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| Wheat cultivar difference in bioconcentration and translocation of chromium in soil |
| Received:May 17, 2021 |
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| KeyWord:soil;chromium;wheat;bioconcentration factor;translocation factor |
| Author Name | Affiliation | E-mail | | WANG Yansu | School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China | | | LI Shiwei | School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China | | | YU Xuezhen | School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China | | | LI Helian | School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China | chm_lihl@ujn.edu.cn | | MA Yibing | Macao Environmental Research Institute, Macau University of Science and Technology, Macao 999078, China | |
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| Abstract: |
| Screening of wheat cultivars with low chromium(Cr)accumulation as a basis for the safe agricultural products and elucidating the differences of wheat cultivars in bioconcentrating and translocating soil Cr were carried out through biological experiments. In this study, Shandong fluvo-aquic soil and Jiangxi red soil were spiked with three concentrations of Cr(Ⅵ): 0(CK), 5.6(T1), and 10.0 mg·kg-1 T2). A greenhouse pot experiment was conducted to investigate the bioconcentration and translocation of Cr by growing 12 wheat cultivars in the two different soils. The results showed that at the same concentration of Cr(Ⅵ), the Cr contents recorded in the wheat straw and grain of the same wheat cultivar were significantly different between the two soils(P < 0.05). The Cr contents in the grains of wheat planted in Shandong fluvo-aquic soil were 1.07 to 2.50 times higher than that in Jiangxi red soil. No significant difference was observed in wheat straw Cr content among different wheat cultivars planted in Shandong fluvo-aquic soil under T1 and T2 treatments, whereas there was a significant difference(P < 0.05)in grain Cr content among the cultivars under T2 treatment except for Lunxuan 988 and Bainong AK58. In Jiangxi red soil, significant differences in wheat straw Cr content(P < 0.05)were observed between Yangmai 20 and Lunxuan 988, and there was no significant difference in grain Cr content among the different cultivars. Under T1 and T2 treatments, the bioconcentration factors (the ratio of Cr content in wheat to available Cr concentration in soil)of the 12 wheat cultivars in Shandong fluvo-aquic soil and Jiangxi red soil were 0.19~1.38 and 0.18~2.08, respectively. The translocation factors(TF)of Cr from straw to grain were 0.14~0.61 and 0.04~ 0.49, respectively. There was a positive correlation between the wheat grain Cr content and TF value(P < 0.05). Moreover, soil properties contributed the most to the wheat grain Cr content(P < 0.001). The available Cr concentration in Shandong fluvo-aquic soil was higher, and thus, the bioavailability to wheat plants was increased. The Shannong 17 variety had a low accumulation of Cr, while Bainong AK58 variety had a high accumulation of Cr. |
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