THE PROCESS IN MOTION

Where do the microorganisms come from?

Start the scene or choose a stage. The animation simplifies the mechanism; what follows gives the details and the available references.

▶ Play the process01Active well before the tank02Soil and fruit share their microbes03Three things weigh in04A lead, not a result

Active well before the tank

A 2024 review, signed by Gisele Xavier Ribeiro Costa at the Federal University of Uberlândia, gathers what the literature knows about it. First, the microflora is present and active at every stage, from the plant to the harvested fruit: opening a fermentation means taking over from something.

Read the stages without animation

1. Active well before the tankA 2024 review, signed by Gisele Xavier Ribeiro Costa at the Federal University of Uberlândia, gathers what the literature knows about it. First, the microflora is present and active at every stage, from the plant to the harvested fruit: opening a fermentation means taking over from something.
2. Soil and fruit share their microbesIt comes from the growing and processing environment, and the soil and the fruit share microorganisms: what lives under the tree is found in the cherry.
3. Three things weigh inThe review finds similar microorganisms from one region, process and variety to another, but communities that are globally different from one study to another: the environment, the genetics of the plant and the type of processing all three weigh in.
4. A lead, not a resultIt is a literature review: it organizes what exists, it adds no data. It concludes on a perspective, selecting specific microbial groups to inoculate them, which remains to be proven.

To remember: A tank recipe is not enough to predict which microbes will take over.

Read the full article and its sources ↓

This whole plate describes what is fermented and how. It never said where the microorganisms that do the work come from.

A 2024 review, signed by Gisele Xavier Ribeiro Costa at the Federal University of Uberlândia, gathers what the literature knows about it. Three points stand out.

First, this microflora is active well before the tank: it is present and metabolically active at every stage, from the plant to the harvested fruit. When a fermentation is opened, a sterile medium is not being inoculated, one is taking over from something.

Second, it comes from the growing and processing environment, and above all: soil and fruit share microorganisms. What lives under the tree is found in the cherry. This is the missing link between agronomy and fermentation, and it ties this plate to what plate XVIII says about mycorrhizae.

Finally, the review finds similar microorganisms from one region, process and variety to another, but communities that are overall different from one study to another. This confirms, without quantifying it, that the environment, the genetics of the plant and the type of processing all three weigh in.

Two honest reservations. It is a literature review, not a new measurement: it organizes what exists, it adds no data. And it concludes, like almost this entire field, on a prospect rather than on a result: selecting precise microbial groups to inoculate them. This is a lead, and it remains to be proven.

Costa, Processos de fermentação e suas influências na qualidade do café (Coffea arabica), master's thesis in food engineering, Universidade Federal de Uberlândia, 2024, DOI 10.14393/ufu.di.2024.57