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Review
. 2023 Apr 21;11(4):1088.
doi: 10.3390/microorganisms11041088.

Plant Growth-Promoting Rhizobacteria for Sustainable Agricultural Production

Luana Alves de Andrade  1 , Carlos Henrique Barbosa Santos  1 , Edvan Teciano Frezarin  1 , Luziane Ramos Sales  1 , Everlon Cid Rigobelo  1
Affiliations
Review

Plant Growth-Promoting Rhizobacteria for Sustainable Agricultural Production

Luana Alves de Andrade et al. Microorganisms. .

Abstract

Rhizosheric bacteria with several abilities related to plant growth and health have been denominated Plant Growth-Promoting Rhizobacteria (PGPR). PGPR promote plant growth through several modes of action, be it directly or indirectly. The benefits provided by these bacteria can include increased nutrient availability, phytohormone production, shoot and root development, protection against several phytopathogens, and reduced diseases. Additionally, PGPR can help plants to withstand abiotic stresses such as salinity and drought and produce enzymes that detoxify plants from heavy metals. PGPR have become an important strategy in sustainable agriculture due to the possibility of reducing synthetic fertilizers and pesticides, promoting plant growth and health, and enhancing soil quality. There are many studies related to PGPR in the literature. However, this review highlights the studies that used PGPR for sustainable production in a practical way, making it possible to reduce the use of fertilizers such as phosphorus and nitrogen and fungicides, and to improve nutrient uptake. This review addresses topics such as unconventional fertilizers, seed microbiome for rhizospheric colonization, rhizospheric microorganisms, nitrogen fixation for reducing chemical fertilizers, phosphorus solubilizing and mineralizing, and siderophore and phytohormone production for reducing the use of fungicides and pesticides for sustainable agriculture.

Keywords: food production; nitrogen fixation; phosphorus solubilization; siderophores.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic representation of the steps required to isolate and characterize bacteria that promote plant growth.
Figure 2
Figure 2
This schematic diagram compares uninoculated plants with those that have been inoculated with bacterial endophytes, illustrating several important benefits of this process for promoting plant growth in crops. These benefits include increased aerial growth, reduced susceptibility to disease, enhanced nutrient uptake, improved root growth, reduced presence of harmful phytopathogens, and induced systemic resistance. By harnessing the power of beneficial bacteria within plants, farmers can ensure healthier and more productive crops, leading to higher yields and better food security.
Figure 3
Figure 3
Modes of application of PGPR.
See this image and copyright information in PMC

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