Plant Growth Promoting Rhizobacteria (PGPR)
What are plant growth promoting rhizobacteria. PGPR are a group of bacteria capable to actively colonize the plants root system and improve their growth and yield (Wu et al., 2005). They colonize all ecological niches of root to all stages of plant development, even in the presence of a competing microflora.
Description
Plant Growth-Promoting Rhizobacteria (PGPR) are beneficial bacteria that colonize plant roots and enhance plant growth and health. PGPR can ¹:
– Produce plant hormones and other growth-promoting substances
– Increase nutrient availability and uptake
– Protect plants from pathogens and diseases
– Improve soil structure and fertility
– Enhance plant tolerance to abiotic stresses
Some common types of PGPR include ¹:
– Siderophores: produce iron-chelating compounds
– Nitrogen fixers: convert atmospheric nitrogen to plant-available forms
– Phosphate solubilizers: make phosphorus more available to plants
– Auxin producers: produce plant growth regulators like IAA
– ACC deaminase producers: mitigate plant stress responses