• 한국작물학회지
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• 제25권2호
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• pp.38-48
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• 1980

산성토양에 적응할 수 있는 계통으로 캐나다에서 육성보급된 알팔파 근류균 Rhizobium meliloti BALSAC과 일반적으로 알팔파 재배용으로 사용되고 있는 보통 근류균이 알팔파 뿌리혹 형성과 생장에 미치는 효과를 비교하기 위하여 pH 5.4정도의 산성토양을 석회시용으로 pH를 5.9, 6.4로 교정한 뒤 몇가지 종자처리 즉 무처리, 무처리+N시용, 근류균접종, 근류균 접종+석회피복으로써 초자실에서 2개월간 포트시험하여 얻은 결과를 요약하면, 1. 알팔파의 건물량 생산에는 두 근류균계통간에 차이가 없었으나 뿌리혹 형성에 있어서는 Balsac 계통의 효과가 인정되있다. 2. 석회시용으로써 식물체와 뿌리혹의 건물중 및 뿌리혹수가 증가되었으며 뿌리혹의 증가는 주로 측생근에서의 뿌리혹수 증가에 기인하였다. 3. 근류균을 접종하지 않고 질소비료만을 시용함으로써 뿌리혹을 형성한 개체비율, 뿌리혹의 건물중 및 전체뿌리혹수에 대한 굵은 뿌리혹의 상대적 비율이 증가되었다. 4. 상업적으로 생산된 근류균의 종자처리 효과는 일정한 경향을 나타내지 못하였다. 5. 뿌리혹과 관련된 형질조사에서는 상대적으로 그 변이계수가 컸으며 그 변이를 감소시키고 추정치에 대한 신뢰도를 높이기 위해서는 특별한 고려가 있어야 할 것으로 보였다.

• Bulletin of the Korean Chemical Society
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• 제27권6호
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• pp.921-924
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• 2006

• Bulletin of the Korean Chemical Society
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• 제29권1호
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• pp.228-230
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• 2008

• 미생물학회지
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• 제24권2호
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• pp.127-132
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• 1986

Soybean nodule extract was prepared and tested for the effectiveness in the induction of asymbiotic nitrogen fixation of R. japonicum P-168. A Asymbiotic nitrogenase activity was increased over twice when glutamate was replaced by nodule extract in the induction media. Independently of the induction media, the nitrogenase activity in the assay media was also enhanced by the addition of nodule extract ($100-400{\mu}g$ protein/ml). The amount of ethylene in the assay media reached the highest point after 8 days incubation of R-168 and was decreased thereafter. The growth of R. japonicum R-168 was sensitive to the concentration of nodule extract. As a while, the effect of soybean root extract was not detected both in the induction of nitrogenase activity and in the growth of R. japonicum R-168.

• Journal of Microbiology and Biotechnology
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• 제15권4호
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• pp.903-908
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• 2005

Inoculation of the carrier-based mixed bioinoculants af N-fixer (Azospirillum lipoferum strain Az204/Rhizobium strain BMBS P47) and phosphate-solubilizing bacterium (Bacillus megaterium var phosphaticum strain Pb 1) promoted growth and yield of pearl millet and blackgram under pot-culture conditions. The mixed inoculant of Az204 and Pb 1 enhanced germination, seedling vigor, plant height, and seed weight, and resulted in $6\%$ increase in grain yield of pearl millet. Likewise, the mixed inoculant of BMBS P47 and Pb1 increased growth, nodulation, and yield in blackgram. The rhizosphere soil enzyme activities, including nitrogenase, urease, and phosphatase, in both pearl millet and blackgram were significantly increased by the inoculation of the mixed inoculant, compared to that of the individual inoculants. The results clearly indicate the beneficial effect of co-culturing the N-fixer and P-solubilizer in inoculants production.

• Journal of Microbiology and Biotechnology
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• 제11권3호
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• pp.463-468
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• 2001

Cyclosophoraoses are a class of unbranced cyclic-(1longrightarrow2)-${\beta}$-D-glucans found in the Rhizobium species. Their unique cyclic structures and high solubility make them potent for inclusion complexation as a host for an insoluble guest molecule. A family of neutral cyclosophoraoses (DP 17-27) isolated from Rhizobium meliloti 2011 was used as a host for inclusion complexation with an insoluble guest drug, indomethacin. A high performance liquid chromatographic analysis indicated that the inclusion complexation of cyclosophoraoses greatly ehanced the solubility of indomethacin compared with ${\beta}$-cyclodextrin. The estimated value of the association constant of the complex in water for $\beta$-cyclodextrin and cyclosophoraoses was $523M^{-1} and 17,570M^{-1}$, respectively. NMR spectroscopy showed that the inclusion complex was characterized by the interaction of the indole ring moiety of indomethacin with the cavity of cyclosophoraoses.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.182-195
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• 2000

Indigenous bacteria from poplar roots (Populus mnadensis var. eugenei, 'Imperial Carolina') and Southern Californian shrub rhizospheres as well as two tree-colonizing Rhizobium strains (ATCC 10320 and 35645) were genetically engineered to express constitutively and stably toluene o-monooxygenase (TOM) from Burkholderia cepacia G4 by integrating the torn locus into the chromosome. The poplar and Rhizobium recombinants degraded trichloroethylene (TCE) at 0.8-2.1 nmol/min.mg protein (initial TCE concentration, 10u M) and competitive against the unengineered hosts in wheat and barley rhizospheres for one month (colonization at 1-23 $\times$ 10$^{5}$ CFU/cm root). In addition, six of these recombinants colonized poplar roots stably and competitively with populations as high as 79 $\pm$ 12% of all rhizosphere bacteria after 28 days (0.2-31 $\times$ 10$^{5}$ CFU/cm root). Furthermore, five of the most-competitive poplar recombinants (e.g., Pb3-1 and Pb5-1 which were identified as Pseudomonas PsK) retained the ability to express TOM for 29 days as 100 $\pm$ 0% of the recombinants detected in the poplar rhizosphere had constitutive expression of TOM.

• Journal of Plant Biotechnology
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• 제43권1호
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• pp.37-48
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• 2016

The transcriptional profiles of 'Tamnara' grapevine (Vitis labruscana L.) to Rhizobium vitis were determined using 12,000 gene oligonucleotide microarray chips constructed with 6,776 unigenes based on the EST sequencing. Among them, 95 clones were up-regulated more than three times and 90 were down-regulated more than 5-times in the R. vitis-inoculated grapevines relative to the control vines. Treatment of salicylic acid showed that 337 clones were upregulated and 52 clones were down regulated in grapevines. Microarray analysis, reverse transcription-polymer chain reaction, and slot blot hybridization analysis revealed that 5, 14, and 64 clones were up-regulated and 10, 12, and 61 clones were down-regulated in wounded, salicylic acid-treated, and R. vitis-inoculated 'Tamnara' grapevine leaves, respectively. The expression patterns of ${\beta}$-1,3-glucanase, proline-rich protein, and lipoxygenase genes of 'Tamnara' moderately resistant to R. vitis were similar to those of resistant 'Concord' and 'Delaware' grapevines. However, chalcone synthase genes in 'Tamnara' grapevines showed similar expression patterns to susceptible grapevines 'Neomuscat' and 'Rizamat'. Further expression studies with various clones for each gene should be conducted to elucidate their roles in resistant responses against pathogens or other stimuli in grapevines. These results could provide better resources for understanding the mechanism of defense responses against crown gall disease and clues for identifying new genes that may play a role in defense against R. vitis in grapevines.

• Journal of Microbiology and Biotechnology
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• 제25권8호
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• pp.1241-1245
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• 2015

The aim of the present work was to examine the putative promoter region of the operon ansPAB and to determine the general elements required for the regulation of transcriptional activity. The transcriptional start site of the ansPAB promoter was determined by using highresolution S1-nuclease mapping. Sequence analysis of this region showed -10 and -35 elements, which were consistent with consensus sequences for R. etli promoters that are recognized by the major form of RNA polymerase containing the σ⁷⁰ transcription factor. Mutation studies affecting several regions located upstream of the transcriptional start site confirmed the importance of these elements on transcriptional expression.

• Current Research on Agriculture and Life Sciences
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• 제4권
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• pp.27-35
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• 1986

Rhizobium의 Nitrogenase 생성요인(生成要因)과 감염기작(感染機作)을 구명(究明)하고 배양세포(培養細胞)와 Rhizobia의 혼합배양(混合培養)에서 질양고정계(窒養固定係)를 확립(確立)하기 위(爲)하여 황금(黃金), 남천(南川), D68-0099등(等) 세 품종(品種)을 조직배양(組織培養)한 결과(結果)는 다음과 같다. Callus 형성능(形成能)은 배(胚)와 유근(幼根)에서는 양호(良好)하나 배축(胚軸)에서는 전혀 없었으며 2mg/${\ell}$ 2,4-D, 4mg/${\ell}$ NAA에서 가장 양호(良好)하고 2,4-D/Kinetin 조합농도(組合濃度)에서는 0.2mg(2,4-D)/${\ell}$과 0.05mg(Kinetin)/${\ell}$에서 가장 이상적(理想的)이었다. 배양세포(培養細胞)의 성장(成長)에는 2,4-D 2mg/${\ell}$와 2,4-D (0.2mg/${\ell}$)/Kinetin(0.05mg/${\ell}$)일 때가 가장 양호(良好)하며 R. japonicum 019, 011을 접종(接種)하였을때 배양세포(培養細胞)의 성장(成長)은 상당히 둔화되었다. 단일(單一) 아미노산은 배양세포(培養細胞)의 성장(成長)을 저해(沮害) 하였는데 황금(黃金)의 경우 Methionine, Leucine에서 저해(沮害)가 가장 컷으며 다른 아미노산의 첨가(添加)로 저해작용(沮害作用)이 상당히 회복되었다. 부정근(不定根)의 생성(生成)은 2,4-D 2.0mg/${\ell}$에서나 0.2mg/${\ell}$ 2, 4-D/0.05mg/${\ell}$ Kinetin에서 양호(良好)하였다. 배양세포(培養細胞)-Rhizobium의 친화(親和)에 의(依)한 질소고정력(窒素固定力)은 25개(個) 사용(使用) 균주중(菌株中)에서 황금(黃金)에서는 10개(個) 균주(菌株), 남천(南川)에서는 7개(個) 균주(菌株)에서 나타났으며 D68-0099에서는 전혀 나타나지 않았으며 황금(黃金)의 경우(境遇) 85-HG-1 019, 007, 남천(南川)에서는 007, 119등(等)이 높은 활성(活性)을 나타내었다.