世代を超えた可塑性は,野生では適応性がある
Laura F Galloway1, Julie R Etterson
1Department of Biology, University of Virginia, Charlottesville, VA 22904-4328, USA. lgalloway@virginia.edu
まとめ
親植物は,光環境のシグナルを子孫に伝達し,その生命史に影響を与えることができます. この世代を超えた可塑性は,変化する光条件下での植物の適性を高めます.
科学分野:
- 植物生物学 植物生物学
- エコロジー エコロジー エコロジー
- 進化生物学の進化生物学について
背景:
- 植物は,光の利用可能性を含む環境条件に適応する.
- 子孫の特徴に対する親の環境の影響 (世代を超えた可塑性) は,いくつかの種で知られている.
- 子孫の生命史の形成における母子の光環境の役割はよく理解されていません.
研究 の 目的:
- 母の光の環境が子孫の生命史の特徴に影響を与えるかどうかを調査する.
- この世代を超えた可塑性が適応性があるかどうかを判断する.
- 人口の成長と健康に対する母子の影響の影響を評価する.
主な方法:
- 制御された実験で,母なる植物を異なる照明環境 (下層と照明ギャップ) にさらした.
- 制御された条件下でこれらの母親から成長する子孫を生命史 (年次/二年次) を評価するために育てる.
- 世代を超えた可塑性のフィットネス効果を推定するために,人口増加をモデル化.
主要な成果:
- 子孫の生命史 (年1回 vs. 2年1回) は,母親の光の環境によって著しく影響を受けました.
- この可塑性は,子孫が母親と同じ照明条件を経験したとき,適応的であった.
- 母性効果によって調理された植物は,調理されていない植物と比較して3.4倍のフィットネスを示しました.
結論:
- 母親の光の環境は,子孫の生命史のヒントとして機能します.
- 光に反応する世代を超えた可塑性は,植物の適応戦略である.
- このメカニズムは,静止生物が環境の異質性に対処することを可能にします.
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