红檵木叶色变化的生理生化研究  

Changes of Physiology and Biochemistry during Leafcolor Transformation in Loropetalum chinense var. rubrum

作　　者：唐前瑞[1] 陈德富[2] 陈友云[3] 张宏志[1] 周朴华[4] 

机构地区：[1]湖南农业大学园艺园林学院,长沙410128 [2]南开大学生物化学与分子生物学系,天津300071 [3]湖南农业大学科技处,长沙410128 [4]湖南农业大学理学院,长沙410128

出　　处：《林业科学》2006年第2期111-115,共5页Scientia Silvae Sinicae

基　　金：国家教育部高等学校骨干教师资助计划项目[教技司(00)65号]。

摘　　要：In order to understand the physiological and biochemical reasons of leafcolor transformation in Loropetalum chinense var. rubrum,three types of L. chinense var. rubrum, Zihei (black purple), Zihong(red purple)and Hongzhe(red_ochre), and L. chinense were taken as materials. The contents of chlorophyll, carotenoid and soluble sugar, and activity of phenylalanine ammonialyase (PLA) in the leaves were measured from early March to June. The results showed that the contents of chlorophyll, carotenoid and soluble sugar increased gradually during the leafcolor changing from red to green, but there were obviously differences among types of Zihei, Zihong and Hongzhe. Anthocyanins contents in Zihe and Zihong leaves maintained high level, so their leaves still kept red when they got mature in early June. Phenylalanine ammonialyase (PLA) activity decreased, and had positive relationship with anthocyanin contents. Some measures such as shading or watering to lower air temperature could be taken to maintain leaves of L. chinense var. rubrum fresh red during summer.In order to understand the physiological and biochemical reasons of leafcolor transformation in Loropetalum chinense vat. rubrum,three types of L. chinense var. rubrum, Zihei （black purple）, Zihong（red purple）and Hongzhe（red-ochre）, and L. chinense were taken as materials. The contents of chlorophyll, carotenoid and soluble sugar, and activity of phenylalanine ammonialyase （PLA） in the leaves were measured from early March to June. The results showed that the contents of chlorophyll, carotenoid and soluble sugar increased gradually during the leafcolor changing from red to green, but there were obviously differences among types of Zihei, Zihong and Hongzhe. Anthocyanins contents in Zihe and Zihong leaves maintained high level, so their leaves still kept red when they got mature in early June. Phenylalanine ammonialyase （PLA） activity decreased, and had positive relationship with anthocyanin contents. Some measures such as shading or watering to lower air temperature could be taken to maintain leaves of L. chinense var. rubrum fresh red during summer.

关 键 词：红檵木 叶绿素 类胡萝卜素 花色素苷 可溶性糖 苯丙氨酸解氨酶 叶色 

分 类 号：S718.43[农业科学—林学]