| 河套蜜瓜果实发育过程中糖积累与蔗糖代谢相关酶的关系 |
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| 引用本文： | 张中霞,刘艳,白立华,蔡贵芳.河套蜜瓜果实发育过程中糖积累与蔗糖代谢相关酶的关系[J].西北植物学报,2011,31(1):123-129. |
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| 作者姓名： | 张中霞 刘艳 白立华 蔡贵芳 |
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| 作者单位： | 1. 内蒙古农业大学,农学院,呼和浩特,010019
2. 内蒙古巴彦淖尔农业科学院,内蒙古巴彦淖尔,015400 |
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| 基金项目： | 国家自然科学基金项目(30860180); 内蒙古自然科学基金项目(200711020314) |
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| 摘 要： | 以河套蜜瓜为试材,采用外部形态观测与内部生理指标测定相结合的方法,对其果实发育过程中果实生长模式以及果实中蔗糖、果糖、葡萄糖和淀粉含量以及蔗糖代谢相关酶活性进行测定,以揭示河套蜜瓜果实生长发育过程中糖的代谢积累与相关酶的关系.结果显示:(1)河套蜜瓜果实生长速率呈单"S"曲线,果实发育早期以积累葡萄糖为主,进入成熟期后蔗糖积累量迅速增加,最终由蔗糖和己糖共同构成果实品质.(2)在河套蜜瓜果实成熟期前,蔗糖磷酸合成酶(SPS)活性维持较低水平,进入成熟期后,SPS活性迅速升高;蔗糖合成酶(SS)活性在成熟期前为分解活性大于合成活性,成熟期后表现为合成活性大于分解活性;在整个果实发育期,酸性转化酶(AI)活性较低,中性转化酶(NI)活性始终高于AI.(3)在果实整个发育期,蔗糖含量与蔗糖代谢酶的净活力呈极显著正相关,蔗糖代谢相关酶共同作用决定果实中蔗糖含量.研究表明,在河套蜜瓜果实发育前期,以蔗糖分解代谢为主,且蔗糖合成酶和中性转化酶是催化蔗糖分解的关键酶;果实成熟期间,蔗糖代谢转为合成方向为主,蔗糖合成酶和蔗糖磷酸合成酶在蔗糖积累中起主导作用.
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| 关 键 词： | 河套蜜瓜 糖积累 蔗糖代谢酶 |
Relationship between Sugar Accumulation and Its Metabolizing Enzymes during Muskmelon Fruit Development |
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| ZHANG Zhong-xia,LIU Yan,BAI Li-hua,CAI Gui-fang.Relationship between Sugar Accumulation and Its Metabolizing Enzymes during Muskmelon Fruit Development[J].Acta Botanica Boreali-Occidentalia Sinica,2011,31(1):123-129. |
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| Authors: | ZHANG Zhong-xia LIU Yan BAI Li-hua CAI Gui-fang |
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| Institution: | ZHANG Zhong-xia1,LIU Yan1,BAI Li-hua2,CAI Gui-fang1(1 College of Agronomy,Inner Mongolia Agricultural University,Hohhot 010019,China,2 Inner Mongolia Bayannaoer Academy of Agricultural Sciences,Bayannaoer,Inner Mongolia 015400,China) |
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| Abstract: | The changes of growth phase,sucrose,glucose,fructose,starch and the activities of sugar metabolism-related enzymes in Muskmelon fruit development(Cucumis melo L.cv.Hetao) were determined to study the relationship between the sugar accumulation and its metabolizing enzymes in Hetao.The results indicated that:(1)the growth curves of Hetao showed single sigmoid pattern;The fruit of Hetao mainly accumulated glucose in the early stage;sucrose accumulated rapidly in mature period,finally accumulation of sucrose a... |
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| Keywords: | Cucumis melo L cv Hetao sugar accumulation sucrose metabolism-related enzymes |
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