Analysis of Differences in Medicinal Component Contents of Magnolia officinalis at Different Altitudes and Their Causes  

作　　者：Guozhong SU Wuniu WANG Linchang TUBI Jingqiu FENG Yuan LIU 

机构地区：[1]College of Pharmacy and Food,Southwest Minzu University,Chengdu 610041,China [2]Sichuan Provincial Qiang-Yi Medicinal Resources Protection and Utilization Technology and Engineering Laboratory,Southwest Minzu University,Chengdu 610225,China [3]Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People s Republic of China,Southwest Minzu University,Chengdu 610225,China [4]College of Grassland Resources,Southwest Minzu University,Chengdu 610225,China

出　　处：《Medicinal Plant》2025年第2期1-6,13,共7页药用植物(英文)

基　　金：Supported by National Key Research and Development Program of China in 2018(2018YFC1708005);the Southwest Minzu University Research Startup Funds(RQD2023020).

摘　　要：[Objectives]To analyze the differences in medicinal component contents of Magnolia officinalis across different altitude gradients and explore their causes.[Methods]In this experiment,M.officinalis trees aged 15-20 years growing at four altitudes(1301,1444,1573,and 1643 m)were selected as experimental materials.Leaf traits,soil physicochemical properties,and medicinal component contents were investigated,and the relationships among leaf traits,soil physicochemical properties,and medicinal components were analyzed.[Results]With increasing altitude,the specific leaf area(SLA)of M.officinalis significantly increased,while stomatal density,vein density,leaf thickness,and mesophyll tissue thickness decreased.Soil total nitrogen(TN),total phosphorus(TP),total potassium(TK),available nitrogen(AN),and organic matter contents(OM)decreased significantly with altitude,whereas available potassium(AK)showed the opposite trend.The contents of medicinal components magnolol and honokiol in M.officinalis also significantly decreased with altitude.Correlation analysis revealed that,in addition to altitude,soil physicochemical properties(pH,TP,OM)and leaf traits(leaf thickness,palisade tissue thickness,SLA)were significantly correlated with magnolol and honokiol contents.[Conclusions]M.officinalis at lower altitudes exhibited better growth and higher magnolol and honokiol contents,which may be attributed to higher soil nutrient availability in low-altitude regions.This study provides guidance for selecting cultivation sites and optimizing planting patterns for M.officinalis.

关 键 词：Magnolia officinalis ALTITUDE Medicinal components Leaf traits Soil physicochemical properties 

分 类 号：S792.99[农业科学—林木遗传育种]