摘要
以长势良好的红豆杉中部枝条上的叶片为试材,采用人工配制pH分别为6.7、5.6、4.0、2.5的酸雨模拟溶液连续喷洒叶片4d,以自来水喷洒对照组,测定供试叶片的叶绿素荧光参数、叶绿素含量、相对电导率和抗氧化物酶的变化值。结果表明:随着时间推移,红豆杉的Fv/Fm值、叶绿素含量呈下降趋势,pH 2.5时,Fv/Fm值、叶绿素含量下降程度最大;红豆杉的相对电导率、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、过氧化物酶(POD)活性均呈上升趋势,pH 2.5时上升幅度最大;表明酸雨对红豆杉生长的各项生理指标有显著影响。
Central leaves of growing good yew branches were used as test materials,leaves were continually spray four days by artificial preparation acid rain under pH 6.7,5.6,4.0,2.5,the control group with spraying water.And then chlorophyll fluorescence parameters of leaves,chlorophyll content,relative electric conductivity and the change values of antioxidant enzyme were determined.The results showed that over time,Fv/Fm value and chlorophyll content continually decreased.Fv/Fm value and chlorophyll content were the biggest to decline when pH was 2.5;the relative conductivity,SOD,CAT and POD activities were on the rise,the largest value obtained when pH was 2.5.The acid rain had remarkable effect on the growth physiological indexes of taxus.
出处
《北方园艺》
CAS
北大核心
2016年第24期80-83,共4页
Northern Horticulture
基金
国家自然科学基金资助项目(11371306)
河南省科技厅计划资助项目(2013-332)
关键词
酸雨
红豆杉
生理生态特征
acid rain
Taxus chinensis
physiological and ecological character
