著者

Satoshi Kakishima Masahiro Sueyoshi Yudai Okuyama

出版者

National Museum of Nature and Sciece (National Science Museum, Tokyo)

雑誌

国立科学博物館研究報告B類(植物学) (ISSN:18819060)

巻号頁・発行日

vol.47, no.4, pp.227-236, 2021-11-22 (Released:2021-12-07)

参考文献数

28

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We assessed plausible linkages between floral variation and pollination-system diversity in the genus Asarum (sect. Heterotropa) by investigating the floral-visitor and floral-scent profiles of Asarum asaroides (C.Morren et Decne.) Makino, a large-flowered species endemic to western Japan. Using time-lapse photography and field collections of insects, we confirmed that multiple dipteran families visited A. asaroides. The fungus gnat Cordyla murina Winnertz, 1863 (Mycetophilidae), is likely the primary pollinator, since we observed repeated visits by this species at three spatially distinct sites. We also reassessed the previously posited primary pollinator of A. tamaense Makino and found that C. murina is in fact the likely primary pollinator of this species. The floral-scent profile of A. asaroides typically contains ethyl 3-methylcrotonate, 3-octanone, 3-octanol, safrole, and caryophyllene, and is strikingly different from that of A. tamaense, implying that different mechanisms underlie the attraction of C. murina to these closely related species.

著者

Chie Tsutsumi Ayako Maeda Atsushi Abe Yumi Yamashita Tomohisa Yukawa Satoshi Kakishima

出版者

National Museum of Nature and Sciece (National Science Museum, Tokyo)

雑誌

国立科学博物館研究報告B類(植物学) (ISSN:18819060)

巻号頁・発行日

vol.47, no.3, pp.131-141, 2021-08-20 (Released:2021-08-31)

参考文献数

24

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The taxonomy of Japanese Oberonia, particularly O. makinoi, has been confusing. Molecular analyses of Japanese Oberonia, including plants called “O. makinoi,” were performed. Phylogenetic trees deduced from the nuclear internal transcribed spacer (ITS) region, the plastid matK with trnK introns, and single-nucleotide polymorphisms (SNPs) data derived from MIG-seq show that “O. makinoi” collected from Shikoku and Kyushu is distinctive from the other species of Oberonia. The plants called “O. makinoi” differ from O. japonica in the leaf size and the flowering season. Furthermore, samples from the Ryukyus (Okinawa and Amami Islands) appear conspecific with, or closely related to “O. makinoi.” The taxonomic treatment of Japanese Oberonia requires further analyses using samples collected from central Japan and comparison to congeners in neighboring areas, particularly in Taiwan, where similar species are distributed.

著者

Mika SHIRASU Kouki FUJIOKA Satoshi KAKISHIMA Shunji NAGAI Yasuko TOMIZAWA Hirokazu TSUKAYA Jin MURATA Yoshinobu MANOME Kazushige TOUHARA

出版者

(社)日本農芸化学会

雑誌

Bioscience, Biotechnology, and Biochemistry (ISSN:09168451)

巻号頁・発行日

vol.74, no.12, pp.2550-2554, 2010-12-23 (Released:2010-12-23)

参考文献数

16

被引用文献数

31

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The titan arum, Amorphophallus titanum, is a flowering plant with the largest inflorescence in the world. The flower emits a unique rotting animal-like odor that attracts insects for pollination. To determine the chemical identity of this characteristic odor, we performed gas chromatography-mass spectrometry-olfactometry analysis of volatiles derived from the inflorescence. The main odorant causing the smell during the flower-opening phase was identified as dimethyl trisulfide, a compound with a sulfury odor that has been found to be emitted from some vegetables, microorganisms, and cancerous wounds.