黄化对牡丹枝条解剖结构及不定根发生的影响  

The Effect of Etiolation on Shoots Anatomical Structure and Adventitious Root Formation of Tree Peony

作　　者：解梦雨 徐珂 王心怡 汪琦 孙悦 袁涛[1] XIE Mengyu;XU Ke;WANG Xinyi;WANG Qi;SUN Yue;YUAN Tao(School of Landscape Architecture,Beijing Forestry University,Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding,National Engineering Research Center for Floriculture,Beijing Laboratory of Urban and Rural Ecological Environment,Engineering Research Center of Landscape Environment of Ministry of Education,Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education,Beijing 100083,China)

机构地区：[1]北京林业大学园林学院,花卉种质创新与分子育种北京市重点试验室,国家花卉工程技术研究中心,城乡生态环境北京试验室,园林环境教育工程研究中心,林木花卉遗传育种教育部重点试验室,北京100083

出　　处：《四川农业大学学报》2022年第6期901-906,共6页Journal of Sichuan Agricultural University

基　　金：国家林草局行业标准项目“牡丹综合体”(2018-LY-054);北京市教委“双一流建设”专项北京林业大学建设世界一流学科和特色发展引导专项资金资助“园林植物高效繁殖与栽培技术研究”(2019XKJS0324)。

摘　　要：【目的】为提高牡丹压条繁殖效率。【方法】以牡丹品种‘洛阳红’和‘黄金翠’作为试验材料,对当年生枝条进行黄化处理后,进行环剥和IBA(indole-3-butyric acid,吲哚丁酸)处理,探究黄化后牡丹枝条解剖结构的变化、不定根生根率和根系质量。【结果】‘洛阳红’和‘黄金翠’枝条黄化处理后,黄化部位的皮层薄壁细胞增多、木栓层发育延迟、木栓层外组织松散,且最先出现不定根。2个品种枝条黄化处理后的生根率和生根质量均优于对照枝条,一级根生根率分别为88.9%、97.8%,其中‘黄金翠’黄化枝条的一级根平均数量、二级根平均数量、每一级根上二级根平均数量、一级根平均根长以及根直径分别为8.08条、59.6条、6.8条、12.42 cm和1.97 mm,表现最佳。【结论】黄化处理可降低牡丹枝条的木质化程度,缩短压条繁殖时的不定根发生时间,提高不定根生根率和根系质量。【Objective】In order to improve the reproductive efficiency of tree peony layering.【Method】Tree peony cultivars ’Luoyang Hong’ and ’Huangjin Cui’ were used as experimental materials,after etiolation treatment and combination with stem gridling and IBA(indole-3-butyric acid)treatment,the effects of etiolation treatment on shoot anatomical structure,adventitious root rooting rate and root quality of tree peony were studied. 【Result】In the etiolated sites of ’Luoyang Hong’ and ’Huangjin Cui’,there were more parenchyma cells,delayed development of phellem cells,loose tissue outside phellem,and adventitious roots appeared first compared with the control. The rooting rate and root quality of ’Luoyang Hong’and ’Huangjin Cui’ with etiolation treatment were better than those of the control,the rooting rate of primary root was 88.9% and 97.8%,respectively. The average primary root number,the average secondary root number,the average secondary root number on each primary root,average primary root length and diameter of ’Huangjin Cui’ were 8.08,59.6,6.8,12.42 cm and 1.97 mm,respectively,which was the best performance in all treatments.【Conclusion】The etiolation treatment reduced the lignification degree of tree peony shoots,shorten the time of adventitious root formation during layering propagation,and improved the rooting rate and root quality of adventitious roots.

关 键 词：牡丹 黄化 解剖结构 不定根 生根率 根系质量 

分 类 号：S685.11[农业科学—观赏园艺]