不同蔬菜产品器官抗坏血酸含量与其相关酶活性的关系  

Relation between Ascorbic Acid Contents and Activities of Related Enzymes in Product Organ of Different Vegetable Species

作　　者：李坤[1] 韩道杰[1] 许贞杭[1] 王英华[1] 于贤昌[1] 

机构地区：[1]山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,山东泰安271018

出　　处：《西北农业学报》2008年第5期257-262,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金资助项目(30771473)

摘　　要：以抗坏血酸(AsA)含量差异较大的甜椒、番茄、马铃薯、萝卜和黄瓜的产品器官为试材,研究不同发育期产品器官AsA含量与其相关酶活性的关系。结果表明,5种蔬菜不同发育期产品器官AsA含量与DHAR和GalLDH活性变化趋势基本一致。以5种蔬菜产品器官形成末期AsA含量与其相关酶活性的相关性分析得知,AsA含量与DHAR活性呈显著正相关(r=0.9423,P<0.05),与GalLDH活性的相关性也较显著(r=0.8597,P<0.10);AsA+DHA含量与GalLDH活性相关性明显(r=0.7904,P<0.15)。AsA含量与MDHAR、AAO和APX活性无显著相关性。这说明不同物种蔬菜产品器官AsA含量存在较大差异的原因与其GalLDH和DHAR活性存在较大差异密切相关,MDHAR、AAO和APX活性不是影响AsA含量的主要因素。The product organs of sweet pepper,tomato,potato,radish and cucumber that AsA contents have significant difference were used to investigate the relation between AsA contents and relative enzymes activities at different development stages.The results showed that changes of AsA contents were accordant with GalLDH and DHAR activities in product organs at different development stages.Correlation between AsA contents and relative enzymes activities at anaphase of product organs showed that AsA contents and DHAR activities were significantly positively correlated（r=0.9423,P〈0.05）,AsA contents and GalLDH activities were considerably positively correlated（r=0.8597,P〈0.10）,AsA＋DHA contents had clear pertinence with GalLDH activities（r=0.7904,P〈0.15）,but AsA contents had no clear pertinence with MDHAR,AAO and APX activities.It is proposed that AsA contents were strongly affected by the GalLDH and DHAR activities,but MDHAR,AAO and APX activities were not the main factors in influencing the AsA contents in product organs of different vegetable species.

关 键 词：蔬菜 产品器官 抗坏血酸含量 半乳糖内酯脱氢酶 脱氢抗坏血酸还原酶 

分 类 号：S63[农业科学—蔬菜学]