Tsubasa Toji

ORCID: 0000-0003-4899-3390
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About
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Research Areas
  • Plant and animal studies
  • Plant Parasitism and Resistance
  • Insect and Arachnid Ecology and Behavior
  • Insect and Pesticide Research
  • Plant Reproductive Biology
  • Fossil Insects in Amber
  • Horticultural and Viticultural Research
  • Ecology and Vegetation Dynamics Studies
  • Insect-Plant Interactions and Control
  • Genetic diversity and population structure
  • Plant Pathogens and Resistance
  • Lepidoptera: Biology and Taxonomy
  • Insect symbiosis and bacterial influences
  • Lichen and fungal ecology
  • Plant and Biological Electrophysiology Studies
  • Hymenoptera taxonomy and phylogeny
  • Genetic and Environmental Crop Studies
  • Insect behavior and control techniques
  • Phytoplasmas and Hemiptera pathogens
  • Plant and Fungal Species Descriptions
  • Plant Diversity and Evolution

Nihon University
2023-2025

The University of Tokyo
2022-2023

Shinshu University
2018-2022

Ōtani University
2021

Geographic differences in floral traits may reflect geographic effective pollinator assemblages. Independent local adaptation to assemblages multiple regions would be expected cause parallel trait evolution, although sufficient evidence for this is still lacking. Knowing the intraspecific evolutionary history of will reveal events that occur early stages diversification. In study, we investigated relationship between flower spur length and size 16 populations

10.1002/ece3.8668 article EN Ecology and Evolution 2022-03-01

Abstract Background Geographic differences in floral size sometimes reflect geographic pollinator size. However, we know little about whether this specialization to the regional occurred independently at many places or once and then spread across distribution range of plant species. Results We investigated relationship between local flowers 12 populations Lamium album var. barbatum on two different mountains Japan Alps. Then, using 10 microsatellite markers, analyzed genetic differentiation...

10.1186/s12862-021-01796-8 article EN cc-by BMC Ecology and Evolution 2021-04-24

Abstract Cimicifuga simplex (Ranunculaceae) has three genetically distinct pollination morphs. Here, we report that each of the morphs C. differs from others with regard to sex expression and mating system: morph I consists mostly ramets hermaphroditic flowers only female flowers, II male III flowers. A microsatellite analysis seed DNA showed a high self‐fertilization rate. Flowering season flower visitor assemblages, which also differ among morphs, may influence evolution maintenance...

10.1111/1442-1984.12265 article EN Plant Species Biology 2020-01-15

Abstract Cimicifuga simplex has three genetically and ecologically distinct pollination morphs with different flowering phenology, flower sex expressions, selfing rates. A previous study showed that strong protandry in hermaphroditic flowers of C. causes there to be seasonal minority sexes; for example, unisexual female ramets are advantageous the first half season bloom then (minority hypothesis). That study, however, did not distinguish among . We investigated ratio changes pollinator...

10.1002/ecs2.3251 article EN cc-by Ecosphere 2020-09-01

Cimicifuga simplex Wormsk. (Ranunculaceae) is a perennial herb distributed in eastern and northeastern Asia for which at least three different pollination morphs have been reported. It classified as endangered or near threatened some Japanese regions, its rhizome commercially used crude drug. To examine genetic differentiation gene flow among the morphs, we developed eight microsatellite markers by using next-generation sequencing estimated structure of C. simplex. We tested primer pairs on...

10.4236/ajps.2018.94046 article EN American Journal of Plant Sciences 2018-01-01

The authors declare no conflict of interest. Data (Nakase et al., 2022) are available in Figshare: https://doi.org/10.6084/m9.figshare.20055143. Appendix S1 Please note: publisher is not responsible for the content or functionality any supporting information supplied by authors. Any queries (other than missing content) should be directed to corresponding author article.

10.1002/ecy.3811 article EN Ecology 2022-07-08

Superparasitism (multiple parasites in a single host) is one of the most significant examples density-dependent intraspecific competition among insect parasitoids. In this study, we showed that multiple parasitism by Blissoxenos esakii (Insecta, Strepsiptera) induce earlier adult emergence than solitary (single parasite host). creates conditions wherein strepsipteran larvae must compete for limited (two) exit spaces on host body their as adults. As result, selection might have favored...

10.1002/bes2.2017 article EN cc-by Bulletin of the Ecological Society of America 2022-10-01

The behavioural patterns of flower-visiting insects are influenced by floral display size, reward, etc. We tested whether various taxa visiting Cimicifuga simplex would change their behaviour between hermaphroditic and female flowers. Male-phase flowers ramets provide flower visitors with nectar pollen as rewards, whereas only nectar. appearance the both sexes in C. is different hermaphrodite being relatively large ramet small. Therefore, to investigate how sexual differences rewards...

10.1080/00222933.2021.1946611 article EN Journal of Natural History 2021-05-19

Abstract BackgroundGeographic differences in flower size sometimes reflect geographic pollinator size. However, we know little about whether this specialization to the regional occurred independently at many places or once and then spread across distribution range of species. ResultsWe investigated relationship between local corolla tube length flowers morphological traits pollinators 12 populations Lamium album var. barbatum on two different mountains Japan Alps. Then, using 10...

10.21203/rs.3.rs-175528/v1 preprint EN cc-by Research Square (Research Square) 2021-02-05

Geographic differences in floral traits may reflect geographic effective pollinator assemblages. Independent local adaptation to assemblages multiple regions would be expected cause parallel trait evolution, although sufficient evidence for this is still lacking. In study, we investigated the relationship between flower spur length and size 16 populations of Aquilegia buergeriana var. distributed four mountain Japanese Alps. We also examined genetic yellow- red-flowered individuals, see if...

10.22541/au.163431641.17269372/v1 preprint EN cc-by Authorea (Authorea) 2021-10-15
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