植物中的草酸:合成、降解及其积累调控  

The Oxalic Acid in Plants: Biosynthesis, Degradation and Its Accumulation Regulation

作　　者：蔡晓锋[1] 徐晨曦[1] 王小丽[1] 葛晨辉[1] 王全华[1] 

机构地区：[1]上海师范大学生命与环境科学学院,植物种质资源开发协同创新中心,上海200234

出　　处：《植物生理学报》2015年第3期267-272,共6页Plant Physiology Journal

基　　金：上海市协同创新中心项目(ZF1205)

摘　　要：草酸是植物体内一种简单的二元酸,在植物中广泛分布,具有重要的生理功能。然而草酸作为一种抗营养素,大量食用含草酸的蔬菜可以显著影响矿物元素的吸收和增加患肾结石的风险。植物中草酸的合成有三条途径,即乙醛酸/乙醇酸途径、抗坏血酸途径和草酰乙酸合成途径;草酸的降解也有三种方式,即经过氧化、脱羧和乙酰化作用最终生成CO2。植物草酸的积累受品种和施肥及种植季节等农艺管理技术的影响。Oxalic acid （OA）, the smallest （two-carbon） dicarboxylic acid, is broadly distributed in plants and has various physiological functions. However, oxalic acid is an antinutrient, and excessive consumption of oxalate-rich foods inhibits mineral absorption and increases risk of some diseases such as kidney stones in the digestive system. It has been proposed that oxalic acid is biosynthesized via three pathways, namely glyoxylate/ glycolate, ascorbate and oxaloacetate. The degradation of oxalate occurs through oxidation, decarboxylation and acetylation. Besides, the accumulation of oxalic acid is affected by varieties and agronomic measurements.

关 键 词：植物 草酸 乙醛酸 草酰乙酸 农艺技术 

分 类 号：Q946[生物学—植物学]