Use of Plant Growth-Promoting Rhizobacteria in Maize and Sugarcane: Characteristics and Applications

Abstract

Free-living bacteria that actively colonize plant roots and provide positive effects on plant development are called plant-growth promoting. Plant growth-promoting bacteria can promote plant growth and use their own metabolism to solubilize phosphates, produce hormones and fix nitrogen, and they can directly affect plant metabolism. PGPR also increase plant absorption of water and nutrients, improving root development and increasing plant enzymatic activity; moreover, PGPR can promote other microorganisms as part of a synergistic effect to improve their effects on plants, promoting plant growth or suppressing pathogens. Many studies have shown several benefits of the use of PGPR in maize and sugarcane crops. These bacteria are an excellent alternative to farmers to reduce chemical fertilization and pesticide input without promoting the environment impact and yield-reducing. The present review is an effort to elucidate the concept of rhizobacteria in the current scenario and their underlying mechanisms of plant growth promotion with recent updates. The latest paradigms of a wide range of applications of these beneficial rhizobacteria in both crops maize and sugarcane have been presented explicitly to garner broad perspectives regarding their functioning and applicability. The results from several studies have shown that the utilization of PGPR in maize and sugarcane is the great alternative to farmers face the challenge the modern agriculture.

Metagenomic insights into the bacterial community structure and functional potentials in the rhizosphere soil of maize plants

“…However, potassium metabolism was more in the Ventersdorp rhizosphere (Figure 4(A)). Research studies on maize crops have shown that increased potassium metabolism arises from stimulation of root growth or elasticity of root hair by bacteria for plant growth and development (dos Santos et al 2020;Meena et al 2014;Singh et al 2010). The maize plants would have poorly formed roots without sufficient potassium availability, grow slowly, generate have lower crop yields and increase susceptibility to disease and pests (Meena et al 2014).…”

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

“…PGPR also secrete abscisic acid, which stimulates growth activities under stress. It is secreted by many PGPR such as Azospirillum brasilense, Bacillus subtilis, Bacillus licheniformis, and Pseudomonas putida (Cohen et al, 2008;Dos Santos et al, 2020;Kousar et al, 2020). Ethylene is a gaseous hormone which controls fruit ripening (Masood et al, 2012;Nazar et al, 2014).…”

Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

“…The role of PGPR in solubilizing and oxidizing other essential plant nutrients, such as potassium, sulfur, and micronutrients, and their effects on plant growth-promotion are far less studied compared to N, P, and Fe. For more information regarding the role of PGPR in providing these elements to plants, the reader can consult recent publications on this topic [110,111].…”