Study and Evaluation of Shade-tolerance Characteristics of Five Viburnum Seedlings
In this paper,the seedlings of Viburnum opulus'Roseum',Viburnum brachybotryum,Viburnum awabuki,Viburnum taitoense,and Viburnum plicatum were used as materials,the morphological and physiological indexes such as plant height,crown width,leaf area,leaf rela-tive water content,specific leaf area,soluble sugar content and SOD activity were measured under different shading treatments of full light,shading 53.66% and shading 80.15% .The results showed that the five Viburnum species could adapt to the low light environment through mor-phological changes and physiological responses.The negative tolerance of five Viburnum species was comprehensively evaluated through correla-tion analysis and principal component analysis,and they ranked as follows:Viburnum plicatum>Viburnum awabuki>Viburnum brachybotryum>Viburnum taitoense>Viburnum opulus'Roseum'.