纳米银与镉的复合毒性对拟南芥根系形态及叶片生理指标的影响

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Abstract To investigate the combined toxictiy of AgNPs and Cd²⁺ on Arabidopsis thaliana seedlings, the root length, the number of root hairs, the content of photosynthetic pigment and protein, superoxide dismutade (SOD) and peroxidase (POD) activity were measured after one week exposure to different concentrations of PVP coated-AgNPs and Cd²⁺. Results showed that high concentration (5mg/L) of Cd²⁺ could significantly inhibit root elongation and increase the protein content and SOD, POD activity. After adding AgNPs in high concentration (5mg/L) of Cd²⁺ treatment, the inhibition effect of Cd²⁺ on Arabidopsis thaliana root length was significantly increased while the inhibition effect of AgNPs on Arabidopsis thaliana root hairs was decreased. After adding AgNPs in low concentration (0.1and 1mg/L) of Cd²⁺ treatment, the inhibition effect of Cd²⁺ on Arabidopsis thaliana photosynthetic pigment content were significantly increased. In Cd²⁺ treatment, SOD, POD activity reached the highest when the seedlings were exposured to 1mg/L AgNPs. Above results showed that Cd²⁺ and AgNPs had interaction effects on root morphology and leaves physiological indexes of Arabidopsis thaliana.

Key words： silver nanoparticle cadmium combined toxicity

Received: 28 September 2017

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	Articles by authors
	ZHANG Chuan-ling
	JIANG Hong-sheng
	LI Chang-jiang
	TANG Qi-hui
	WANG You
	YIN Li-yan

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ZHANG Chuan-ling,JIANG Hong-sheng,LI Chang-jiang等. Effects of AgNPs and cadmium on root morphology and leaves physiological indexes of Arabidopsis thalian[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1951-1960.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I5/1951

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