【作者】 李庆典； 李颖；

【Author】 Li Qingdian, and Li Ying (Laiyang Agricultural College, Laiyang 265200)

【机构】 莱阳农学院；

【摘要】 在疏花蔷薇果实成熟前,抗坏血酸氧化酶活性急剧下降．多酚氧化酶活性很低,过氧化物酶有一峰值,它促进了果实中还原糖含量的增加;此时果糖含量的峰值便是这一促进作用的体现,而葡萄糖含量的下降则表明用于VC合成的初生物质首先是葡萄糖。至果实成熟时,上述3种氧化酶活性几乎降为0,VC的积累达到最高值。更多还原

【Abstract】 Before ripening of Rosa laxa Retz. hip, ascorbic acid oxidase activity continually reduces. Polyphenol oxidase activity is very low. Peroxidase activity goes to a maximum. It has promoted to increase the contents of reducing sugar . Until the hip has ripened, three kinds of oxidase activity nearly reduce to zero. The contents of vitamin C are increased to a maximum.更多还原