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| Effects of halogenated flame retardants and cadmium on the germination and seedling growth of rice |
| Received:January 07, 2020 |
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| KeyWord:dechlorane plus;tetrabromobisphenol A;cadmium;rice;toxicity |
| Author Name | Affiliation | E-mail | | JIANG Xiu-lan | College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, Tai'an 271018 | | | XIE Hui | College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, Tai'an 271018
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, China | huixie@sdau.edu.cn | | CHANG Xiao-yun | College of Resources and Environment, Shandong Agricultural University, Key Laboratory of Agricultural Environment, Tai'an 271018 | |
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| Abstract: |
| The study investigated the effects of halogenated flame retardants[tetrabromobisphenol A(TBBPA)and dechlorane plus(DP)] and cadmium(Cd)on the germination and seedling growth of rice. A seed germination test was conducted using the soil application method with the seeds of No.3 Yuanhan rice. DP, TBBPA, and Cd inhibited the germination and seedling growth of rice, and there was a significant dose-effect relationship. The EC50(concentration for 50% of maximal effect)of DP, TBBPA, and Cd for root elongation was 250.40, 124.75 mg·kg-1, and 133.41 mg·kg-1, respectively, and that for shoot elongation was 645 265.53, 244.52 mg·kg-1, and 81.80 mg·kg-1, respectively. Halogenated flame retardants and Cd enhanced the root activity of rice. Compared with that in the control, the proline content in seedlings treated with TBBPA, DP, Cd, and combination of pollutants was increased by 51.03%, 4.91%, 42.52% and 86.35% compared with the control, respectively. The soluble protein content in rice seedlings treated with TBBPA and DP was increased by 36.55% and 5.86% compared with the control, respectively. Furthermore, the formation of soluble proteins in rice seedlings treated with Cd and combination of pollutants was inhibited by 28.86% and 15.09%, respectively. The soluble sugar content in rice seedlings was reduced(8.41%)by Cd, but increased by the flame retardants and combination of pollutants compared with the control. The seedlings of No. 3 Yuanhan rice accumulated Cd to a certain level, whereas the residual level of the two flame retardants was very low in the seedlings. The results indicated that DP, TBBPA, and Cd could inhibit the germination and seedling growth of No. 3 Yuanhan rice, and that the seedlings improve tolerance to pollutant stress by regulating the content of proline, soluble sugars, and soluble proteins in cells. |
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