• 제목/요약/키워드: psbA

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양돈 계수에서 광합성 미생물의 특성 (Characterization of Photosynthetic Bacteria in Swine Wastewater)

  • 최경민;양재경
    • 환경위생공학
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    • 제16권3호
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    • pp.28-33
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    • 2001
  • Photosynthetic bacteria (PSB), strains IP-4 and IP-6-7 were isolated from nature, and were studied for swine wastewater treatment. It was confirmed that these PSB were very effective for the COD treatment. Growth of those PSB were increased to 4.5 fold in organic-acids (acetate, propionate and butyrate) added medium than cultivation in Lascelles basal medium and the amount of bacteriochlorophyll a were increased to 5 folds. The COD removal rate in swine wastewater using PSB, strains IP-4 and IP6-7 were obtained 91% and 85%, respectively.

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엽록체 DNA psbA-trnH와 atpF-H 염기서열에 기초한 한국산 소나무속의 분자계통학적 연구 (Molecular phylogenetic study of Pinus in Korea based on chloroplast DNA psbA-trnH and atpF-H sequences data)

  • 홍정기;양종철;이유미;김주환
    • 식물분류학회지
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    • 제44권2호
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    • pp.111-118
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    • 2014
  • 엽록체 DNA atpF-H, psbA-trnH region을 마커로 활용하여 국내에 분포하는 소나무속 식물들 중 17분류군에 대한 분자계통학적 연구를 수행하여 한국산 소나무속의 계통학적 유연관계를 규명하고, 소나무속의 유연관계를 잘 나타낼 수 있는 분자마커를 찾아내고자 연구가 수행되었다. atpF-H, psbA-trnH region의 조합분석결과 한국산 소나무속은 100%의 BP로 지지되는 단계통군으로 확인되었으며, 소나무아속과 잣나무아속으로 명확히 구분되어졌다. 본 연구에서 이용된 두 개의 분자마커 중 psbA-trnH region이 atpF-H region보다 한국산 소나무속의 계통 및 유연관계를 규명하는데 다소 높은 해상력을 나타내었다.

Four Embryophyte Introns and psbB Operon Indicate Chlorokybus as a Basal Streptophyte Lineage

  • Lee, Jung-Ho;James R. Manhart
    • ALGAE
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    • 제17권1호
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    • pp.53-58
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    • 2002
  • The transition of plant life from aquatic algae to land to land plants was one of the major events in the history of life. However, in hypothesizing the exact evolutionary path of the transition, limited shared phenotypic characters in aquatic algae and land plants (embryophytes) have been a major hinderance. Chloroplast genomes contain characters useful in tracing evolutionary histories. Embryophyte chloroplast genomes are distinguished from algal cpDNAs by having over 20 group Ⅱ introns, some of which were gained during the transition from algae to embryophytes (Manhart and Palmer 1990; Lew and Manhart 1993;Lee and Manhart 2002). Here we examine a gene cluster that, in land plants, contains psbB, psbT, psbH, petB and petD with introns found in petB and petD (petB.i and petD.i). In addition the presence/absence of introns in trnA and trnI (trnA.i and trnI.i) were determined in all five major lineages of charophytes. We found that the psbB gene cluster occurs in most surveyed charophytes and embryophytes except Spirogyra (Zygnematales) which lacks it due to intra-genomic rearrangement. All four introns are absent in Chlorokybus but present in some or all of the other four charophyte lineages (Klebsormidiales, Zygnematales, Coleochaetales, and Charales). In addition, Chlorokybus is distinguished from other charophytes and embryophytes by having an unusually long spacer (over 2 kb) between psbH-petB. The results indicate that Chlorokybus diverged before the intron gains but after psbB gene cluster formation, placing the other charophyte lineages closer to embryophytes.

The Occurrence of Griffithsia okiensis (Ceramiaceae, Rhodophyta) from Korea on the Basis of Morphology and Molecular Data

  • Kim, Hyung-Seop;Yang, Eun Chan;Boo, Sung Min
    • ALGAE
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    • 제21권1호
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    • pp.91-101
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    • 2006
  • Despite continued studies on red algal flora in Korea, the taxonomy of the tiny ceramiaceous algae has received little attention. We report for the first time Griffithsia okiensis from Korea on the basis of morphology and molecular data. The species is small in thalli height (0.3-1.5 cm), and in diameter of vegetative cells (50-500 μm), and the ratio of cell length/breadth is 2-3 times. It has two carpogonial branches from the supporting cell of procarp. We generated psbA and rbcL sequences from ten specimens of G. okiensis isolated from Korea and Japan and from one G. japonica species isolated Japan. Eight specimens of G. okiensis from Korea were almost identical in both psbA and rbcL regions, nevertheless they differed from Japanese specimens by 4 ucleotides in psbA and 7 in rbcL. In all analyses of psbA, rbcL, and psbA + rbcL data sets, G. okiensis was determined to be a different species from G. japonica isolated from Japan, although both species showed a sister relationship. For all that extensive collection trips, we found no evidence for the occurrence of G. japonica in Korea.

Identification and Expression Analysis of Chloroplast p-psbB Gene Differentially Expressed in Wild Ginseng

  • Kim, Doo-Young;Kwon, Ki-Rok;Kang, Won-Mo;Jeon, Eun-Yi;Jang, Jun-Hyeog
    • 대한약침학회지
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    • 제15권1호
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    • pp.18-22
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    • 2012
  • Panax ginseng is a well-known herbal medicine in traditional Asian medicine. Although wild ginseng is widely accepted to be more active than cultivated ginseng in chemoprevention, little has actually been reported on the difference between wild ginseng and cultivated ginseng. Using suppressive subtraction hybridization, we cloned the p-psbB gene as a candidate target gene for a wild ginseng-specific gene. Here, we report that one of the clones isolated in this screen was the chloroplast p-psbB gene, a chlorophyll a-binding inner antenna protein in the photosystem II complex, located in the lipid matrix of the thylakoid membrane. Real-time results showed that the expression of the p-psbB gene was significantly up-regulated in wild ginseng as compared to cultivated ginseng. Thus, the p-psbB gene may be one of the important markers of wild ginseng.

기관 삽관 중인 환자에서 Blind Protected Specimen Brushing의 역할 (The Role of Blind Protected Specimen Brushing (PSB) in Intubated Patients)

  • 유희승;홍지현;윤장욱;엄광석;이재명;김철홍;장승훈;김동규;이명구;현인규;정기석
    • Tuberculosis and Respiratory Diseases
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    • 제55권1호
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    • pp.59-68
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    • 2003
  • 연구배경 : 기관 삽관을 한 환자에서 정확한 폐렴의 진단과 원인균을 파악하는 것이 쉽지 않다. 경기관 흡인물(endotracheal aspirate) 배양검사는 간편하지만, 객담채취시 오염의 기회가 많고, 부적절한 객담채취의 기회가 높아서 그 원인균을 알아내는데는 어려움이 많다. 따라서 본 연구에서는 폐렴 진단 방법의 일환으로 좀 더 간편하고 비침습적인 방법인 blind PSB를 시행하여 진단의 유용성과 치료 및 예후에 미치는 영향을 알아보고자 하였다. 방 법 : 기관 삽관을 한 환자중에서 감염성 폐령이 의심되었던 51명의 환자를 대상으로 blind PSB(protected specimen brushing)를 시행하였고, 경기관 흡인물(endotracheal aspirate) 배양 및 혈액 배양검사를 통한 진단 결과와 비교하였다. 대상환자에서 기관 삽관 튜브를 통하여 폐렴이 생긴 폐구역에 해당되는 기관지에 접근하여 PSB 카테터로 기관지내의 화농성 분비물을 채취하여 15분 이내에 정량적 배양검사를 의뢰하여 $10^3/ml$ 이상의 colony forming units를 보일 때 양성으로 판정하였다. 결 과 : 51명의 환자 중 병원내 감염 폐렴은 27명(52.9%)이었고, 이 중에서 VAP가 19명(37.3%)이었고, 지역사회 감염 폐렴은 15명(29.4%)이었다. 비 폐렴성 폐 침윤으로 확인된 9명(17.6%)의 환자 중 울혈성 심부전이 5명(98%), 폐결핵이 3명(5.9%), 폐출혈이 1명(2.0%) 이었다. 원인균 규명을 위한 배양검사의 민감도와 특이도는 객담에서 각각 83.3%(35/42), 77.8%(7/9), 혈액에서 각각 14.3%(6/42), 100%(9/9)였고, blind PSB에서는 각각 548%(23142), 88.9%(8/9)였다. 유사한 민감도와 특이도를 고려하면, blind PSB는 객담배양검사에 비하여 우월하다고 할 수 있다. 초기 항생제 치료는 blind PSB 배양결과에 따라서 항생제를 교체하였는데, 항생제를 교체한 환자군의 생존율은 교체하지 않았던 환자군의 생존율과 통계적으로 유의한 차이가 없었다. 결 론 : Blind PSB는 기관 삽관된 환자에서 폐렴이 의심되는 경우 비감염성 폐침윤과의 감별에 도움을 주고 폐렴의 원인균을 간편하고 빠르게 확인하는데 유용하다. 또한 경기관 흡인물 배양검사에 비해 신뢰도는 낮지 않으면서 정량적 배양이 가능하여 불필요한 항균제의 사용을 감소시킬 수 있을 것으로 사료되며, 기관지 내시경검사를 할 수 없는 환자에서도 이용이 가능하다. 또한 기관지 내시경이 필요없어 검사비용에 비한 효과면에서 유용하고 안전한 검사이다.

엽록체 DNA matK와 psbA-trnH 염기서열에 기초한 한국산 향나무절(향나무속) 식물의 분자계통학적 연구 (Molecular phylogenetic study of section Sabina (Genus Juniperus) in Korea based on chloroplast DNA matK and psbA-trnH sequences data)

  • 홍정기;양종철;오승환;이유미
    • 식물분류학회지
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    • 제44권1호
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    • pp.51-58
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    • 2014
  • 한국산 향나무절 식물에 대한 계통학적 유연관계를 규명하고, 더불어 향나무속 및 향나무절의 계통 및 유연관계를 잘 나타낼 수 있는 분자마커를 찾아내고자 분자계통학적 연구를 수행하였다. 엽록체 DNA matK와 psbA-trnH를 분자마커로 활용하였으며, 두 유전자의 조합분석결과 향나무절이 100%의 BP로 지지되는 분계조를 이루었다. 눈향나무+단천향나무 분계조와 향나무+섬향나무+뚝향나무 분계조는 각각 91%, 100%의 BP로 지지되었다. 따라서 한국산 향나무절은 (1) 눈향나무+단천향나무, (2) 향나무+섬향나무+뚝향나무 두 개의 분계조로 구분하는 것이 가장 적합할 것으로 생각되고, 본 연구에서 이용된 두 개의 분자마커 중 matK가 psbA-trnH 보다 향나무속 및 향나무절의 계통 및 유연관계를 규명하는데 다소 높은 해상력을 나타내었다.

겨울철 저온스트레스에 의한 문주란의 광합성효율과 psbA 유전자의 발현양상 (Photochemical Efficiency and psbA Gene Expression of Crinum Leaves under Natural Environmental Stress in Winter)

  • 오순자;고석찬
    • 한국환경과학회지
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    • 제13권4호
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    • pp.359-365
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    • 2004
  • The change of chlorophyll fluorescence parameters, O-J-I-P transients and psbA gene expression were investigated in the leaves of Crinum asiaticum var. japonicum on the natural condition in winter, in order to elucidate physiological responses of photosystem II (PS II) activity to winter stresses. The photochemical efficiencies of PS II, Fv/Fm, were significantly low in winter, contrary to its high value in summer. The values of I -qN and I-qP were lower in midday than at dawn or night both in summer and winter, although their decrease in midday was less in winter than in summer. In the O-J-I-P transients, the fluorescence intensity of J, I, P-step decreased remarkably depending on temperature drop in winter. And the D I reaction center protein of PS II decreased in late winter more than in early winter, concomitantly with relatively high content of description products of psbA gene in midday. These results indicate that low temperature in winter causes irreversible damage to PS II and subsequently leads to cell death.

Plant-growth promoting traits of bacterial strains isolated from button mushroom (Agaricus bisporus) media

  • Yeom, Young-Ho;Oh, Jong-Hoon;Yoon, Min-Ho
    • 한국버섯학회지
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    • 제19권3호
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    • pp.134-139
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    • 2021
  • A diverse group of plant-growth promoting bacteria were isolated in button mushroom (Agaricus bisporus) media to investigate the plant-growth promoting traits of compounds including indole acetic acid (IAA), ammonia, 1-aminocyclopropane-1-carboxylic acid deaminase, siderophore, and hydrogen cyanide. Twenty-one bacterial strains showing positive effects for all the test traits were selected and classified to confirm bacterial diversity in the media habitat. Plant-growth promoting traits of the isolates were also assessed. All strains produced IAA ranging from 20 ㎍/mL to 250 ㎍/mL. Most of the isolates produced more than 80% siderophore. Four strains (Pantoea sp., PSB-08, Bacillus sp., PSB-13, Pseudomonas sp., PSB-17, and Enterobacter sp., PSB-21) showed outstanding performances for all the tested traits. In a bioassay of these four strains using mung bean plant, the best growth performances (23.16 cm, 22.98 cm, 2.27 g/plant, and 1.83 g/plant for shoot length, root length, shoot dry weight, and root dry weight, respectively) were obtained from the plants co-inoculated with Bacillus sp., PSB-13. The resultant data indicate that button mushroom media have got a diverse group of bacteria with plant growth promoting abilities. Thus, the media could be a good recycling resource for using to an effective bio-fertilizer.