2017年2月第50卷第2期
烟草科技
Tobacco Science&Technology
Feb.2017
V ol.50No.2
烟草对镉的吸收积累特性及镉的化学形态分布
贺远1，吕耀印2，贾涛2，吴爽爽1，李庆祥1，张政强1，石屹3，王树声*3
1.郑州轻工业学院食品与生物工程学院，郑州市东风路5号450002
2.天昌国际烟草有限公司技术中心，河南省许昌市魏都区461000
3.中国农业科学院烟草研究所农业部烟草生物学与加工重点实验室，山东省青岛市崂山区科苑经四路11号266101
摘要：为明确烟草对重金属镉（Cd）的吸收积累特性及其化学形态分布特点，采用水培试验研究了烟草对Cd的吸收特性，以及在不同Cd浓度下烟草根茎叶Cd含量（质量分数）及其化学形态分布。结果表明，烟草对Cd的吸收量随着Cd处理时间的推移呈现先降低后升高的趋势，达到240μg·株-1时趋于稳定，之后又有所降低。烟草对Cd的吸收速率则呈现高-低-高的变化趋势，烟草移栽入含Cd培养液中4～5h时，对Cd吸收速率最高。随着Cd处理浓度的增加，烟草干物质的积累量先升高后降低，低浓度Cd处理的烟草干物质量增加。不同Cd浓度处理，烟草不同部位Cd含量排序依次为茎>根>叶，且随着Cd浓度的增加各部位的Cd含量均增加。烟草根系中Cd以去离子水提取态为主，其次为醋酸提取态，叶片中Cd主要以醋酸结合态存在。Cd处理浓度提高时，烟草中Cd由活性弱的化学形态向活性强的形态转化。
关键词：烟草；镉（Cd）；化学形态；吸收速率；干物质量
中图分类号：S572.01文献标志码：A文章编号：1002-0861（2017）02-0009-06
Characteristics of absorption,accumulation and chemical speciation of Cd in tobacco
HE Yuan1,LüYaoyin2,JIA Tao2,WU Shuangshuang1,LI Qingxiang1,ZHANG Zhengqiang1,SHI Yi3,
WANG Shusheng*3
1.College of Food and Biology Engineering,Zhengzhou University of Light Industry,Zhengzhou450002,China
2.Technology Center of Tianchang International Tobacco Co.,Ltd.,Xuchang461000,Henan,China
3.Key Laboratory of Tobacco Biology and Processing,Ministry of Agriculture,Tobacco Research Institute,
Chinese Academy of Agricultural Sciences,Qingdao266101,Shandong,China
Abstract:To clarify the characteristics of absorption,accumulation and chemical speciation of cadmium(Cd)in tobacco,the Cd absorption characteristics in tobacco,the contents and chemical speciation of Cd in tobacco roots,stalks and leaves at different Cd concentrations were studied by hydroponic experiments.The results showed that the amount of Cd absorption in tobacco decreased first then increased with the proceeding of Cd treatment;it became stable at240μg·plant-1then decreased after that.The Cd absorption rate of tobacco presented a tendency of increase-decrease-increase and peaked within4-5hours after tobacco plants were transplanted in Cd solutions.With the increase of Cd concentration,the accumulation of dry matter in tobacco increased first and then decreased,and the dry matter weight was raised at a low Cd concentration.At different Cd concentrations,Cd content was the highest in stalks and the lowest in leaves,and it increased in all parts of tobacco with the increase of Cd concentration.The Cd in roots was mainly deionized water-extractable Cd, followed by acetic acid-extractable Cd,the Cd in leaves mainly existed in the form of binding to acetic acid.
收稿日期：2016-02-26修回日期：2016-10-09
基金项目：郑州轻工业学院博士科研基金项目“锌元素对土壤—烟草系统中镉化学形态及亚细胞分布的影响”（2014BSJJ070）；
国家烟草专卖局特色优质烟叶开发重大科技专项“低危害烟叶开发”（TS-06-20110037）。
作者简介：贺远（1986—），博士，讲师，主要从事植物生理与作物营养研究。E-mail：heyuan818@https://www.doczj.com/doc/6718150420.html,；*通讯作者：王树声，E-mail：wss620128@https://www.doczj.com/doc/6718150420.html,
引文格式：贺远，吕耀印，贾涛，等.烟草对镉的吸收积累特性及镉的化学形态分布［J］.烟草科技，2017，50（2）：9-14.（HE Yuan，LüYaoyin，JIA Tao，et al.Characteristics of absorption,accumulation and chemical speciation of Cd in tobacco
［J］.Tobacco Science&Technology，2017，50（2）：9-14.）DOI：10.16135/j.issn1002-0861.2016.0086
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