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오늘 본 자료
Syou Kato,Jiro Tanaka,Norio Tanaka,Jun Yokoyama,Yu Ito,Yoichiro Fujiwara,Atsushi Higa,신고 고바야시,Makoto M. Watanabe,Hidetoshi Sakayama 국립중앙과학관 2021 Journal of Asia-Pacific Biodiversity Vol.14 No.1
Members of the brackish-water species Lamprothamnium succinctum (Charales, Charophyceae) arewidely distributed from tropical to temperate regions, including East Asia. In Japan, L. succinctum is listedas an endangered species and is protected by the government, because it was recorded only at two localities,Lake Hachiro-gata (Akita Prefecture) and Oo-ike pond (Deba-jima Island, Tokushima prefecture),and has become extinct in the former. In this study, we identified five new localities of this species inJapan. The morphological characteristics of their thalli agreed with those provided in the originaldescription of this species, with distinctive reproductive characteristics. Moreover, the oospores of Japanesespecimens of L. succinctum were examined for the first time using scanning electron microscopy. The oospores of Japanese specimens exhibited granulate fossa wall patterns, which were consistent withthose described in previous studies. Our genetic analyses based on the DNA sequences of two chloroplastDNA markers, including both the coding and non-coding regions, revealed that the sample from Oo-ikepond is distinguishable from those from other Japanese specimens, although they are genetically verysimilar.