晋北地区耐荫大豆品种筛选及其形态与生理响应研究OA

To achieve more efficient and intensive utilization of land resources and screen high-quality shade-tolerant soybean varieties suitable for cultivation in the North Shanxi Region,this study used 9 soybean varieties as experimental materials and conducted an indoor experiment with three light treatments:100％full natural light(T0),50％shading(T1),and 100％shading(T2).It analyzed the morphological and physiological responses of different soybean varieties under differential light treatments,aiming to screen out soybean varieties suitable for planting in the North Shanxi Region.The results showed that shading significantly increased the plant height and length of the first internode of different soybean varieties,while decreasing leaf area,lignin content,soluble protein content,and soluble sugar content.In contrast,shading increased chlorophyll content,activities of antioxidant enzymes[superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD)],and malondialdehyde(MDA)content.Among the 9 tested varieties,Henong 66,Jidou 29,Hehuang 1,and Heinong 504 exhibited relatively small changes in overall indicators,indicating their strong adaptability under shading stress.The results of correlation analysis showed that under shading stress,soluble protein is the preferred indicator for evaluating changes in soybean lignin content.Comprehensive evaluation of various indicators revealed that Henong 66,Heinong 504,and Jidou 29 are more suitable shade-tolerant soybean varieties for cultivation in the North Shanxi Region.