- 著者
- Kenji Suetsugu Alberto Bruno Izai Sabino Kikuchi Monica Suleiman Hirokazu Tsukaya
- 出版者
- 日本植物分類学会
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.68, no.2, pp.117-121, 2017 (Released:2017-09-12)
Several new populations of the mycoheterotrophic orchid Kalimantanorchis nagamasui from Sabah, Borneo, Malaysia, are reported. The species was previously considered endemic to West Kalimantan, Borneo, Indonesia. Given that the continued discovery of new species and distributional records of mycoheterotrophic plants have been made from only a limited number of surveys in a small selection of sites, it is likely that further surveys in Borneo will reveal additional occurrences. The description of the morphology, in particular on the underground parts and size variation, of K. nagamasui is also updated.
- 著者
- Kenji Suetsugu Arief Hidayat Hirokazu Tsukaya
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.69, no.2, pp.135-137, 2018 (Released:2018-06-30)
The discovery of a new locality of the mycoheterotrophic Gastrodia spathulata (Orchidaceae) in West Java, Indonesia, during herbarium studies in BO is reported. This species was previously considered an endemic species in Mt. Kinabalu, Sabah, Borneo.
- 著者
- HIROSHI OKADA HIROKAZU TSUKAYA MOTOHARU OKAMOTO
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.54, no.1, pp.69-75, 2003-06-09 (Released:2017-03-23)
- 参考文献数
- 13
Cayratia japonica showed intra-specific polyploidy of x=20, i.e., 2n=40 (diploid) and 60 (triploid). Individuals with 2n=40 produced fruits, and formed 20 bivalents at metaphase I in meiosis, but their pollen fertilities widely varied from about 30 to 90%. Individuals with 2n=60 did not produce any fruits, formed a variable number of trivalents, bivalents and univalents at metaphase I, and showed low pollen fertilities of less than 30%. The possible occurrence of some genetic types for pollen development in diploids is discussed.
- 著者
- TETSUKAZU YAHARA HIROKAZU TSUKAYA
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.59, no.2, pp.97-104, 2008-07-30 (Released:2017-03-21)
- 参考文献数
- 39
A new species of Oxygyne (Thismiaceae), O. yamashitae, a saprophytic/mycoheterotrophic species from Yaku Island, Kagoshima Prefecture, Japan, is described and illustrated. The combination of characters such as three stamens attached to the perianth and the presence of lamellae at the mouth of the perianth tube indicate that it belongs to the genus Oxygyne. It is clearly distinct from other known species of Oxygyne in having an elliptic hole in the corona, in which stamens are inflexed, and in having three dichotomous appendages below the stigma. The discovery of O. yamashitae demonstrates that the lowland evergreen forest in Yaku Island is a hotspot of endemic plants and worthy to be conserved.
- 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
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.