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- 저자 : ( Madhaiyan ) (검색결과 110 건)
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Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Lee, Jung-Sook,Lee, Keun-Chul,Saravanan, Venkatakrishnan Sivaraj,Santhanakrishnan, Palani Microbiology Society 2010 International journal of systematic and evolutiona Vol.60 No.7
<P><I>Microbacterium</I> strain AI-S262<SUP>T</SUP> was isolated from the rhizoplane of neem seedlings in the Botanical garden of Tamilnadu Agricultural University, Coimbatore, India, and subjected to phenotypic, chemotaxonomic and genetic characterization. Cells of this strain were Gram-stain-positive, motile, non-spore-forming, short rods and formed light-yellow-pigmented colonies on nutrient agar. Strain AI-S262<SUP>T</SUP> contained MK-12 and MK-13 as the main respiratory quinones, anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0 as the predominant fatty acids, peptidoglycan-type B2<I>β</I> with glycolyl residues, and had a DNA G+C content of 69.5 mol%. A phylogenetic analysis based on 16S rRNA gene sequences showed 98.0-98.6 % pair-wise similarity with respect to close relatives in the genus <I>Microbacterium</I>. DNA-DNA hybridization experiments revealed a low level of DNA-DNA relatedness (less than 39%) between strain AI-S262<SUP>T</SUP> and its closest relatives. Data from DNA-DNA hybridization and phenotypic analyses supported the conclusion that strain AI-S262<SUP>T</SUP> represents a novel species in the genus <I>Microbacterium</I>, for which the name <I>Microbacterium azadirachtae</I> sp. nov. is proposed. The type strain is AI-S262<SUP>T</SUP> (=JCM 15681<SUP>T</SUP> =LMG 24772<SUP>T</SUP> =KCTC 19668<SUP>T</SUP>).</P>
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Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Senthilkumar, Murugaiyan,Lee, Jung-Sook,Lee, Keun-Chul Microbiology Society 2012 International journal of systematic and evolutiona Vol.62 No.1
<P>A pink, aerobic, facultatively methylotrophic, motile, Gram-negative rod, designated Gh-105<SUP>T</SUP>, was isolated from the phyllosphere of cotton from Coimbatore (Tamilnadu, India). 16S rRNA gene sequence analysis showed clearly that the isolate belonged to the <I>Methylobacterium</I> cluster. Strain Gh-105<SUP>T</SUP> was most closely related to <I>Methylobacterium adhaesivum</I> AR27<SUP>T</SUP> (99 % 16S rRNA gene sequence similarity) and <I>Methylobacterium iners</I> 5317S-33<SUP>T</SUP> (97.5 %). The isolate grew with C1 compounds such as methanol and dichloromethane, but not with formaldehyde, formate, methylamine, trimethylamine or methane, as sole carbon sources and carried <I>mxaF</I>, which encodes methanol dehydrogenase and supports methylotrophic metabolism. The major fatty acid was C18 : 1ω7<I>c</I> and the G+C content of the genomic DNA was 64.2 mol%. Physiological and biochemical data and DNA-DNA relatedness with <I>M. adhaesivum</I> KACC 12195<SUP>T</SUP> and <I>M. iners</I> KACC 11765<SUP>T</SUP> revealed clear phenotypic and genotypic differences. For this reason, we propose that strain Gh-105<SUP>T</SUP> ( = CCM 7572<SUP>T</SUP> = NRRL B-51692<SUP>T</SUP>) represents the type strain of a novel species, with the name <I>Methylobacterium gossipiicola</I> sp. nov.</P>
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Leifsonia soli sp. nov., a yellow-pigmented actinobacterium isolated from teak rhizosphere soil
Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Lee, Jung-Sook,Senthilkumar, Murugaiyan,Lee, Keun Chul,Sundaram, Subbiah Microbiology Society 2010 International journal of systematic and evolutiona Vol.60 No.6
<P>Two yellow-pigmented, Gram-stain-positive, aerobic, motile, short rod-shaped bacteria were isolated from natural teak tree rhizosphere soil and their taxonomic positions were determined by using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strains TG-S248<SUP>T</SUP> and TG-S240 formed a distinct phyletic line within the genus <I>Leifsonia</I>. 16S rRNA gene sequence analysis of strain TG-S248<SUP>T</SUP> with sequences from <I>Leifsonia shinshuensis</I> DB 102<SUP>T</SUP>, <I>L. poae</I> VKM Ac-1401<SUP>T</SUP>, <I>L. naganoensis</I> DB 103<SUP>T</SUP>, <I>L. aquatica</I> DSM 20146<SUP>T</SUP> and <I>L. xyli</I> subsp. <I>cynodontis</I> JCM 9733<SUP>T</SUP> revealed pairwise similarities ranging from 98.7 to 99.1 %. The major fatty acids were anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0. The G+C content of the DNA of the type strain was 69.4 mol%. DNA-DNA hybridization experiments revealed low levels of DNA-DNA relatedness (32 % or less) between strain TG-S248<SUP>T</SUP> and its closest relatives. Based on differences in phenotypic and genotypic characteristics, strain TG-S248<SUP>T</SUP> (=LMG 24767<SUP>T</SUP> =JCM 15679<SUP>T</SUP>) is designated the type strain of a novel species of the genus <I>Leifsonia</I>, for which the name <I>Leifsonia soli</I> sp. nov. is proposed.</P>
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Madhaiyan, Munusamy,Kim, Byung-Yong,Poonguzhali, Selvaraj,Kwon, Soon-Wo,Song, Myung-Hee,Ryu, Jeoung-Hyun,Go, Seung-Joo,Koo, Bon-Sung,Sa, Tong-Min Microbiology Society 2007 International journal of systematic and evolutiona Vol.57 No.2
<P>A pink-pigmented, facultatively methylotrophic bacterium, strain CBMB20T, isolated from stem tissues of rice, was analysed by a polyphasic approach. Strain CBMB20T utilized 1-aminocyclopropane 1-carboxylate (ACC) as a nitrogen source and produced ACC deaminase. It was related phylogenetically to members of the genus Methylobacterium. 16S rRNA gene sequence analysis indicated that strain CBMB20T was most closely related to Methylobacterium fujisawaense, Methylobacterium radiotolerans and Methylobacterium mesophilicum; however, DNA-DNA hybridization values were less than 70 % with the type strains of these species. The DNA G+C content of strain CBMB20T was 70.6 mol%. The study presents a detailed phenotypic characterization of strain CBMB20T that allows its differentiation from other Methylobacterium species. In addition, strain CBMB20T is the only known member of the genus Methylobacterium to be described from the phyllosphere of rice. Based on the data presented, strain CBMB20T represents a novel species in the genus Methylobacterium, for which the name Methylobacterium oryzae sp. nov. is proposed, with strain CBMB20T (=DSM 18207T=LMG 23582T=KACC 11585T) as the type strain.</P>
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Madhaiyan, M,Poonguzhali, S,Senthilkumar, M,Pragatheswari, D,Lee, K-C,Lee, J-S N.V. Swets en Zeitlinger 2013 Antonie van Leeuwenhoek Vol.103 No.3
<P>A novel plant-associated obligate methylotrophic bacterium, designated strain Ca-68(T), was isolated from the rhizosphere soil of field-grown red pepper from India. The isolates are strictly aerobic, Gram negative, motile rods multiplying by binary fission and formaldehyde is assimilated via the ribulose monophosphate pathway. A comparative 16S rRNA gene sequence-based phylogenetic analysis placed the strain in a clade with the species Methylobacillus flagellatus, Methylobacillus glycogens and Methylobacillus pratensis, with which it showed pairwise similarity of 97.8, 97.4 and 96.2 %, respectively. The major fatty acids are C(16:0), C(10:0) 3OH and C(16:1) ω7c. The G+C content of the genomic DNA is 59.7 mol%. The major ubiquinone is Q-8. Dominant phospholipids are phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. Based on 16S rRNA gene sequence analysis and DNA-DNA relatedness (14-19 %) with type strains of the genus Methylobacillus, the novel isolate was classified as a new species of this genus and named Methylobacillus rhizosphaerae Ca-68(T) (=KCTC 22383(T) = NCIMB 14472(T)).</P>
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Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Lee, Jung-Sook,Lee, Keun Chul,Sundaram, Subbiah Microbiology Society 2010 International journal of systematic and evolutiona Vol.60 No.9
<P>An aerobic, yellow-pigmented, facultatively methylotrophic, Gram-staining-negative, non-spore-forming bacterium, designated strain Gm-149<SUP>T</SUP>, was isolated from the rhizosphere of cultivated soybean in India. Cells were motile by gliding. The predominant cellular fatty acids were iso-C15 : 0, summed feature 3 (comprising iso-C15 : 0 2-OH and/or C16 : 1<I>ω</I>7<I>c</I>), C16 : 0 3-OH and anteiso-C15 : 0, and the major isoprenoid quinone was MK-6. The G+C content of the genomic DNA of strain Gm-149<SUP>T</SUP> was 35.6 mol%. Comparative 16S rRNA gene sequence analysis showed that strain Gm-149<SUP>T</SUP> formed a distinct phyletic line within the genus <I>Flavobacterium</I>. Based on levels of pairwise 16S rRNA gene sequence similarity, strain Gm-149<SUP>T</SUP> was related most closely to the type strain of <I>Flavobacterium daejeonense</I> (97.1 %), but the level of DNA-DNA relatedness between these two strains was about 11.2 %. On the basis of phenotypic and genotypic data, strain Gm-149<SUP>T</SUP> is considered to represent a novel species of the genus <I>Flavobacterium</I>, for which the name <I>Flavobacterium glycines</I> sp. nov. is proposed. The type strain is Gm-149<SUP>T</SUP> (=ICMP 17618<SUP>T</SUP>=NBRC 105008<SUP>T</SUP>).</P>
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Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Senthilkumar, Murugaiyan,Pragatheswari, Dhandapani,Lee, Jung-Sook,Lee, Keun-Chul International Union of Microbiological Societies 2015 International journal of systematic and evolutiona Vol.65 No.2
<P>Three novel bacterial strains, designated Vu-144<SUP>T</SUP>, Vu-7 and Vu-35, were isolated on minimal medium from rhizosphere soil of field-grown cowpea and subjected to a taxonomic study using a polyphasic approach. Cells of the strains were Gram-stain-negative, non-motile, non-spore-forming, coccoid rods, and formed non-pigmented colonies. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain Vu-144<SUP>T</SUP> was affiliated with an uncultivated lineage of the phylum <I>Bacteroidetes</I>. Its closest phylogenetic neighbour was the recently described species <I>Niastella populi</I>, a member of the family <I>Chitinophagaceae</I>, with just 90.7 % sequence similarity to the type strain. The only isoprenoid quinone detected was menaquinone 7 (MK-7). The fatty acid profiles showed large amounts of iso-C<SUB>15 : 0</SUB>, iso-C<SUB>17 : 0</SUB> 3-OH and iso-C<SUB>15 : 1</SUB> G and minor amounts of summed feature 3 (C<SUB>16 : 1</SUB>ω7<I>c</I> and/or iso-C<SUB>15 : 0</SUB> 2-OH), C<SUB>16 : 0</SUB> and other fatty acids, allowing the differentiation of the strains from other genera. The G+C content of the genomic DNA of the three strains ranged from 43.1 to 44.3 mol%. In addition to phosphatidylethanolamine, the major polar lipids were three unidentified aminophospholipids (APL1–APL3), two unidentified phospholipids (PL1, PL2) and three unidentified lipids (UL1–UL3). Biochemical test patterns also differed from those of <I>Niastella populi</I> and members of other genera. All three isolates showed plant-growth-promoting properties, e.g. the ability to produce indole-3-acetic acid and NH<SUB>3</SUB> and to solubilize phosphate, utilized 1-aminocyclopropane 1-carboxylate (ACC) as a sole source of nitrogen and possessed the ACC deaminase enzyme. The novel isolates readily colonized roots and stimulated growth of tomato and cowpea under glasshouse conditions. Inoculated plants showed a 45–60 % increase in dry matter weight with respect to uninoculated controls. On the basis of the evidence from our polyphasic study, isolate Vu-144<SUP>T</SUP> represents a novel genus and species in the family <I>Chitinophagaceae</I>, for which the name <I>Arachidicoccus rhizosphaerae</I> gen. nov., sp. nov. is proposed. The type strain of <I>Arachidicoccus rhizosphaerae</I> is Vu-144<SUP>T</SUP> ( = KCTC 22378<SUP>T</SUP> = NCIMB 14473<SUP>T</SUP>).</P>
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