Document Type : Review Article

Author

Agricultural Research, Education and Extension Organization, Soil and Water Research Institute (SWRI), Karaj, Iran

10.22034/jpbb.2021.129056

Abstract

The growing body of evidence suggests that plant-growth-promoting rhizobacteria (PGPRs) are among most important soil microorganisms that could potentially affect the sustainable growth of plant species. To date, scientific investigations unraveled that various types of PGPRs have been isolated from agricultural soils that showed potential benefits to produce phytohormones, biocontrol agents, plant growth stimulants, and enhance soil quality. The majority of researches that have been conducted on PGPRs mainly focused on the applications of these strains for agricultural proposes. During the past decades, the application of PGPRs to enhance the growth of edible mushrooms mycelia has significantly received much attention from researchers. According to estimations, the global market of edible mushrooms has been increased during the past years because of increasing demands for regular consumption of specific types of cashing mushrooms. In this regard, several studies reported that a variety of PGPRs such as Pseudomonas strains have the capability to increase the growth of fungal mycelia through secretion of specific types of metabolites into compost and casing soil materials. Researches also highlighted this fact that PGPRs could suppress the development of mushroom pathogens such as Trichoderma agrressivum that are highly remarkable concerns for commercial mushroom growers. The ability of PGPRs to control fungal pathogens and enhance the growth of edible mushrooms is depending on several factors such the strain of bacteria, target edible mushrooms and the quality of mushroom producing compartments. However, the specification of PGPRs for sustainable growth of edible mushrooms is still required extensive researches on these strains to display bacteria biological mode of action to modify the quality mushroom growth and increase mushroom yield. In this respect, the current paper deals with recent trends on the application of PGPRs for improving the cultivation of commercial cashing mushrooms and tries to provide a perspective for large-scale application of beneficial bacterial strains for edible mushroom industry.     

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