香根草对扑草净胁迫的响应和去除效果  

Stress response and removal efficiency of Vetiveria zizanioides for prometryn

作　　者：石傲傲 郑毅[1,2] 张坤 角慈梅 李鑫圆 孙仕仙 SHI Aoao;ZHENG Yi;ZHANG Kun;JIAO Cimei;LI Xinyuan;SUN Shixian(National Plateau Wetland Research Center/College of Wetland,Southwest Forestry University,Kunming,Yunnan 650224,China;Office of President,Yunnan Open University,Kunming,Yunnan 650223,China;College of Plant Protection,Yunnan Agricultural University,Kunming,Yunnan 650221,China;School of Ecology and Environment,Southwest Forestry University,Kunming,Yunnan 650224,China)

机构地区：[1]西南林业大学国家高原湿地研究中心/湿地学院,云南昆明650224 [2]云南开放大学校长办公室,云南昆明650223 [3]云南农业大学植物保护学院,云南昆明650221 [4]西南林业大学生态与环境学院,云南昆明650224

出　　处：《福建农林大学学报（自然科学版）》2021年第2期170-177,共8页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：国家自然科学基金项目(41867027,41563014,31460551);云南省“万人计划”青年拔尖人才专项(80201442);云南省教育厅科研项目(2018Y117);云南省哲学社会科学教育科学规划项目(AE18038)。

摘　　要：以香根草为供试材料,采用温室水培的方法,研究了香根草对1和10 mg·L^(-1)扑草净胁迫的光合生理响应和去除效果.结果表明:1和10 mg·L^(-1)扑草净处理后,香根草总鲜重和鲜重增长率较CK(未添加扑草净)显著下降;香根草叶片叶绿素含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、PSⅡ最大光化学效率(Fv/Fm)、潜在光化学效率(Fv/Fo)和实际光化学效率(ФPSⅡ)、电子传递速率(ETR)、光化学猝灭系数(qP)均随扑草净处理天数的延长呈先下降后回升趋势,胁迫效应随扑草净浓度增大而增强;胞间CO_2浓度(Ci)随扑草净浓度的增大而增加,随处理天数的延长先升高后降低;但扑草净未对香根草非光化学猝灭系数(NPQ)产生显著影响.1 mg·L^(-1)扑草净处理35 d后,香根草光合参数和叶绿素荧光参数均能恢复到正常水平;10 mg·L^(-1)扑草净处理则呈缓慢恢复趋势.种植香根草的营养液中1和10 mg·L^(-1)扑草净的去除率较未种植香根草处理分别提高了44.68%和53.76%.To study the efficacy of Vetiveria zizanioides as a phytoremediation material,the physiological and photosynthetic respon-ses of V.zizanioides and its removal efficiency for different levels of prometryn(1,10 mg·L^(-1))were studied via hydroponics meth-od.The results showed that in response to 1 and 10 mg·L^(-1) prometryn total fresh weight and fresh weight growth rate of V.zi-zanioides were decreased significantly compared with the control.Chlorophyll content,net photosynthetic rate(Pn),stomatal con-ductance(Gs),transpiration rate(Tr),PSⅡmaximal photochemical efficiency(Fv/Fm),potential photochemical efficiency(Fv/Fo)and actual photochemical efficiency(ФPSⅡ),electron transport rate(ETR)and photochemical quenching coefficient(qP)firstly declined and then increased as the trial proceeded;and stress was intensified with the increase of prometryn concentra-tion.Intercellular CO_(2) concentration(Ci)rose with the increase of prometryn concentration,while it firstly increased and then de-creased as the treatment went on.Prometryn had no significant effect on the non-photochemical quenching coefficient(NPQ)of V.zi-zanioides.After being treated with 1 mg·L^(-1) prometryn for 35 d,the photosynthetic and chlorophyll fluorescence parameters of V.zi-zanioides returned to the normal level;while those treated with 10 mg·L^(-1) prometryn showed a slow recovery trend.Moreover,re-moval rates of 1 and 10 mg·L^(-1) prometryn in nutrient solutions planted with V.zizanioides were enhanced by 44.68%and 53.76%,respectively.

关 键 词：扑草净 香根草 光合荧光 污染胁迫 去除效果 植物修复 

分 类 号：X173[环境科学与工程—环境科学]