JP5801344B2 - 反芻動物の反芻胃内のメタン生成抑制能を有する微生物及びその利用 - Google Patents
反芻動物の反芻胃内のメタン生成抑制能を有する微生物及びその利用 Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/22—Methane [CH4], e.g. from rice paddies
Landscapes
- Feed For Specific Animals (AREA)
- Fodder In General (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Description
1−1.乳牛及び在来ヤギの飼育環境
乳牛は、順天大学校付設農場で飼育し、在来ヤギは全羅南道求礼で放牧して飼育し、実験には反芻胃瘻管が装着されたホルスタイン・フリーシアン(hostein friesian)種の乳牛及び在来ヤギを使用した。実験期間の間、乳牛は稲藁と濃厚飼料を6:4の割合で体重の2%水準で1日2回給与し、在来ヤギは稲藁を自由給与し肥育用濃厚飼料を毎日800g給与した。
反芻胃液は、前記実施例1−1の乳牛及び在来ヤギから収集した。
2−1.菌株の分離
前記実施例1−2で収集及び培養した反芻胃液から、メタン生成微生物(methanogens)と効果的に基質競争をする還元的酢酸生成菌(reductive acetogen)を分離するために、選択培地として使用されている下記表1の成分を有するAC−B1培地(Le Van等、1998)5mLに、培養された反芻胃液を5%接種した後、39℃のシェイキングインキュベーターで120rpmの速度で1週間培養した。
前記2−1で分離した菌株を固体培地で培養した後、コロニーをチューブに入れた後100μLの5%Chelex(Biorad)を入れた。その後、95℃で10分間置いた後、上澄液からでDNAを抽出した。
3−1.PCRの遂行及びDNAの確認
前記実施例2−1で分離した菌株の種を確認するために、分離した菌株の16S rDNAを利用して、重合酵素連鎖反応(polymerase chain reaction、PCR)実験を遂行した。
前記実施例3−1で増幅したDNAを、Qiagen社のQIAquick PCR Purification Kits(Qiagen、USA)を使用して分離した。その後、分離したDNAは、マクロゼン(Macrogen)社(大田、韓国)に送って両方向のDNAの塩基序列を分析した。
還元的酢酸生成(Reductive acetogenesis)微生物の分離のために、還元的酢酸生成(Reductive acetogenesis)関連遺伝子 FTHFS(Formyl tetrahydrofolate synthetase)を利用して、分離及び同定された還元的酢酸生成菌を特異的に検出した。
16S rRNA sequence分析結果から分類された菌株を、再PCRを還元酢酸生成プライマーFTHFs gene primers(G Henderson et al.、2010)を利用して Alkaliphilus crotonoxidans及びPaenibacillus acetatigenes菌株を分離同定した。
[配列番号5]
gcacgggtgagtaacacgtatgcaacctgccttcaacaaggggataacccgttgaaagac
ggactaataccctataacacaggggccccgcatggggatatttgttaaagattaatcggt
tgaagatgggcatgcgttccattagctagttggtggggtaatggcccaccaaggcaacga
tggataggggaactgagaggtttatcccccacactggtactgagacacggaccagactcc
tacgggaggcagcagtgaggaatattggtcaatggacgcaagtctgaaccagccacgtcg
cgtgaaggaagacggccctacgggttgtaaacttcttttgcaatgggaataaagtgagtc
acgtgtgacgtttttgcaagtaccttgcgaataaggatcggctaactccgtgccagcagc
cgcggtaatacggaggatccgagcgttatccggatttattgggtttaaagggtgctcagg
cgggcgattaagtcggcggtgaaattttgcggctcaaccgtaaaagtgccttcgaaactg
gttgccttgagtgtggatgaggtaggcggaatttgtggtgtagcggtgaaatgcatagat
atcacgaggaactccgattgcgcaggcagcttactaagccataactgacgctcaagcacg
gaggcgtggggatcagacaggattagataccctggtagtccacgcagtaaacgatgatta
ctggctgtttgcgatataatgtaagcggctgagcgacagcgttaagtaatccacctgggg
agtacgttcgcaagaatgaaactcaaaggaattgacgggggcccgcacaagcggaggaac
atgtggtttaattcgatgatacgcgaggaaccttacccgggcttgaaatgcatctggcgt
ctccagagatggggatttccttcgggacagatgtgtaggtggtgcatggttgtcgtcagc
tcgtgccgtgaggtgtcggcttaagtgccataacgagcgcaaccctcatcgttagttgcc
atcaggtcaagctggggactctaacgagactgccatcgtaagatgcgaggaaggtgggga
tgacgtcaaatcagcacggcccttacgtccggggcgacacacgtgttacaatgggtggta
5−1.アセト酸等の生成
選別した菌株の揮発性脂肪酸含量を測定するための実験を追加的にさらに遂行した。
前記実施例4で選別された菌株のメタン生成抑制能を評価するために、前記実施例5−1の方法を使用して各菌株のメタン生成抑制程度を観察した。
発酵性状試験のために、反芻胃カニューレ(Bar Diamond、Parma、ID、USA; internal diameter、120mm)が装着された平均体重376.75±6.25kgの去勢韓牛から発酵性状試験に必要な反芻胃液を採取した。
Claims (5)
- 反芻動物の反芻胃内のメタン生成抑制能を有するプロテイニフィルム属還元的酢酸生成菌であって、プロテイニフィルム・アセタティゲネス(Proteiniphilum acetatigenes)SROD1(寄託番号KCCM11219P)であることを特徴とする、前記プロテイニフィルム属還元的酢酸生成菌。
- 請求項1に記載のプロテイニフィルム属還元的酢酸生成菌を含む、反芻動物の反芻胃内のメタン生成抑制用微生物製剤。
- 請求項1に記載のプロテイニフィルム属還元的酢酸生成菌、又は請求項2に記載の微生物製剤を含むことを特徴とする畜産用飼料。
- 請求項1に記載のプロテイニフィルム属還元的酢酸生成菌、又は請求項2に記載の微生物製剤を動物に給与して反芻動物の反芻胃内のメタン生成を抑制する方法。
- 前記給与は、前記プロテイニフィルム属還元的酢酸生成菌が含まれた微生物製剤又は前記微生物製剤を含む畜産用飼料を前記反芻動物に提供することを特徴とする、請求項4に記載の反芻動物の反芻胃内のメタン生成を抑制する方法。
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