摘要： 对14个月生6种离子注入浓度、6个家系的桉树播种苗进行苗期净光合速率(Pn)、蒸腾速率(E)、气孔导度(Gs)、胞间CO2浓度(C i)、光能和水分利用效率(SUE和WUE)测定和分析,结果表明:E、SUE性状在家系间差异显著;Pn、WUE性状在注入浓度间差异达近显著水平;Pn、E性状在不同季节间达极显著水平。研究还表明,6号家系的光能和水分利用效率最高,符合高光效、低水耗特征;N+浓度2×1017/cm2(浓度5)适宜对桉树进行离子注入诱变育种。

关键词: 桉树家系, 苗期, 离子注入, 光合特性

Abstract: "To Pn,E,gs,Ci,SUE,WUE of Eucalyptus family seedlings at 14 months old there were a remarkable difference among the 6 implanting dosages of N+,among 6 families or between seasons by variance analysis.They indicated that:No.6 family with a better SUE and a WUE level was more fit to select the plus tree in the family;the dosage of N+ 2×1017/cm2 was more fit to implant Eucalyptus seeds for mutation;the implanting could improve the photosynthetic level of families to Eucalyptus breeding and improvement. "

Key words: Eucalypts family, Seedling period, N+ - ion-beamimp lanting, Photosynthesis

中图分类号: 

• S792.39