Antagonistic bioagent mechanisms of controlling potato soft rot

Abstract

Bacterial antagonists are effective as an alternative to synthetic bactericides in the control of potato soft rot. The use of bioagents reduces the application of synthetic bactericides, which are harmful to humans and the environment. However, the mechanisms of some bioagents, such as some fungi and bacteria, are not yet understood. This paper reviews the current situation of potato soft rot, biological controls, antagonistic bioagents and their mechanisms, application strategies and future directions in today’s agriculture. These mechanisms include mycoparasitism, competition, rhizosphere colonisation, synthesis and release of metabolites. Bioagents increased the defensive system of plants by increasing the antioxidants genes, such as superoxide dismutase, peroxidase (POD) and catalase (CAT), and eventually increased the plant growth and yield production.

Isolation and Identification of Endophytic Bacteria Bacillus sp. ME9 That Exhibits Biocontrol Activity against Xanthomonas phaseoli pv. manihotis

“…The above results indicate that improving the assimilation and utilization efficiency of nitrate can promote the growth of plants and indirectly enhance plant disease resistance [ 86 , 87 ]. In addition, the defensive systems of plants could be enhanced by the bioagents, by increasing the antioxidant genes, which would eventually increase plant growth and yield production [ 88 ].…”

Sustainable Management of Diseases in Horticulture: Conventional and New Options

“…Potato is another crop that largely benefits from the utilisation of biocontrol agents to prevent tuber soft rotting caused by Pectobacterium spp., Dickeya spp., and Clostridium spp. [160]. The overall strategy includes soaking potato tubers prior to sowing in a solution containing Pseudomonas fluorescens strains to prevent future colonisation by pathogens.…”

“…Finally, cocktails of biocontrol agents in the form of a solution or powder are used to protect harvested tubers during storage. In this case, the tubers are soaked in the solution prior to storage [160]. A significant reduction in economic losses caused by rice blast incited by Magnaporthe oryzae is expected to be obtained through the application of Streptomyces strains as biocontrol agents [161,162].…”

Biological control of major pathogenic bacteria of potato by Bacillus amyloliquefaciens strains SS-12.6 and SS-38.4

“…has expanded significantly (Helepciuc & Todor, 2022). Numerous studies have shown the great potential of B. amyloliquefaciens in suppressing R. solanacearum, as well as bacteria from the genus Pectobacterium (Chen et al, 2019;Osei et al, 2021). In this study, two B. amyloliquefaciens strains, , with previously proven antagonistic potential against several pathogens, were examined for antimicrobial activity against pathogenic bacteria isolated from the potato in Serbia using in vitro, in situ, and in planta tests to find effective and environmentally friendly control agents against destructive potato diseases.…”