光温对火焰南天竹叶色的影响

Analysis of Effects of Light Intensity and Temperature on Leaf Color of Nandina domestica‘Firepower'

[目的]研究不同光照强度和温度对火焰南天竹(Nandina domestica‘Firepower’)叶色的影响,为其在武汉市园林绿化中应用提供科学依据。[方法]选择武汉市园林科学研究所内的晒花场(全光照射)和树荫下及郊区金银湖公园3个温度和光照强度不同的地点进行试验。采用了简便快速的紫外-分光光度计方法提取和测定火焰南天竹叶片中花青素含量。[结果]同一季节不同温度条件下以及不同季节中火焰南天竹叶色和花青素含量对比结果表明,低温对火焰南天竹花青素的形成有促进作用;同一试验地点火焰南天竹不同部位叶片以及不同生长条件下叶色及花青素含量对比结果表明,光照强度对叶色有较强的影响。[结论]低温和较强的光照都对火焰南天竹叶色有明显的影响。因此,在园林绿化应用中应注重栽植地点的选择,使火焰南天竹展现出更好的观赏性。

[Objective] The aim was to study the effects of different light intensity and temperature on leaf color of Nandina domestica ‘ Firepower＇,and provide a scientific basis for its application in landscaping in Wuhan City.[Method] Three chose test places were flower drying place and shade in Wuhan Landscape Architecture Research Institute,and Jinyinhu Park in suburban,which had different temperature and light intensity.The anthocyanin content in leaves of Nandina domestica ‘ Firepower＇ were extracted and determined by the UV-simple and rapid spectrophotometric method.[Result] The comparing results of leaf color and anthocyanin content of Nandina domestica ‘Firepower＇ in the same season under different temperature conditions and in different seasons showed that low-temperature played a positive role in promoting the the formation of anthocyanins of Nandina domestica ‘ Firepower＇ ; The comparing results of leaf color and anthocyanin content in different parts of Nandina domestica ‘ Firepower＇ in the same locations or under different growing conditions showed that light intensity on leaf color had a strong influence.[Conclusion] The low temperature and strong light have significant effects on leaves color of Nandina domestica ‘Firepower＇.So the selection of its planting test should be focused on in its landscaping application,to make it show better ornamental value.