写真a

GOTOH Ayako

Position

Associate Professor

Homepage URL

http://www.konan-u.ac.jp/hp/aya-got/index.html

External Link

Graduating School 【 display / non-display

  • Tokyo Metropolitan University   Faculty of Science   Graduated

    1998.4 - 2002.3

Graduate School 【 display / non-display

  • Ehime University   Graduate School, Division of Agricltural Sciences   Doctor's Course   Completed

    2004.4 - 2008.2

  • The University of Tokyo   Graduate School, Division of Science   Master's Course   Completed

    2002.4 - 2004.3

Campus Career 【 display / non-display

  • KONAN UNIVERSITY   Faculty of Science and Engineering   Faculty of Science and Engineering Department of Physics   Associate Professor

    2014.4

External Career 【 display / non-display

  • 独立行政法人日本学術振興会

    2011.4 - 2013.3

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    Country:Japan

  • 自然科学研究機構生理学研究所

    2010.9 - 2011.3

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    Country:Japan

  • 自然科学研究機構基礎生物学研究所

    2008.4 - 2010.8

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    Country:Japan

  • 独立行政法人日本学術振興会

    2005.4 - 2007.3

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    Country:Japan

 

Papers 【 display / non-display

  • Caste differentiation of spermatheca and organs related to sperm use and oviposition in the honeybee, Apis mellifera

    Ayako Gotoh, Ken Sasaki

    Apidologie   52 ( 1 )   262 - 271   2021

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    Joint Work

    © 2020, INRAE, DIB and Springer-Verlag France SAS, part of Springer Nature. Striking queen–worker dimorphism associated with each task is a key feature of highly eusocial insects, including Apis mellifera. The present study histologically examined the developmental process of the internal reproductive organs including spermatheca, valve-fold in the vagina, semi-circular muscle surrounding the common oviduct, and abdominal ganglia in honeybee queens and workers. During the pupal stage, queens showed an increased spermathecal reservoir, development of the tracheal network surrounding the spermathecal reservoir, and elongation of the spermathecal gland. Compared with queens, these developmental processes were never observed during the pupal stage in workers. Moreover, development of the valve-fold and semi-circular muscle was aborted, and they became rudimentary at the middle pupal stage in workers. Morphological caste differences in the abdominal ganglia were observed from the prepupal stages, showing that the most posterior ganglion was fused with the anterior ganglia in queens but not in workers.

    DOI: 10.1007/s13592-020-00815-9

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  • Transcriptome characterization of male accessory glands in ants to identify molecules involved in their reproductive success

    A. Gotoh, S. Shigenobu, S. Shigenobu, K. Yamaguchi, S. Kobayashi, F. Ito, K. Tsuji

    Insect Molecular Biology   27   212 - 220   2018.4

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    Joint Work

    © 2017 The Royal Entomological Society In insects, seminal fluid proteins that are produced by male accessory glands and transferred to females during mating have key functions in sperm competition and sperm physiology that lead to male reproductive success. In ants, male reproductive success also depends on the longevity of sperm stored in the queen's spermatheca because their sexual offspring are usually produced only after a prolonged storage period. We identified genes that were up-regulated in the male accessory glands relative to the bodies of Crematogaster osakensis to characterize the reproductive molecules associated with male reproductive success in ants. We found novel genes that had no hits in a homology search and that were predominantly expressed in the accessory glands. These reproductive proteins may have evolved under rapid positive selection for reproductive success in the species. Furthermore, we discovered that three spermatheca-specific genes of C. osakensis queens were also enriched in the accessory glands relative to the bodies of males. These genes may be important for maintaining the sperm quality continuously from ejaculation by males to prolonged storage by queens. This research provides crucial information about the molecular mechanisms of sperm maintenance and sexual selection in ants, and also insight into the evolution of reproductive strategies in insects.

    DOI: 10.1111/imb.12364

    PubMed

  • Journey of sperms from production by males to storage by queens in Crematogaster osakensis (Hymenoptera: Formicidae).

    Gotoh A, Furukawa K

    Journal of insect physiology   105   95 - 101   2018.2

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  • Transcriptome profiling of the spermatheca identifies genes potentially involved in the long-term sperm storage of ant queens.

    Gotoh A, Shigenobu S, Yamaguchi K, Kobayashi S, Ito F, Tsuji K

    Scientific reports   7 ( 1 )   5972   2017.7

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  • Social structure of the polygynous ant, Crematogaster osakensis

    A. Gotoh, M. Dansho, S. Dobata, Y. Ikeshita, F. Ito

    Insectes Sociaux   64   123 - 131   2017.2

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    Joint Work

    © 2016, International Union for the Study of Social Insects (IUSSI). The colony structures of social insects vary greatly among species. In ant societies, the number of queens within a colony is variable during colony maturation. We investigated the social structure of a polygynous ant Crematogaster osakensis in a series of field and laboratory experiments. First, the initial colonies headed by multiple queens were found in the field. In laboratory experiments, queens that were artificially cohabited after their nuptial flight harmoniously co-existed even in the presence of newly emerged workers, suggesting that mated queens of this species can establish their colony cooperatively as primary polygynous colonies. In addition, the mating frequency of a queen was typically more than one, estimated from the sperm number stored in field-collected males and queens, and from genetic relatedness among daughters of lab-reared monogynous colonies. Second, our assessment of genetic relatedness in a mature field colony of this species revealed that dealated queens, as well as workers and alates, were relatives. The number of developed oocytes identified reproductive skew in two of five field-collected nests. Moreover, under laboratory conditions, the most fertile egg layer altered over 3 months of observation. Based on these lines of evidence, we propose that in C. osakensis, polygynous foundresses might either be unrelated and subsequently be replaced by daughter queens of particular foundresses, or be related in the first place.

    DOI: 10.1007/s00040-016-0522-y

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Books and Other Publications 【 display / non-display

  • 外来アリのはなし

    後藤 彩子(第2章 増殖マシンとしてのアリ)

    朝倉書店  2020.5 

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Review Papers (Misc) 【 display / non-display

  • アリ科女王の長期間にわたる精子貯蔵メカニズム

    後藤彩子

    比較生理生化学   35 ( 3 )   150 - 157   2018.12

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  • 昆虫におけるメスの精子貯蔵器官の機能に関わる分子

    後藤彩子

    甲南大学紀要. 理工学編   ( 1 )   1 - 16   2018.1

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  • 香川県丸亀市飯野山のアリ

    池下洋平, 後藤彩子, 山本和典, 谷口伸弘, 伊藤文紀

    香川生物   34   59 - 62   2007

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  • 香川県からスズバチネジレバネとスズメバチネジレバネを記録

    木船悌嗣, 倉橋伴知, 後藤彩子, 段床稔, 伊藤文紀

    四国虫報   40   25   2006

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