Towards sustainable food production! "Quality stabilization" of microbial materials.

Efficiently microbial resource development of our company's unique mycorrhizal fungi! Storage methods for arbuscular mycorrhizal fungi.

The representative arbuscular mycorrhizal fungi coexist with the roots of various crops, absorbing nutrients (especially phosphorus) from the soil and supplying them to the crops. Therefore, they are utilized as environmentally friendly microbial materials to reduce phosphorus fertilizer. The current materials are obtained through "co-cultivation," but there are challenges remaining in mass production and quality stabilization, leading to considerations for materialization through "pure culture." Our group has discovered an efficient pure culture method by adding fatty acids such as myristic acid to the medium during the culture of parent spores. However, since the microbial materials obtained from pure cultures are stored in refrigeration until they are used in the field, we are examining production conditions for next-generation spores that can maintain sufficient germination rates even after refrigeration. By adding not only myristic acid but also palmitic acid to the medium, we can approach the germination rates achieved through co-cultivation, contributing to the "quality stabilization" following the mass production of microbial materials. [Summary] - Established an efficient pure culture method for mycorrhizal fungi by adding fatty acids to the medium. - Further innovations in the fatty acids added to the medium for the materialization of spores suitable for refrigeration storage. - Technical guidance is possible for the materialization of unique strains held by various companies, rather than a monopoly on technology by a single company.

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