Plant Growth-Promoting Rhizobacteria (PGPR) as Biofertilizers and Biopesticides

Riaz, Umair; Murtaza, Ghulam; Anum, Wajiha; Samreen, Tayyaba; Sarfraz, Maliha; Nazir, Muhammad Zulqernain

doi:10.1007/978-3-030-48771-3_11

Cited by 92 publications

(58 citation statements)

References 70 publications

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“…In addition, PGPR might also increase nutrient uptake by plants from soil and thereby reduce inorganic fertilizer requirements. As well as, PGPR suppress the pathogens by producing antibiotics and siderophores or bacterial and fungal antagonistic substances and/or by producing biologically active substances such as hydrogen cyanide (HCN) and ammonia (Nishma et al 2014;El-Sayed andHagab, 2020;Yaseen et al 2020;Riaz et al, 2021 andAbdel Latef et al 2021).…”

Section: Plantmentioning

confidence: 99%

New strains of plant growth-promoting rhizobacteria in combinations with humic acid to enhance squash growth under saline stress

et al. 2021

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Section: Plantmentioning

confidence: 99%

New strains of plant growth-promoting rhizobacteria in combinations with humic acid to enhance squash growth under saline stress

et al. 2021

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“…Phosphorus solubilizing bacteria (PSB) has been reported to reduce required P dosage by 25% (Sundara et al, 2002), and its influence increases when co-inoculated with other PGPR or AMF, as suggested by a 50% reduction in P supplementation (Khan et al, 2009). The principal mechanism followed by almost all phosphorus solubilizing microbes is to produce metabolites, mostly organic acids, in the form of gluconic and keto gluconic acids, which through their hydroxyl and carboxyl groups chelate the cations bound to phosphate (Bates and Lynch, 2001;Vassilev et al, 2006;Heydari et al, 2007), thereby solubilize the insoluble phosphorus into the soil solution, and make it accessible for plant uptake (Riaz et al, 2021). There is an array of phosphorus solubilizing bacteria that are capable of mobilizing forms of phosphorus, which are poorly accessible.…”

Section: Phosphorus Solubilizationmentioning

confidence: 99%

PGPR in Agriculture: A Sustainable Approach to Increasing Climate Change Resilience

Shah

Nazari

Antar

et al. 2021

Front. Sustain. Food Syst.

184

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Growing environmental concerns are potentially narrowing global yield capacity of agricultural systems. Climate change is the most significant problem the world is currently facing. To meet global food demand, food production must be doubled by 2050; over exploitation of arable lands using unsustainable techniques might resolve food demand issues, but they have negative environmental effects. Current crop production systems are a major reason for changing global climate through diminishing biodiversity, physical and chemical soil degradation, and water pollution. The over application of fertilizers and pesticides contribute to climate change through greenhouse gas emissions (GHG) and toxic soil depositions. At this crucial time, there is a pressing need to transition to more sustainable crop production practices, ones that concentrate more on promoting sustainable mechanisms, which enable crops to grow well in resource limited and environmentally challenging environments, and also develop crops with greater resource use efficiency that have optimum sustainable yields across a wider array of environmental conditions. The phytomicrobiome is considered as one of the best strategies; a better alternative for sustainable agriculture, and a viable solution to meet the twin challenges of global food security and environmental stability. Use of the phytomicrobiome, due to its sustainable and environmentally friendly mechanisms of plant growth promotion, is becoming more widespread in the agricultural industry. Therefore, in this review, we emphasize the contribution of beneficial phytomicrobiome members, particularly plant growth promoting rhizobacteria (PGPR), as a strategy to sustainable improvement of plant growth and production in the face of climate change. Also, the roles of soil dwelling microbes in stress amelioration, nutrient supply (nitrogen fixation, phosphorus solubilization), and phytohormone production along with the factors that could potentially affect their efficiency have been discussed extensively. Lastly, limitations to expansion and use of biobased techniques, for instance, the perspective of crop producers, indigenous microbial competition and regulatory approval are discussed. This review largely focusses on the importance and need of sustainable and environmentally friendly approaches such as biobased/PGPR-based techniques in our agricultural systems, especially in the context of current climate change conditions, which are almost certain to worsen in near future.

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“…Finally, biofertilizers should be selected based on their performance under field conditions with a wide range of crop varieties, diversified soil types, and environmental conditions [102]. Bioengineering, biotechnology, and multi-omics studies are time-consuming for a better understanding of PGPR commercialization [211,212].…”

Section: Industry-laboratory Research Gap For Commercial Applicationsmentioning

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) as Biofertilizers and Biopesticides

Cited by 92 publications

References 70 publications

New strains of plant growth-promoting rhizobacteria in combinations with humic acid to enhance squash growth under saline stress

New strains of plant growth-promoting rhizobacteria in combinations with humic acid to enhance squash growth under saline stress

PGPR in Agriculture: A Sustainable Approach to Increasing Climate Change Resilience

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

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