CO2 抑制皱叶酸模叶片的呼吸作用
CO(2) Inhibits Respiration in Leaves of Rumex crispus L.
机构信息
Department of Agronomy and Range Science, University of California, Davis, California 95616.
出版信息
Plant Physiol. 1992 Feb;98(2):757-60. doi: 10.1104/pp.98.2.757.
Curly dock (Rumex crispus L.) was grown from seed in a glasshouse at an ambient CO(2) partial pressure of about 35 pascals. Apparent respiration rate (CO(2) efflux in the dark) of expanded leaves was then measured at ambient CO(2) partial pressure of 5 to 95 pascals. Calculated intercellular CO(2) partial pressure was proportional to ambient CO(2) partial pressure in these short-term experiments. The CO(2) level strongly affected apparent respiration rate: a doubling of the partial pressure of CO(2) typically inhibited respiration by 25 to 30%, whereas a decrease in CO(2) elicited a corresponding increase in respiration. These responses were readily reversible. A flexible, sensitive regulatory interaction between CO(2) (a byproduct of respiration) and some component(s) of heterotrophic metabolism is indicated.
卷茎蓼（Rumex crispus L.）在温室中用种子种植，环境 CO2 分压约为 35 帕斯卡。然后在环境 CO2 分压为 5 至 95 帕斯卡的条件下测量展开叶片的表观呼吸速率（黑暗中 CO2 的逸出）。在这些短期实验中，计算出的细胞间 CO2 分压与环境 CO2 分压成正比。CO2 水平强烈影响表观呼吸速率：CO2 分压加倍通常会抑制呼吸 25%至 30%，而 CO2 减少则会引起呼吸相应增加。这些反应是可逆的。这表明在呼吸的副产物 CO2 和异养代谢的某些成分（s）之间存在一种灵活、敏感的调节相互作用。
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