Faculty Profiles - ASAKAWA, Susumu

Papers - ASAKAWA, Susumu

Division display 101 - 120 of about 175 ／ All the affair displays >>

Survey of major capsid genes (g23) of T4-type bacteriophagesin rice fields in Northeast China Reviewed International coauthorship

Guanghua Wang, Jian Jin, Susumu Asakawa, Makoto Kimura

Soil Biol. Biochem. Vol. 41 page： 423 - 427 2009.2

Frequency of phage-infected bacterial cells in the floodwater of a Japanese paddy field Reviewed

Natsuko Nakayama, Susumu Asakawa, Makoto Kimura

Soil Biol. Biochem. Vol. 41 page： 186 - 191 2009.2

Survey of major capsid genes (g23) of T4-type bacteriophages in Japanese paddy field soils Reviewed International coauthorship

Guanghua Wang, Motoki Hayashi, Masato Saito, Kazunari Tsuchiya , Susumu Asakawa, Makoto Kimura

Soil Biol. Biochem. Vol. 41 page： 13 - 20 2009.1

部門別進歩総説，第３部門　土壌生物，土壌生物 Reviewed

浅川晋・鮫島玲子・齋藤明広・橋本知義

日本土壌肥料学雑誌 Vol. 76 ( 6(部門別進歩総説特集号) ) page： 557 - 560 2008.12

*Identification of the gene for disaggregatase from Methanosarcina mazei Reviewed

Naoki Osumi, Yoshihiro Kakehashi, Shiho Matsumoto, Kazunari Nagaoka, Junich Sakai, Kiyotaka Miyashita, Makoto Kimura, Susumu Asakawa

Archaea Vol. 2 page： 185 - 191 2008.12

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

The gene sequences encoding disaggregatase
(Dag), the enzyme responsible for dispersion of cell aggregates
of Methanosarcina mazei to single cells, were determined
for three strains of M. mazei (S-6T, LYC and TMA). The
dag genes of the three strains were 3234 bp in length and had almost
the same sequences with 97% amino acid sequence identities.
Dagwas predicted to comprise 1077 amino acid residues
and to have a molecular mass of 120 kDa containing three repeats
of the DNRLRE domain in the C terminus, which is specific
to the genus Methanosarcina and may be responsible for
structural organization and cell wall function. Recombinant
Dag was overexpressed in Escherichia coli and preparations
of the expressed protein exhibited enzymatic activity. The
RT-PCR analysis showed that dagwas transcribed tomRNAin
M. mazei LYC and indicated that the gene was expressed in
vivo. This is the first time the gene involved in the morphological
change of Methanosarcina spp. from aggregate to single
cells has been identified.

Bacterial communities in iron mottles in the plow pan layer of a Japanese rice field: estimation using PCR-DGGE and sequencing analyses Reviewed International coauthorship

Vita Ratri Cahyani, Jun Murase, Eiji Ishibasi, Susumu Asakawa, and Makoto Kimura

Soil Sci.Plant Nutr. Vol. 54 page： 711 - 717 2008.10

Distribution of Archaea in Japanese patients with periodontitis and humoral immune response to the components Reviewed

Kokoro Yamabe, Hiroshi Maeda, Susumu Kokeguchi, Ichiro Tanimoto, Norihiro Sonoi, Susumu Asakawa, Shogo Takashiba

FEMS Microbiol. Lett. Vol. 287 page： 69 - 75 2008.10

水田における微生物の機能と群集構造 Invited

浅川晋

バイオサイエンスとインダストリー Vol. 66 ( 9 ) page： 482 - 487 2008.9

白鳥神社と水田農業（追補）ー愛知県旧作手村（現新城市作手地区）の白鳥神社と水田稲作の関わりについてー

浅川晋，木村眞人，小野信一

農業と科学 Vol. 598 page： 11 - 14 2008.6

*Comparison of bacterial community structures at main habitats in paddy field ecosystem based on DGGE analysis Reviewed

Susumu Asakawa and Makoto Kimura

Soil Biol. Biochem. Vol. 40 page： 1322 - 1329 2008.6

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

Bacterial communities at different habitats in a Japanese paddy field ecosystem were compared to understand the bacterial world in the
ecosystem as a whole by analyzing data of the denaturing gradient gel electrophoresis (DGGE) band patterns and the sequenced DGGE
bands. The habitats were floodwater, percolating water, microcrustacean inhabiting in floodwater, plow layer soil, rice roots, rice straw
and rice straw compost incorporated in soil, rice straw placed on the soil surface, plant residues in paddy fields, and rice straw under
composting process. Phylotype (band) richness, diversity, evenness, and stability of the bacterial communities at the respective habitats
were evaluated based on the DGGE profile data. Phylotype richness was greater near plant residues, rice straw buried in soil and rice
straw placed on soil surface, while it was smaller at microcrustacean and rice straw compost buried in soil. The samples from plow layer
soil and rice straw compost buried in soil showed considerably higher index values for diversity, evenness, and stability, while those from
rice straw placed on soil surface and microcrustacean had lower values of the indices than other habitats. Sequences of totally 250 DGGE
bands were assigned to phyla or classes. Distribution of bacterial members to phylogenetic taxa was different among the respective
habitats. Inhabitants in plow layer soil were most widely distributed among the groups (nine phyla: Proteobacteria, Chloroflexi,
Chlorobi, Verrucomicrobia, Acidobacteria, Nitrospira, candidate division OP10, Cyanobacteria, and Actinobacteria), while those in
floodwater and microcrustacean were restricted to only three phyla (Proteobacteria, Bacteroidetes, and Actinobacteria). Proteobacteria
and Bacteroidetes were found at all the habitats and the habitats except for plow layer soil, respectively, whereas abundant members
belonged to Chloroflexi and Actinobacteria in plow layer soil. ``Comprehensive mapping'' of DGGE f

Novel capsid genes (g23) of T4-type bacteriophages in a Japanese paddy field Reviewed

Takeshi Fujii, Natsuko Nakayama, Mizuhiko Nishida, Hiroyuki Sekiya, Naoto Kato, Susumu Asakawa, and Makoto Kimura

Soil Biol. Biochem. Vol. 40 page： 1049 - 1059 2008.5

Cyanobacterial communities of rice straw left on the soil surface of a paddy field Reviewed

Naoko Asari, Rie Ishihara, Yasunori Nakajima, Makoto Kimura, and Susumu Asakawa

Biol. Fertil. Soils Vol. 44 page： 605 - 612 2008.4

Eukaryotic communities associated with the decomposition of rice straw compost in a Japanese rice paddy field estimated by DGGE analysis Reviewed

Masashi Hatamoto, Takanori Tanahashi, Jun Murase, Kazuo Matsuya, Motoki Hayashi, Makoto Kimura, and Susumu Asakawa

Biol. Fertil. Soils Vol. 44 page： 527 - 532 2008.2

Viral ecology in soil: past, present, and future perspectives Reviewed International coauthorship

Makoto Kimura, Zhongjun Jia, Natsuko Nakayama, and Susumu Asakawa

Soil Sci.Plant Nutr Vol. 54 page： 1 - 32 2008.1

Morphological analysis of viral communities in the floodwater of a Japanese paddy field Reviewed

Natsuko Nakayama, Mami Okumura, Katsuhiro Inoue, Susumu Asakawa, and Makoto Kimura

Soil Biol. Biochem Vol. 39 page： 3187 - 3190 2007.12

Molecular characterization of methane-oxidizing bacteria associated with rice straw decomposition in a rice field Reviewed International coauthorship

Zhongjun Jia, Atsuo Sugano, Naoko Asari, Cho Cho Tun, Rie Ishihara, Susumu Asakawa, and Makoto Kimura

Soil Sci.Plant Nutr Vol. 53 page： 729 - 739 2007.12

Dynamics of methanogenic archaeal communities based on rRNA analysis and their relation to methanogenic activity in Japanese paddy field soils Reviewed

Takeshi Watanabe, Makoto Kimura, and Susumu Asakawa

Soil Biol. Biochem Vol. 39 page： 2877-2887 2007.11

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

We investigated the relationships between dynamics of methanogenic archaeal communities and methanogenic activities in Japanese paddy ﬁeld soils by reverse transcription-PCR-denaturing gradient gel electrophoresis (RT-PCR-DGGE)and real-time PCR targeting 16S rRNA gene (16S rDNA)and 16S rRNA.The investigated paddy ﬁelds were managed on a double-cropping system,where rice was cultivated under ﬂooded conditions in summer and wheat was cropped after drainage in winter under drained conditions. Methanogenic archaeal 16S rRNAs were retrieved from all collected soil samples even under drained conditions by RT-PCR.DGGE band patterns from methanogenic archaeal 16S rRNAs were stable throughout the year and were similar to the patterns from their 16S rDNAs.The ratio of 16S rRNAs per one 16S rDNA fragment ﬂuctuated between 9.4 and 1.2 103 and increased during rice cultivations although contrary results were also obtained in some investigated plots.Methanogenic activities under ﬂooded conditions were higher than those under drained conditions. These results suggested that activities of methanogenic archaeal communities ﬂuctuated in a year depending on soil conditions.

Molecular analysis of biodegradable plastics decomposers in two Japanese soils Reviewed

Masahiro Kamiya, Susumu Asakawa, and Makoto Kimura

Soil Sci.Plant Nutr Vol. 53 page： 568 - 574 2007.10

Abundance of bacteriophages of common heterotrophic bacteria in the floodwater of a Japanese paddy field Reviewed

Natsuko Nakayama, Mami Okumura, Katsuhiro Inoue, Susumu Asakawa and Makoto Kimura

Soil Sci.Plant Nutr Vol. 53 page： 595 - 605 2007.10

Succession and phylogenetic profile of eukaryotic communities in rice straw incorporated into a rice field: estimation by PCR-DGGE and sequence analyses Reviewed International coauthorship

Atsuo Sugano, Hidetaka Tsuchimoto, Tun Cho Cho, Susumu Asakawa, and Makoto Kimura

Soil Sci.Plant Nutr Vol. 53 page： 585 - 594 2007.10

　 PREV - NEXT 　

<ASAKAWA, Susumu>

Papers - ASAKAWA, Susumu