• 제목/요약/키워드: A. tumefaciens-mediated transformation

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An easy and efficient protocol in the production of pflp transgenic banana against Fusarium wilt

  • Yip, Mei-Kuen;Lee, Sin-Wan;Su, Kuei-Ching;Lin, Yi-Hsien;Chen, Tai-Yang;Feng, Teng-Yung
    • Plant Biotechnology Reports
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    • 제5권3호
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    • pp.245-254
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    • 2011
  • This study describes an efficient protocol for Agrobacterium tumefaciens-mediated transformation of two subgroups of genotype AAA bananas (Musa acuminata cv. Pei Chiao and Musa acuminata cv. Gros Michel). Instead of using suspension cells, cauliflower-like bud clumps, also known as multiple bud clumps (MBC), were induced from sucker buds on MS medium containing $N^6$-Benzylaminopurine (BA), Thidiazuron (TDZ), and Paclobutrazol (PP333). Bud slices were co-cultivated with A. tumefaciens C58C1 or EHA105 that carry a plasmid containing Arabidopsis root-type ferredoxin gene (Atfd3) and a plant ferredoxin-like protein (pflp) gene, respectively. These two strains showed differences in transformation efficiency. The EHA105 strain was more sensitive in Pei Chiao, 51.3% bud slices were pflp-transformed, and 12.6% slices were Atfd3-transformed. Gros Michel was susceptible to C58C1 and the transformation efficiency is 4.4% for pflp and 13.1% for Atfd3. Additionally, gene integration of the putative pflp was confirmed by Southern blot. Resulting from the pathogen inoculation assay, we found that the pflp transgenic banana exhibited resistance to Fusarium oxysporum f. sp. cubense tropical race 4. This protocol is highly advantageous to banana cultivars that have difficulties in setting up suspension cultures for the purpose of quality improvement through genetic transformation. In addition, this protocol would save at least 6 months in obtaining explants for transformation and reduce labor for weekly subculture in embryogenic cell suspension culture systems.

Agrobacterium tumefaciens를 매개로 한 옥수수 유동유전자 Ac 및 Ds에 의한 서양고추냉이 (Armoracia rusticana)의 형질전환 (Transformation of Maize Controlling Element Ac and Ds into Armoracia rusticana via, Agrobacterium tumefaciens)

  • 배창휴;노일섭;임용표;민경수;김동철;김학진;이효연
    • 식물조직배양학회지
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    • 제21권6호
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    • pp.319-326
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    • 1994
  • 십자화과 식물의 유용유전자를 cloning하기 위한 기초연구로서 십자화과 식물인 Armoracia rusicna의 재분화계와 형질전환계를 확립하고, gene tagging을 하기 위하여 binary vector에 삽입된 옥수수의 transposon 유전자 Ac/Ds를 도입한 결과, NAA 0.1 mg/L와 BA 1.0 mg/L를 함유한 MS 배지에서 최적의 shoot를 유기할 수 있었으며, MS 기본배지에 옮기면 쉽게 발근을 유도할 수 있었다. 옥수수의 Ac/Ds의 유전자를 잎에 형질전환시킨 결과 8-10%의 형질전환율을 보였으며, 엽병의 경우에도 4%의 형질전환 식물체가 얻어졌다. Kanamycin 100 mg/L 농도에서 선발한 개체를 PCR 분석 및 Southern blot분석을 행하였던 결과 PCR분석으로부터 Ds유전자가 식물에 도입된 것이 확인되었고, Southern blot 분석으로부터 Ac/Ds 모두가 도입된 것이 확인되었다.

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Agrobacterium을 이용한 고추의 Transient Expression 시스템 (Development of an Agrobacterium-mediated Transient Expression System for Intact Leaves of Chili Pepper)

  • 성은수;정영희;최도일
    • Journal of Plant Biotechnology
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    • 제31권3호
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    • pp.185-190
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    • 2004
  • Agrobacterium을 이용한 GUS 유전자를 효과적으로 발현시키기 위하여 수행되어진 실험 결과를 요약하면 다음과 같다. 박테이라 농도별 실험을 수행한 결과 균의 전처리 배양 농도 O $D_{600nm}$ 0.3일때 원심분리한 후 얻어진 균을 희석한 후의 최종 농도는 O $D_{600nm}$ 0.8로 맞춘 실험 처리구에서 GUS 유전자 발현율이55%로 가장 높게 나타났다. 병원성 유도 배지 내에 Acetosyringone (AS)이 첨가되지 않은 경우 GUS 유전자가 발현된 고추 잎을 얻을 수 없었으나, 200$\mu$M을 첨가했을 때 90%의 가장 높은 GUS 유전자 발현율을 나타내어 많은 수의 GUS spots을 관찰할 수 있었다. Agrobacterium에 의한 고추 잎의 감염 정도를 조사한 바 Agrobacterium으로 감염시킨지 3일째부터는 박테리아 에한 감염 정도가 심해져서 GUS 유전자 발현 정도가 약해지므로 Agrobacterium으로 감염시킨지 2일째 되었을 때 GUS 유전자 발현이 가장 강하게 나타난 것을 확인하였다. 이 같은 결과는 박테리아에 의한 감염이 일어난지 3일째 부터는 식물체의 감염부위 고사를 일으키는 것과 관련된 것으로 보인다.

Agrobacterium tumefaciens에 의한 양황철나무의 형질전환(形質轉換) 요인(要因) (Factors Effecting Agrobacterium Mediated Transformation and Regeneration of Populus nigra × P. maximowiczii)

  • 박용구;신동원;김정희
    • 한국산림과학회지
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    • 제79권3호
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    • pp.278-284
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    • 1990
  • 우리나라에서 육성(育成)한 교잡종(交雜種)인 양황철나무에 대해 A. tumefaciens strain 6044(pGA472)에 대한 감염력(感染力)을 조사(調査)하였다. 침으로 자극(刺戟)한 양황철나무 잎에서 callus유발은 MS-2, 4-D 0.5 mg/l-BA 0.1 mg/l 배지에서 높게 나타났으며, 줄기는 MS-2, 4-D 0.1 mg/l-BA 0.2 mg/l 배지에서 많이 발생하였다. 형질전환(形質轉換)에 사용(使用)한 A. tumefaciens strain 6044는 AB 액체배지에서 OD 0.5 일때 접종하였는데 이때 박테리아의 농도(濃度)는 1ml당 $4{\times}10^8$개 였다 기내배양(器內培養)한 양황철나무옆에 대한 kanamycin 감수성(感受性)을 조사(調査)한 결과(結果) 10 mg/l에서 심한 생장(生長) 장애(障碍) 현상(現象)을 나타내어 식물체(植物體) 재분화(再分化)가 일어나지 않았다. 침으로 자극한 양황철나무 잎은 A. tumefaciens 6044와 공배양(共培養)한 후 carbenicillin 300 mg/l와 cefotaxime 200 mg/l에서 엽표면에 붙어 있는 박테리아를 제거하였다. 공배양(共培養)한 잎은 kanamycin 10 mg/l가 첨가된 배지(培地)에서 재분화(再分化)되었으며, 줄기 재분화율(再分化率)은 약 10%에 달했다.

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Introduction of Hog Cholera Virus Gene into Potato Plants by Agrobacterium-mediated Transformation and the Analysis of Its Expression

  • Kim, Hyun-Soon;Jeon, Jae-Heung;Kim, Cheol-Jung;Hyouk Joung
    • Journal of Plant Biotechnology
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    • 제4권4호
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    • pp.155-161
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    • 2002
  • The HCV gene was expressed in potato plants under the control of the constitutive CaMV 355 promoter or tuber-specific patatin promoter. Solanum tuberosum plants carrying a plant expression vector harboring the encoding region of HCV gene were generated by Agrobacterium tumefaciens-mediated in vitro transformation methods. The presence of HCV gene in the plant genome was detected by PCR and DNA hybridization experiments. We obtained the 5 lines of transgenic potato with the pMBPHCV construct and 4 lines of transgenic potato with the pATHCV construct. The HCV transgenic stably integrated into the potato genome, as well as their transcription. HCV mRNA was identified in leaf and tuber tissues of transgenic plants by Northern blot analysis. The transgenic potato plants produced the expected transcript, and the corresponding HCV protein accumulated in individual transgenic plants.

Expression of Porcine Epidemic Diarrhea Virus Spike Gene in Transgenic Carrot Plants

  • Kim, Young-Sook;Kwon, Tae-Ho;Yang, Moon-Sik
    • Plant Resources
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    • 제6권2호
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    • pp.108-113
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    • 2003
  • This study was carried out to obtain basic information for possibility of oral vaccine in carrot using Agrobacteruim -mediated transformation system. The epitope region of porcine epidemic diarrhea virus (PEDV) spike gene which is classified as a member of the Coronaviridae and causes an acute enteritis in pigs was successfully expressed in carrot (Daucus carota) using the Agrobacterium-mediated transformation system. Hypocotyl segments of in vitro germinated plantlets were infected with Agrobacteriun tumefaciens LBA 4404 harboring PEDV spike gene. Embryogenic callus (EC) was induced on MS selection medium with 1 mg/L 2,4-D, 50 mg/L kanamycin and 300 mg/L cefotaxime after 45 days of culture. Subcultured ECs on MS selection medium without 2,4-D were converted to somatic embryos (SE) of various stage; globular, heart and torpedo stage. Putative transgenic embryos were selected on MS medium with 50 mg/L kanamycin and 300 mg/L cefotaxime. Regenerated plantlets from transformed SE were induced on MS medium containing 50 mg/L kanamycin after 30 days of culture. Genomic PCR confirmed the integration of PEDV spike gene into nuclear genome of carrot and northern blot analysis demonstrated the expression of PEDV spike gene in transgenic carrot.

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Agrobacterium을 이용한 팽이 버섯 주름조직의 형질전환 (Agrobacterium-mediated transformation using gill tissue of Flammulina velutipes)

  • 박순영;;장갑열;신평균;박윤정;유영복;박기문;공원식
    • 한국균학회지
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    • 제38권1호
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    • pp.48-53
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    • 2010
  • 팽이버섯의 다양한 유전자의 기능을 연구하기 위한 방법으로 팽이 자실체의 주름조직을 사용하여 A. tumefaciens을 매개로 한 형질전환을 수행하였다. Hygromycin 항생제 저항성 유전자를 포함하고 있는 AGL-1 pBGgHg를 팽이버섯의 자실체 조직에 도입시킴으로서 형질전환체들을 얻을 수 있었다. 형질전환체 선발은 첫 번째로 hygromycin 선발 배지에서 선발한 뒤 gpd-FH, hph-R primer를 이용하여 PCR로 확인 할 수 있었다. hygromycin은 30 ug/ml에서 선발 효율이 가장 높았다. 형질전환체 중 일부는 갈색 자실체를 갖는 wild type과는 달리 백색 자실체를 나타내었다. 형질전환체의 southern blot결과 외래유전자가 팽이버섯 내부에 하나 또는 그 이상의 다양한 copy 수로 삽입되어 있음을 알 수 있었다. 또한 삽입된 유전자의 주변 염기서열에 대한 정보는 Inverse PCR을 통해 알 수 있었다.

Metabolic engineering of aliphatic glucosinolates in Chinese cabbage plants expressing Arabidopsis MAM1, CYP79F1, and CYP83A1

  • Zang, Yun-Xiang;Kim, Jong-Hoon;Park, Young-Doo;Kim, Doo-Hwan;Hong, Seung-Beom
    • BMB Reports
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    • 제41권6호
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    • pp.472-478
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    • 2008
  • Three Arabidopsis cDNAs, MAM1, CYP79F1, and CYP83A1, required for aliphatic glucosinolate biosynthesis were introduced into Chinese cabbage by Agrobacterium tumefaciens-mediated transformation. The transgenic lines overexpressing MAM1 or CYP83A1 showed wild-type phenotypes. However, all the lines overexpressing CYP79F1 displayed phenotypes different from wild type with respect to the stem thickness as well as leaf width and shape. Glucosinolate contents of the transgenic plants were compared with those of wild type. In the MAM1 line M1-1, accumulation of aliphatic glucosinolates gluconapin and glucobrassicanapin significantly increased. In the CYP83A1 line A1-1, all the aliphatic glucosinolate levels were increased, and the levels of gluconapin and glucobrassicanapin were elevated by 4.5 and 2 fold, respectively. The three CYP79F1 transgenic lines exhibited dissimilar glucosinolate profiles. The F1-1 line accumulated higher levels of gluconapoleiferin, glucobrassicin, and 4-methoxy glucobrassicin. However, F1-2 and F1-3 lines demonstrated a decrease in the levels of gluconapin and glucobrassicanapin and an increased level of 4-hydroxy glucobrassicin.

Agrobacterium tumefaciens을 이용한 대두 형질전환체 개발 (Development of Transgenic Soybean Using Agrobacterium tumefaciens)

  • 조미애;최동욱;유장렬;;최필선
    • Journal of Plant Biotechnology
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    • 제31권4호
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    • pp.255-259
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    • 2004
  • Agrobacterium과 자엽절 공동배양으로 대두 형질전환체를 생산하였다. 대두 배양재료는 3개의 품종과 1개의 genotype의 자엽절 절편을 사용하였으며, bar유전자와 GUS유전자로 제작된 pPTN289와 pCAMBIA3301벡터를 LBA4401, GV3101, EHA101, C58에 각각 형질전환하여 공동 배양하였고 모든 형질전환 방법은 약간 변형된 Zhang 등(1999)의 방법에 따라 수행하였다. 형질전환빈도는 아그로박테리움의 종류에 따라 현저한 차이가 있었으며, 특히 사용한 균주중 EHA101에서 3.6%로 최대치를 보였다. Glufosinate가 첨가된 선발배지에서 106개의 식물체를 얻었으며, 이중 Thorne에서 5개체, 1049에서 5개체, 백운콩에서 1개체 등 모두 11개로부터 GUS양성반응을 확인하였다. Southern분석과 basta검정법에 의하여 T1세대 식물체로부터 GUS유전자와 bar유전자가 발현되고 있음을 확인하였다.

An Efficient Plant Regeneration and Transformation System of Robinia pseudoacacia var. umbraculifera for Phytoremediation

  • Kwon, Hye-Jin;Woo, Seong-Min;Seul, Eun-Jun;Kim, Teh-Ryung;Shin, Dong-Un;Kim, Hag-Hyun
    • Journal of Plant Biotechnology
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    • 제34권4호
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    • pp.293-298
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    • 2007
  • Robinia pseudoacacia var. umbraculifera, commonly called umbrella black locust were regenerated after co-cultivation of internode segments with Agrobacterium tumefaciens which included yeast cadmium factor 1 (YCF 1) gene. The tolerance to cadmium and lead for plants can be increased by the YCF1 gene expression. Moreover, the recent studies have shown that YCF1 gene transgenic plants increase the accumulation of cadmium and lead into plant vacuoles. The effect of plant growth regulator such as 2,4-dichlorophenoxyacetic acid (2,4-D), ${\alpha}$-naphthaleneacetic acid (NAA), 6-benzyladenine (BA), and thidiazuron (TDZ) were studied to evaluate the propagation of plants through internode explants. The efficient induction of multiple adventitious shoots and callus were observed on a medium supplemented with 0.1 mg/L TDZ + 0.2 mg/L BA. To induce shoot elongation and rooting, regenerated shoots were transferred into basal MS medium without any plant growth regulator. Successful Agrobacterium tumefaciens mediated transformation was obtained by 20 min vacuum-infiltration with $50{\mu}M$ acetosyringone on the optimal multiple shoot induction medium with 30 mg/L hygromycin and 300 mg/L cefotaxime. To confirm the integration and expression of transgene, Polymerase Chain Reaction (PCR) and Reverse Transcriptase PCR (RT-PCR) were performed with specific primers. The frequency of transformation was approximately 18.94%. This study can be used to genetic engineering of phytoremediator.