Plant inoculation with Piriformospora indica fungus and additive effects of organic and inorganic Zn fertilize on decreasing the Cd concentration of the plants cultivated in the Cd-polluted soil

IF 1.3 Q4 ENVIRONMENTAL SCIENCES
Mahdieh Abedi, Amir Hossein Baghaie, Hamid Toranjzar
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Abstract

Background: Nutrient deficiency in soils contaminated with heavy metals is one of the main environmental problems. This research was done to investigate the inoculation of plants with Piriformospora indica and organic and inorganic Zn sources on the Cd concentration in the plants cultivated in the Cd-polluted soil. Methods: Treatment consisted of applying organic and inorganic Zn fertilizers in the form of Zn sulfate, Zn oxide, and Zn-EDTA sources at the rates of 0, 20, and 40 kg Zn/ha in the Cd-polluted soil (0, 5, and 10 mg Cd/kg soil) under cultivation of plants inoculation with P. indica. After 90 days, plants were harvested and Zn and Cd concentrations in the plants were measured using atomic absorption spectroscopy (AAS). In addition, the ascorbate peroxidase (APX) and peroxidase (POX) enzyme activity was also measured. Results: Inoculation of plants with P. indica significantly decreased the Cd concentration of plants cultivated in the Cd-polluted soil (10 mg Cd/kg soil) by 17.1%. Furthermore, applying 40 kg Zn/ha from the Zn-EDTA source significantly decreased and increased the Cd and Zn concentrations in the plants by 12.2% and 15.1%, respectively. Although, the application efficiency of this fertilizer was lower in the soils contaminated with heavy metals. Conclusion: Plant inoculation with P. indica and using organic and inorganic Zn fertilizer had an additive effect of increasing and decreasing the Zn and Cd concentrations in plants. However, the role of the plants’ physiological characteristics and the type of soil pollutant should not be ignored.
植物接种稻瘟病菌及有机和无机锌肥对降低Cd污染土壤中栽培植物Cd浓度的加性效应
背景:重金属污染土壤的养分缺乏是主要的环境问题之一。本试验研究了在镉污染土壤中接种梨形孢子菌和有机、无机锌源对植物体内镉浓度的影响。方法:在Cd污染土壤(0、5、10 mg Cd/kg土壤)中接种籼稻种植,分别以硫酸锌、氧化锌和edta锌为源,以0、20、40 kg Zn/ha的速率施用有机和无机Zn肥料。90 d后收获植株,采用原子吸收光谱法测定植株中Zn和Cd的浓度。测定抗坏血酸过氧化物酶(APX)和过氧化物酶(POX)活性。结果:在Cd污染土壤(10 mg Cd/kg土壤)中,接种籼稻可显著降低植株Cd浓度17.1%。施用40 kg Zn/ hm2 Zn- edta能显著降低和提高植株Cd和Zn浓度,分别降低12.2%和15.1%。但在重金属污染土壤中,该肥料的施用效率较低。结论:接种籼稻与施用有机和无机锌肥具有增加和降低植株Zn、Cd浓度的加性效应。但植物生理特性和土壤污染物类型的作用也不容忽视。
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来源期刊
CiteScore
2.40
自引率
37.50%
发文量
17
审稿时长
12 weeks
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