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| Effects of Arbuscular Mycorrhizal Fungi and Phosphogypsum on Growth and Arsenic Accumulation of Tobacco（Nicotiana tabacum L.） |
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| KeyWord:arbuscular mycorrhizal fungi（AMF）; phosphogypsum（PG）; tobacco; phosphorus; sulfur; arsenic |
| Author Name | Affiliation | | ZHANG Li | Yunnan Agricultural University, Kunming 650201, China | | YUE Xian-rong | Yunnan Agricultural University, Kunming 650201, China | | GU Lin-jing | Yunnan Agricultural University, Kunming 650201, China | | ZHANG Chuan-guang | Yunnan Agricultural University, Kunming 650201, China
Yunnan Academy of Forestry, Kunming 650204, China | | SHI Jing | Yunnan Agricultural University, Kunming 650201, China | | ZHANG Nai-ming | Yunnan Agricultural University, Kunming 650201, China | | XIA Yun-sheng | Yunnan Agricultural University, Kunming 650201, China |
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| Abstract: |
| Phosphogypsum（PG）, an industrial by-product, contains P, S As and other micronutrients. Its agricultural applications may cause soil and plant contamination. The objective of this study was to investigate the role of arbuscular mycorrhizal fungi（AMF） on tobacco（Nicotiana tabacum L.） growth and arsenic（As） accumulation under phosphogypsum（PG） treatments in a pot experiment. Two PG application levels（0 and 40 mg·g-1） and two AMF species, i.e. Glomus mosseae（GM） and G. aggregatum（GA）, were used. Plant biomass and phosphorus（P）, sulfur（S）, and As uptake of tobacco（KRK26） were measured. Regardless of AMF inoculation, applying PG amendment significantly increased shoot biomass and tissue concentrations, total uptake and specific absorption rate of S in tobacco. Amendment of PG also significantly increased tissue concentrations, total uptake and specific absorption rate of P in tobacco, with an exception of roots in non-AMF（NM） treatment. However, PG amendment significantly decreased tissue concentrations and uptake of As in tobacco shoots with NM, and thus significantly increasing the absorption ratios of P to As. Under PG treatment, both GM and GA inoculations significantly increased plant biomass of tobacco, compared with the NM treatment. GM inoculation also significantly increased the tissue concentrations and total uptakes of P, S, and As, as well as the specific absorption rates of P and S, excepting roots in non-PG（PG0） treatment. In addition, GM inoculation significantly increased the ratios of P to As absorption in tobacco with the PG40（40 mg PG·g-1） treatment. Similarly, GA inoculation significantly increased tissue concentrations and total uptake of P and S, but significantly decreased tissue concentrations and total absorption of As with the PG0 treatment. Combination of PG40 and GA inoculation had the most desirable effects on tobacco growth and could reduce the risk of As pollution caused by agricultural application of PG to some extent. |
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