Plant Growth-Promoting Rhizobacteria (PGPR): Current and Future Prospects for Crop Improvement

Gupta, Kapil; Dubey, Neeraj; Singh, S. P.; Kheni, Jasmin Kumar; Gupta, Shubhra; Varshney, Akash

doi:10.1007/978-981-15-6949-4_9

Cited by 84 publications

(124 citation statements)

References 134 publications

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“…Different PGPRs, biochar and NPK positively affected the morphological and biochemical attributes of sunflowers. The PGPRs probably competed with the pathogens in dual ways, i.e., either by competing for nutrients or producing antibiotics, hydrogen cyanide and siderophores, all of which suppress pathogens [19,24,26]. However, these were not measured in the current study; therefore, they should be considered in future studies.…”

Section: Discussionmentioning

confidence: 87%

“…These PGPRs include Azotobacter, Azospirillum and Klebsiella, all of which are used to improve the crop productivity [24,25]. The PGPRs compete with the pathogens in dual ways, i.e., either compete for nutrients or produce antibiotics, hydrogen cyanide and siderophores, all of which suppress pathogens [19,24,26]. The PGPRs are ecofriendly and can be effectively used for suppressing plant pathogens.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sulfur Application Combined with Planomicrobium sp. Strain MSSA-10 and Farmyard Manure Biochar Helps in the Management of Charcoal Rot Disease in Sunflower (Helianthus annuus L.)

et al. 2021

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Sunflower (Helianthus annuus L.), a member of the Asteraceae, is one of the major oilseed crops around the world. Charcoal rot caused by Macrophomina phaseolina (Tassi) Goid is the most damaging disease of sunflowers globally. Fungicides are mostly used to control charcoal rot; however, these cause environmental pollution and pose adverse effects on the ecosystem. Therefore, ecofriendly management options are inevitable for the management of charcoal rot disease. Plant mineral nutrition, the use of plant growth-promoting rhizobacteria and biochar have recently been manipulated for the management of different plant diseases. However, the interactive effects of all these treatments have rarely been tested on charcoal rot suppression in sunflowers. This study assessed the influence of sulfur (0 and 2.25 mg/kg) combined with farmyard manure biochar (2%), NPK (20:20:20 mg/kg) and three different plant growth-promoting rhizobacteria (PGPR) strains on the charcoal rot suppression growth, yield, biochemistry and physiology of sunflower. The PGPR strains included in the study were Bacillus sp. strain MR-1/2 (regarded as PGPR1), Achromobacter sp. strain FB-14 (regarded as PGPR2) and Planomicrobium sp. strain MSSA-10 (regarded as PGPR3). The charcoal rot infestation was induced by inoculating the soil with M. phaseolina, and the impacts of the different treatments were studied on the disease infestation, growth, yield, biochemistry and physiology of sunflowers under 0 and 2.25-mg/kg S application. The results revealed that farmyard manure biochar and Planomicrobium sp. strain MSSA-10 in combination with 2.25-mg/kg S proved effective for the management of charcoal rot disease through regulating the antioxidant enzymes’ activities and strengthening the immune system of sunflower plants. The studied health markers (total chlorophyll content and carotenoids) and stress markers (total protein content, catalase and peroxidase) were significantly altered by the applied treatments under 0 and 2.25-mg/kg S applications. The findings of the experiment indicated that both farmyard manure biochar and Planomicrobium sp. strain MSSA-10, combined with 2.25-mg/kg S, could be used to enhance the crop yield and manage charcoal rot disease in sunflowers. Farmyard manure biochar and Planomicrobium sp. strain MSSA-10 are an easy-to-apply, cost-effective, ecofriendly and sustainable option for the management of charcoal rot disease in sunflowers.

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Sulfur Application Combined with Planomicrobium sp. Strain MSSA-10 and Farmyard Manure Biochar Helps in the Management of Charcoal Rot Disease in Sunflower (Helianthus annuus L.)

et al. 2021

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“…On this basis, it could be likely that genes of PGPR might be identified by their particular plant-beneficial functions and used for gene editing or transgenic approaches [73]. For instance, certain tumor-inducing Agrobacterium strains have the potential to promote plant growth on non-susceptible plant hosts [74], and bacteria genes directly conferring plant-beneficial properties, such as nif (nitrogen fixation) or phl (phloroglucinol synthesis), have been identified [75].…”

Section: Future Prospects Of Biofertilizersmentioning

confidence: 99%

“…Nano fertilizers are non-toxic, minimize production costs, and increase the nutrients use efficiency. Encapsulation of nano biofertilizers will contribute to extend the release of PGPR to target cell by a conjugation of gold, aluminum, and silver nanoparticles [75].…”

Section: Future Prospects Of Biofertilizersmentioning

confidence: 99%

Use of Biofertilizers in Agricultural Production

Zambrano-Mendoza¹,

Sangoquiza-Caiza²,

Campaña-Cruz³

et al. 2021

Technology in Agriculture

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Most of agricultural production in Latin America consists of smallholder farmers who need the development of sustainable technologies, with costs according to their economic condition. Biofertilizers composed of free-living bacteria promote plant’s growth, improve productivity through the strengthening of its roots, and reduce the amount of synthetic fertilizer applied to the crops. The aims of this chapter are to highlight the microorganisms commonly used in agriculture as biofertilizers and the main researches carried out in several countries of Latin America, and to describe the development of an experimental biofertilizer for maize, based on strains of Azospirillum spp. and Pseudomonas fluorescens, in the highlands (Sierra Region) of Ecuador. Seven phylum and 95 genera o microorganism used as biofertilizers or Plant Growth-Promoting Rhizobacteria (PGPR) are summarized, along with the benefits, challenges and future prospect of their use. The effectiveness of the experimental biofertilizer developed in Ecuador was demonstrated through several experiments at the green house and field, in which it was evident the increase of root’s size, the amount of crocket, the percentage of dry matter, and the crops´ yield. The evaluations, accomplished on farmers’ fields showed 30% of increase in yield and 21% of decrease in the cost of production per kilogram; as a consequence of the use of biofertilizer plus 50% of the recommended chemical fertilization, in comparison with standard farming techniques. Farmers can reduce the application of synthetic fertilizers and sustainably increase crop yield through the use of this technology.

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“…Thus, there is an urgent need to introduce an environment-friendly approach for sustainable agriculture to feed the growing population worldwide [13]. Beneficial rhizobacteria may enhance crop productivity and improve plant growth by handling the stressful conditions of plants, such as plant diseases, pest attacks, and various biotic and abiotic stresses in a sustainable manner [13,14]. Increasing evidence of earlier research revealed that beneficial rhizobacteria could enhance soil fertility, nutrient bioavailability, and plant growth and development while maintaining the surrounding environment in an ecofriendly manner [15,16].…”

Section: Introductionmentioning

confidence: 99%

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

et al. 2021

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Climate change imposes biotic and abiotic stresses on soil and plant health all across the planet. Beneficial rhizobacterial genera, such as Bacillus, Pseudomonas, Paraburkholderia, Rhizobium, Serratia, and others, are gaining popularity due to their ability to provide simultaneous nutrition and protection of plants in adverse climatic conditions. Plant growth-promoting rhizobacteria are known to boost soil and plant health through a variety of direct and indirect mechanisms. However, various issues limit the wider commercialization of bacterial biostimulants, such as variable performance in different environmental conditions, poor shelf-life, application challenges, and our poor understanding on complex mechanisms of their interactions with plants and environment. This study focused on detecting the most recent findings on the improvement of plant and soil health under a stressful environment by the application of beneficial rhizobacteria. For a critical and systematic review story, we conducted a non-exhaustive but rigorous literature survey to assemble the most relevant literature (sorting of a total of 236 out of 300 articles produced from the search). In addition, a critical discussion deciphering the major challenges for the commercialization of these bioagents as biofertilizer, biostimulants, and biopesticides was undertaken to unlock the prospective research avenues and wider application of these natural resources. The advancement of biotechnological tools may help to enhance the sustainable use of bacterial biostimulants in agriculture. The perspective of biostimulants is also systematically evaluated for a better understanding of the molecular crosstalk between plants and beneficial bacteria in the changing climate towards sustainable soil and plant health.

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Plant Growth-Promoting Rhizobacteria (PGPR): Current and Future Prospects for Crop Improvement

Cited by 84 publications

References 134 publications

Sulfur Application Combined with Planomicrobium sp. Strain MSSA-10 and Farmyard Manure Biochar Helps in the Management of Charcoal Rot Disease in Sunflower (Helianthus annuus L.)

Sulfur Application Combined with Planomicrobium sp. Strain MSSA-10 and Farmyard Manure Biochar Helps in the Management of Charcoal Rot Disease in Sunflower (Helianthus annuus L.)

Use of Biofertilizers in Agricultural Production

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

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