Bacillus as Plant Growth Promoting Rhizobacteria (PGPR): A Promising Green Agriculture Technology

Kashyap, Brijendra Kumar; Solanki, Manoj Kumar; Pandey, Anand Kumar; Prabha, S.; Kumar, Pramod; Kumari, Baby

doi:10.1007/978-981-13-6040-4_11

Cited by 79 publications

(39 citation statements)

References 55 publications

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“…Additionally, Bacillus also possesses several other pre-requisite PGP characteristics which includes their tendency to replicate at a faster rate, ability to colonise the roots rapidly and their competitive colonisation potential 53 . They promote the growth of plants by the production of various phytohormone precursors such as indole acetic acid, cytokinins, gibberellins and ethylene, conversion of complex nutrients like phosphorous and nitrogen in to simple forms, synthesis of siderophores, production of secondary metabolites and antifungal compounds 54 , 55 .…”

Section: Discussionmentioning

confidence: 99%

“…Siderophore producing bacteria like Bacillus from the rhizosphere of Piper nigrum L. has been reported to have PGP activity on shallot bulbs and seeds of mustard 57 . Phosphate solubilizing bacteria helps in the uptake of phosphorous from soil and promotes plant growth 55 . Protease has been reported as a hydrolase which along with chitinase and β-1,3-glucanase causes fungal cell wall lysis, hence resulting in the disease control 8 .…”

Section: Discussionmentioning

confidence: 99%

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Field evaluation of PGP Bacillus sp. strain D5 native to Crocus sativus, in traditional and non traditional areas, and mining of PGP genes from its genome

Magotra

Bhagat

Ambardar

et al. 2021

Sci Rep

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Native Bacillus sp. strain D5 coded as (Bar D5) has been isolated from the saffron corm that showed plant growth promotion (PGP) properties and also inhibits the growth of corm rot causing Fusarium oxysporum R1 (Fox R1) in-vitro. Bar D5 was more efficient PGP bacterium in comparison to earlier reported native bio-formulations by our group. Pot assays and field evaluation of Bar D5 confirmed its in-vivo efficacy for PGP traits and biocontrol activity as well. Pot trials were followed by field trials at traditional (Kishtwar) and non-traditional (R.S Pura) saffron cultivation areas in Jammu and Kashmir. At both places, Bar D5 bio-formulation treatment led to the increase in root number & length, shoot number & length, flower number and number & weight of daughter corms. Additionally, it also decreased the corm rot disease incidence significantly. Priming of corms with bio-formulation resulted in the reduction of pathogenic fungal load by three fold at the depth of corm sowing from ground level. The shelf life/viability of Bar D5 based bio-formulation was found to be 52% (viable spores) for one year at room temperature. Draft genome sequence of Bar D5 revealed the presence of genes necessary for PGP and biocontrol activity. Further, confirmation of gene sequences and annotation was done by amplification, re-sequencing and mapping of PGP and biocontrol genes on draft genome. Bar D5 based bio-formulation can be provided to companies/researchers interested in saffron cultivation or bio-formulation production for commercial exploitation, since saffron is grown as revenue crop across continents. The present study bridges the gap between genomics and its field application.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Field evaluation of PGP Bacillus sp. strain D5 native to Crocus sativus, in traditional and non traditional areas, and mining of PGP genes from its genome

Magotra

Bhagat

Ambardar

et al. 2021

Sci Rep

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“…In the agricultural sector, the biocontrol strategy has received great attention because it provides safe, environmentally friendly, long-lasting, and inexpensive alternatives [ 46 ]. The characterizations of the bacterial strains from the OG Ba as biocontrol agents were determined based on their abilities to improve plant growth and health [ 47 ].…”

Section: The Importance and Applications Of The Og Bamentioning

confidence: 99%

A Review on the Biotechnological Applications of the Operational Group Bacillus amyloliquefaciens

et al. 2021

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Bacteria under the operational group Bacillus amyloliquefaciens (OGBa) are all Gram-positive, endospore-forming, and rod-shaped. Taxonomically, the OGBa belongs to the Bacillus subtilis species complex, family Bacillaceae, class Bacilli, and phylum Firmicutes. To date, the OGBa comprises four bacterial species: Bacillus amyloliquefaciens, Bacillus siamensis, Bacillus velezensis and Bacillus nakamurai. They are widely distributed in various niches including soil, plants, food, and water. A resurgence in genome mining has caused an increased focus on the biotechnological applications of bacterial species belonging to the OGBa. The members of OGBa are known as plant growth-promoting bacteria (PGPB) due to their abilities to fix nitrogen, solubilize phosphate, and produce siderophore and phytohormones, as well as antimicrobial compounds. Moreover, they are also reported to produce various enzymes including α-amylase, protease, lipase, cellulase, xylanase, pectinase, aminotransferase, barnase, peroxidase, and laccase. Antimicrobial compounds that able to inhibit the growth of pathogens including non-ribosomal peptides and polyketides are also produced by these bacteria. Within the OGBa, various B. velezensis strains are promising for use as probiotics for animals and fishes. Genome mining has revealed the potential applications of members of OGBa for removing organophosphorus (OPs) pesticides. Thus, this review focused on the applicability of members of OGBa as plant growth promoters, biocontrol agents, probiotics, bioremediation agents, as well as producers of commercial enzymes and antibiotics. Here, the bioformulations and commercial products available based on these bacteria are also highlighted. This review will better facilitate understandings of members of OGBa and their biotechnological applications.

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“…Plant growth‐promoting bacteria (PGPB) have been found mostly associated with plant tissues or the rhizosphere and can help plants to absorb and utilize the mineral and water (Kashyap et al ). Their major functions include nitrogen fixation, carbon cycling, phosphorus solubilization, iron chelation, secretion of plant hormones, and inhibition of disease‐causing pathogens (Lugtenberg and Kamilova ).…”

Section: Introductionmentioning

confidence: 99%

Diversity of sugarcane root‐associated endophytic Bacillus and their activities in enhancing plant growth

Wang

Solanki

et al. 2019

J Appl Microbiol

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Aims Plant tissues are the reservoirs of beneficial and harmful microbes that regulates plant growth. In the present study, we investigated the diversity, function and colonization of sugarcane roots associated with Bacillus spp. Methods and Results A total of 20 Bacillus strains were isolated and identified by 16S rRNA gene sequencing, and their genetic diversity was examined by BOX, ERIC, REP, (GTG)5 PCR techniques. Among all Bacillus isolates, 65% showed indole acetic acid‐like compounds production, 50% solubilized phosphorus and 25% of the isolates were able to secrete siderophore. Moreover, all 20 Bacillus isolates showed antifungal activity against eight fungal pathogens and 11 of them (55%) antagonized tomato grey mold. Based on the plant growth‐promoting traits and antifungal potential, isolate Y8 was selected for root and plant tissue colonization assays and a greenhouse‐level sugarcane growth promotion study. Fluorescence microscopy results confirmed that isolate Y8 has a strong ability to colonize in the sugarcane root and leaves, and the root surface association of Y8 was confirmed by scanning electron microscopy. Furthermore, greenhouse experimental results demonstrated that Y8 has a significant effect on enhancing sugarcane biomass and root length. Conclusions Endophytic Bacillus strains have growth‐promoting properties and anti‐fungal ability that can enhance plant fitness in an eco‐friendly manner. Significance and Impact of the Study Endophytic Bacillus strains would be a potential alternative to chemical fertilizer as well as a biocontrol agent in the future.

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Bacillus as Plant Growth Promoting Rhizobacteria (PGPR): A Promising Green Agriculture Technology

Cited by 79 publications

References 55 publications

Field evaluation of PGP Bacillus sp. strain D5 native to Crocus sativus, in traditional and non traditional areas, and mining of PGP genes from its genome

Field evaluation of PGP Bacillus sp. strain D5 native to Crocus sativus, in traditional and non traditional areas, and mining of PGP genes from its genome

A Review on the Biotechnological Applications of the Operational Group Bacillus amyloliquefaciens

Diversity of sugarcane root‐associated endophytic Bacillus and their activities in enhancing plant growth

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