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RISS 인기검색어
- 검색키워드
- 저자 : ( R. Anandham ) (검색결과 22 건)
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Krishnamoorthy, R.,Kim, K.,Subramanian, P.,Senthilkumar, M.,Anandham, R.,Sa, T. Elsevier 2016 Agriculture, ecosystems & environment Vol.231 No.-
Arbuscular mycorrhizal fungi (AMF) have close association with bacteria in establishing a tripartite interaction with plants. The objective of this study was to assess the tripartite interactions among AMF, associated bacteria and maize on enhancing salt stress tolerance. AMF spores isolated from coastal reclamation land were identified as Rhizophagus intraradices and multiplied using monosporic mass culturing. From surface-decontaminated spores of R. intraradices, isolation of associated bacteria was carried out and the obtained isolate was identified as Massilia sp. RK4. The isolated bacterial strain was found to possess several plant growth promoting characteristics and for further studies, its effect on maize plant growth in coastal reclamation soil was evaluated under three different salt concentrations. Salt stress substantially reduced plant growth, root colonization and spore-producing ability of the R. intraradices. However, treatment with the AMF and a combination of AMF and associated bacteria alleviated the salt-induced reduction of plant growth, root colonization, nutrient accumulation and lowered leaf proline levels compared to control treatment. The co-inoculation of R. intraradices and Massilia sp. RK4 exhibited significant impact on AMF root colonization and nutrient accumulation in plants compared to inoculation with R. intraradices only. Inoculation of R. intraradices and Massilia sp. RK4 improved the salinity tolerance of maize through the dual effect exerted by AMF and its associated bacteria.
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( R. Anandham ),( P. Indiragandhi ),( M. Madhaiyan ),( Jong Bae Chung ),( Kyoung Yul Ryu ),( Hyeong Jin Jee ),( Tong Min Sa ) 한국미생물생명공학회 2009 Journal of Microbiology and Biotechnology Vol.19 No.1
The mixotrophic growth with methanol plus thiosulfate was examined in nutrient-limited mixotrophic condition for Methylobacterium goesingense CBMB5 and Methylobacterium fujisawaense CBMB37. Thiosulfate oxidation increased the growth and protein yield in mixotrophic medium that contained 150mM methanol and 20mM sodium thiosulfate, at 144 h. Respirometric study revealed that thiosulfate was the most preferable reduced inorganic sulfur source, followed by sulfite and sulfur. M. goesingense CBMB5 and M. fujisawaense CBMB37 oxidized thiosulfate directly to sulfate, and intermediate products of thiosulfate oxidation such as polythionates, sulfite, and sulfur were not detected in spent medium and they did not yield positive amplification for tested soxB primers. Enzymes of thiosulfate oxidation such as rhodanese and sulfite oxidase activities were detected in cell-free extracts of M. goesingense CBMB5, and M. fujisawaense CBMB37, and thiosulfate oxidase (tetrathionate synthase) activity was not observed. It indicated that both the organisms use the non-S4 intermediate sulfur oxidation pathway for thiosulfate oxidation. It is concluded from this study that M. goesingense CBMB5, and M. fujisawaense CBMB37 exhibited mixotrophic metabolism in medium containing methanol plus thiosulfate and that thiosulfate oxidation and the presence of a Paracoccus sulfur oxidation (PSO) pathway in methylotrophic bacteria are species dependant.
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Anandham, R.,Sridar, R.,Nalayini, P.,Poonguzhali, S.,Madhaiyan, M.,sa, T. G. Fischer 2007 MICROBIOLOGICAL RESEARCH Vol.162 No.2
The use of Rhizobium inoculant for groundnut is a common practice in India. Also, co-inoculation of Rhizobium with other plant growth-promoting bacteria received considerable attention in legume growth promotion. Hence, in the present study we investigated effects of co-inoculating the sulfur (S)-oxidizing bacterial strains with Rhizobium, a strain that had no S-oxidizing potential in groundnut. Chemolithotrophic S-oxidizing bacterial isolates from different sources by enrichment isolation technique included three autotrophic (LCH, SWA5 and SWA4) and one heterotrophic (SGA6) strains. All the four isolates decreased the pH of the growth medium through oxidation of elemental S to sulfuric acid. Characterization revealed that these isolates tentatively placed into the genus Thiobacillus. Clay-based pellet formulation (2.5x10<SUP>7</SUP>cfug<SUP>-1</SUP> pellet) of the Thiobacillus strains were developed and their efficiency to promote plant growth was tested in groundnut under pot culture and field conditions with S-deficit soil. Experiments in pot culture yielded promising results on groundnut increasing the plant biomass, nodule number and dry weight, and pod yield. Co-inoculation of Thiobacillus sp. strain LCH (applied at 60kgha<SUP>-1</SUP>) with Rhizobium under field condition recorded significantly higher nodule number, nodule dry weight and plant biomass 136.9 plant<SUP>-1</SUP>, 740.0mg plant<SUP>-1</SUP> and 15.0g plant<SUP>-1</SUP>, respectively, on 80 days after sowing and enhanced the pod yield by 18%. Also inoculation of S-oxidizing bacteria increased the soil available S from 7.4 to 8.43kgha<SUP>-1</SUP>. These results suggest that inoculation of S-oxidizing bacteria along with rhizobia results in synergistic interactions promoting the yield and oil content of groundnut, in S-deficit soils.
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Dyella soli sp. nov. and Dyella terrae sp. nov., isolated from soil
Weon, H.-Y.,Anandham, R.,Kim, B.-Y.,Hong, S.-B.,Jeon, Y.-A.,Kwon, S.-W. Microbiology Society 2009 International journal of systematic and evolutiona Vol.59 No.7
<P>Two novel strains isolated from soils, JS12-10(T) and JS14-6(T), were characterized using a polyphasic approach to determine their taxonomic positions. These isolates were found to be aerobic, Gram-negative, motile with one polar flagellum, non-spore-forming and rod-shaped. Phenotypic and fatty acid data supported the affiliation of JS12-10(T) and JS14-6(T) to the genus Dyella. However, chemotaxonomic data and DNA-DNA relatedness values allowed differentiation of these strains from other Dyella species with validly published names. Strains JS12-10(T) and JS14-6(T) showed the highest 16S rRNA gene sequence similarities with Dyella ginsengisoli Gsoil 3046(T) (98.4 %) and Dyella japonica XD53(T) (97.9 %), respectively, and the 16S rRNA gene sequence similarity between them was 97.1 %. DNA-DNA hybridization values between the novel isolates and strains of other recognized Dyella species were 29-38 %. Therefore, strains JS12-10(T) and JS14-6(T) represent two novel species of the genus Dyella, for which the names Dyella soli sp. nov. (type strain JS12-10(T) =KACC 12747(T) =JCM 15423(T)) and Dyella terrae sp. nov. (type strain JS14-6(T) =KACC 12748(T) =JCM 15424(T)) are proposed.</P>
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