氧浓度对荞麦幼苗呼吸中间产物水平的一些影响。
Some effects of oxygen concentration on levels of respiratory intermediates in buckwheat seedlings.
作者信息
Effer W R, Ranson S L
机构信息
Department of Botany, University of Newcastle upon Tyne, Newcastle upon Tyne, England.
出版信息
Plant Physiol. 1967 Aug;42(8):1053-8. doi: 10.1104/pp.42.8.1053.
Changes in levels of glycolytic and some related respiratory intermediates in young seedlings of buckwheat (Fagopyrum esculentum) following transfer A) from air to anoxia, B) from air to 1.5% O(2), C) from 1.5% O(2) to anoxia and D) from anoxia to air, are recorded and discussed in relation to other measurements made with these seedlings.On transfer from air to anoxia the changes are similar to those recorded for pea seeds in which it is inferred that glycolysis is faster in anoxia than in air. The results with buckwheat however can be explained in terms of a decreased rate of glycolysis in anoxia. An alternative hypothesis is developed which states that glycolysis is faster in anoxia than in air and that it is the contribution of the pentose phosphate cycle to the total respiratory catabolism which decreases as the oxygen concentration is reduced towards zero.
记录并讨论了荞麦（苦荞麦）幼苗在以下转移情况下糖酵解及一些相关呼吸中间产物水平的变化：A）从空气转移至缺氧环境，B）从空气转移至1.5%氧气环境，C）从1.5%氧气环境转移至缺氧环境，D）从缺氧环境转移至空气环境，并将这些变化与对这些幼苗进行的其他测量结果相关联。从空气转移至缺氧环境时，变化与豌豆种子中记录的变化相似，据推测豌豆种子在缺氧环境中糖酵解比在空气中更快。然而，荞麦的结果可以用缺氧环境中糖酵解速率降低来解释。提出了另一种假设，即糖酵解在缺氧环境中比在空气中更快，并且随着氧气浓度降至零，戊糖磷酸循环对总呼吸分解代谢的贡献会降低。
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