不同土壤含水量对重瓣松果菊生长、生理特性和菊苣酸含量的影响  

Effects of different soil moisture contents on the growth,physiological characteristics,and chicory acid content of double petaled Echinacea purpurea(L.)Moench

作　　者：张丽丽 田丹青 万晓 曹群阳 葛亚英 ZHANG Lili;TIAN Danqing;WAN Xiao;CAO Qunyang;GE Yaying(Zhejiang Institute of Landscape Plants and Flowers,Hangzhou 311251,Zhejiang,China)

机构地区：[1]浙江省园林植物与花卉研究所,浙江杭州311251

出　　处：《浙江大学学报(农业与生命科学版)》2025年第1期164-176,共13页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：浙江省基础公益计划项目(LGN22C150020)。

摘　　要：为探究重瓣松果菊在不同土壤含水量下的生理变化规律及其药用栽培适宜土壤含水量,本研究采用盆栽控水的实验方法,设置了对照[饱和含水量的(70±5)%]、轻度干旱[饱和含水量的(55±5)%]、重度干旱[饱和含水量的(40±5)%]、轻度水涝[饱和含水量的(85±5)%]和水淹(持续浸盆)5种土壤含水量处理,比较了不同水分条件下松果菊的生长、生理及菊苣酸含量变化。结果表明:水分胁迫会抑制松果菊的生长,导致植物株高、冠幅、叶片相对含水量和光合色素积累量显著降低,30 d的水淹胁迫虽然导致植株严重损伤,但未能致死。重度干旱和水淹处理下,松果菊通过提高叶片内抗氧化酶(超氧化物歧化酶、过氧化物酶和过氧化氢酶)活性和渗透调节物质(可溶性糖、可溶性蛋白和脯氨酸)含量来降低水分胁迫损伤。水分胁迫虽然抑制了松果菊的生长,但提升了叶片菊苣酸的积累量,在处理第30天时,重度干旱和水淹处理下叶片菊苣酸的含量分别是对照的1.389倍和1.650倍。相关性分析显示,菊苣酸含量与过氧化物酶活性、脯氨酸和丙二醛含量等多个胁迫反应相关的指标呈显著正相关,说明菊苣酸的积累与抗逆反应相关。综上所述,重瓣松果菊具有较强的耐旱和耐水涝性,药用采收前可通过短期的水分胁迫来提高叶片菊苣酸含量,其中重度干旱处理效果最佳。本研究可为药用和观赏两用的重瓣松果菊规范化栽培,以及通过控水法提高叶片菊苣酸含量提供理论依据。In order to investigate the physiological changes of double petaled Echinacea purpurea(L.)Moench under different soil moisture contents and the suitable soil moisture content for medicinal cultivation,the water-controlled pot experiment method was used,and five soil moisture treatments including a control group[(70±5)%of saturated water content],mild drought[(55±5)%of saturated water content],severe drought[(40±5)%of saturated water content],mild waterlogging[(85±5)%of saturated water content],and waterlogging(continuous soaking of pots)were set up in this study.The growth,physiology,and chicory acid content changes of Echinacea purpurea under different water conditions were compared.The results showed that water stress could inhibit the growth of Echinacea purpurea,leading to significant decreases in plant height,crown width,relative water content of leaves,and accumulation of photosynthetic pigments.Although 30 d of waterlogging stress caused severe plant damage,it did not lead to death.Under severe drought and waterlogging treatment,Echinacea purpurea could increase the activity of antioxidant enzymes(superoxide dismutase,peroxidase,and catalase)and contents of osmoregulatory substances(soluble sugar,soluble protein,and proline)in leaves to reduce water stress damage.Although water stress inhibited the growth of Echinacea purpurea,it increased the accumulation of chicory acid in the leaves.On the 30th day of water stress,the content of chicory acid in leaves under severe drought and waterlogging treatments was 1.389 and 1.650 times of the control,respectively.Correlation analysis showed that the content of chicory acid was significantly positively correlated with physiological indicators related to multiple stress responses,such as peroxidase activity,and proline and malondialdehyde contents,indicating that the accumulation of chicory acid was related to stress resistance.In summary,double petaled Echinacea purpurea has strong drought and waterlogging resistance.In the medicinal cultivation,the content of

关 键 词：松果菊 水分胁迫 菊苣酸 生理特性 

分 类 号：S682.11[农业科学—观赏园艺]