JP6908226B2 - チエノピリミジン誘導体を有効成分とする植物病害防除剤 - Google Patents
チエノピリミジン誘導体を有効成分とする植物病害防除剤 Download PDFInfo
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Images
Description
遺伝子の発現量は、当業者に公知の任意の方法・手段で測定することができる。例えば、発現されたmRNA量の測定としては、逆転写ポリメラーゼ連鎖反応(RT-PCR)、定量的転写ポリメラーゼ連鎖反応(QRT-PCR)、DNAマイクロアレイ、オリゴヌクレオチドマイクロアレイ、ノーザンブロッティング(ノーザンハイブリダイゼーション)、インサイチューハイブリダイゼーション、RNA分解酵素プロテクションアッセイなどを用いることができる。一方、タンパク質量の測定としては、ウェスタンブロッティング、ELISAアッセイ、タンパク質アレイ(プロテインチップ)、免疫組織染色、二次元電気泳動などを挙げることができる。
上記のようにして得られた103(2.0g、10mmol)を28%アンモニア水(30mL)に懸濁させ、120℃で8時間撹拌した。放冷後、濃塩酸(1.7mL)を加えて中和し、析出した固体をろ取、水で洗浄して104(1.21g、7.28mmol、収率73%)を無色固体として得た。
上記のようにして得られた104(1.17g、7.04mmol)にオキシ塩化リン(12mL)を加えて130℃で3時間加熱還流した。減圧下オキシ塩化リンを除去し、氷冷下、水(20mL)をゆっくり加えた。析出した固体をろ取して105(0.63g、3.4mmol、収率48%)を薄黄色固体として得た。
化合物処理による植物の免疫の活性化は、防御応答の代表的なマーカー遺伝子であるPR-1遺伝子とPDF1.2遺伝子の発現をモニターすることにより行った。PR-1遺伝子は植物の主たる防御応答経路であるサリチル酸シグナル伝達経路のマーカー遺伝子である。PDF1.2遺伝子は植物の防御応答経路であるジャスモン酸およびエチレンシグナル伝達経路のマーカー遺伝子である。
PR-1(At2g14610;フォワードプライマー5'-CCCACAAGATTATCTAAGGGTTCAC-3'/配列番号:3、リバースプライマー5'-CCCTCTCGTCCCACTGCAT-3'/配列番号:4)(Jirage et al. (2001) Plant J 26: 395-407)
PDF1.2(At5g44420;フォワードプライマー5'-CCATCATCACCCTTATCTTCGC-3'/配列番号:5、リバースプライマー5'-TGTCCCACTTGGCTTCTCG-3'/配列番号:6)
また、用いた化合物の構造は、下記の通りである(「N2914A1」については、上記)。
以下の方法で、アブラナ科野菜類炭疽病菌に対する感染抑制効果を評価した。植物材料として、シロイヌナズナ(生態型:コロンビア)を土(ダイオ化成社製)に播種し、22℃で24時間の明暗サイクルを明時間12時間および暗時間12時間として栽培した。播種して1週間後に1鉢当たり5個体になるように植え替えを行い、同条件下でさらに3週間栽培したシロイヌナズナ(生態型:コロンビア)を用いた。0.01%の展着剤マイリノーを添加した20ppmのN2914A1、N2781、N2835、N2947、N2969、N2972を、上述した通りに培養したシロイヌナズナに対し、1鉢当り3〜5mlの薬液を噴霧処理した。処理後、22℃で明時間12時間および暗時間12時間のサイクル条件下で静置した。散布2日後、人工培養したアブラナ科野菜類炭疽病菌(Colletotrichum higginsianum)胞子の懸濁液(5×105胞子/ml)を噴霧接種し、22℃、相対湿度100%の湿度に保ち感染させた。接種から5日後、接種葉をサンプリングし、定量的RT-PCR法により、アブラナ科野菜類炭疽病菌のシロイヌナズナへの感染量を定量した。なお、コントロールとして、化合物を含まない展着剤のみを散布し、同様の定量を行った。
なお、シロイヌナズナにおけるCBP20遺伝子の定量的RT-PCRに用いたプライマーの配列は、試験例1の通りである。
植物材料として、シロイヌナズナ(生態型:コロンビア)を土(ダイオ化成社製)に播種し、22℃で24時間の明暗サイクルを明時間12時間および暗時間12時間として栽培した。播種して1週間後に1鉢当たり5個体になるように植え替えを行い、同条件下でさらに3週間栽培したシロイヌナズナ(生態型:コロンビア)を用いた。上述したように培養したシロイヌナズナに、予め調製した0.01%の展着剤マイリノーを添加した20ppmの各種薬剤の溶液を、1鉢当り3〜5mlの噴霧で処理した。処理後、22℃で明時間12時間および暗時間12時間のサイクル条件下で静置した。散布2日後、人工培養したアブラナ科野菜類炭疽病菌(Colletotrichum higginsianum)胞子の懸濁液(5×105胞子/ml)を噴霧接種し、22℃、相対湿度100%の湿度に保ち感染させた。接種6日後、鉢当りの罹病度を下記基準により類別評価した。
0:病斑を認めない.1:病斑がわずかに認められる.2:病斑が葉面積の1/4未満を占める.3:病斑が葉面積の1/4〜1/2未満を占める.4:病斑が葉面積の1/2以上を占める.5:枯死.
防除価(%)=(1-(処理区の罹病度÷無処理区の罹病度))×100
なお、「N2914C」は、MAYBRIDGE社において、以下のプロダクトコードで開示されている。「N2914C」:GK03292。
植物材料として、シロイヌナズナ(生態型:コロンビア)を土(ダイオ化成社製)に播種し、22℃で24時間の明暗サイクルを明時間12時間および暗時間12時間として栽培した。播種して1週間後に1鉢当たり5個体になるように植え替えを行い、同条件下でさらに3週間栽培したシロイヌナズナ(生態型:コロンビア)を用いた。0.01%の展着剤マイリノーを添加した20ppmの各種薬剤を、上述したように培養したシロイヌナズナに対し、1鉢当り3〜5mlの噴霧で処理した。
以下の方法で、アブラナ科野菜類炭そ病菌に対する感染抑制効果を評価した。実施例2で記述した方法と同条件で育成したシロイヌナズナに、化合物溶液を茎葉散布した。溶液の散布から2日後、シロイヌナズナにアブラナ科野菜類炭そ病菌(5×105胞子/ml)を噴霧接種した。接種から5日後、接種葉をサンプリングし、試験例2と同様に、定量的RT-PCR法により、アブラナ科野菜類炭疽病菌のシロイヌナズナへの感染量を定量した。なお、コントロールとして、化合物溶液を含まない展着剤のみを散布し、同様の定量を行った。
植物材料として、シロイヌナズナ(生態型:コロンビア)を土(ダイオ化成社製)に播種し、22℃で24時間の明暗サイクルを明時間12時間および暗時間12時間として栽培した。播種して1週間後に1鉢当たり5個体になるように植え替えを行い、同条件下でさらに3週間栽培したシロイヌナズナ(生態型:コロンビア)を用いた。上述の通りに培養したシロイヌナズナに、予め調製した0.1%の展着剤アプローチBIを添加した20ppmの各種薬剤の溶液を、1鉢当り3〜5mlの噴霧で処理した。処理後、22℃で明時間12時間および暗時間12時間のサイクル条件下で静置した。
rpoDフォワードプライマー5'-CCGAGATCAAGGACATCAAC-3'/配列番号:9
rpoDリバースプライマー5'-GAGATCACCAGACGCAAGTT-3'/配列番号:10
なお、シロイヌナズナにおけるCBP20遺伝子の定量的RT-PCRに用いたプライマーの配列は、試験例1の通りである。
植物材料として、シロイヌナズナ(生態型:コロンビア)およびその変異体を土(ダイオ化成社製)に播種し、22℃で24時間の明暗サイクルを明時間12時間および暗時間12時間として栽培した。播種して1週間後に1鉢当たり5個体になるように植え替えを行い、同条件下でさらに3週間栽培した植物体を用いた。0.01%の展着剤マイリノーを添加した20ppmのN2914Cを、上述したように培養したシロイヌナズナに対し、1鉢当り3〜5mlの噴霧で処理した。
<223> 人工的に合成されたプライマー配列
Claims (3)
- 植物病害が、アブラナ科野菜類炭疽病菌またはアブラナ科黒斑細菌病菌による病害である、請求項2に記載の薬剤。
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