JPWO2010032765A1 - 植物免疫賦活蛋白質をコードする病原抵抗性遺伝子(pr遺伝子群)を発現させる水、及び同水を用いた植物病害の予防方法、並びに同水の生成装置 - Google Patents
植物免疫賦活蛋白質をコードする病原抵抗性遺伝子(pr遺伝子群)を発現させる水、及び同水を用いた植物病害の予防方法、並びに同水の生成装置 Download PDFInfo
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- JPWO2010032765A1 JPWO2010032765A1 JP2010529779A JP2010529779A JPWO2010032765A1 JP WO2010032765 A1 JPWO2010032765 A1 JP WO2010032765A1 JP 2010529779 A JP2010529779 A JP 2010529779A JP 2010529779 A JP2010529779 A JP 2010529779A JP WO2010032765 A1 JPWO2010032765 A1 JP WO2010032765A1
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Abstract
Description
XnOm(例えばTiO2) + hν → e- + h+VB
h+VB →h+tr
O2 + e-→O2・-
O2・-+h+VB(h+tr)→ O2
OH- + h+VB → OH・
2Cl- + O2+ e- →2ClO-
O3+hν→ O(1D) + O2(a1Δg)
O3+h+VB(h+tr)→ O2・-
上の反応は、通常UV-A領域の紫外線によるオゾンの直接的な励起では効率よく進行しないが、光依存的に励起状態となった光触媒体の存在下、一重項酸素の生成を伴う上記反応が進行すると考えられる。
下の式は、以下の3式でも表せる。
OH- + h+VB → OH・
OH・ + O3→O2 + HO2
HO2 ⇔H+ + O2・-
オゾン水を前駆物質とするスーパーオキシドアニオンラジカル生成の増加と一重項酸素生成の増加は、後述するように発明者らによって、ウミホタル由来ルシフェリンアナログの化学発光による検証が行なわれており、これらの反応に登場するヒドロキシラジカルの生成も5.5-Dimethyl-1-pyrroline N-oxide(DMPO)をスピントラップ剤として利用した電子スピン共鳴法による検証が発明者らにより行われている。
NO + e- →・NO
NO - e- →NO2-
2NO2 -- 2e-→2・NO3-
・NO + NO2 -→N2O3
・NO + O2・- →・ONOO-
・ONOO- + H+→HOONO→OH・
とより細胞障害性の強力なイオンとなる。
ここで生じる、O2・-の生成、・NOの生成、・ONOO-の生成、OH・の生成は、それぞれ蛍光プローブとの反応、葉酸の酸化アッセイ(蛍光法)、電子スピン共鳴法による発明者らの実験により検証済みである。
まず、図1及び図2を参照しながら、本実施形態に係る活性酸素種を含有した活性酸素含有水生成装置Aについて説明する。図1は、本実施形態に係る活性酸素含有水生成装置Aの側部断面図、図2は反応部10近傍の平面視における断面図を示している。
次に、他の実施形態に係る活性酸素含有水生成装置Bの具体的な構成について図3を参照しながら説明する。なお、以下の活性酸素含有水生成装置Bの説明において、前述した構成と同様の構成に関しては同じ符号を付して説明を省略する。
水中のスーパーオキシドアニオンラジカルの測定は、スーパーオキシドに特異的で一重項酸素にもある程度の反応性を示す化学発光試薬であるウミホタル由来ルシフェリンアナログ(以下CLAと略す)を用い、CLA依存性の化学発光をルミノメータで検出し記録した。
次に、前述のスーパーオキシドアニオンラジカルの生成確認を行なったシステムと同様の循環系において、循環させる水を初期濃度2.5ppmのオゾン水10Lを用いて前述と同様の測定を行なった。活性酸素種生成の前駆物質としてオゾンを大量に含むオゾン水生成には電離法を用いて生成をおこなう株式会社アイ電子社工業製クイックオゾン10を用い、溶存オゾン濃度はインディゴカーミンによる比色法でオゾン濃度を測定した。
(2)SA-Wを添加し、12時間放置後の試料(図中にSA-W 12Hと記載)、(3)SA-W添加後24時間後の試料(図中にSA-W 24Hと記載)、(4)SO-W添加後12時間目の試料(図中にSO-W 12Hと記載)、(5)SO-W添加後24時間目の試料(図中にSO-W 24Hと記載)の結果を示した。このことから明らかなように、刺激により発現レベルが変化しないアクチン遺伝子と比較して、PR1a遺伝子の発現レベルが大きく上昇したことから、SA-WおよびSO-WによってPR1a遺伝子の発現が誘導されたことが示されている。なお、図9では、リーフディスク作成直後のデータを対照実験として示したが、水道水添加によるPR1a遺伝子発現誘導が12時間目、24時間目に起きないことも確認している。
B 活性酸素含有水生成装置
10 反応部
11 超音波振動子
13 給水口
17 セル体
21 電磁波発生装置
25 触媒体
26 螺旋板
27 出水口
29 振動板
31 超音波発振装置
50 第1流路
51 第2流路
52 第3流路
61 螺旋流路
62 吹き抜け空間
Claims (12)
- スーパーオキシドアニオンラジカル、ヒドロキシルラジカル、一重項酸素、含酸素有機ラジカル種の中から選択された時間的に挙動の異なる第1の活性酸素種と第2の活性酸素種とを含有し、これら第1及び第2の活性酸素種は、一方は他方に対して反応性が低く、且つ、長時間保持機能させることができるものであり、同活性酸素種のもつ酸化還元力を植物体の細胞外より植物細胞内へ到達させることで、前記植物細胞内でレドックス反応を惹起し、病原抵抗性遺伝子を発現させる活性酸素含有水。
- 植物に、活性酸素種を含有し長時間保持機能させることのできる活性酸素含有水を接触させて、前記植物が有する病原抵抗性遺伝子の発現を誘導することにより、前記植物の病害を予防する植物病害の予防方法。
- 前記活性酸素含有水は、スーパーオキシドアニオンラジカル、ヒドロキシルラジカル、一重項酸素、含酸素有機ラジカルのうち少なくとも一つの活性酸素を含有し、植物接触手段により植物体の細胞外より植物細胞内へ活性酸素種のもつ酸化還元力を到達させ、吸収された水により植物細胞内で惹起されたレドックス反応により病原抵抗性遺伝子の発現を誘導させることにより、前記植物の病害を予防することを特徴とする請求項2に記載の植物病害の予防方法。
- 前記活性酸素含有水は、スーパーオキシドアニオンラジカル、ヒドロキシルラジカル、一重項酸素、含酸素有機ラジカル種の中から選択された時間的に挙動の異なる第1の活性酸素種と第2の活性酸素種とを含有し、これら第1及び第2の活性酸素種は、一方は他方に対して反応性が低く、且つ、長時間保持機能させることができ、
さらに、前記病害耐性遺伝子を誘導するにあたり、直接的に病原微生物に作用できる第1の活性酸素種を速効させ、次いで、植物での病原抵抗性発現を誘導できる第2の活性酸素種を遅効させながら、前記植物の病害を予防することを特徴とする請求項2に記載の植物病害の予防方法。 - 前記活性酸素種は、水に浸漬した触媒体に、紫外線、超音波振動、可視光線、マイクロ波の中の少なくともいずれか1つを付与して生じさせたものであることを特徴とする請求項2から請求項4に記載の植物病害の予防方法。
- 前記水は、前記活性酸素種の前駆物質となる酸素ガス、オゾンガス、塩素ガス、一酸化窒素ガス、アンモニアガスの中の少なくともいずれか1つを溶存させていることを特徴とする請求項5に記載の植物病害の予防方法。
- 前記触媒体は、酸化チタン(TiO2)、アルミナ(Al2O3)、アルマイト、酸化マグネシウム、水酸化マグネシウム、マグネタイト(Fe3O4)、酸化亜鉛、酸化タングステン、チタン酸バリウム、チタン酸ストロンチウム、チタン酸ナトリウム、二酸化ジルコニウム、酸化タングステン、水酸化タングステン化合物、α‐Fe2O3、硫化カドミウム、硫化亜鉛、白金、銅、パラジウムの金属酸化イオンおよび金属水酸化イオンにより構成された金属、中の少なくともいずれか1つを含有することを特徴とする請求項5または請求項6に記載の植物病害の予防方法。
- 前記触媒体は、粉状または粒子状または繊維状の形状を有していることを特徴とする請求項5〜7に記載の植物病害の予防方法。
- 前記活性酸素含有水は、紫外線の光源を水中に配設し、しかもその紫外線光源の周囲を、一定の間隙を保持して、繊維体よりなる光触媒体で囲繞することにより、水流を、紫外線光源と光触媒体との間隙を通過して上昇または下降する第1水流と、光触媒体の外周を螺旋状に通過して上昇または下降する第2水流と、光触媒体の組織中に流出入する第3水流とより構成した活性酸素含有水生成装置にて生成したものであることを特徴とする請求項2〜7に記載の植物病害の予防方法。
- 請求項2〜9に記載の植物病害の予防方法に使用する活性酸素含有水の生成装置であって、
水供給口と活性酸素含有水取出し口とを備えた容器内に配設された紫外線の光源と、
同紫外線光源の周囲を一定の間隙を保持して囲繞する、繊維体にて形成された光触媒体と、を備え、
容器内に供給された水流を、紫外線光源と光触媒体との間隙を通過して上昇または下降する第1水流と、光触媒体の外周を螺旋状に通過して上昇または下降する第2水流と、光触媒体の組織中に流出入する第3水流とより構成したことを特徴とする活性酸素含有水生成装置。 - 請求項2〜9に記載の植物病害の予防方法に使用する活性酸素含有水の生成装置であって、
紫外線に対して透明な素材で形成され、水供給口と出水口とを備え、内部に触媒体を収容した容器と、
前記水供給口から流入する水の前記容器内での流動方向に超音波を照射する超音波照射部と、
前記容器の周囲に配設され、前記触媒体に対して前記容器の外部から紫外線を照射する紫外線照射部と、を備え、
前記触媒体の少なくとも一部を、前記超音波照射部から照射される超音波の照射領域と、前記紫外線照射部から照射される紫外線の照射領域とが重なる領域に配設したことを特徴とする活性酸素含有水生成装置。 - 前記水供給口から流入した水が前記出水口に向かう際に、前記容器内で流動する方向に対して直交する方向へマイクロ波を照射するマイクロ波照射部を更に備え、
前記触媒体の少なくとも一部を、前記マイクロ波照射部から照射されるマイクロ波の照射領域と、前記超音波照射部から照射される超音波の照射領域と、前記紫外線照射部から照射される紫外線の照射領域とが重なる領域に配設したことを特徴とする請求項11に記載の活性酸素含有水生成装置。
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