Biological control efficacy of Bacillus licheniformis HG03 against soft rot disease of postharvest peach. (March 2023)

• Record Type: Journal Article
• Authors: Wang, Xiaoli; Zhu, Jingfeng; Wei, Huan; Ding, Zhipeng; Li, Xiran; Liu, Zao; Wang, Hongbao; Wang, Yunpeng
• Is Part Of: Food control. Volume 145(2023)
• Publication Date: 2023-03
• Subjects: Bacillus licheniformis HG03 -- Peach -- Soft rot disease -- Rhizopus stolonifer -- Biological control; Food -- Quality -- Periodicals; Food -- Analysis -- Periodicals; Food handling -- Periodicals; Food industry and trade -- Quality control -- Periodicals; Aliments -- Industrie et commerce -- Qualité -- Contrôle -- Périodiques; Aliments -- Qualité -- Périodiques; Aliments -- Analyse -- Périodiques; Hygiène alimentaire -- Périodiques; Food -- Analysis; Food handling; Food -- Quality; Periodicals; Electronic journals; 664.07
• DOI: 10.1016/j.foodcont.2022.109402
• Languages: English
• ISSNs: 0956-7135

Abstract

Abstract: This study aimed to investigate the biocontrol ability of Bacillus licheniformis HG03 against Rhizopus stolonifer causing agent of peach fruit rot and explore its mechanism. The biocontrol strain B. licheniformis HG03 was applied on inhibition of the pathogen Rhizopus stolonifer, which is expected to improve the preservation of peach fruit. The results revealed that the peach treated with B. licheniformis HG03 were significantly more resistant to postharvest soft rot when stored at 20 °C and high humidity. Comparison to the control, treatment with HG03 improved the activity of related enzymes and balanced the metabolism of reactive oxygen species. Such treatment reduced the accumulation of lipid peroxidation products and enhanced free radical scavenging ability of peaches. Furthermore, the transcriptome analysis revealed that the HG03 treatment activated MAPK signaling pathway, induced the expression of antioxidant activity-related genes and different WRKY transcription factors in plant pathogen interaction metabolic pathway. Hence, the results revealed that HG03 treatment is an effective biological control method to improve peach fruit disease resistance and prolong the storage time of peaches. Highlights: Bacillus licheniformis HG03 delayed soft rot development when applied to peaches stored at 20 °C at high humidity. Presence of B. licheniformis HG03 led to the elevated activity of plant enzymes associated with disease resistance. HG03 improved the free-radical-scavenging ability and disease resistance of fruit. B. licheniformis HG03 upregulated a number of plant genes known to enhance resistance to pathogens.