不同砧木锦橙叶片过氧化物酶活性与植株生长结果的关系

Studies on the Relationship Between Peroxidase Activity in Leaves of“Jinchen”Orange Grafted on Different Rootstocks and It’s Growth and Fruit-setting

不同砧木锦橙叶片过氧化物酶（ＰＯＸ）活性存在着差异，半矮化砧上锦橙叶片ＰＯＸ活性显著高于乔化砧，叶片ＰＯＸ活性与树高、干粗、节长、树冠体积等生长势指标呈负相关，与叶片质量、光合强度及果实产量呈正相关。因此，可把叶片ＰＯＸ活性作为砧木对嫁接丰产品种性及矮化性早期预测的辅助生化指标。

The peroxidase(POX)activity in leaves of“Jinchen”orange are diversitv ondifferent rootsrocks.The POX activity in leaves of“Jinchen”orange grafted on semidwarf stocks is signiflcant higher than those grafted on vigorous stocks.The POX activi-ty is in negative correlation with tree height,trunk diameter,nodal length,crown vol-ume etc,while it is in positive correlation with leaf quality,photosynthetic rate andoutput.So,the POX activity in leaves can be used as additional bio-chemical index ofearly prediction either on the high productivity of grafting variety on rootstock or thedwarfing effect。