难易生根桉树的过氧化物酶活性及其同工酶多型性比较研究

Comparative Study on the Activity and Isoenzymes of Peroxidase in Difficult-and Easy-to-Root Eucalyptus Species

摘要: 尾叶桉ＭＬＡ无性系（简称ＭＬＡ）、尾叶桉Ｕ６无性系（简称Ｕ６）、刚果１２号桉Ｗ５无性系（简称Ｗ５）３个桉树树种中，ＭＬＡ是难生根树种，Ｕ６、Ｗ５是易生根树种。难生根树种的各器官过氧化物酶（ＰＯＤ）活性均高于易生根树种，同一树种不同器官的ＰＯＤ活性及其同工酶不同，不同树种同一器官的ＰＯＤ活性及其同工酶也不同。同一器官的ＰＯＤ活性随组织成熟度的增加而升高。该文讨论了桉树不定根形成与ＰＯＤ的关系。

Abstract: Eucalyptus urophylla S.T.Blade MLA clone(MLA) was difficult to root species. E.urophylla S.T.Blade U 6 clone (U 6) and E.ABL 12 W 5 clone(W 5) were relatively easy to root species. The activity of peroxidase in every organ of MLA was higher than that in U 6 and W 5. The activity and isoenzymes of peroxidase were quite different both in different organs of the same species and in the same organs of different species. The peroxidase activity turned higher with the increasing maturity of the organs. The relationship between the peroxidase and rooting of Eucalyptus cuttings was discussed.