Growth-Promoting Fungi (PGPR): Natural Enhancement of Agricultural Yield

Plant growth-promoting fungi (PGPR) represent a biotechnological solution to maximize crop yields without resorting to harsh chemicals. These fungi interact positively with the roots, stimulating plant growth and protecting against pests. In this article, you will learn what PGPR are, their benefits, main species, and how to use them in modern agriculture.

Vigorous agricultural field thanks to plant growth-promoting fungi.

What are Plant Growth-Promoting Fungi (PGPR)?

PGPR are fungi that improve plant development through various mechanisms, such as the production of phytohormones, nutrient mobilization, and protection against pathogens. They often colonize the rhizosphere and roots, creating a more favorable environment for growth.

Roots colonized by plant growth-promoting fungi showing nutrient absorption.

Main species of PGPR and their characteristics

Here are some of the most common plant growth-promoting fungi and their characteristics:

Beauveria bassiana: In addition to promoting growth, it acts as a biological control of pests, especially soil insects.
Metarhizium anisopliae: It favors the strengthening of the root system and provides protection against insects such as worms and beetles.

Beauveria bassiana promoting growth and controlling pests in roots.

Benefits of PGPR in agriculture

PGPR offer multiple advantages that favor both agricultural production and the sustainable management of natural resources:

Stimulation of plant growth: They improve the synthesis of hormones such as auxins and gibberellins.
Biological control of pests: Some PGPR attack insects that damage roots, reducing the use of pesticides.
Better nutrient uptake: They increase the availability of nitrogen, phosphorus, and other essential elements.
Strengthening of the root system: More robust roots improve the uptake of water and nutrients.

Comparison between crops treated with PGPR and untreated crops.

Practical implementation in agricultural crops

To take advantage of the benefits of PGPR, it is advisable to use commercial formulations that contain active spores. Its application can be done by irrigation, seed treatment, or directly into the soil at the time of planting.

Application of biofertilizer with PGPR in an agricultural field.

Conclusion

Plant growth-promoting fungi represent a key tool to optimize agricultural yield sustainably. Their ability to promote growth and protect crops against pests makes them fundamental allies for modern agricultural production.

Successful harvest with vigorous plants thanks to plant growth-promoting fungi.

References

Vega, F. E., et al. (2009). Fungal entomopathogens: New insights on their ecological roles. Fungal Ecology, 2(4), 149-159.
Rangel, D. E. (2011). Stress tolerance in entomopathogenic fungi. Mycological Progress, 10(1), 89-98.