硫污染对9种园林植物叶片硫含量与叶绿素荧光参数的影响  

Effect of SO_2 on leave’s sulfer content and chlorophyll fluorescence of gardens plants in Shenzhen

作　　者：洪渊 张冬鹏 黄俊华 

机构地区：[1]深圳市环境保护监测站,深圳518001

出　　处：《生态科学》2006年第6期558-560,共3页Ecological Science

基　　金：深圳市科技计划项目资助

摘　　要：对深圳市9种园林植物叶片硫含量,以及硫处理对叶片光合作用参数的影响进行了初步研究。这9种植物分别为红背桂(Excoccaria cochinchinensis)、黄脉爵床(Sanchezia nobilis)、大叶变叶木(Codiaeum variegatum)、基及树(Saruma henryi)、短穗鱼尾葵(Caryota mitis)、小叶榕(Ficus microcarpa var.pusillifolia)、高山榕(Ficus altissima)、海桐(Pittosporum tobira)和黄叶假连翘(Duranta repenscv.\’DwarfYellow\’)。在温度25℃条件下分别在光照和黑暗条件,用NaHSO3和蒸馏水浸泡各植物叶圆片24h,共形成4种处理。采用PAM-2100荧光仪测定叶绿素荧光参数。在自然状况下采集的黄脉爵床叶片含硫量最高,远高于其他植物,具有较高的富集能力,含量最低的是大叶变叶木。用蒸馏水浸泡后,9种植物叶片的硫含量的变化很少。在NaHSO3处理下,有7种植物叶片的硫含量显著提高,增加最多的是自然条件下富集能力最低的大叶变叶木。[0]取自不同大气SO2污染环境的被测试植物显示,除海桐外,小南山的其它8种植物叶片含硫量都大于世博园植物叶片的含硫量。小南山9种植物的Fv/Fm值也都低于世博园,说明在污染较严重的情况下可以通过测定植物叶片的Fv/Fm值来进行现场监测。Culfur content of the leaves and chlorophyll fluorescence of 9 garden plant species from Shenzhen were measured in November 2005 to evaluate effect of atmospheric SO2 and to select bio-indicators for atmospheric SO2 monitoring. These plant species include Excoccaria cochinchinensis, Sanchezia nobilis, Codiaeum variegatum, Saruma henryi, aryota mitis, Ficus microcarpa var.pusillifolia, Ficus altissima, Pittosporum tobir aand Duranta repens cv.\’Dwarf Yellow\’. Under natural condition, the sulfur content in leaves of Sanchezia nobilis was the highest, and that for Codiaeum variegatum was the lowest. Sulfur contents of leaves treated with distilled water from the 9 species showed very slight change. When treated with NaHSO3, the sulfur contents in seven of the 9species increased,especially in the leaves of C.variegatum. The same 9 species were collected from two gardens where the atmospheric SO2 concentration is different: Small Nan Hills with high air SO2 and World Exhibition Park with low air SO2. Except for P.tobira, the other 8 species had higher sulfur contents and lower Fv/Fm in Small Nan Hills than in the World exhibition Park. This result demonstrates that Fv/Fm of the 9 plant species is a suitable parameter to indicate pollution from atmospheric SO2.

关 键 词：叶绿素荧光 叶片硫含量 大气SO2 园林植物 

分 类 号：X503.23[环境科学与工程—环境工程]