数字农科院2.0

Graphene oxide enhances the dual role of Beauveria bassiana in biocontrol of the Asian corn borer and promotion of the maize seedling growth under field conditions

文献类型： 外文期刊

作者： Zhaofeng Zhan;Raufa Batool;Xiuping Wang;Hailiang Han;Yeeyee Myint;Zhenying Wang;Yongjun Zhang;Jingfei Guo

作者机构：

关键词： Beauveria bassiana;Benzoxazinoid;Graphene oxide;Nanocomposite;Ostrinia furnacalis;Phytohormone signaling;Zea mays

期刊名称： Chemical Engineering Journal

ISSN： 1385-8947

年卷期： 2026 年 529 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The burgeoning demand for sustainable pest control has driven the integration of nanotechnology with biocontrol agents. This study explores the use of graphene oxide (GO) as a nanocarrier to enhance the efficacy of Beauveria bassiana (Bb) against Ostrinia furnacalis (Asian corn borer, ACB), while concurrently enhancing the maize growth. GO-Bb nanocomposite at a concentration ratio of 4:1 demonstrated remarkable improvements in the thermal stability and ultraviolet resilience of Bb. At a concentration of 20 μg/mL, 61.4% spore germination rate was observed at 40 °C. Furthermore, the 37.2% of inactivation rate of Bb spores was recorded which was significantly higher than the Bb spores protected with 20 μg/mL GO (25.2 and 24.6%) following exposure to ultraviolet radiation for 4 and 6 h, respectively. The colonization rate of Bb in maize increased to 100% at 14- and 83.33% at 21 days after emergence. Field experiments revealed that GO-Bb nanocomposite significantly reduced the ACB damage on maize plants 28 days after germination. Uptake of the GO-Bb nanocomposite activated phytohormone signaling pathways and boosted insect-resistance. Weighted gene coexpression network analysis of DEG revealed the upregulation of an abscisic acid-responsive gene, ABR1, following GO-Bb treatment at 12 h post ACB infestation. ACB damage over 24 h can lead to higher concentrations of DIMBOA-Glc, HDMBOA-Glc, MBOA, HM2BOA-Glc, and DIM2BOA-Glc in the GO-Bb treatment than CK and Bb. Additionally, the GO-Bb treatment significantly upregulated the gene expression of BX10, a marker gene associated with BX-regulated defense, even in the absence of ACB damage. These findings underscore the dual benefits of GO-Bb nanocomposite. It has the capability to integrate pest management with the promotion of plant growth synergistically. By enhancing Bb's pathogenicity and activating maize's defense pathways, it offers a sustainable alternative for integrated pest management. Future research should explore its extensive applications within crop protection and sustainable agriculture.

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