Response to Light Intensity of Cercidiphyllum japonicum Seedlings
In order to understand the effects of light intensity on growth of Cercidiphyllum japonicum seedlings,one-year-old seedlings were grown under 10%(L1),25%(L2),100%(L3),110%(L4),and 125%(L5)natural light intensity,and the adaptive ability in morphology and physiology of seedlings was studied.The results showed that the increase of plant height,biomass,leaf length,leaf width,and leaf area increased at first and then decreased with the increase of light intensity,and all of them reached the highest under L2.The specific leaf area,leaf water content,and root shoot ratio continued to decrease,while the base diameter increased continuously.The peroxidase activity under L1 and L2 was significantly higher than that under L4 and L5,while the changes in malondialdehyde content was the opposite.With the increase of treatment time,the superoxide dismutase activity under L2 increased at first and then decreased,which under L1 continued to increase and was higher than that under L3,L4 and L5.The contents of total chlorophyll,chlorophyll a and chlorophyll b decreased with the treatment time,and the stronger the light,the lower the content.Therefore,Cercidiphyllum japonicum seedlings could grow under both shade and strong light,and 25%natural light intensity was more suitable.
Cercidiphyllum japonicumSeedlingsLight intensityMorphological indexBiochemical index
万方数据
维普
