践踏胁迫对4种园林地被植物叶绿素荧光特性的影响  

Influence of Trampling Stress on Chlorophyll Fluorescence Characteristics in Four Species of Landscape Ground Covers

作　　者：常乐[1] 夏宜平[1] 楼建华[2] 陈菁珏[1] 

机构地区：[1]浙江大学农业与生物技术学院园艺系,杭州310029 [2]杭州植物园,杭州310013

出　　处：《园艺学报》2010年第10期1673-1678,共6页Acta Horticulturae Sinica

基　　金：国家科技支撑计划项目(2006BAD07B05)

摘　　要：以佛甲草(Sedum lineare)、矮麦冬(Ophiopogon japonicus var.nana)、络石(Trachelospermum jasminoides)、小叶扶芳藤(Euonymus fortunei var.radicans)等4种园林地被植物进行践踏试验,比较分析其植株生长与叶绿素荧光特性。结果显示:除佛甲草外,几种地被植物践踏后的生长势与翌年恢复性均良好;践踏胁迫后4种地被植物的固定荧光(Fo)图像颜色变深,叶绿素含量有所降低,其中尤以佛甲草最为明显;践踏后6周的PSⅡ原初光能转换效率(Fv/Fm)均明显降低。两种藤本地被植物络石和小叶扶芳藤在践踏胁迫后的光化学猝灭系数(qP)和表观光合电子传递速率(ETR)均高于对照,非光化学猝灭系数(NPQ)低于对照;两种草本地被植物矮麦冬和佛甲草与之相反。综合各项指标来看,藤本地被植物的耐践踏性强于草本地被。叶绿素荧光特性可用于评定地被植物的耐践踏性。Sedum lineare,Ophiopogon japonicus var.nana,Trachelospermum jasminoides and Euonymus fortunei var.radicans were used to investigate the plant growth and chlorophyll fluorescence characteristics under trampling stress.The results showed that except for Sedum lineare,all the species behavioured well after trampling and in the next year.Under trampling stress,the color of minimal fluorescence（Fo）image got darker,and indicated a decline of chlorophyll content.The value of Fv/Fm was lower than that of untrampled ones.For Trachelospermum jasminoides and Euonymus fortunei var.radicans,qP and ETR were higher than untrampled ones,and NPQ was lower than them.While Sedum lineare and Ophiopogon japonicus var.nana showed different trend.Combined with the indicators,Trachelospermum jasminoides and Euonymus fortunei var.radicans which belonged to lines exhibited better trampling resistance than tufts like Sedum lineare and Ophiopogon japonicus var.nana.The chlorophyll fluorescence characteristics can be used in the assessing of trampling resistance.

关 键 词：佛甲草 矮麦冬 络石 小叶扶芳藤 践踏胁迫 叶绿素荧光 

分 类 号：S688.4[农业科学—观赏园艺]