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[1]Lian Beibei,Zhao Shanshan,Wang Baiqun.Effect of Melatonin and Bacillus thuringiensis on Growth and Uranium Uptake of Brassica chinensis L Under Uranium Stress[J].Research of Soil and Water Conservation,2024,31(06):230-236.[doi:10.13869/j.cnki.rswc.2024.06.041]

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Effect of Melatonin and Bacillus thuringiensis on Growth and Uranium Uptake of Brassica chinensis L Under Uranium Stress

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 06 Page number: 230-236 Column: Public date: 2024-12-10

Title:: Effect of Melatonin and Bacillus thuringiensis on Growth and Uranium Uptake of Brassica chinensis L Under Uranium Stress

Author(s):: Lian Beibei^1,2, Zhao Shanshan^1,2, Wang Baiqun^1,2,3; (1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China)

Keywords:: melatonin; resistant bacteria; uranium; oxidative damage; Brassica chinensis

CLC:: X53; S634.3

DOI:: 10.13869/j.cnki.rswc.2024.06.041

Abstract:: [Objective]This study aims at revealing the mechanism of melatonin and Bacillus thuringiensis on alleviating uranium stress in Brassica chinensis L, and providing a theoretical basis for the combined application of melatonin-resistant bacteria-plant to ameliorate uranium-contaminated soil. [Methods]Through indoor pot experiment of adding uranium(10 mg/kg), the effects of melatonin(100 μmol/L), the uranium resistant bacteria B. thuringiensis on the growth and physiological characteristics of B. chinensis.and the uranium contents and transport in soil and B. chinensis system were studied. [Results](1)Melatonin and B. thuringiensis significantly promoted the growth of B. chinensis, increased the plant height(1.8%～11.8%), biomass(0.8%～34.4%), chlorophyll content(12.1%～50.2%)and nutrient content(7.1%～39.5%).(2)Melatonin and B. thuringiensis attenuated the oxidative damage caused by uranium stress to B. chinensis, enhanced the defense of the oxidative damage system, and promoted the growth of B. chinensis.(3)Melatonin and B. thuringiensis significantly reduced the uranium enrichment coefficient(24.4%)and transport coefficient(33.3%), but increased the enrichment coefficient of roots(9.26%), reduced the risk of eating B. chinensis.(4)Melatonin and B. thuringiensis had a synergistic effect on reducing the uranium content and promoting the growth of B. chinensis, and the combined application effect was better. [Conclusion]Melatonin and resistant bacteria can significantly enhance the soil enzyme activity and antioxidant defense of B. chinensis to boost the absorption of nutrients and weaken oxidative damage, to maintain cell homeostasis, to weaken the absorption and transport of B. chinensis, and to promote plant growth.

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Last Update: 2024-12-10