氧气对离体叶片光合作用、光呼吸和呼吸作用的影响。I. 大豆
Effect of oxygen on photosynthesis, photorespiration and respiration in detached leaves. I. Soybean.
作者信息
Forrester M L, Krotkov G, Nelson C D
机构信息
Department of Biology, Queen's University, Kingston, Ontario.
出版信息
Plant Physiol. 1966 Mar;41(3):422-7. doi: 10.1104/pp.41.3.422.
The effect of O(2) on the CO(2) exchange of detached soybean leaves was measured with a Clark oxygen electrode and infrared carbon dioxide analysers in both open and closed systems.The rate of apparent photosynthesis was inhibited by O(2) while the steady rate of respiration after a few minutes in the dark was not affected. Part of the inhibition of apparent photosynthesis was shown to be a result of increased photorespiration. This stimulation of photorespiration by O(2) was manifested by an increase in the CO(2) compensation point.The differential effects of O(2) on dark respiration (no effect) and photorespiration (stimulation) indicated that these were 2 different processes.Moreover the extrapolation of the CO(2) compensation point to zero at zero O(2) indicated that dark respiration was suppressed in the light at least at zero O(2) concentration.
在开放和封闭系统中，使用克拉克氧电极和红外二氧化碳分析仪测量了氧气（O₂）对离体大豆叶片二氧化碳（CO₂）交换的影响。表观光合作用速率受到氧气的抑制，而黑暗中几分钟后的稳定呼吸速率不受影响。表观光合作用的部分抑制被证明是光呼吸增加的结果。氧气对光呼吸的这种刺激表现为二氧化碳补偿点的增加。氧气对暗呼吸（无影响）和光呼吸（刺激）的不同影响表明这是两个不同的过程。此外，在零氧气浓度下将二氧化碳补偿点外推至零表明，至少在零氧气浓度下，光照会抑制暗呼吸。
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