李氏禾对水体中Ni的富集特征及其光合生理响应  

The Enrichment Characteristics of Leersia Hexandra Swartz to Ni in Water and its Photosynthetic Physiological Response

作　　者：覃辉[1,2] 林华 徐虹[1,2] 刘昭君 王义安 甘淑萍 QIN Hui;LIN Hua;XU Hong;LIU Zhaojun;WANG Yian;GAN Shupin(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology:Guilin 541004,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室 [2]岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004

出　　处：《水处理技术》2022年第7期92-97,共6页Technology of Water Treatment

基　　金：广西自然科学基金项目(2020GXNSFAA297256);广西科技基地和人才专项“澜沧江-湄公河水环境技术创新平台”(桂科AD19110156);广西高等学校高水平创新团队及卓越学者计划项目(桂财教函[2018]319);广西八桂学者和特聘专家项目。

摘　　要：为了探讨李氏禾修复Ni污染水体的潜力,通过水培实验,设置不同浓度的Ni(0、5、15、30、45、60、90 mg/L)对李氏禾进行处理,测定不同浓度Ni处理下李氏禾的生长状况及根茎叶中的Ni含量、叶片中总蛋白(TP)含量、抗氧化酶活性(SOD、POD、CAT)、丙二醛(MDA)含量、光合色素含量、光合参数。结果表明:在处理20 d后,当Ni达到30mg/L时李氏禾开始出现发黄枯萎现象;李氏禾根茎叶中的Ni含量最高可达1 839.17、478.13、994.83 mg/kg;随着Ni浓度的不断提升,李氏禾叶片中的总蛋白(TP)含量及抗氧化酶活性先升后降,均在Ni 15 mg/L时达到最大值;丙二醛(MDA)含量持续上升,且在Ni 5~30 mg/L的区间内显著增加;叶绿素含量和光合参数均随着Ni处理浓度的提升而降低。To explore the potential of Leesia hexandra Swartz to repair Ni-polluted water bodies, different concentrations of Ni(0, 5, 15, 30, 45, 60, 90mg/L) were set to treat Leesia hexandra Swartz through hydroponic experiments. The growth status and Ni content in the rhizomes and leaves, total protein(TP) content in leaves, antioxidant enzyme activities(SOD, POD, CAT), malondialdehyde(MDA) content, photosynthetic pigment content,and photosynthetic parameters were measured under different concentrations of Ni in the Leesia hexandra Swartz. The results showed that under the treatment of Ni(30 mg/L) for 20 d, Leesia hexandra Swartz began to turn yellow and wither, with 1 839.17, 478.13, and 994.83 mg/kg of Ni contents in the roots, stems and leaves, respectively;with the continuous increase of Ni concentration, the TP content and antioxidant enzyme activity in the leaves of Leesia hexandra Swartz first increased and then decreased, reaching the maximum value at 15 mg/L of Ni concentration. The content of MDA increased consistently and significantly in the interval of 5~30 mg/L of Ni concentration;both chlorophyll content and photosynthetic parameters decreased with the increase of Ni treatment concentration.

关 键 词：李氏禾 镍 富集特征 生理响应 光合作用 

分 类 号：X592[环境科学与工程—环境工程]