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[1]袁浏欢 万鹏伟 李强 王焱 管鑫 吴小巧 田兴军**.富营养条件下水培旱柳对Zn和Cu的富集特性*[J].应用与环境生物学报,2019,25(06):1-13.[doi:10.19675/j.cnki.1006-687x.2018.12047]
 YUAN Liuhuan,WAN Pengwei,LI Qiang,et al.Accumulation characteristics of Zn and Cu in cutting of Salix matsudana Koidz under hydroponical eutrophication condition*[J].Chinese Journal of Applied & Environmental Biology,2019,25(06):1-13.[doi:10.19675/j.cnki.1006-687x.2018.12047]
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富营养条件下水培旱柳对Zn和Cu的富集特性*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年06期
页码:
1-13
栏目:
研究论文
出版日期:
2019-12-30

文章信息/Info

Title:
Accumulation characteristics of Zn and Cu in cutting of Salix matsudana Koidz under hydroponical eutrophication condition*
作者:
袁浏欢 万鹏伟1 李强1 王焱2 管鑫3 吴小巧3 田兴军1**
1南京大学生命科学学院 南京 210023
2上海市林业总站 上海 200072
3江苏省林业局 南京 210036
Author(s):
YUAN Liuhuan1 WAN Pengwei1 LI Qiang1 WANG Yan2 GUAN Xin3 WU Xiaoqiao3 & TIAN Xingjun1**
1School of Life Sciences, Nanjing University, Nanjing 210023, China
2Shanghai Forestry General Station, Shanghai 200072, China
3Jiangsu Forestry Bureau, Nanjing 210036, China
关键词:
水培旱柳重金属富营养
Keywords:
hydroponics Salix matsudana Koidz heavy metal eutrophication
DOI:
10.19675/j.cnki.1006-687x.2018.12047
摘要:
以旱柳(Salix matsudana Koidz)为研究对象,采用水培方法,研究富营养化条件下重金属污染对旱柳的生长特性、生理指标以及重金属富集的影响。研究结果表明:50 μmol/L Cu处理会显著抑制旱柳生长并引起相应的生理活动,表现为干重、相对生长速率(RGR)、耐性指数(Ti)及光合色素含量降低,丙二醛(MDA)含量和过氧化物酶(POD)活性升高,且50 μmol/L Cu对旱柳的毒害远大于50 μmol/L Zn。随着N、P浓度的提高,旱柳生物量提高,MDA含量和POD活性降低,重金属对旱柳的毒害得到缓解。Cu和Zn主要富集在旱柳根部(插条新生根,下同),但随着N、P浓度的提高,旱柳根部富集Cu和Zn的量显著减少。Cu会增加旱柳根部对Zn的富集,显著降低Zn的转运系数,抑制Zn向新生枝条转运。三种N、P组合(N0 + P0、N1.5 + P0.18和N15 + P1.8,下同)下,与Zn50处理相比,Zn50 + Cu50处理下Zn转运系数分别显著降低了62.8%、57.0%和77.9%(P < 0.05);Zn会减少旱柳根部对Cu的富集,显著提高Cu的转运系数,促使Cu向新生枝条部转运。三种N、P组合下,与添加Cu50的处理相比,Zn50 + Cu50处理下Cu的转运系数分别显著提高了26.0%、62.9%和42.9%(P < 0.05)。N、P浓度的提高会促使Zn向新生枝条部转运,与N0 + P0 + Zn50相比,N1.5 + P0.18 + Zn50和N15 + P1.8 + Zn50处理下Zn的转运系数分别显著提高了45.6%和247.3%(P < 0.05),而对Cu的转运无显著影响。综上,旱柳插条对Cu和Zn具有很强的富集能力,N、P浓度的提高可在一定程度上缓解重金属对旱柳的毒害,减少新生根对Cu和Zn的富集并促使Zn向新生枝条转运。
Abstract:
The effects of heavy metals pollution on the growth characteristics, physiological indexes and heavy metals accumulation were explored under eutrophication conditions with hydroponically growing S. matsudana cuttings. The results showed that under 50 μmol/L Cu treatment, the cutting growth was significantly depressed and its physiological response was induced, with decreasing dry weight, RGR, Ti and content of photosynthetic pigment, as well as increasing MDA content and POD activity. The damage of 50 μmol/L Cu to S. matsudana was more serious than 50 μmol/L Zn. With the increase of N and P concentration, biomass increased while MDA content and POD activity decreased. Eutrophication could alleviate the damage of heavy metals to S. matsudana. Cu and Zn were mainly accumulated in the root of S. matsudana cuttings. With the increase of N and P concentration, Cu and Zn accumulated in the root of S. matsudana cuttings significantly decreased. Accumulation of Zn in the root of S. matsudana cuttings increased when translocation factors (TF) and the transport of Zn to the shoot part depressed by Cu. Under the combinations of N and P (N0 + P0, N1.5 + P0.18 and N15 + P1.8, the same below), TF of Zn under Zn50 + Cu50 treatments significantly reduced by 62.8%, 57.0% and 77.9% (P < 0.05) compared with Zn50, respectively. However, the accumulation of Cu in the root of S. matsudana cuttings reduced while TF and the transport of Cu to the shoot promoted by Zn. Under three combinations of N and P, TF of Cu under Zn50 + Cu50 treatments significantly increased by 26.0%, 62.9% and 42.9% (P < 0.05) compared with Cu50, respectively. The transport of Zn to the shoot part significantly increased with the increase of N and P concentration, but the transport of Cu had no significant change. Compared with the N0 + P0 + Zn50 treatment, TF of Zn promoted by 45.6% and 247.3% (P < 0.05) under N1.5 + P0.18 + Zn50 and N15 + P1.8 + Zn50 treatments. In summary, S. matsudana has strong ability to accumulate Cu and Zn. With the increase of N and P concentration, toxicity of heavy metals to S. matsudana could be alleviated, accumulation of Cu and Zn in root reduced when the transport of Zn to shoot part promoted.

备注/Memo

备注/Memo:
收稿日期 Received: 2018-12-21 接受日期 Accepted: 2019-04-11
*江苏省林业三新工程项目(LYSX[2016]46);国家自然科学基金重点项目(31530007);国家重大研究项目(2016YFD0600204)资助
**通讯作者 Corresponding author(E-mail: tianxj@nju.edu.cn)
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更新日期/Last Update: 2019-04-12