Studies on involvements of glycolysis and mitochondrial respiration to CAM photosynthesis

以菖蒲和蝴蝶兰石斛为材料，研究了糖酵解和线粒体呼吸作用对CAM光合作用的影响。似乎丙酮酸Pi二激酶（PPDK）在细胞内的分布调节了线粒体呼吸过程中流向细胞色素C氧化酶的电子流。此外，糖酵解基因表达的日变化分为三组，与夜间CO2固定和白天苹果酸脱羧有关，不显示CAM的日变化。特别是甘油醛3-磷酸（GAPDH）脱氢酶基因表达的日变化与CAM光合作用的日气体交换有关。

Using Ananas comosus and Dendrobium phalaenopisis, involvements of glycolysis and mitochondrial respiration to CAM photosynthesis were studied. It was appeared that the distribution of pyruvate Pi dikinase (PPDK) in the cell regulated the electron flow in the mitochondrial respiration to cytochrome C oxidase. In addition, diurnal changes of glycolysis gene expression were classified to three groups, relating to CO2 fixation in night and decarboxylation of malate in day, and not showing the diurnal changes of CAM. Especially, it was suggested that the diurnal change of glyceraldehyde 3-phosphate (GAPDH) dehydrogenase gene expression related to the diurnal gas exchange of CAM photosynthesis.