…As a result of evolution based on bacterial photosynthesis, green plant photosynthesis, which uses water, which is abundant on Earth, as a hydrogen donor, appeared about 1 billion years ago, leading to the appearance of O 2 on Earth. The number of CO 2 molecules fixed or O 2 molecules generated by one light quantum is called the quantum yield of photosynthesis, and the reciprocal of this is called the quantum requirement of photosynthesis. OH Warburg once advocated a value of 4 (four-light quantum theory) for the required quantum number, but a value of 8 to 10 is now generally accepted. … *Some of the terminology that refers to "quantum requirement of photosynthesis" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…細菌型光合成を基礎として進化の結果,地球上に豊富に存在する水を水素供与体とする緑色植物型の光合成が約10億年前に出現し,地球上にO2の出現をもたらした。 1個の光量子によって,固定されるCO2または発生するO2の分子数を光合成の量子収量quantum yield of photosynthesisといい,この逆数を光合成の要求量子数quantum requirement of photosynthesisという。要求量子数として,かつてO.H.ワールブルクは4という値(4光量子説)を主張したが,現在では8~10という値が一般に受け入れられている。… ※「quantum requirement of photosynthesis」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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