Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

Abstract

As a major food crop, rice (Oryza sativa) is produced and consumed by nearly 90% of the population in Asia with less than 9% produced outside Asia. Hence, reports on large scale grain losses were alarming and resulted in a heightened awareness on the importance of rice plants’ health and increased interest against phytopathogens in rice. To serve this interest, this review will provide a summary on bacterial rice pathogens, which can potentially be controlled by plant growth-promoting bacteria (PGPB). Additionally, this review highlights PGPB-mediated functional traits, including biocontrol of bacterial rice pathogens and enhancement of rice plant’s growth. Currently, a plethora of recent studies address the use of PGPB to combat bacterial rice pathogens in an attempt to replace existing methods of chemical fertilizers and pesticides that often lead to environmental pollutions. As a tool to combat bacterial rice pathogens, PGPB presented itself as a promising alternative in improving rice plants’ health and simultaneously controlling bacterial rice pathogens in vitro and in the field/greenhouse studies. PGPB, such as Bacillus, Pseudomonas, Enterobacter, Streptomyces, are now very well-known. Applications of PGPB as bioformulations are found to be effective in improving rice productivity and provide an eco-friendly alternative to agroecosystems.

Identifying Hidden Viable Bacterial Taxa in Tropical Forest Soils Using Amplicon Sequencing of Enrichment Cultures

“…Many of them have been considered as vital drivers in bio-geological processes [2]. Certain microbes are found to be beneficial in a variety of ways, such as enhancing plant production [3] or controlling pathogens [4]. However, they also possess some adverse effects, such as causing plant diseases [5,6].…”

Isolation, Characterization, and Evaluation of Native Rhizobacterial Consortia Developed From the Rhizosphere of Rice Grown in Organic State Sikkim, India, and Their Effect on Plant Growth

“…An assortment of abiotic and biotic elements shape soil-and plant-related living spaces and adjust the creations and exercises of their microbial networks, which thus bear upon the nature of their development of plants and the creation of root exudates ( Jain et al, 2020 ). Bacteria harbor in roots, depending on the incredible variety of natural root exudates, which in the long run influences the growth and development of the plant ( Ngalimat et al, 2021 ). Here, in this study, we examined the impact of rice rhizosphere regulated with local bacterial consortia developed to increase the uptake the N/P/K as nutrients from the soil.…”

Selection of Endophytic Strains for Enhanced Bacteria-Assisted Phytoremediation of Organic Pollutants Posing a Public Health Hazard

“…The antibiotics produced by these bacteria have an inhibitory or killing effect on phytopathogens. In addition, it has been found that some of these compounds also have antiviral, anticancer, antioxidant, and cytotoxic properties [90,108]. The antibiotics produced by Bacillus include bacilysin, chlortetain, subtilin, bacillaene, or surfactin.…”

“…The antibiotics produced by Bacillus include bacilysin, chlortetain, subtilin, bacillaene, or surfactin. Strains representing the genus Pseudomonas were found to have the ability to synthesize 2,4diacetyl phloroglucinol (DAPG), pseudomonic acid, phenazine-1-carboxylic acid (PCA), pyoluteorin, pyrrolnitrin, or oomycin A [90,108].…”

“…The plant defense process is controlled by NPR1 regulatory proteins. In the case of bacteria, lipopolysaccharide (LPS), siderophores, volatile compounds, such as 2,3-butanediol, or flagelles, can be signals causing ISR in a plant [108,109]. Microorganisms capable of inducing ISR include, inter alia, bacteria of the genus Bacillus spp.…”