JP6860552B2 - 植物における病気の処置方法 - Google Patents
植物における病気の処置方法 Download PDFInfo
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Description
式中、Rは、水素、ヒドロキシル、ハロゲン、アルキルC1−12、ヘテロアルキルC1−12、シクロアルキルC3−7、ヘテロシクロアルキルC3−7、アリール、ヘテロアリール、アリールアルキルC1−3、ヘテロアリーロアルキルC1−3、アリーロシクロアルキルC1−7、ヘテロアリーロシクロアルキルC1−7、アルキルC1−3シクロアルキルC3−7、ヘテロアルキルC1−3シクロアルキルC3−7又はそれらの塩からなる群から選択される1つ以上の置換基である。
用語「アルキル」は、炭素原子の定義された数を有する直鎖(すなわち、非分枝鎖)又は分枝鎖を有する脂肪族炭化水素基を指す(すなわち、「アルキルC1−C10」は、1〜10個の炭素原子によって構成され得るアルキルに相当する)。アルキル基は、完全飽和、一不飽和又は多不飽和であってもよく、二価及び多価基を含み得る。飽和炭化水素基の例は、メチル、エチル、n−プロピル、イソプロピル、2,3−ジメチルブチルなどの基を含むが、これらに限定されない。不飽和炭化水素基の例は、ビニル、2−プロペニル、2−ブタジエニル、1,4−ヘキサジエニル、1,3−ペンタジエニル、エチニル、3−プロピニル、3−ブチニル、2,4−ペンタジエニルなどの基を含むが、これらに限定されない。本明細書で使用される用語「アルキル」は、直鎖又は分枝鎖を有する二価の脂肪族炭化水素基を包含することに留意されたい。二価のアルキル基の例は、−CH2CH2CH2CH2−;−CH2CH=CHCH2−;−CH2C≡CCH2−;−CH2CH2CH(CH2CH2CH3)CH2−などが挙げられるが、これらに限定されない。
シロイヌナズナ植物を、1μMで化合物で処理した。10の植物からの葉を、噴霧適用後24時間で集めた。総RNAを、DNase処理を含む、製造業者の指示に従って、RNeasyキット(Qiagen, Valencia, CA)を使用して葉から抽出した。cDNAを、製造業者の指示に従ってオリゴdTプライマー及び逆転写キットスーパースクリプト(SuperScript)III(Invitrogen, Carlsbad, CA)を使用することによって合成した。リアルタイム定量PCRを、RotorGene 3000 PCR装置(Corbett, Australia)及びQuantiTect SYBR Green PCRキット(Qiagen)を使用して実施した。シロイヌナズナ植物の病気に対する防御に関連する遺伝子のプライマーの全配列を、表6に示す。リアルタイムPCRにおける反応条件は、95℃で15分間の初期変性ステップ、続いて95℃で15秒間の変性、60℃で30秒間のアライメントステップ及び72℃で30秒間、40サイクルの伸長ステップであった。分析を、RotorGene 3000ソフトウェア(Corbett, Australia)を使用して実施し、5つの複製物を各試料に使用した。実験を2回繰り返した。
シトラス植物(スイートオレンジ(Citrus sinensis))を式I〜Vの化合物で1μMで処理した。10個の植物からの葉を、噴霧適用後24時間で集めた。総RNAを、DNase処理を含む、製造業者の指示に従って、RNeasyキット(Qiagen, Valencia, CA)を使用して葉から抽出した。cDNAを、製造業者の指示に従ってオリゴdTプライマー及び逆転写キットスーパースクリプト(SuperScript)III(Invitrogen, Carlsbad, CA)を使用することによって合成した。リアルタイム定量PCRを、RotorGene 3000 PCR装置(Corbett, Australia)及びQuantiTect SYBR Green PCRキット(Qiagen)を使用して実施した。シトラス植物の病気に対する防御に関連する遺伝子のプライマーの全配列を、表7に示す。リアルタイムPCRにおける反応条件は、95℃で15分間の初期変性ステップ、続いて95℃で15秒間の変性、60℃で30秒間のアライメントステップ及び72℃で30秒間、40サイクルの伸長ステップであった。分析を、RotorGene 3000ソフトウェア(Corbett, Australia)を使用して実施し、5つの複製物を各試料に使用した。実験は2回繰り返した。
この実験を温室条件下で行った。HLBの症状を有する植物を、適切な灌漑レジメンを有する黒いプラスチックバックに入れた。HLBの症状を有する植物におけるCandidatus ‘Liberibacter asiaticus’細菌のレベルを、標準曲線に従って葉内の細菌の絶対定量化及び細菌から増幅された16SリボソームDNAを介して、リアルタイムPCRによって決定した。実験の前に、処理当たり10の植物を選択した。細菌の定量化を、3ヵ月毎、1年間行った。最後の評価は、植物の全ての葉をとり、DNAの単離前に混合物を実施することによって行った。式I〜Vの化合物の濃度は、1μMであり、それらを、15日ごとに噴霧によって適用した。DNAを、プロメガ(Promega)からのDNAの単離のためのプロトコルに従って葉から抽出した。
この実験の目的は、カンキツ類HLB病を制御するのに必要な式I〜Vの化合物の最小濃度を評価することであった。HLBを有する10の成長するカンキツ類植物(スイートオレンジ(Citrus sinensis)を各容量について使用した。試験した濃度は、0.001、0.01、0.1、1、5、及び10μMであり、化合物を15日ごと、12ヶ月間噴霧することによって適用した。評価を、処理後12ヶ月に行った。細菌Candidatus ‘Liberibacter asiaticus’のレベルを、例3のように決定した。植物中の細菌の力価の平均は、反応当たり約6000コピーであった。表8に示すように、アッセイされた化合物の0.01〜5μMの濃度から、細菌レベルは劇的に減少した。
この実験の目的は、罹患したカンキツ類植物におけるカンキツ類HLB病の制御に対する化合物IBの噴霧適用の頻度の影響を決定することであった。1回の治療につき10の植物を使用し、調査した適用頻度は、1ヶ月に1回及び2回、6ヶ月間であった。用いた濃度は、1μMであり、細菌レベルの測定は、毎月実施した。Candidatus ‘Liberibacter asiaticus’細菌のレベルを、例3と同様に測定した。図4からわかるように、細菌の減少が、両方の試験された変異体で観察された。月に1回の適用は、月に2回の適用と比べて、細菌のレベルを有意に低下させた。
異なる植物の病気の対照に対して式I〜Vの化合物の効果を比較するために、実験を、それぞれPhytophthora parasitica、紋枯病菌(Rhizoctonia solani)、 トマト輪紋病菌(Alternaria solani)、ノカルジア属(Nocardia sp)及びボトティス・シネレア(Botrytis cinerea)を接種したタバコ、トマト及びシロイヌナズナ(Arabidopsis thaliana)植物で実施した。化合物を1μMの濃度で、24時間毎に1週間噴霧することによって適用した。植物死亡率は、Phytophthora parasitica、紋枯病菌(Rhizoctonia solani)及びノカルジア属(Nocardia sp)によって生産された病気について決定されたが、症状を伴う葉の割合は、トマト輪紋病菌(Alternaria solani)による感染について決定された。ボトティス・シネレア(Botrytis cinerea)の影響を受けた植物の場合、病変直径を測定した。表9は、化合物がいくつかの植物の病気による死亡率の減少に顕著な効果を有し、それらによって引き起こされる症状の減少もまた観察されたことを示す。各治療は、50の植物を含んだ。対照として、水で処理した植物を研究した。各処理の植物は、異なる接種プロトコル(Frontiers in Plant Science 3: 268, 1−6, 2012年)に従って、示された病原体を事前に接種し、その後それらを化合物で処理した。
Pp−Nt:Phytophthora parasitica−タバコ;Rs−Nt:紋枯病菌(Rhizoctonia solani)−タバコ;N−Nt:ノカルジア菌属(Nocardia sp)−タバコ;Rs−S1:紋枯病菌(Rhizoctonia solani)−トマト;As−SI:トマト輪紋病菌(Alternaria solani)−トマト;Bc−At:ボトリティス・シネレア(Botrytis cinerea)−シロイヌナズナ(Arabidopsis);Bc−Nt:ボトリティス・シネレア(Botrytis cinerea)−タバコ;Bc−SI:ボトリティス・シネレア(Botrytis cinerea)−トマト。*値は、前記病気による死亡率のパーセンテージ(%)を表す。**値は、病気の症状を有する葉のパーセンテージ(%)を表す。***値は、病気によって生成された病変の直径(mm)の平均を表す。
この実験は、HLB及び高レベルの昆虫ベクター集団によって影響されるカンキツ類植物を有する領域において、HLB症状のないカンキツ類植物に対して、1ヶ月に1回、1μMの濃度で化合物の適用の防除効果を決定するために行った。HLBを含まない10のカンキツ類植物を治療ごとに研究し、それらに、噴霧によって評価される化合物の溶液を与えた:HLBのない10のカンキツ類植物は、化合物で処理されなかった。Candidatus ‘Liberibacter asiaticus’細菌のレベルを、例3として決定した。
化合物の溶液を、エタノール中で調製し、葉状適用のために1μMの濃度まで水で希釈した。5日ごとに適用し、各化合物で葉のみを噴霧した。10の植物を各治療に使用し、最終評価を、植物当たりの結節の数を定量することによって、35日後に実施した。表10に示されるように、化合物は、試験された作物において、植物当たり結節の数を有意に減少させながら、線虫に全身効果を誘導した。このようにして、トマト、バナナ、及びオオバコにおける植物寄生線虫サツマイモネコブセンチュウ(Meloidogyne incognita)、バナナネモグリセンチュウ(Radopholus similis)及びミナミネグセレセンチュウ(Pratylenchus coffeae)の高集団を制御する化合物の有効性が実証された。
Claims (11)
- 病気が、細菌、卵菌綱、真菌及び線虫にからなる群から選択される植物病原体によって引き起こされるものである、請求項1に記載の方法。
- 植物病原体が細菌カンジダツス「リベリバクターアジアチクス」(Candidatus ‘Liberibacter asiaticus’)である、請求項2に記載の方法。
- 組成物が、0.01μM〜5μMの前記化合物を含む、請求項1に記載の方法。
- 化合物が月に1回又は2回植物に適用される、請求項1に記載の方法。
- 請求項1に記載の化合物又は前記化合物の塩を少なくとも1つ含み、さらに適切な賦形剤若しくは担体を含む、農業用組成物。
- 化合物が0.01μM〜5μMの範囲である、請求項6に記載の組成物。
- 細菌カンジダツス「リベリバクターアジアチクス」(Candidatus ‘Liberibacter asiaticus’)によって引き起こされる病気の処置のために植物に適用されることを特徴とする、請求項7に記載の組成物。
- 請求項1に記載の化合物又はその塩の、植物の病気に対する自然防御機構の刺激及び抵抗性の誘導のための使用。
- 病気が、細菌、卵菌綱、真菌及び線虫からなる群から選択される植物病原体によって引き起こされるものである、請求項9に記載の使用。
- 植物病原体が細菌カンジダツス「リベリバクターアジアチクス」(Candidatus ‘Liberibacter asiaticus’)である、請求項10に記載の使用。
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EP3743419B1 (en) * | 2018-01-24 | 2022-09-14 | GlaxoSmithKline Intellectual Property Development Limited | Novel compounds for the treatment of parasitic infections |
CN113727607B (zh) * | 2019-02-19 | 2023-07-25 | 奥罗农业股份有限公司 | 用于控制和/或治疗植物的维管组织病害的农业组合物 |
CN110012908B (zh) * | 2019-05-22 | 2021-07-20 | 浙江养生堂天然药物研究所有限公司 | 防治病原物侵染植物的方法 |
JP7381078B2 (ja) * | 2020-02-27 | 2023-11-15 | 国立研究開発法人農業・食品産業技術総合研究機構 | リベリバクター属細菌の増殖制御剤およびその制御方法 |
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DE10013294A1 (de) | 2000-03-17 | 2001-09-20 | Basf Ag | Ionenkanal-bildende Peptaibole als Resistenzinduktoren |
FR2816318B1 (fr) * | 2000-11-03 | 2005-01-07 | Oreal | Production de metabolites d'interet par co-culture de cellules vegetales et de cellules non vegetales |
US8278340B2 (en) * | 2007-11-27 | 2012-10-02 | North Carolina State University | Inhibition of biofilms in plants with imidazole derivatives |
US20100159010A1 (en) * | 2008-12-24 | 2010-06-24 | Mutual Pharmaceutical Company, Inc. | Active Agent Formulations, Methods of Making, and Methods of Use |
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CU23949B1 (es) * | 2011-02-28 | 2013-10-29 | Ct De Ingeniería Genética Y Biotecnología | Método para la prevención o tratamiento de la enfermedad huanglongbing |
CN102067850B (zh) | 2011-03-02 | 2013-07-17 | 江苏省中国科学院植物研究所 | 补骨脂素作为农业杀菌剂或杀虫剂的用途 |
WO2013148677A1 (en) * | 2012-03-26 | 2013-10-03 | University Of Florida Research Foundation, Inc. | Antimicrobial compounds and their use in treating plant disease |
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CU24371B1 (es) | 2018-11-06 |
BR112018001965B1 (pt) | 2022-10-25 |
US10993438B2 (en) | 2021-05-04 |
CN108135176A (zh) | 2018-06-08 |
RU2739944C2 (ru) | 2020-12-30 |
US20180213786A1 (en) | 2018-08-02 |
EP3338553A2 (en) | 2018-06-27 |
MA42661A (fr) | 2018-06-27 |
CA2993456A1 (en) | 2017-02-09 |
WO2017020874A2 (es) | 2017-02-09 |
RU2018106900A3 (ja) | 2020-08-06 |
BR122019027440B1 (pt) | 2024-01-09 |
CA3185322A1 (en) | 2017-02-09 |
BR112018001965A2 (pt) | 2018-09-25 |
RU2018106900A (ru) | 2019-08-29 |
AU2016301725A1 (en) | 2018-02-15 |
US11013235B2 (en) | 2021-05-25 |
CN108135176B (zh) | 2021-06-04 |
US20200288720A1 (en) | 2020-09-17 |
KR20180037979A (ko) | 2018-04-13 |
CU20150077A7 (es) | 2017-03-03 |
MX2018001322A (es) | 2018-05-17 |
WO2017020874A3 (es) | 2017-05-18 |
ZA201800632B (en) | 2018-12-19 |
CL2018000275A1 (es) | 2018-09-28 |
CA2993456C (en) | 2024-04-23 |
JP2018527332A (ja) | 2018-09-20 |
KR102671187B1 (ko) | 2024-05-31 |
IL257189A (en) | 2018-03-29 |
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