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Note on the taxonomy, biogeography and conservation of endangered plant species in the Ryukyus
Goro Kokubugata,Masatsugu Yokota,Masahiro Kato 한국식물분류학회 2010 식물 분류학회지 Vol.40 No.4
The Ryukyus Archipelago consists of about 200 nearly subtropical islands located between Japan proper and Taiwan. Previous studies have found the Ryukyus to be a region of high biodiversity with many endangered vascular plant taxa, but they are not comprehensive. Here, we discuss the phytogeographic features and circumstances of the endangered plant taxa, make suggestions for effective in situ conservation, and highlight endangered plants in the Ryukyus that require further study.
Chikako Ishii,Satoshi Kakishima,박찬호,Takuro Ito,Atsushi Abe,Goro Kokubugata,송관필 국립생물자원관 2023 Journal of species research Vol.12 No.3
We conducted phylogenetic analyses using multiplexed inter-simple sequence repeat genotyping by sequencing and compared chloroplast DNA sequences among Ardisia japonica, A. pusilla, and morphologically intermediate plants found on Jeju Island, Korea. Our network analysis demonstrated that the intermediate plants were genetically positioned between A. japonica and A. pusilla. Our comparison of the intergenic spacer between the psbA and trnH genes in chloroplast DNA indicated that four nucleotide substitutions separate A. japonica and A. pusilla, whereas the intermediate plants exhibited the A. japonica haplotype. Our results suggest that the intermediate plants on Jeju Island represent a natural hybrid of A. japonica, as the maternal species, and A. pusilla, and that they are attributable to Ardisia×walkeri. This record constitutes the first documented occurrence of the hybrid taxon in Korea.