Nitrate reductase activity and its diurnal variation rhythm for Camptotheca acuminata seedlings

编号 zgly0000345296

文献类型 期刊论文

文献题名 Nitrate reductase activity and its diurnal variation rhythm for Camptotheca acuminata seedlings

作者 SUNShi-qin  YANXiu-feng 

作者单位 CollegeofLifeSciences 

母体文献 Journal of Forestry Research;林业研究: 英文版 

年卷期 2004,15(3)

页码 167-170

年份 2004 

分类号 Q946.5 

关键词 喜树  幼苗  硝酸还原酶  酶活性  叶片 

文摘内容 Nitrate reductase activity (NRA) in different plant organs and leaves in different positions of Camptotheca acuminata seedlings was determined by an In vivo assay, the diurnal variation rhythm of NRA in leaves of different positions was observed,and the correlations between leaf NRA, leaf area and lamina mass per unit area (LMA) were also examined. The results showed that NRA in the leaf was significantly highest, compared with that in other organs such as roots, stems and leaves. In this experiment, the 10 leaves were selected from the apex to the base of the seedlings in order. The different NRA occurred obviously in leaves of different positions of C. acuminata seedlings from the apex to the base, and NRA was higher in the 4th-6th leaves.The diurnal change rhythm of leaf NRA showed a one peak curve, and maximum NRA value appeared at about midday (at 12:30 or so). No obvious correlations between NRA and leaf area or lamina mass per unit area were observed. This study offered scientific foundation for the further research on nitrogen metabolism of C. acuminata。