Graduate School of Integrated Arts and Sciences, Kochi University, Monobe-Otsu, Nankoku, Kochi 783-8502, Japan.
Faculty of Pharmaceutical Science, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514, Japan.
FEMS Microbiol Lett. 2022 Aug 8;369(1). doi: 10.1093/femsle/fnac065.
Phosphonic acid (phosphonate) that possesses a carbon-phosphours bond is a chemically stable form of organic phosphorus. Various phosphonic acids are widely distributed in oceanic waters; in particular, methylphosphonic acid (namely methylphosphonate) is believed to be responsible for global methane production. To discuss the microbial degradation of phosphonic acids, we investigated the utilization of phosphonic acid compounds by cultures of marine bacteria, Phaeobacter sp., Ruegeria sp. (Rhodobacterales), and Thalassospira sp. (Rhodospirillales). These bacterial cultures were able to grow on methylphosphonic acid as well as on the tested alkyl-, carboxy-, aminoalkyl-, and hydroxyalkyl-phosphonic acid compounds. Cell yields and growth rates of Ruegeria and Thalassospira cultures grown on methyl-, ethyl-, propyl-, and butyl-phosphonic acid compounds tended to decrease with increasing alkyl chain length. In contrast, Phaeobacter sp. grew well on such alkyl-phosphonic acids. Our results suggest that these marine bacteria, which exhibit varied utilization, are involved in microbial degradation of various phosphonic acid compounds.
膦酸（膦酸盐）具有碳-磷键，是有机磷的化学稳定形式。各种膦酸广泛分布于海洋水中; 特别是，甲基膦酸（即甲基膦酸）被认为是全球甲烷产生的原因。为了讨论膦酸的微生物降解，我们研究了海洋细菌、Phaeobacter sp.、Ruegeria sp.（Rhodobacterales）和 Thalassospira sp.（Rhodospirillales）培养物对膦酸化合物的利用。这些细菌培养物能够在甲基膦酸以及测试的烷基、羧基、氨烷基和羟烷基膦酸化合物上生长。在甲基膦酸、乙基膦酸、丙基膦酸和丁基膦酸化合物上生长的 Ruegeria 和 Thalassospira 培养物的细胞产率和生长速率随着烷基链长度的增加而趋于降低。相比之下，Phaeobacter sp. 在这些烷基膦酸上生长良好。我们的结果表明，这些具有不同利用方式的海洋细菌参与了各种膦酸化合物的微生物降解。
