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Accumulation characteristics of Zn and Cu in cutting of Salix matsudana Koidz under hydroponical eutrophication condition*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-13
Research Field:
Articles
Publishing date:

Info

Title:
Accumulation characteristics of Zn and Cu in cutting of Salix matsudana Koidz under hydroponical eutrophication condition*
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
Keywords:
hydroponics Salix matsudana Koidz heavy metal eutrophication
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.12047
DocumentCode:

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.

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Last Update: 2019-04-12