水蓮の内部風: アナーロブ性沈殿物の生命への適応

J W Dacey

Science (New York, N.Y.)

|November 28, 1980

まとめ

イエロー・ウォーター・リリーは,圧縮空気システムを用いて,水中に沈んだ根に酸素を運ぶ. 温度と湿度によって引き起こされるこの物理的プロセスは,植物を換気し,重要な生態学的影響を及ぼします.

科学分野:

植物生理学植物生理学
エコロジーエコロジーエコロジー
バイオフィジックス生物物理学

背景:

イエロー・ウォーター・リリー (Nuphar luteum) は,内部にガス空間を持っている.
根や根幹は,無酸素の堆積物の中に埋もれており,酸素の供給が必要です.
プラントには,ガス交換と内部輸送のための効率的なメカニズムが必要です.

研究の目的:

Nuphar luteumの圧縮フロースルーシステムを調査するために.
ガス輸送に起因する物理的プロセスを解明する.
この換気システムの生理学的および生態学的影響を理解するために.

主な方法:

内部ガス空間とそのネットワーク構造の分析.
葉へのガス浸入量と流出量を測定する.
ガス移動を左右する物理的原理の特定 (熱透気流,湿度圧).

主要な成果:

Nuphar luteumは,内部ガス輸送のために圧縮フロースルーシステムを利用しています.
毎日数リットルの空気が,熱転出と湿度圧力を通して若い葉に流入します.
空気は葉片から根幹まで流れ,CO2豊富なガスの逆流が古い葉に流れるのを促進します.

結論:

発電所の内部ガスネットワークは,換気システムとして機能します.
物理的プロセスは,酸素を無酸素の根帯に効率的に輸送する.
このシステムは,Nuphar luteumの生存と機能に重要な生理学的および生態学的影響を及ぼします.

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