著者

パシットフティサク ウィプー 柳川 勝紀

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.131, no.6, pp.647-663, 2022-12-25 (Released:2023-01-12)

参考文献数

97

被引用文献数

2

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Previous single-gene surveys using 16S rRNA gene-based methods have revealed the phylogenetic classification, distribution, and diversity of as-yet uncultivated microbial lineages in diverse environments. In particular, archaeal communities associated with high-temperature terrestrial hot springs and sediments are dominated by novel thermophilic and hyperthermophilic populations whose physiological characters and ecological roles are unknown. Recent advances in metagenomic approaches and computational processing of huge volumes of DNA sequence data have further unveiled the evolutionary importance of uncultivated hot spring archaeal lineages and previously undescribed roles in biogeochemical cycles of carbon, nitrogen, sulfur, and metals. In this review article, the uncultured thermophilic and hyperthermophilic archaeal lineages that have accelerated our understanding of the tree of life are illustrated.

著者

加藤 大和 狩野 彰宏 森 大器 柳川 勝紀

出版者

一般社団法人 日本地質学会

雑誌

日本地質学会学術大会講演要旨

巻号頁・発行日

vol.2016, 2016

著者

柳川 勝紀 松本 良 鈴木 庸平

出版者

石油技術協会

雑誌

石油技術協会誌 (ISSN:03709868)

巻号頁・発行日

vol.77, no.5, pp.374-383, 2012 (Released:2014-03-29)

参考文献数

65

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Methane is one of the major end products from photosynthetic organic matter. Based on stable carbon and hydrogen isotopic compositions of methane, biological pathways mainly consisting of carbon dioxide reduction coupled to molecular hydrogen oxidation and acetate fermentation and abiological pathways such as thermal degradation of organic matter have been systematically classified. However, recent advances in subseafloor biosphere research have unveiled the complexity of processes involved in the transformation, migration and fate of methane. Particularly, it has been recognized that marine sediments with high flux of methane harbor novel lineages of microorganisms, the physiological traits of which are largely unknown due to their resistance to cultivation. In this review article, microbiological investigations that shed light on DNA-based microbial community structures and metabolic diversity and activity related to methane production and consumption in organic-rich marine sediments are briefly summarized.