遮荫和红膜处理对高山红景天根生物量及红景天甙含量季节变化的影响  

Seasonal variations in biomass and salidroside content in roots of Rhodiola sachalinensis as affected by gauze and red film shading.

作　　者：阎秀峰[1] 王洋[1] 郭盛磊[1] 尚辛亥[1] 

机构地区：[1]东北林业大学生命科学学院,哈尔滨150040

出　　处：《应用生态学报》2004年第3期382-386,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目 ( 3 970 0 0 13 )

摘　　要：采用纱布遮荫 (覆以透明膜 )和红色滤光膜处理人工种植生长 3年和 4年的高山红景天 ,观察了根生物量和红景天甙含量的季节变化 .结果表明 ,纱布遮荫处理 (相对光强为全光照的 5 1 8% )下根的生物量显著下降 ;红景天甙含量略有增加 ,红景天甙产量 (红景天甙含量与根生物量乘积 )则有所降低 ,但差异均不显著 .红色滤光膜处理 (相对光强为全光照的 5 1 8% )与纱布遮荫处理相比 ,根生物量减少但不显著 ,红景天甙的含量和产量则显著增加 ,生长季末前者的红景天甙含量为后者的 1 6 3倍 (生长 3年 )和1 5 5倍 (生长 4年 ) ,红景天甙产量为后者的 1 4 4倍 (生长 3年 )和 1 4 5倍 (生长 4年 )Rhodiola sachalinensis A.Bor,a perennial herb,belonging to the family Crassulaceae,is mainly distributed in mountains at the altitudes of 1 700～2 500 m.It is a typical alpine plant and a very important medicinal plant with high activities of anti-fatigue,anti-senescence,and anti-radiation,due to the secondary metabolite salidroside in its root.Our previous findings have proven that red light promotes salidroside synthesis remarkably but decreases biomass insignificantly,resulting in a higher yield of salidroside in roots of Rh.sachalinensis in a greenhouse.In order to investigate the influences of shading and red light on seasonal variations in biomass and salidroside content in Rh.sachalinensis roots,the effects on 3 or 4 years old Rh.sachalinensis plants in a nursery in Daxinganling Mountain (124°02' E,50°30' N) were studied in 2001.Compared to the control (CK) of full sunlight,6 treatments with neutral transparent film and gauze,or red film alone had been conducted for 131 days.In treatment Ⅰ,Rh.sachalinensis was shaded with neutral transparent film and gauze to achieve an irradiance 51.8% of full sunlight.In treatment II,the plants were shaded by red film alone,but the irradiance was as that in treatment I.In treatments Ⅲ,Ⅳ,Ⅴ and Ⅵ,neutral transparent film and gauze were originally used on May 8,then shifted to red film on Jun 3,July 4,August 4 and September 2,respectively and all experiments stopped on September 16,2001.Rh.sachalinensis roots were harvested on 2～4th from June to September and finally on September 16,and root-biomass and salidroside content were measured.Root-biomass in plants decreased significantly under shading with neutral transparent film and gauze compared to the control with full sunlight,but little variations in salidroside content and yield.In comparison with shading by neutral transparent film and gauze,root-biomass reduced lightly and salidroside content and yield in roots were increased remarkably under red-film shading.At the end of the season,salidroside conten

关 键 词：高山红景天 根生物量 红景天甙 含量测定 季节变化 遮荫 红膜处理 

分 类 号：Q946[生物学—植物学]