不同时期采收的草莓果实糖含量差异的代谢机理  

Difference in Sugar Content of Fruit Harvested in Different Month Strawberry(Fragaria×ananassa Duch‘Tochiotome’)and Its Relation to Sucrose Metabolism

作　　者：陈俊伟[1] 谢鸣[1] 蒋桂华[1] 秦巧平[1] 徐红霞[1] 程建徽[1] 吴江[1] 

机构地区：[1]浙江省农业科学院园艺研究所,杭州310021

出　　处：《园艺学报》2007年第5期1147-1150,共4页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(30370998);浙江省自然科学基金项目(302389)

摘　　要：以促成栽培的‘枥乙女’草莓为试材,分析了不同月份采收的果实糖含量和蔗糖代谢相关酶活性的变化。结果表明,不同时期采收的草莓果实糖含量有差异,成熟果实的总糖和蔗糖含量以2月份采收的最高,1月份次之,4月份最低;不同月份果实糖含量不同主要由蔗糖含量的差异引起。2月份果实的蔗糖磷酸合酶(SPS)、蔗糖合酶(SS)合成方向活性显著高于1月份,而转化酶活性显著低于1月份,这样有利于2月份成熟果实的蔗糖积累。4月份成熟果实的SS(合成方向)、SPS和酸性转化酶(AI)活性水平均与2月份相近,但此时果实仍不能积累蔗糖,表明4月份草莓果实不能积累蔗糖与糖代谢关系不密切。　Sugar accumulation and sucrose metabolism enzyme activities of strawberry fruits harvested in different month were measured by using forcing culture‘Tochiotome’strawberry cultivar at various developmental stages. The results showed that the sugar content was different among fruits harvested in different month. The contents of total sugar and sucrose in fruits harvested in February were highest, followed by January, whereas lowest in April. The difference of sugar content in fruits harvested in different month was mainly attributed to the difference in its sucrose concentration. The activities of sucrose phosphate synthase（SPS） and sucrose synthase（SS）synthetic direction in fruits harvested in February were significantly higher than those in January, whereas the acid invertase activity in fruits maturated in February was significantly lower than that in January. This profile of sucrose-metabolizing enzymes is favorable to sucrose accumulation for fruit harvested in February. Although the level of invertase activity and sucrose synthetic activities（SPS and SS-synthetic direction）in fruit harvested in April was still equal to that in February, sucrose accumulation in fruit harvested in April was still much lower than that in February. The results indicated lack of sucrose accumulation in fruit harvested in April may not relate to sucrose metabolism.

关 键 词：草莓 促成栽培 果实 糖积累 蔗糖代谢 

分 类 号：S668.4[农业科学—果树学]