自然なトウモロコシの変種におけるS/Gリグニン単体比の緯度グラデントの要因
Weiwei Zhu1, Jin Zhang2,3,4, Pradeep Kumar Prabhakar5,6
1Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211.
まとめ
木材について
科学分野:
- 植物生物学
- 森林遺伝学
- 生物化学
背景:
- リグニンの組成は木の適応性と構造的整合性にとって極めて重要です.
- リグニンの生物学的重要性に影響を与える環境的要因は十分に研究されていない.
- リグニンのシリンジル対グアアシル (S/G) の比率は重要な構成特性である.
研究 の 目的:
- Populus trichocarpaのリグニンS/G比の変化の環境要因を調査する.
- 全ゲノム関連研究を用いてリンニン生物合成に関連する遺伝子を特定する.
- リンニンの異質性の適応的意義を理解する.
主な方法:
- Populus trichocarpa群の全ゲノム関連研究 (GWAS)
- 緯度グラデーションにおけるリグニンS/G比の分析
- 細胞壁のラッカゼを含む候補遺伝子の分子分析
主要な成果:
- リグニン生物合成は,多数の関連遺伝子を持つ複合的な多遺伝子特質である.
- S/G比は北から南に大きく増加した.
- 細胞壁のラッカゼの変異は 温暖な気候で S/G比が高くなる
結論:
- リグニンの異質性はPopulus trichocarpaの適応性である.
- 進化の過程は,リンギンの改変を通して,様々な気候条件にモミの木の適応を促します.
- 環境要因,特に温度は,リンニンの組成と遺伝子発現に影響する.
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