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伝統的な米からのタンパク質キナーゼPstol1は,欠乏症に対する耐性を授与します
Rico Gamuyao1, Joong Hyoun Chin, Juan Pariasca-Tanaka
1International Rice Research Institute, DAPO Box 7777 Metro, Manila 1301, Philippines.
Nature
|August 24, 2012
まとめ
天然のリンが限られているため,リン効率の良い作物の開発は極めて重要です. 米におけるPSTOL1遺伝子の過剰発現は,根の成長を促進することによって,が不足する土壌での穀物の収穫量を大幅に増加させます.
科学分野:
- 農業科学 農業科学とは
- 植物遺伝学 植物遺伝学
- 分子生物学は分子生物学である.
背景:
- は植物の成長に不可欠なマクロ栄養素ですが,天然備蓄は限られています.
- 持続可能な農業には,高リン量作物の開発が不可欠である.
- 米におけるリン酸欠乏耐性に対するPup1定量特性の位置 (QTL) は以前から特定されていたが,そのメカニズムは不明であった.
研究 の 目的:
- Pup1 QTL.内の機能的な遺伝子を特定するために.
- 米のリン酸欠乏耐性におけるこの遺伝子の役割を調査する.
- この遺伝子が低リン環境で米の生産性を向上させる可能性を評価する.
主な方法:
- 候補遺伝子を特定するためにPup1 QTL領域の配列決定.
- 特定された遺伝子 (PSTOL1) の過剰発現が,不耐性,飢餓不耐性米の品種で確認されました.
- 植物成長,根の発達,そして,リン不足の条件下での穀物収穫の評価.
主要な成果:
- Pup1 QTLには,タンパク質キナーゼ遺伝子であるリン酸飢餓耐性1 (PSTOL1) という遺伝子が含まれています.
- PSTOL1は,米のリファレンスゲノムと不耐性品種に含まれていません.
- PSTOL1の過剰発現は,早期の根の成長を促すことで,リン不足の土壌での穀物収穫を大幅に増加させた.
- PSTOL1は,リンやその他の栄養素の吸収を促進します.
結論:
- PSTOL1は,Pup1 QTL.によって授与されるリン酸欠乏症の耐性に対して責任を負う機能的な遺伝子です.
- PSTOL1は,早期の根の成長を促すことで,の吸収を高めます.
- 伝統的な米の生殖プラズマを保存することは,PSTOL1.1のような貴重な遺伝子を特定するために重要です.
- 現代の米の品種にPSTOL1の侵入は,アジアとアフリカの低リン基の土壌での作物の生産性を向上させることができます.
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