遮光对单叶铁线莲生长与生理特性的影响  

Effects of shading treatment on growth and physiological characteristics of Clematis henryi

作　　者：陈子航 陶丽 侴天泽 杨晗曦 刘志高[1,2] 俞慧婷 申亚梅[1,2] CHEN Zihang;TAO Li;CHOU Tianze;YANG Hanxi;LIU Zhigao;YU Huiting;SHEN Yamei(College of Landscape and Architecture,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Zhejiang Provincial Key Laboratory of Germplasm Innovation and Utilization of Garden Plants,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)

机构地区：[1]浙江农林大学风景园林与建筑学院,浙江杭州311300 [2]浙江农林大学浙江省园林植物种质创新与利用重点实验室,浙江杭州311300

出　　处：《浙江农林大学学报》2024年第3期615-623,共9页Journal of Zhejiang A&F University

基　　金：浙江省农业新品种重大专项花卉育种专项(2021C02071-6-4);浙江省农业(林木)新品种选育重大科技专项子课题(2016C02056-13-4);浙江农林大学学生科研训练项目(2023KX048)。

摘　　要：【目的】探讨单叶铁线莲Clematis henryi对不同光照强度的生理响应机制,为单叶铁线莲的引种栽培和园林应用提供依据。【方法】以3年生单叶铁线莲扦插苗为研究材料,设置遮光率为0(ck)、80%(T1)、60%(T2)、50%(T3)和40%(T4)5种光照处理,研究不同遮光强度对单叶铁线莲植株生长和生理的影响。【结果】①遮光处理显著增加植株分蘖数量、节数和节间距(P<0.05),T1处理的分蘖数和节数增幅最大,分别增加63.0%和24.3%,T1、T2、T3处理的节间距分别高于对照27.5%、8.4%和32.1%,T3处理的生物量最高,高于对照36.7%;②遮光处理极显著促进蛋白质合成,同时减少丙二醛(MDA)的产生(P<0.01),T1处理的MDA质量摩尔浓度最低,可溶性蛋白质量分数于30 d达最大值(11.2 mg·g^(−1));③叶绿素a和叶绿素b质量浓度不断增加,60 d时各处理组均高于对照,T1处理的叶绿素总量于30 d时达最大值(2.28 mg·L^(−1)),为对照的3.9倍;④随遮光强度由高到低,过氧化物酶(POD)和过氧化氢酶(CAT)活性呈升—降—升的变化趋势,同时2种酶的活性随时间推移逐步上升,超氧化物歧化酶(SOD)则相反。【结论】单叶铁线莲有较强耐阴性,50%~60%的光照强度可显著促进枝和叶的生长和干物质积累,提高观赏价值。夏季栽培单叶铁线莲应选择适宜的遮光环境,保障植株的健康生长。[Objective]This study,with an investigation of the physiological response mechanism of Clematis henryi to different light intensity,is aimed to provide scientific basis for its introduction,cultivation,and landscaping applications.[Method]With three-year-old C.henryi cutting seedlings used as experimental materials,five light treatments were set up:full sunlight(ck),80%(T1),60%(T2),50%(T3),and 40%(T4)shading before a study was conducted of the effects of different shading levels on the growth and physiology of C.henryi plants.[Result](1)Shading treatment significantly increased the number of tillers,number of segments and segment spacing of plants(P<0.05),with the increase in the number of tillers and segment spacing of plants under T1 treatment being the highest(63.0%and 24.3%,respectively),and the segment spacing of plants under T1, T2 and T3 treatments being higher than that of the control (27.5%, 8.4% and 32.1% respectively). (2) Shading treatment significantly promoted protein synthesis and decreased MDA production (P<0.01), with the mass molar concentration of MDA in T1 treatment being the lowest, and the mass fraction of soluble protein (SP) reaching the maximum at 30 d (11.2 mg·g^(−1)). (3) The mass concentration of chlorophyll a and chlorophyll b increased continuously, with each index of the shading group being higher than that of the control at 60 d, and the total mass concentration of chlorophyll reaching the maximum value (2.28 mg·L^(−1)) at 30 d, which was 3.9 times that of the control. (4) The activities of POD and CAT showed the trend of rise-fall- rise with the shading from high to low, while the activities of the two enzymes increased gradually over time, and the opposite was true for SOD. [Conclusion] C. henryi exhibited strong shade tolerance, with shading levels of 50% − 60% significantly promoting the growth and dry matter accumulation of branches and leaves, enhancing ornamental value. Therefore, suitable shading environments should be selected for summer cultivation to ensure the h

关 键 词：单叶铁线莲 遮光 保护酶活性 叶绿素 生理指标 

分 类 号：S718.43[农业科学—林学]