Studies on involvements of glycolysis and mitochondrial respiration to CAM photosynthesis

以菠萝和蝴蝶兰石斛为材料，研究了糖酵解和线粒体呼吸对CAM光合作用的影响。丙酮酸Pi双激酶（PPDK）在细胞内的分布可能调节线粒体呼吸中向细胞色素C氧化酶的电子流。此外，糖酵解基因表达的日变化可分为3组，分别与夜间CO2固定和白天苹果酸脱羧有关，而不显示CAM的日变化。特别是3-磷酸甘油醛脱氢酶（GAPDH）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.