浸水反応回路における進化的柔軟性
Mauricio A Reynoso1, Kaisa Kajala2,3,4, Marko Bajic5,6
1Center for Plant Cell Biology, Botany and Plant Sciences Department, University of California, Riverside, CA, USA.
Science (New York, N.Y.)
|October 12, 2019
まとめ
遺伝子制御ネットワークは 植物は洪水から生き残るのに役立ちます この研究では,4つの植物におけるクロマチンのアクセシビリティと遺伝子発現を分析し,浸水によって活性化される保存された遺伝子と調節要素を発見し,湿地作物の適応特性を明らかにした.
科学分野:
- 植物生物学
- ゲノミクス
- エコロジー
背景:
- 洪水のような極端な天候現象は,世界の作物生産と自然生態系に重大な脅威をもたらします.
- 浸水に対する植物の反応を理解することは 回復力のある作物の開発と 生物多様性の保全に不可欠です
研究 の 目的:
- 潜水によって活性化される遺伝子調節ネットワークの多様性を研究する.
- 洪水によるストレス下での保存された種特有の遺伝子調節メカニズムを特定する.
主な方法:
- クロマチンのアクセシビリティと遺伝子発現の高解像度分析
- 水の利用可能性 (乾地から湿地まで) に異なる適応を持つ4つのアニオスペルムの比較ゲノミクス.
- cis 調節要素と転写因子結合部位の分析
主要な成果:
- 4つの転写因子ファミリーによって調節される保存された潜水活性化遺伝子群が特定された.
- 合成遺伝子と非合成遺伝子の両方とも,シスモチーフとクロマチンのアクセシビリティが潜水反応に関連していた.
- 浸水反応のための規制回路は,ユーディコットとモノコットに保存されます.
結論:
- 特定のシスモチーフの頻度,クロマチンのアクセシビリティ,潜水活性化の程度は種によって異なります.
- 特に湿地の作物におけるこれらの変動は,洪水から生き残るための適応的重要性を示唆しています.
- この研究は 植物の洪水への適応の 遺伝的基盤についての洞察を提供します
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