二氧化碳对光呼吸的影响。
Effect of carbon dioxide on photorespiration.
作者信息
Bravdo B A
机构信息
The Hebrew University of Jerusalem, Faculty of Agriculture, Department of Horticulture, Rehovot, P.O.B. 12, Israel.
出版信息
Plant Physiol. 1979 Feb;63(2):399-401. doi: 10.1104/pp.63.2.399.
Abstract
The isotopic CO(2) technique for measuring photorespiration was shown to be a valid technique for measuring the unidirectional inward and outward fluxes of CO(2) from a sunflower (Helianthus annuus L.) leaf in the light. The rate of photorespiration was decreased little as the CO(2) concentration was increased from 20 to 1,150 microliters per liter. This finding contradicts the widely held assumption that photorespiration is suppressed at high CO(2) concentrations. Some discussion regarding this apparent conflict is presented.
摘要
用于测量光呼吸作用的同位素二氧化碳（CO₂）技术被证明是一种有效的技术，可用于测量向日葵（Helianthus annuus L.）叶片在光照下CO₂的单向内流和外流通量。当CO₂浓度从20微升/升增加到1150微升/升时，光呼吸速率几乎没有下降。这一发现与广泛持有的假设相矛盾，即光呼吸作用在高CO₂浓度下会受到抑制。文中对这一明显的矛盾进行了一些讨论。
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