Photorespiration

Japanese: photorespiration
Photorespiration

…Currently, more than 300 species (most of which are succulent) from 112 genera, including Crassulaceae, Cactaceae, and Ananasidae, are known as CAM plants. The process in which glycolic acid derived from the Calvin cycle is oxidized and decomposed by the glycolic acid pathway under light is called photorespiration. RuBPC also has oxygenase activity (called ribulose-1,5-bisphosphate carboxylase/oxygenase RuBisCO), and produces phosphoglycolic acid (Figure 5). …

From [Breathing]

...(Figure 5) and may be dehydrogenated again to become succinic acid. The oxidative decomposition of glycolic acid that takes place in green tissues under light is called photorespiration, but it has a physiologically different meaning from traditional respiration because it does not produce ATP. In the final part of the respiration process, the pathway that transfers electrons from NADH and succinic acid to molecular oxygen is called the electron transport system or respiratory chain (Figure 6).

*Some terminology explanations that mention "photorespiration" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…現在,ベンケイソウ科のほかサボテン科,アナナス科などの112属300種余り(多肉のものが多い)がCAM植物として知られている。 光のもとでカルビン回路に由来するグリコール酸が,グリコール酸経路により酸化分解される過程を光呼吸photorespirationという。RuBPCはオキシゲナーゼ活性もそなえており(リブロース‐1,5‐二リン酸カルボキシラーゼ/オキシゲナーゼRuBisCOと呼ばれる),ホスホグリコール酸を生じる(図5)。…

【呼吸】より

…図5)へ入りもう一度脱水素されたのちコハク酸となる場合がある。緑色組織で光のもとで行われるグリコール酸の酸化的分解は光呼吸photorespirationと呼ばれるが,ATP生成がないから本来の呼吸とは生理学的な意味が異なる。 呼吸過程の最後の部分で,NADHやコハク酸から電子を分子状酸素に渡す経路を電子伝達系または呼吸鎖という(図6)。…

※「photorespiration」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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