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ユカリオットの初期の進化:地質学的視点
1Harvard University, Botanical Museum, Cambridge, MA 02138.
Science (New York, N.Y.)
|May 1, 1992
まとめ
分子フィロゲニーは進化の歴史を明らかにし,初期の生命と酸素増加の地質学的証拠と一致しています. さらなる研究により,地球における初期の多細胞生物の役割が明らかになるかもしれない.
科学分野:
- * 古生物学と分子生物学について
- *地質記録分析による地質記録分析
- * ユカリオット進化
背景:
- * 分子系統学は,真核生物の生物の歴史についての洞察を提供します.
- *これらの進化パターンは,地質学的記録を用いて裏付けることができます.
- * 過去の研究では,生物多様性と大気中の酸素濃度との関連が示唆されている.
研究 の 目的:
- * 分子系統遺伝データを地質記録と統合する.
- * 生命の初期と環境の変化に関する仮説を検証する.
- * 初期の真核生物の多細胞性の性質を調査する.
主な方法:
- * 分子系遺伝子の比較分析.
- * プレカンブリア時代の地質学的記録の調査.
- *生物多様性と大気中の酸素データとの相関.
主要な成果:
- * 分子データは,プレカンブリア期における生物多様性のエピソード的増加の地質学的証拠と一致しています.
- *プレカンブリア時代の岩石は,大気中の酸素濃度の上昇が予測されていることを確認しています.
- * 分子や地質学的記録を完全に統合することは依然として困難です.
結論:
- * 初期の真核生物の進化は,地質学的発見と一致するパターンを示しています.
- * 初期のマクロスコーピック生物の役割は,多細胞性における"絶滅の実験"を表すかもしれない.
- *分子史と地質史を完全に調和させるためにさらなる研究が必要である.
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