2个红麻品种在改良铅锌矿渣下的耐性研究  

Study on the Tolerance of Two Kenaf Varieties under Improved Lead-zinc Slag

作　　者：龚紫薇 陈永华 陈基权[2] 张倩妮 欧丹玲 柳俊 GONG Ziwei;CHEN Yonghua;CHEN Jiquan;ZHANG Qianni;OU Danling;LIU Jun(Department of Environmental Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Institute of Bast Fiber Crops,Chinese Academy of Agricuhural Sciences,Changsha 410205,China)

机构地区：[1]中南林业科技大学环境科学与工程学院,长沙410004 [2]中国农业科学院麻类研究所,长沙410205

出　　处：《中国麻业科学》2018年第4期175-182,共8页Plant Fiber Sciences in China

基　　金：环保公益性行业专项(201509037);湖南省环保科技项目(湘财建指[2016-59]);湖南省环境科学与工程重点学科建设项目

摘　　要：为了研究红麻在泥炭土改良的铅锌矿渣下的耐性,试验以红麻品种闽红362和T14为材料,在不同泥炭土处理(对照组:0、改良一:15%、改良二:30%)改良铅锌矿渣下进行盆栽试验,分析Pb、Zn的富集与转运能力,以及各部位的亚细胞分布和形态。结果表明:Pb、Zn在不同红麻品种及不同部位的分布存在差异,其主要分布于根部,两红麻品种对Zn的富集与转运能力高于对Pb的富集与转运能力,且随着改良剂浓度的增加,Zn的转运系数呈增大的趋势;Pb主要存在于红麻的细胞壁组分中,改良剂的加入降低了Pb在细胞器的占比,Zn则主要分布于植物的细胞壁和细胞液中,改良剂的加入使闽红362茎部Zn在细胞液的占比上升,而在T14中则呈现下降趋势;Pb和Zn在红麻体内主要以氯化钠提取态和醋酸提取态存在,改良剂的加入,使在植物体内活性较强的Pb化学形态占比下降,而根部Zn活性较强的化学形态占比上升。因此,液泡区隔化、细胞壁固持和重金属以低活性的化学形态为主可能是两红麻品种应对重金属胁迫的重要耐性机制。In order to study the tolerance of two kenaf varieties to lead-zinc slag,the pot experiment was conducted under different peat concentrations of improved lead-zinc slags（control∶0,Improved group 1∶15%,Improved group 2∶30%）,using kenaf varieties Minhong 362 and T14 as materials.The enrichment and transport capacity of two kenaf varieties for Pb and Zn,as well as the subcellular distribution and morphology of various parts were analyzed.Results showed that：The distributions of Pb and Zn in different kenaf varieties and different parts are different,they are mainly distributed in the roots.The transport ability of Zn is higher than that of Pb,for both of two varieties,and the transport coefficient of Zn increased with the increase of the concentration of the modifier.Pb mainly existed in the cell wall components of two kenaf varieties.The addition of improver reduced the proportion of Pb in organelles.Zn was mainly distributed in the cell wall and cell sap of plants,and the addition of improver made the proportion of Zn in the stem of the plant of Minhong 362 increase,but T14 decrease.Pb and Zn mainly existed in two kenaf varieties with Na Cl and acetic acid-extractable forms.With the addition of the improver,the proportion of the active Pb chemical forms in plants decreased,while the proportion of the active Zn chemical forms in roots increased.Therefore,cell wall binding,vacuolar compartmentalization and distribution mainly in lower active chemical forms were supposed to be the main mechanisms for tolerance to heavy metals in the study plants.

关 键 词：红麻 铅锌矿渣 亚细胞分布 化学形态 

分 类 号：S563.5[农业科学—作物学]