| 余浩,王幽静,宋睿,潘彦硕,王长青,刘炳杉,李本银,李烜桢.不同品种烟草对Cd的富集及根际有机酸的分泌特征[J].农业环境科学学报,2018,37(9):1827-1832. |
| 不同品种烟草对Cd的富集及根际有机酸的分泌特征 |
| Bioaccumulation of Cd in different varieties of tobacco and their rhizosphere organic acid secretion characteristics |
| 投稿时间：2018-02-01 |
| DOI：10.11654/jaes.2018-0178 |
| 中文关键词: 土壤污染 Cd积累 烟草 有机酸 |
| 英文关键词: soil pollution Cd accumulation tobacco organic acids |
| 基金项目:国家自然科学基金项目（41401350）；河南省科技攻关项目（152102310021）；河南省高等学校重点科研项目（17A610001）；国家重点研发计划项目（2018YFD0800304） |
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| 中文摘要: |
| 为探索用烟草修复Cd污染土壤的可行性，采用盆栽试验，以7种常见的烟草品种（云烟87、中烟100、粤烟96、长脖黄、K326、8326和NC628）为供试植物，研究了烟草对Cd的富集能力及根际有机酸的分泌特征。结果表明：Cd胁迫下，"长脖黄"根、茎、叶生物量均最高；"云烟87"叶Cd含量最高，为64.67 mg·kg-1，"长脖黄"茎Cd含量最高，为27.1 mg·kg-1，"8326"根Cd含量最高，为23.75 mg·kg-1；从Cd贮存部位看，不同烟草品种均为叶 > 茎 > 根；从去除率看，"长脖黄"对Cd的去除率最高，达3.48%。通过高效液相色谱法分析根际土壤有机酸含量发现，Cd胁迫下7种烟草主要分泌草酸。因此，烟草有望被用于土壤重金属污染的实际修复，其中"长脖黄"最具优势。 |
| 英文摘要: |
| In order to determine the feasibility of remediation of Cd-contaminated soil by tobacco, pot experiments were conducted in this study. Seven common tobacco varieties (Yunyan 87, Zhongyan 100, Yueyan 96, Changbohuang, K326, 8326, and NC628) were employed, and the ability of tobacco to bioaccumulate Cd and the secretion characteristics of organic acids in the rhizosphere were analyzed. The results showed that the biomasses of "Changbohuang" root, stem, and leaf were the highest under Cd stress. The Cd concentrations in "Yunyan 87" leaves, "Changbohuang" stems, and "8326" roots were the highest, reaching 64.67 mg·kg-1, 27.1 mg·kg-1, and 23.75 mg·kg-1, respectively. Regarding the Cd concentration in different organs, it was highest in leaves, followed by stems and roots. The highest removal rate of Cd, i.e., 3.48%, was observed in"Changbohuang". The organic acids in rhizosphere soils were analyzed using HPLC, and the results showed that oxalic acid was secreted by all the tobacco varieties. This study indicated that tobacco is potential for using in the remediation of heavy-metal-polluted soil, with "Changbohuang" the most promising variety for such. |
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