柑橘果实有机酸代谢研究进展  

Advances in research on the metabolism of organic acids in citrus fruits

作　　者：赵淼[1] 吴延军[1] 蒋桂华[1] 谢鸣[1] 林毅[2] 蔡永萍[2] 

机构地区：[1]浙江省农业科学院园艺研究所,杭州310021 [2]安徽农业大学生命科学学院,合肥230036

出　　处：《果树学报》2008年第2期225-230,共6页Journal of Fruit Science

基　　金：浙江省重大科技项目(2005C12013-01)

摘　　要：柑橘果实中有机酸含量是决定果实品质好坏的重要指标之一,降低果实中有机酸含量提高果实品质一直是人们研究的一个热点及难点。综述了柑橘果实中柠檬酸的合成与降解、柑橘果实中有机酸代谢相关酶、柑橘果实柠檬酸的跨膜运输及柑橘果实有机酸的调控等方面内容。尤其是柠檬酸新的降解途径、柠檬酸跨膜运输时液泡内外柠檬酸盐的动静态平衡和分子方面给出了国内外最新研究进展,推测柑橘果实发育后期柠檬酸的急剧下降可能是由于其参与了GABA途径并最终代谢成氨基酸而导致的;详细介绍了柠檬酸离子与氢离子在液泡内外转运的模型。最后总结讨论了柑橘果实有机酸调控的思路,提出了今后的研究方向、思路和需要解决的问题。The content of organic acid in citrus fruit is one of the important guidelines deciding the quality of fruit. Reducing the content of organic acid and improving the quality is the hotspot and nodus in research. In this paper the following items, such as anabolism and degradation of citric acid ; some related enzymes ; the transport of organic acid ; measures regulating organic acid content, especially, the latest development in the field of a new utilization of citric acid, citrate homeostasis in citrus juice sac ceils and molecular biology, are reviewed. It is speculated that citric acid might participate in the metabolism of amino acid and results in the serious degradation of citric acid. A transport model of citrate^3- and H^＋ is introduced. Finally, the method of regulating organic acid of citrus fruit is discussed and the directions, method and some problems on organic acid metabolism are outlined.

关 键 词：柑橘 果实 有机酸 代谢 酶 调控 

分 类 号：S666[农业科学—果树学]