Organisms must obtain the substances they need from the outside world to maintain themselves and their species. Green plants have the ability to synthesize all the organic substances they need using the energy of light, so they only need to be provided with carbon dioxide and inorganic salts containing N, K, P, etc., but many microorganisms and animals require a variety of organic compounds and inorganic salts to obtain the energy for vital activities and the materials for their body components. The type of nutrients an organism requires is determined by that organism's ability to utilize and synthesize substances. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
生物が個体と種の維持のために必要な物質を外界から摂取しなければならないこと。緑色植物は光のエネルギーを利用して必要なすべての有機物質を合成する能力があるので,二酸化炭素とN,K,Pなどを含む無機塩類が与えられればよいが,多くの微生物や動物は生命活動のエネルギーと体構成物質の材料を得るために種々の有機化合物や無機塩類を要求する。ある生物がどのような栄養物質を要求するかは,その生物の物質利用能力と合成能力によってきまる。
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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