盐胁迫对3种灌木植物生长及生理特性的影响  

Effects of salt stress on the growth status and physiological characteristics of three shrubby plants

作　　者：王晓玲 杨洁[3] 陈维峰 刘芳[4] 袁宗胜 WANG Xiaoling;YANG Jie;CHEN Weifeng;LIU Fang;YUAN Zongsheng(College of Geography and Oceanography,Minjiang University/Fuzhou Institute of Oceanography,Fuzhou,Fujian 350108,China;College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;College of Environment and Safety Engineering,Fuzhou University,Fuzhou,Fujian 350108,China;College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China)

机构地区：[1]闽江学院地理与海洋学院/福州海洋研究院,福建福州350108 [2]福建农林大学资源与环境学院,福建福州350002 [3]福州大学环境与安全工程学院,福建福州350108 [4]福建农林大学生命科学学院,福建福州350002

出　　处：《亚热带农业研究》2024年第2期135-144,共10页Subtropical Agriculture Research

基　　金：福州海洋研究院科技项目“滨海耐盐草本植物高效种植关键技术研究及示范应用”(2022F06);福建省林业科技项目“闽江河口湿地互花米草监控及综合利用技术研究”(2023FKJ12)。

摘　　要：[目的]探究3种灌木植物在不同盐浓度胁迫下的生长及生理特性,以期筛选出适宜滨海盐土生长的植物,为滨海沙地生态修复提供参考。[方法]分析根系盐胁迫和叶片盐胁迫下栀子花、虎刺梅、五色梅的生长状态和叶片生理指标,并运用主成分分析法综合评价3种供试植物的耐盐性。其中,根系盐胁迫分别设置0(CK)和0.1%、0.2%、0.3%(海盐与栽培基质质量比)4个盐浓度梯度;叶片盐胁迫分别设置0(CK)和0.2%、0.3%(海盐与蒸馏水质量比)3个盐浓度梯度。[结果]盐胁迫处理后3种供试植物的生长均受到抑制。根系盐胁迫下,0.2%盐浓度处理后第14天,栀子花叶片相对含水量高于CK;0.1%、0.2%盐浓度处理后第28天,栀子花和虎刺梅叶片相对含水量均高于CK。叶片盐胁迫下,0.2%盐浓度处理后第14、第28天,栀子花叶片相对含水量高于CK;0.3%盐浓度处理后第28天,栀子花叶片相对含水量高于CK。根系0.1%、0.2%、0.3%盐浓度处理后,栀子花MDA含量较CK增幅较小,其POD和CAT活性显著高于CK;叶片0.2%、0.3%盐浓度处理后,虎刺梅MDA含量较CK增幅较小,其POD活性显著高于CK;叶片0.3%盐浓度处理后,虎刺梅CAT活性高于CK。主成分分析结果表明,根系盐胁迫下,3种供试植物耐盐性强弱依次为:栀子花>五色梅>虎刺梅;叶片盐胁迫下,耐盐性强弱依次为:虎刺梅>栀子花>五色梅。[结论]根系盐胁迫下,栀子花的耐盐性最强;叶片盐胁迫下,虎刺梅的耐盐性最强。该结果可为在盐碱地上种植灌木类植物提供依据。[Purpose]To identify plants suitable for cultivation on coastal saline soil and provide references for the ecological restoration of coastal sandy land,the growth status of three shrub plants under different salt concentration stresses was explored.[Method]The growth state and leaf physiological indexes of Gardenia jasminoides,Lantana camara,and Euphorbia milii were determined under root salt stress(the mass ratio of sea salt to cultivated substrate was 0.1%,0.2%,and 0.3%,respectively,using CK without any treatment as the control)and leaf salt stress(the mass ratio of sea salt to distilled water was 0.2%and 0.3%,using CK without any treatment as the control).The salt tolerance of the three experimental plants was evaluated by principal component analysis.[Result]The growth of the three tested plants was inhibited after salt stress treatment.Under root salt stress,the relative water content of G.jasminoides leaves was higher than CK on day 14 after treatment with 0.2%salt.On day 28 after treatment with 0.1%and 0.2%salt,the relative water content of G.jasminoides and E.milii leaves surpassed that of CK.Under leaf salt stress,the relative water content of G.jasminoides leaves remained higher than CK on day 14 and 28 after treatment with 0.2%salt.On day 28 after treatment with 0.3%salt,the relative water content of the G.jasminoides leaves exceeded that of CK.Following the treatment of the root systems of the plants with 0.1%,0.2%,and 0.3%salt,the MDA content in G.jasminoides increased minimally compared to CK,with its POD and CAT activities significantly higher than CK.Following the treatment of the leaves with 0.2%and 0.3%salt,the MDA content in E.milii increased minimally compared to CK,with a significantly higher POD activity than that of CK.Following the treatment of the leaves with 0.3%salt,the CAT activity in E.milii exceeded that of CK.Principal component analysis revealed that the salt tolerance of the three experimental plants under root salt stress was ranked as follows:G.jasminoides>L.camara>E.milii.Under

关 键 词：盐胁迫 灌木植物 酶活性 主成分分析 

分 类 号：Q945[生物学—植物学]