- 著者
- Yasuro Kadono Satoko Iida
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.70, no.3, pp.173-182, 2019-10-31 (Released:2019-11-28)
DNA analysis and morphological observation were conducted for a putative Potamogeton hybrid endemic to the Fuji Five Lakes and Lake Ashi and Potamogeton × leptocephalus from Lake Biwa, Japan. Both proved to be hybrids between P. maackianus and P. perfoliatus. However, the hybrid from the Fuji Five Lakes and Lake Ashi was distinct from P. × leptocephalus in certain morphological characteristics. It is described as a new variety P. × leptocephalus var. fujiensis.
- 著者
- Satoko Iida Yasuro Kadono
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.73, no.1, pp.77-80, 2022-02-28 (Released:2022-03-25)
The parentage of the Potamogeton hybrids P. ×nomotoensis Kadono & T. Noguchi and P. ×yamaga- taensis Kadono & Wiegleb (Potamogetonaceae) was studied by analyzing the plastid-encoded rbcL gene and nuclear-encoded internal transcribed spacer (ITS) from the hybrids and putative parents. The results showed P. ×nomotoensis to be a hybrid between P. natans and P. maackianus and P. ×yamagataensis a hybrid between P. natans and P. oxyphyllus. The latter is the first documentation of a hybrid between diploid and tetraploid species in Japan.
- 著者
- Yasuro Kadono Satoko Iida
- 出版者
- The Japanese Society for Plant Systematics
- 雑誌
- Acta Phytotaxonomica et Geobotanica (ISSN:13467565)
- 巻号頁・発行日
- vol.73, no.1, pp.57-65, 2022-02-28 (Released:2022-03-25)
Species-level identification of aquatic plants, such as duckweeds (Lemnaceae), can be challenging due to reduced morphological features and high phenotypic plasticity. A taxonomic study of sect. Uninerves of the genus Lemna in Japan based on morphological observations and DNA analyses is reported. Two non- indigenous species, L. minuta and L. valdiviana, were confirmed to occur in Japan. Excessively small, enigmatic plants of Lemna apparently specialized to grow in spring-fed waterbodies was determined to be a form of L. minuta. It could not be concluded whether the miniature Lemna represents an ecotype adapted to cool water or an example of phenotypic variation under low temperature conditions.