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RISS 인기검색어
- 검색키워드
- 저자 : Munusamy Madhaiyan (검색결과 57 건)
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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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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, 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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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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