http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Zinc Metal Solubilization by Gluconacetobacter diazotrophicus and Induction of Pleomorphic Cells
( Saravanan ),( Venkatakrishnan Sivaraj ),( Jabez Osborne ),( Munusamy Madhaiyan ),( Lazar Mathew ),( Jong Bae Chung ),( Ki Sup Ahn ),( Tong Min Sa ) 한국미생물생명공학회 2007 Journal of microbiology and biotechnology Vol.17 No.9
Joe, Manoharan Melvin,Saravanan, Venkatakrishnan Sivaraj,Sa, Tongmin Springer-Verlag 2013 Archives of microbiology Vol.195 No.3
<P>The bacterial cell surface plays a major role in the bacterial aggregation that in turn plays a positive role in affecting the bacterial dispersion and survival in soil and their ability to adhere to plant surfaces. Plant growth-promoting Methylobacterium strains, Methylobacterium goesingense CBMB5, Methylobacterium sp. CBMB12, Methylobacterium oryzae CBMB20, Methylobacterium fujisawaense CBMB37, M. oryzae CBMB110 and Methylobacterium suomiense CBMB120 were evaluated for aggregation efficiency. Aggregation occurred in all test strains under high C/N growth conditions, and the strain CBMB12 showed the highest aggregation of 53.4?% at 72?h. Disaggregation compound treatment studies revealed the role of protein-protein interaction in Methylobacterium strains except CBMB110 and CBMB120 strains, where a possible carbohydrate-protein interaction is suspected. Surface layer protein extraction by LiCl followed by SDS-PAGE analysis showed the presence of proteins at molecular weights ranging from 41 to 49?kDa. Methylobacterium strains under aggregated conditions showed increased hydrophobicity compared to the cells under standard grown conditions. A relatively higher hydrophobicity of 50.1?% as evident by the adhesion with xylene was observed with strain CBMB12 under aggregated condition. This study reports the aggregation ability in plant growth-promoting Methylobacterium strains and the possible involvement of cellular components and hydrophobicity in this phenomenon.</P>
Kim, Ki-Yoon,Hwang, Seong-Woong,Saravanan, Venkatakrishnan Sivaraj,Sa, Tong-Min Korean Society of Soil Science and Fertilizer 2012 한국토양비료학회지 Vol.45 No.1
Salinity is one of the most relevant abiotic factor limiting crop yield and its net primary productivity. In addition, salinity induces an increased stress ethylene synthesis in plants which, in turn, exacerbate the responses to the stressor. Bacterial single or co-inoculation effect was tested using previously characterized plant growth promoting (PGP) bacteria Brevibacterium iodinum RS16 and Methylobacterium oryzae CBMB20 on maize and sorghum-sudan grass hybrid under different concentrations of NaCl. Non-inoculated maize and sorghum-sudangrass hybrid showed 33.4% and 20.0% reduction in seed germination under highest NaCl (150 mM) level tested. However, under the same NaCl concentration, co-inoculation with B. iodinum RS16 and M. oryzae CBMB20 PGP strains increased the seed germination in maize (16.7%) and sorghum-sudangrass hybrid (4.4%). In Gnotobiotic growth pouch experiments conducted for maize and sorghum-sudangrass hybrid, co-inoculation of PGP B. iodinum RS16 and M. oryzae CBMB20 mitigated the salinity stress and promoted root length by 22.9% and 29.7%, respectively. Thus the results of this study could help in development of potential bioinoculants that may be suitable for crop production under saline conditions.
Madhaiyan, Munusamy,Poonguzhali, Selvaraj,Lee, Jung-Sook,Saravanan, Venkatakrishnan Sivaraj,Lee, Keun-Chul,Santhanakrishnan, Palani Microbiology Society 2010 International journal of systematic and evolutiona Vol.60 No.7
<P>A methylotrophic nitrogen-fixing bacterial strain, Ah-143<SUP>T</SUP>, isolated from the rhizosphere soil of field-grown groundnut was analysed by a polyphasic taxonomic approach. Comparative 16S rRNA gene sequence analysis combined with <I>rpoB</I> gene sequence analysis allocated strain Ah-143<SUP>T</SUP> to the family <I>Enterobacteriaceae</I>, with <I>Enterobacter radicincitans</I> and <I>Enterobacter cowanii</I> as the closest relatives. The strain is Gram-stain-negative, non-spore-forming, aerobic and motile, having straight rod-shaped cells with a DNA G<I>+</I>C content of approximately 53.2 mol%. The strain utilizes methanol as a carbon source and the <I>mxaF</I> gene was closely related to the <I>mxaF</I> gene of members of the genus <I>Methylobacterium</I>. The fatty acid profile consisted of C16 : 0, C17 : 0 cyclo, C18 : 1<I>ω</I>7<I>c</I>, summed feature 2 (iso-C16 : 1 I and/or C14 : 0 3-OH) and summed feature 3 (iso-C15 : 0 2-OH and/or C16 : 1<I>ω</I>7<I>c</I>) as the major components. DNA-DNA relatedness of strain Ah-143<SUP>T</SUP> with its close relatives was less than 20 %. On the basis of the phylogenetic analyses, DNA-DNA hybridization data, and unique physiological and biochemical characteristics, it is proposed that the strain represents a novel species of the genus <I>Enterobacter</I> and should be named <I>Enterobacter arachidis</I> sp. nov. The type strain is Ah-143<SUP>T</SUP> (=NCIMB 14469<SUP>T</SUP> =KCTC 22375<SUP>T</SUP>).</P>
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>
Parthiban Subramanian,Manoharan Melvin Joe,임우종,홍보희,Sherlyn C. Tipayno,Venkatakrishnan Sivaraj Saravanan,유재홍,정종배,Tahera Sultana,사동민 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.4
Cold-adapted bacteria survive in extremely cold temperature conditions and exhibit various mechanisms of adaptation to sustain their regular metabolic functions. These adaptations include several physiological and metabolic changes that assist growth in a myriad of ways. Successfully sensing of the drop in temperature in these bacteria is followed by responses which include changes in the outer cell membrane to changes in the central nucleoid of the cell. Their survival is facilitated through many ways such as synthesis of cryoprotectants,cold acclimation proteins, cold shock proteins, RNA degradosomes, Antifreeze proteins and ice nucleators. Agricultural productivity in cereals and legumes under low temperature is influenced by several cold adopted bacteria including Pseudomonas, Acinetobacter, Burkholderia, Exiguobacterium, Pantoea, Rahnella,Rhodococcus and Serratia. They use plant growth promotion mechanisms including production of IAA,HCN, and ACC deaminase, phosphate solublization and biocontrol against plant pathogens such as Alternaria, Fusarium, Sclerotium, Rhizoctonia and Pythium.
Subramanian, Parthiban,Joe, Manoharan Melvin,Yim, Woo-Jong,Hong, Bo-Hui,Tipayno, Sherlyn C.,Saravanan, Venkatakrishnan Sivaraj,Yoo, Jae-Hong,Chung, Jong-Bae,Sultana, Tahera,Sa, Tong-Min Korean Society of Soil Science and Fertilizer 2011 한국토양비료학회지 Vol.44 No.4
Cold-adapted bacteria survive in extremely cold temperature conditions and exhibit various mechanisms of adaptation to sustain their regular metabolic functions. These adaptations include several physiological and metabolic changes that assist growth in a myriad of ways. Successfully sensing of the drop in temperature in these bacteria is followed by responses which include changes in the outer cell membrane to changes in the central nucleoid of the cell. Their survival is facilitated through many ways such as synthesis of cryoprotectants, cold acclimation proteins, cold shock proteins, RNA degradosomes, Antifreeze proteins and ice nucleators. Agricultural productivity in cereals and legumes under low temperature is influenced by several cold adopted bacteria including Pseudomonas, Acinetobacter, Burkholderia, Exiguobacterium, Pantoea, Rahnella, Rhodococcus and Serratia. They use plant growth promotion mechanisms including production of IAA, HCN, and ACC deaminase, phosphate solublization and biocontrol against plant pathogens such as Alternaria, Fusarium, Sclerotium, Rhizoctonia and Pythium.