Wu Guo, Guo Xinpeng, Yan Shen, Liao Junquan, Wu Wenjuan, Chen Xi, Lai Fengxiang, Wen Yuhan, Yuan Shan, Zhao Jiayuan
Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu 610068, China; College of Life Science, Sichuan Normal University, Chengdu 610101, China.
College of Life Science, Sichuan Normal University, Chengdu 610101, China.
Food Chem. 2025 Nov 15;492(Pt 2):145521. doi: 10.1016/j.foodchem.2025.145521. Epub 2025 Jul 11.
Beta-Cypermethrin (β-CY) is a widely used insecticide that negatively affects plant growth and contaminates crops. In this study, we investigated the ability of Bacillus cereus GW-01 to degrade β-CY and promote the growth of Pak choi (Brassica chinensis L.). GW-01 degraded β-CY on Pak choi leaves, achieving over 90 % degradation after 9 days. It improved photosynthetic efficiency, increased chlorophyll content by 36.6 %, and enhanced antioxidant activity. Compared to plants treated with β-CY alone, GW-01 treatment boosted net photosynthetic rate by 27.78 %, reduced reactive oxygen species by 29.45 %, and increased glutathione by 32.36 %. Furthermore, GW-01 reduced the activities of key enzymes in ethylene biosynthesis, leading to lower ethylene and salicylic acid levels. GW-01 exhibited growth-promoting traits, including siderophore production and indole-3-acetic acid synthesis. We first reported the B. cereus colonizing multiple plant compartments and altering the microbial community, offering potential for developing biofertilizers to degrade pesticide residues and improve crop quality.
高效氯氰菊酯（β-CY）是一种广泛使用的杀虫剂，它会对植物生长产生负面影响并污染农作物。在本研究中，我们调查了蜡样芽孢杆菌GW-01降解β-CY以及促进小白菜（Brassica chinensis L.）生长的能力。GW-01在小白菜叶片上降解β-CY，9天后降解率超过90%。它提高了光合效率，叶绿素含量增加了36.6%，并增强了抗氧化活性。与仅用β-CY处理的植物相比，GW-01处理使净光合速率提高了27.78%，活性氧减少了29.45%，谷胱甘肽增加了32.36%。此外，GW-01降低了乙烯生物合成关键酶的活性，导致乙烯和水杨酸水平降低。GW-01表现出促进生长的特性，包括产生铁载体和合成吲哚-3-乙酸。我们首次报道了蜡样芽孢杆菌定殖于多个植物部位并改变微生物群落，这为开发生物肥料以降解农药残留和改善作物品质提供了潜力。
