不同实生变异和常规檵木光合特性的比较  

Comparison of photosynthetic characteristics of different seed propagated variations and normal Loropetalum chinense

作　　者：王香菲 张大毛 张霞 刘洁 李涛[3] 李卫东 于晓英 李炎林[1,2] WANG Xiangfei;ZHANG Damao;ZHANG Xia;LIU Jie;LI Tao;LI Weidong;YU Xiaoying;LI Yanlin(College of Horticulture,Hunan Agricultural University,Changsha 410128,Hunan,China;Hunan Mid-subtropical Quality Plant Breeding and Utilization Engineering Technology Research Center,Hunan Agricultural University,Changsha 410128,Hunan,China;College of Education,Hunan Agricultural University,Changsha 410128,Hunan,China;Key Laboratory of Germplasm Resources and Comprehensive Utilization of Garden Flowers in Hunan Province,Changsha 410125,Hunan,China)

机构地区：[1]湖南农业大学园艺学院,湖南长沙410128 [2]湖南农业大学湖南省中亚热带优质花木繁育与利用工程技术研究中心,湖南长沙410128 [3]湖南农业大学教育学院,湖南长沙410128 [4]园林花卉种质资源与综合利用湖南省重点实验室,湖南长沙410125

出　　处：《经济林研究》2020年第3期216-224,共9页Non-wood Forest Research

基　　金：湖南省科技计划项目(2018TP2007,2019TP1033);湖南省科技厅重点研发计划项目(2016NK2100);湖南农业大学“双一流”建设项目科学研究培育项目(SYL201802026,SYL2019012);湖南省教育厅项目(18B124);湖南农业大学第三批重大科研项目暨创新团队培育工程项目(201909)。

摘　　要：【目的】通过对不同檵木光合生理特性的研究,探索檵木属不同实生变异光合能力的差异,掌握不同檵木栽培特性,为其今后的高效培育和园林应用提供参考。【方法】以檵木属匍匐变异植株‘卧龙’和垂枝变异植株‘42号’为研究对象,以常规植株‘浏阳红’和‘大叶红’为对照,使用LI-6400便携式光合仪和Pen FP110手持式叶绿素荧光仪,分别测其光合参数和叶绿素荧光参数,绘制光合-光响应曲线和叶绿素荧光诱导动力学曲线。【结果】‘卧龙’的最大净光合速率和初始表观量子效率最大,分别为15.864μmol/(m^2·s)和0.066。‘42号’的光补偿点和暗呼吸速率最高,分别为23.295和0.887μmol/(m^2·s)。‘卧龙’‘浏阳红’‘大叶红’的最大量子产额和最大光合潜能值相对较高,‘42号’相对较低。‘卧龙’的可变荧光和最大荧光与其他3种植株均表现出显著差异,其光能吸收能力和吸光潜能均较好。‘卧龙’比‘42号’的非光化学淬灭参数高,其在强光条件下调节能量耗散能力较强;‘42号’比‘卧龙’的光化学淬灭参数高,其在强光下的光合效率更强。‘卧龙’与‘42号’各参数有着显著差异,‘卧龙’各方面较对照植株有所增强,而‘42号’在光合方面未表现出优势。【结论】檵木光合生理特性与实生变异性状存在一定相关性,与对照植株相比,实生变异植株因变异类型不同,导致光合特性发生了变化。综合来看,‘卧龙’的光合能力更强,能较好地适应环境。【Objective】The differences of photosynthetic physiological characteristics of different Loropetalum chinense were studied aimed to provide a scientific basis of efficient cultivation and garden application,and to master their cultivation properties.【Method】The photosynthetic characteristics and chlorophyll fluorescence characteristics of the creep mutation‘Wolong’and drooping branches variation‘No.42’of L.chinense and control materials‘Liuyanghong’and‘Dahongye’were detected by using LI-6400 portable photosynthesis instrument and Pen FP110 hand-held chlorophyll fluorometer to draft photosynthetic-light response curves and chlorophyll fluorescence induction kinetics curves.【Result】The maximum net photosynthetic rate and initial apparent quantum efficiency of‘Wolong’was the largest,which was 15.864/(m^2·s)and 0.066,respectively.The light compensation point and dark respiration rate of‘No.42’was the highest,which was 23.295 and 0.887μmol/(m^2·s),respectively.And the maximum quantum yield and maximum light and potential values of‘Wolong’,‘Liuyanghong’and‘Dayehong’were relatively higher,and those of‘No.42’was relatively lower.The F v and F m values of‘Wolong’was significantly higher than three others,and showed better light energy absorption and light absorption potential.‘Wolong’had a higher non-quenching parameter than‘No.42’,and its ability to adjust energy dissipation under strong light conditions was stronger.The quenching parameter of‘No.42’was higher than that of‘Wolong’,and its photosynthetic efficiency was higher under strong light.The photosynthetic and chlorophyll fluorescence parameters of‘Wolong’and‘No.42’were significantly different.‘Wolong’showed the advantages on photosynthetic efficiency than control materials compared to‘No.42’.【Conclusion】The photosynthetic physiological characteristics of L.chinense have a certain correlation with different seed propagated traits.Compared with control materials,the seed pr

关 键 词：檵木 光合特性 叶绿素荧光 

分 类 号：S601[农业科学—园艺学]