不同盐度水淹胁迫对海滨木槿生理特性的影响  

Physiological Properties Changes of Hibiscus hamabo Seedlings under Different Salinity Water Logging

作　　者：周和锋[1] 李会欣[2] 邵学新[2] 房聪玲[1] 叶小齐[2] 吴明[2] 

机构地区：[1]浙江省慈溪市林特技术推广中心,浙江慈溪315300 [2]中国林业科学研究院亚热带林业研究所,国家林业局杭州湾湿地生态系统定位研究站,浙江富阳311400

出　　处：《浙江林业科技》2013年第6期41-45,共5页Journal of Zhejiang Forestry Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项(RISF61256);浙江省省院合作林业科技项目(2010SY02)

摘　　要：以1年生海滨木槿(Hibiscus hamabo)扦插苗为材料,采用"双套盆法",研究了高盐度海水和低盐度地表水及其不同持续时间的水淹胁迫对海滨木槿叶片叶绿素含量、电解质渗出率、丙二醛(MDA)含量、脯氨酸含量、SOD和POD活性的影响。结果表明:水淹胁迫下,海滨木槿叶片中的叶绿素含量降低;脯氨酸含量、MDA含量和SOD活性先升高后降低;电导率、POD活性持续升高,到胁迫的第26天,低盐度地表水胁迫下各处理的POD活性分别高出对照的150%、180%;胁迫解除后20 d,各处理的恢复能力表现为低盐度地表水>高盐度海水,与海水胁迫相比,地表水胁迫下植物叶片的SOD和POD活性较高,持续时间长,海滨木槿的受害程度小,说明海滨木槿对研究区低盐度地表水胁迫具有一定的耐受力。Experiments were implemented on physiological and biochemical properties of 1-year Hibiscus hamabo cuttings under seawater and river water logging treatments.The results indicated that under water logging treatment,chlorophyll content of the tested seedlings decreased,while proline,malondialdehyde content and the activity of superoxide dismutase increased at beginning and decreased later along with water logging duration,and the electric conductivity and the activity of peroxidase increased.Recovery capability of tested seedlings 20 days later was as follows：river water logging ＞ seawater logging.The experiment demonstrated that H.hamabo was more resistant to river water stress than to seawater stress.

关 键 词：海滨木槿 水淹胁迫 生理特性 

分 类 号：S718.43[农业科学—林学]