5个荷兰菊新品种植物叶片光合特性研究  

Photosynthetic Characteristics of Five Cultivars of Symphyotrichum novi-belgii

作　　者：邓甜 季贵梅 刘志高[1] 丁玮 蒋文伟[1] DENG Tian;JI Gui-mei;LIU Zhi-gao;DING Wei;JIANG Wen-wei(College of Landscape Architecture,Zhejiang A&F University,Hangzhou 311300,China;Sol Landscape Engineering Service Co.LTD.,Hangzhou 310000,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]浙江索尔园林工程服务有限公司,浙江杭州310000

出　　处：《浙江林业科技》2023年第3期47-54,共8页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省杭州市余杭区高校科技特派员项目“未来社区园林绿化关键技术研究与应用”(H20210068)。

摘　　要：以‘蓝宝石’‘红宝石’‘莎夏’‘伊娃’和‘妮可’5个荷兰菊Symphyotrichum novi-belgii新品种为研究对象,对其叶片的光合日变化、光强度-光合速率曲线、叶绿素含量等指标进行测定,对比分析其光合特性的异同及其对环境的适应能力。结果表明:5个荷兰菊新品种叶片的净光合速率(P_(n))日变化都呈现出明显的双峰曲线,均出现光合“午休”现象,日均净光合速率由大到小排序为:‘蓝宝石’>‘红宝石’>‘莎夏’>‘伊娃’>‘妮可’,各品种净光合速率达到峰值的时间不同。相关性分析结果表明,5个新品种荷兰菊叶片的气孔导度(G_(s))与P_(n)都呈极显著相关性,是影响5个品种植物光合速率日变化的主要因子。根据光强度-光合速率曲线的非线性拟合参数以及叶绿素含量的结果,分析表明5个品种都属于耐荫性植物。采用TOPSIS综合评价法对其光饱和点(LCP)、暗呼吸速率(Rd)、表观量子效率(AQY)和叶绿素a/b(Ca/Cb)进行综合分析,结果反映5个荷兰菊新品种的耐荫性从大到小排序为:‘伊娃’>‘妮可’>‘红宝石’>‘莎夏’>‘蓝宝石’。In March 2021,1-year seedling of Symphyotrichum novi-belgii‘Lilac Blue’,S.novi-belgii‘Winston S.Churchill’,S.novi-belgii‘Sasha’,S.novi-belgii‘Eva’and S.novi-belgii‘Nicole’were transplanted in pot and moved to greenhouse in Hangzhou,Zhejiang province.In July of the same year,3 individuals of each cultivars were selected to determine the diurnal variation of photosynthesis,light intensity-photosynthetic rate curve and chlorophyll content.The results showed that the diurnal variation of net photosynthetic rate(P_(n))of 5 cultivars displayed a bimodal curve model,and had the phenomenon of“Lunch break”of photosynthesis,the average net photosynthetic rate was ordered by‘Lilac Blue’>‘Winston S.Churchill’>‘Sasha’>‘Eva’>‘Nicole’,and the peak time of net photosynthetic rate was different among plants.Correlation analysis showed that stomatal conductance(G_(s))had extremely significant relation with P_(n),was the main factor affecting the diurnal variation of P_(n).Analysis on the parameters obtained from the nonlinear fitting of the light response curve and the chlorophyll content,it showed that 5 cultivars were shade-enduring.TOPSIS was used to analyze LCP,Rd,AQY and Ca/Cb of the tested cultivars.The order of shade enduring of the five cultivars was as follows:‘Eva’>‘Nicole’>‘Winston S.Churchill’>‘Sasha’>‘Lilac Blue’.

关 键 词：荷兰菊 光合日变化 光响应曲线 叶绿素含量 耐荫性 

分 类 号：S682.1[农业科学—观赏园艺] Q945.11[农业科学—园艺学]