However, a team led by Wisnu Adi Wicaksono and Gabriele Berg from the Institute of Environmental Biotechnology at Graz University of Technology (TU Graz) has now succeeded in proving that plant microorganisms from fruit and vegetables contribute to the human microbiome. They report this in a study published in the journal
The authors were able to demonstrate that the frequency of fruit and vegetable consumption and the variety of plants consumed influence the amount of fruit- and vegetable-associated bacteria in the human gut. Early childhood in particular represents a window of opportunity for colonization with plant-associated bacteria. It was also demonstrated that the microorganisms of plant origin have probiotic and health-promoting properties.
A microbiome is the totality of all microorganisms that colonize a macroorganism (human, animal, plant) or a part of it, for example, the intestine or a fruit. While the individual microbiomes are becoming better understood, little is known about their connections.
“The proof that microorganisms from fruits and vegetables can colonize the human gut has now been established for the first time,” explains first author Wisnu Adi Wicaksono. This suggests that the consumption of fruit and vegetables, especially in infancy, has a positive influence on the development of the immune system in the first three or so years of life, as the intestinal microbiome develops during this time.
But even after that, a good diversity of gut bacteria is beneficial for health and resilience. “It simply influences everything. Diversity influences the resilience of the whole organism; higher diversity conveys more resilience,” says Institute head Gabriele Berg.
Clinical Trials In Human Sequences Fruit &Vegetable Microbiome in Human Gut
In order to be able to determine that the consumption of fruits and vegetables and their microbiomes actually leads to changes in the intestinal microbiome, the team first created a catalog of microbiome data from fruits and vegetables which enabled them to assign their bacteria.
They compared these with publicly available data from two studies on intestinal flora. The TEDDY project looked at the development of babies in a long-term study and the American Gut Project studied the intestinal microbiome of adults – both projects also collected data on the food intake of the test persons.
In total, the researchers had metagenome data from around 2,500 stool samples at their disposal, each of which contained between one and ten million sequences – several billion sequences were thus evaluated. Using this extensive data set, the presence of fruit and vegetable microflora in the gut could be demonstrated. This evidence is a crucial building block in proving the WHO’s One Health concept, which closely links human, animal, and environmental health.
Further Research On Preserving Plant Microbiome
To further explore this connection, together with international colleagues and within the EU-funded HEDIMED project (www.hedimed.eu) Gabriele Berg at the Institute of Environmental Biotechnology is already working on an intervention study in which people on three continents eat exactly the same things for a certain period of time, following which their excretions are analyzed.
But even beyond that, Gabriele Berg sees many areas that could be influenced on the basis of the study’s findings. This starts with food production, as soil, fertilizer, and pesticides affect the plant microbiome.
“Fresh fruit and vegetables will always have the best microbiome; agriculture or processing companies already have a major influence here. And the storage and processing of food must also be critically reconsidered,” explains Berg.
Reference :
- The edible plant microbiome: evidence for the occurrence of fruit and vegetable bacteria in the human gut – (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10519362)
Source: Eurekalert
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