光质对黄芩生长与生理生化特征的影响  

Effects of light qualities on growth and physiological⁃biochemical traits of Scutellaria baicalensis

作　　者：杨颜萌 张家兴 李亚茹 马靖然 王铎 靳占才 谢路路 邓娇娇 叶吉[1] 于大炮[1] 王庆伟[1] YANG Yanmeng;ZHANG Jiaxing;LI Yaru;MA Jingran;WANG Duo;JIN Zhancai;XIE Lulu;DENG Jiao-jiao;YE Ji;YU Dapao;WANG Qingwei(CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China;University of Chinese Academy of Sci-ences,Beijing 100049,China;Liaoning Provincial Ecology&Environment Monitoring Center,Shenyang 110163,China;Qinghai Provincial Haixi Forestry and Grassland Station,Delingha 817000,Qinghai,China)

机构地区：[1]中国科学院沈阳应用生态研究所中国科学院森林生态与管理重点实验室,沈阳110016 [2]中国科学院大学,北京100049 [3]辽宁省生态环境监测中心,沈阳110163 [4]青海省海西州德令哈市林业和草原站,青海德令哈817000

出　　处：《应用生态学报》2024年第2期424-430,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金优秀青年科学基金项目(32122059);沈阳市中青年科技创新人才支持计划基金项目(RC210495)资助。

摘　　要：冠层光谱组成的差异显著影响着林下植物生长和功能性状的表达。本文采用全光谱、紫外⁃A(UV⁃A)辐射、蓝光、绿光、红光等不同LED定制光源对黄芩幼苗进行培养,研究林下药用植物黄芩生长、形态发育、生物量分配、生理特征以及主要次生代谢产物对不同光质的响应特征,旨在探究适合其产量与品质提升的最佳光环境,为林下药用植物资源开发利用提供科学参考。结果表明:与全光谱相比,UV⁃A显著降低了黄芩株高、地径、叶片厚度和叶面积比,以及各器官生物量;红光显著降低了黄芩地径、生物量、光系统Ⅱ的有效量子产量(ФPSⅡ)及总黄酮浓度;蓝光下黄岑的根长和总生物量显著增加,分别上升了48.0%和10.8%,而叶片数、叶绿素含量显著降低,降幅为20.0%和31.6%,其余主要生理生化性状均与全光谱下响应一致。蓝光在黄芩光合功能维持、生物量积累及次生代谢物合成方面起促进作用,而红光和UV⁃A在黄芩生理生化代谢过程方面具有明显的抑制作用。因此,黄芩种植可适当增加蓝光的配比,以提高其产量与品质。Canopy spectral composition significantly affects growth and functional traits of understory plants.In this study,we explored the optimal light condition suitable for enhancing Scutellaria baicalensis’s yield and quality,aiming to provide scientific reference for the exploitation and utilization of medicinal plant resources in the understory of forests.We measured the responses of growth,morphology,biomass allocation,physiological traits,and secon⁃dary metabolites of S.baicalensis to different light qualities.S.baicalensis was cultured under five LED⁃light treat⁃ments including full spectrum light(control),ultraviolet⁃A(UV⁃A)radiation,blue,green,and red light.Results showed that UV⁃A significantly reduced plant height,base diameter,leaf thickness,leaf area ratio,and biomass of each organ.Red light significantly reduced base diameter,biomass,effective quantum yield of photosystemⅡ(ФPSⅡ),and total flavonoid concentration.Under blue light,root length and total biomass of S.baicalensis signifi⁃cantly increased by 48.0%and 10.8%,respectively,while leaf number and chlorophyll content significantly decreased by 20.0%and 31.6%,respectively.The other physiological and biochemical traits were consistent with their responses in control.Our results suggested that blue light promoted photosynthesis,biomass accumulation,and secondary metabolite synthesis of S.baicalensis,while red light and UV⁃A radiation negatively affected physiological and biochemical metabolic processes.Therefore,the ratio of blue light could be appropriately increased to improve the yield and quality of S.baicalensis.

关 键 词：林下药用植物 冠层光谱 产量 品质 次生代谢产物 功能性状 

分 类 号：S567.239[农业科学—中草药栽培]