PMID- 27652169 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20160921 LR - 20201001 IS - 2193-1801 (Print) IS - 2193-1801 (Electronic) IS - 2193-1801 (Linking) VI - 5 IP - 1 DP - 2016 TI - Microbial nitrification in throughfall of a Japanese cedar associated with archaea from the tree canopy. PG - 1596 LID - 10.1186/s40064-016-3286-y [doi] LID - 1596 AB - To investigate the nitrification potential of phyllospheric microbes, we incubated throughfall samples collected under the canopies of Japanese cedar (Cryptomeria japonica) and analyzed the transformation of inorganic nitrogen in the samples. Nitrate concentration increased in the unfiltered throughfall after 4 weeks of incubation, but remained nearly constant in the filtered samples (pore size: 0.2 and 0.4 microm). In the unfiltered samples, delta(18)O and delta(15)N values of nitrate decreased during incubation. In addition, archaeal ammonia monooxygenase subunit A (amoA) genes, which participate in the oxidation of ammonia, were found in the throughfall samples, although betaproteobacterial amoA genes were not detected. The amoA genes recovered from the leaf surface of C. japonica were also from archaea. Conversely, nitrate production, decreased isotope ratios of nitrate, and the presence of amoA genes was not observed in rainfall samples collected from an open area. Thus, the microbial nitrification that occurred in the incubated throughfall is likely due to ammonia-oxidizing archaea that were washed off the tree canopy by precipitation. FAU - Watanabe, Keiji AU - Watanabe K AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan ; Center for Environmental Science in Saitama, Kazo, Saitama 347-0115 Japan. FAU - Kohzu, Ayato AU - Kohzu A AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Suda, Wataru AU - Suda W AD - Graduate School of Frontier Science, The University of Tokyo, Kashiwa, Chiba 277-8562 Japan. FAU - Yamamura, Shigeki AU - Yamamura S AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Takamatsu, Takejiro AU - Takamatsu T AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Takenaka, Akio AU - Takenaka A AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Koshikawa, Masami Kanao AU - Koshikawa MK AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Hayashi, Seiji AU - Hayashi S AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. FAU - Watanabe, Mirai AU - Watanabe M AD - National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 Japan. LA - eng PT - Journal Article DEP - 20160917 PL - Switzerland TA - Springerplus JT - SpringerPlus JID - 101597967 PMC - PMC5026986 OTO - NOTNLM OT - Ammonia-oxidizing archaea OT - Nitrification OT - Phyllosphere OT - Throughfall OT - amoA EDAT- 2016/09/22 06:00 MHDA- 2016/09/22 06:01 PMCR- 2016/09/17 CRDT- 2016/09/22 06:00 PHST- 2015/07/06 00:00 [received] PHST- 2016/09/11 00:00 [accepted] PHST- 2016/09/22 06:00 [entrez] PHST- 2016/09/22 06:00 [pubmed] PHST- 2016/09/22 06:01 [medline] PHST- 2016/09/17 00:00 [pmc-release] AID - 3286 [pii] AID - 10.1186/s40064-016-3286-y [doi] PST - epublish SO - Springerplus. 2016 Sep 17;5(1):1596. doi: 10.1186/s40064-016-3286-y. eCollection 2016.