JP6249683B2 - 乳管特異的プロモーターの評価方法 - Google Patents
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- JP6249683B2 JP6249683B2 JP2013175889A JP2013175889A JP6249683B2 JP 6249683 B2 JP6249683 B2 JP 6249683B2 JP 2013175889 A JP2013175889 A JP 2013175889A JP 2013175889 A JP2013175889 A JP 2013175889A JP 6249683 B2 JP6249683 B2 JP 6249683B2
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Landscapes
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Description
(1) プロモーターの乳管特異性を評価する方法であって、ジャスモン酸又はその誘導体を用いて刺激することにより、乳管形成を促進したパラゴムノキ(Hevea brasiliensis)の茎に、評価対象であるプロモーターの下流に蛍光タンパク質をコードする遺伝子を組み込んだ発現ベクターを導入した後、前記蛍光タンパク質の発現部位を確認し、
前記ジャスモン酸又はその誘導体が、下記一般式(1)
で表される化合物であることを特徴とするプロモーターの乳管特異性評価方法、
(2) 前記パラゴムノキが、茎長が40cm〜1.5mに生育した実生苗又はクローン苗であることを特徴とする前記(1)記載のプロモーターの乳管特異性評価方法、
(3) 前記パラゴムノキの茎を切断し、その切断面から前記発現ベクターを導入することを特徴とする前記(1)又は(2)記載のプロモーターの乳管特異性評価方法、
(4) 前記パラゴムノキの茎から形成層を剥離し、その剥離面から前記発現ベクターを導入することを特徴とする前記(1)又は(2)記載のプロモーターの乳管特異性評価方法、
(5) 前記発現ベクターの導入を、パーティクルガン法により行うことを特徴とする前記(1)〜(4)のいずれか記載のプロモーターの乳管特異性評価方法、及び
(6) 前記ジャスモン酸の誘導体が、プロヒドロジャスモンであることを特徴とする前記(1)〜(5)のいずれか記載のプロモーターの乳管特異性評価方法、
を提供することを目的とする。
R1のアルキル基としては、炭素数1〜20のアルキル基であることが好ましく、炭素数1〜6のアルキル基であることがより好ましい。具体的には、メチル基、エチル基、n−プロピル基、イソプロピル基、n−ブチル基、イソブチル基、s−ブチル基、tert−ブチル基、n−ペンチル基、イソペンチル基、2−メチルブチル基、ネオペンチル基、1−エチルプロピル基、n−ヘキシル基、イソヘキシル基、4−メチルペンチル基、3−メチルペンチル基、2−メチルペンチル基、1−メチルペンチル基、3,3−ジメチルブチル基、2,2−ジメチルブチル基、1,1−ジメチルブチル基、1,2−ジメチルブチル基、1,3−ジメチルブチル基、2,3−ジメチルブチル基、2−エチルブチル基等が挙げられる。
R1のシクロアルキル基としては、炭素数3〜20のシクロアルキル基であることが好ましく、炭素数3〜8のモノシクロアルキル基、炭素数4〜10のポリシクロアルキル基であることがより好ましい。具体的には、シクロプロピル基、シクロブチル基、シクロペンチル基、シクロヘキシル基、シクロヘプチル基、シクロオクチル基、ノルボルニル基、アダマンチル基等が挙げられる。
R1のアルケニル基としては、炭素数2〜20のアルケニル基であることが好ましく、炭素数2〜6のアルケニル基であることがより好ましい。具体的には、ビニル基、アリル基、2−ブテニル基、3−ブテニル基、イソブテニル基、1−ペンテニル基、2−ペンテニル基、3−ペンテニル基、4−ペンテニル基、3−メチル−2−ペンテニル基、2−ヘキセニル基、3−ヘキセニル基、5−ヘキセニル基等が挙げられる。
R1のアルキニル基としては、炭素数2〜20のアルキニル基であることが好ましく、炭素数2〜6のアルキニル基であることがより好ましい。具体的には、エチニル基、1−プロピニル基、2−プロピニル基、ブチニル基、ペンチニル基、ヘキシニル基等が挙げられる。
R1のアリール基としては、炭素数6〜10のアリール基であることが好ましい。具体的には、フェニル基、1−ナフチル基、2−ナフチル基、トリル基、キシリル基等が挙げられる。
また、R2の炭化水素基は、1又は2以上の水素原子が、水酸基、アルキルオキシ基、スルホニル基、スルホキシ基、ニトロ基、アミノ基等により置換されていてもよい。このような置換基を有する炭化水素基として、ヒドロキシエチル基、ジヒドロキシプロピル基等のヒドロキシアルキル基、メトキシエチル基等のアルキルオキシアルキル基等が挙げられる。
例えば、上記式(1)において、R1がアルキル基、アルケニル基、又はアルキニル基であり、かつR2がアルキル基である化合物は、2−アルキルシクロペンテン−1−オン、2−アルケニルシクロペンテン−1−オン、又は2−アルキニルシクロペンテン−1−オンとマロン酸のアルキルエステルとをマイケル付加させた後、脱炭酸させることにより容易に得ることができる。また、このようにして製造した化合物に対して、常法に従いアルコール類とエステル交換させてもよい。その他、上記式(1)において、R2が水素原子である化合物は、例えば、上記のように合成したR2がアルキル基である化合物を、塩基又は酸で加水分解することにより得ることができる。
<発現ベクターの構築>
図1に示すような、REFプロモーター(REF pro)の下流にGFP遺伝子(sGFP)をつなぎ、さらにノパリン合成酵素遺伝子のターミネーター(NOS ter)をつないだGFP発現カセットと、ノパリン合成酵素遺伝子のプロモーター(NOS pro)の下流にカナマイシン耐性遺伝子(NPT II)をつなぎ、さらにノパリン合成酵素遺伝子のターミネーターをつないだカナマイシン耐性遺伝子発現用カセットと、カリフラワーモザイクウイルス35Sプロモーター(35S pro)の下流にハイグロマイシン遺伝子(HPT)をつなぎ、さらにノパリン合成酵素遺伝子のターミネーターをつないだハイグロマイシン耐性遺伝子発現用カセットとを有する発現ベクター(PBIsGFP(S65T))を構築した。なお、図1中、「I」は、イントロンを意味する。
パラゴムノキを、プロヒドロジャスモンを用いて刺激し、乳管形成を促進させた。
具体的には、ジャスモメート液剤(明治製菓株式会社製)を、1%CMC溶液を用いて希釈し、50倍希釈溶液(0.1%プロヒドロジャスモン溶液)を調製した。なお、ジャスモメート液剤の組成は、以下の通りである;5%プロヒドロジャスモン、33%1−プロパノール、30%界面活性剤、及び32%水。
調製した0.1%プロヒドロジャスモン溶液を、茎長が1mにまで成育させた実生苗の茎表面に、0.1mL/cm2となるように、2ヶ月間にわたり2週間ごとに1回(合計4回)、刷毛を用いて塗布した。
プロヒドロジャスモンを塗布した実生苗の先端部を切断し、切断面に、表面に発現ベクターをコートした金粒子を、遺伝子導入装置(タナカ社製、製品名:IDERA)を用いて打ち込んだ。その後、28℃の隔離温室下で育成した。
発現ベクターを導入した部位の茎組織の断面を顕微鏡で観察した。観察条件は以下の通りである。
(顕微鏡)
Nikon ECLIPSE E600(フィルター)
EX460−500
DM505
BA 510−560(ライト)
Nikon INTENSLIGHT C−HGFI
Claims (6)
- 前記パラゴムノキが、茎長が40cm〜1.5mに生育した実生苗又はクローン苗であることを特徴とする請求項1記載のプロモーターの乳管特異性評価方法。
- 前記パラゴムノキの茎を切断し、その切断面から前記発現ベクターを導入することを特徴とする請求項1又は2記載のプロモーターの乳管特異性評価方法。
- 前記パラゴムノキの茎から形成層を剥離し、その剥離面から前記発現ベクターを導入することを特徴とする請求項1又は2記載のプロモーターの乳管特異性評価方法。
- 前記発現ベクターの導入を、パーティクルガン法により行うことを特徴とする請求項1〜4のいずれか一項に記載のプロモーターの乳管特異性評価方法。
- 前記ジャスモン酸の誘導体が、プロヒドロジャスモンであることを特徴とする請求項1〜5のいずれか一項に記載のプロモーターの乳管特異性評価方法。
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