Effects of color films shading on Phellodendron amurense seedlings biomass and primary nitrogen-assimilation enzyme activities
滤光膜对黄檗幼苗生物量及初级氮同化酶活性的影响

In this paper, greenhouse Phellodendron amurense seedlings were shaded with red, yellow, blue, and green films for 100 days, and their bio,nass, chlorophyll and soluble protein contents, and nitrate reductase and glutamine synthetase activities were determined. Compared with exposure under sunlight, color fihns shading decreased the seedlings biomass significantly. Plant height and stem diameter had the similar trend with plant biomass. Root/ shoot ratio was less affected by red and yellow films shading, while root biomass was decreased significantly under blue and green films shading. Leaf chlorophyll content was increased significantly under the shading with blue, green and red films, especially with blue film. Red film shading increased the chlorophyll a/b ratio, while blue film shading was in adverse. Under color films shading, soluble protein content and nitrate reductase and glutamine synthetase activities were significantly higher than the control.