöf²,

Birgersson³

et al. 2021

Ecosphere

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“…Bombus pascuorum Scopoli) preference can explain the seed yield differences between diploid and tetraploid red clover due to the complex pollination conditions (Vleugels et al 2015, 2019a, Vanommeslaeghe et al 2018). A recent review suggested that plant polyploidy may lead to the shifts in pollinator behaviour (Rezende et al 2020). Evaluation of pollinator performance based on single visits is critical in connecting pollination success and plant reproductive success (Ne'eman et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Different pollination approaches to compare the seed set of diploid and tetraploid red clover Trifolium pratense L.

Jing

Kryger

Boelt

2021

Nordic Journal of Botany

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In red clover seed production, low seed yield is limiting the commercial exploitation of tetraploid red clover. To explore if pollination is the limiting factor for the seed yield in tetraploid red clover, we investigated pollinator behaviour and plant reproductive success in diploid (2x) cultivar ‘Rajah' and tetraploid (4x) cultivar ‘Amos' using honey bee and hand pollination approaches. We measured the seed set at the flower head level with the increasing visitation rate of honey bees (one bee, two bees and open pollination) and pollen diversity (one and two pollen donors) of hand pollination. We found no difference in honey bee pollination behaviour (visitation rate) between the diploid and tetraploid red clover. Surprisingly, the seed set in two bees was significantly lower than that of one bee in ‘Rajah'. We suggest that honey bees prefer to visit already tripped florets or to visit fewer florets due to scent marks left by the previous honey bees. In open pollination, seed number per flower head in ‘Amos' (on average 11) was half of ‘Rajah' (on average 20). Seed set in ‘Amos' was lower than 50% of ‘Rajah' in honey bee (one bee treatment) and hand pollination (one and two pollen donors treatments). There were no differences in stigma receptivity whereas pollen viability in ‘Amos' was lower than ‘Rajah' after the peak pollen viability was reached (six days after the onset of flowering). We suggest that the fertility problems such as low pollen viability may be the reason for the low seed set in tetraploid red clover. This conclusion should be verified by investigating other fertility traits during the ovary, embryo and seed development with a broader range of diploid and tetraploid cultivars.

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“…Hedge [ 71 ] pointed to Mentha as an example of evolutionary trends in the Lamiaceae family, not in the least concerning floral asymmetry (actinomorphic versus zygomorphic flowers). Traits such as floral asymmetry and varying patterns of oil glands are possibly involved in insect–flower coevolution [ 72 , 73 , 74 , 75 , 76 ], and such traits are likely to be important for speciation. Some of the selected leaf characteristics (such as petiole and venation; Table S2 ) also have ecological relevance, for example, in response to varying humidity levels in the atmosphere and soil or in relation to herbivory (e.g., [ 77 ]), and are linked to differential adaptation (e.g., [ 78 , 79 ]).…”

Section: Discussionmentioning

confidence: 99%

A Revised Phylogeny of the Mentha spicata Clade Reveals Cryptic Species

Heylen¹,

Debortoli²,

Marescaux³

et al. 2021

Plants

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The genus Mentha is taxonomically and phylogenetically challenging due to complex genomes, polyploidization and an extensive historical nomenclature, potentially hiding cryptic taxa. A straightforward interpretation of phylogenetic relationships within the section Mentha is further hindered by dominant but outdated concepts on historically identified hybrid taxa. Mentha spicata is traditionally considered to be of hybrid origin, but the evidence for this is weak. Here, we aim to understand the phylogenetic relationships within the section Mentha using large sample sizes and to revisit the hybrid status and identity of M. spicata. We show that two of three traditional species in the subsection Spicatae are polyphyletic, as is the subsection as a whole, while the real number of cryptic species was underestimated. Compared to previous studies we present a fundamentally different phylogeny, with a basal split between M. spicata s.s. and M. longifolia s.s. Cluster analyses of morphological and genotypic data demonstrate that there is a dissociation between morphologically and genotypically defined groups of samples. We did not find any evidence that M. spicata is of hybrid origin, and we conclude its taxonomic status should be revised. The combination of genetic and phenotypic information is essential when evaluating hyperdiverse taxonomic groups.

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Can plant hybridization and polyploidy lead to pollinator shift?

Cited by 24 publications

References 135 publications

Do plant ploidy and pollinator tongue length interact to cause low seed yield in red clover?

Do plant ploidy and pollinator tongue length interact to cause low seed yield in red clover?

Different pollination approaches to compare the seed set of diploid and tetraploid red clover Trifolium pratense L.

A Revised Phylogeny of the Mentha spicata Clade Reveals Cryptic Species

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