The auxin-producing Bacillus thuringiensis RZ2MS9 promotes the growth and modifies the root architecture of tomato (Solanum lycopersicum cv. Micro-Tom)

Batista, Bruna Durante; Dourado, Manuella Nóbrega; Figueredo, Everthon Fernandes; Hortencio, Renata Ockner; Marques, João Paulo Rodrigues; Piotto, Fernando Ângelo; Bonatelli, Maria Letícia; Settles, Matthew L.; Azevedo, João Lúcio de; Quecine, Maria Carolina

doi:10.1007/s00203-021-02361-z

Cited by 65 publications

(41 citation statements)

References 81 publications

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“…Pseudomonas has been reported as an excellent IAA producer genus; however, P. putida is better than P. fluorescens in terms of IAA production ( Bharucha et al, 2013 ; Kumar et al, 2015a ). Batista et al (2021) demonstrated that the genome of the Bacillus thuringiensis strain RZ2MS9 harbours the complete set of genes required for indole acetic acid production. Inoculation of tomato with B. thuringiensis strain RZ2MS9 caused 24% increase in the shoot dry weight of the Micro-Tom (MT).…”

Section: Mechanisms Of Action Of Beneficial Microbesmentioning

confidence: 99%

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Kumar

Diksha

Sindhu

et al. 2022

Current Research in Microbial Sciences

245

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Highlights Agriculture plays an important role in a country's economy. In modern intensive agricultural practices, chemical fertilizers and pesticides are applied on large scale to increase crop production in order to meet the nutritional requirements of the ever-increasing world population. However, rapid urbanization with shrinking agricultural lands, dramatic change in climatic conditions and extensive use of agrochemicals in agricultural practices has been found to cause environmental disturbances and public health hazards affecting food security and sustainability in agriculture. Besides this, agriculture soils are continuously losing their quality and physical properties as well as their chemical (imbalance of nutrients) and biological health due to indiscriminate use of agrochemicals. Plant-associated microbes with their plant growth- promoting traits have enormous potential to solve these challenges and play a crucial role in enhancing plant biomass and crop yield under greenhouse and field conditions. The beneficial mechanisms of plant growth improvement include enhanced availability of nutrients (i.e., N, P, K, Zn and S), phytohormone modulation, biocontrol of phytopathogens and amelioration of biotic and abiotic stresses. This plant-microbe interplay is indispensable for sustainable agriculture and these microbes may perform essential role as an ecological engineer to reduce the use of chemical fertilizers. Various steps involved for production of solid-based or liquid biofertilizer formulation include inoculum preparation, addition of cell protectants such as glycerol, lactose, starch, a good carrier material, proper packaging and best delivery methods. In addition, recent developments of formulation include entrapment/microencapsulation, nano-immobilization of microbial bioinoculants and biofilm-based biofertilizers. Thus, inoculation with beneficial microbes has emerged as an innovative eco-friendly technology to feed global population with available resources. This review critically examines the current state-of-art on use of microbial strains as biofertilizers in different crop systems for sustainable agriculture and in maintaining soil fertility and enhancing crop productivity. It is believed that acquisition of advanced knowledge of plant-PGPR interactions, bioengineering of microbial communities to improve the performance of biofertilizers under field conditions, will help in devising strategies for sustainable, environment-friendly and climate smart agricultural technologies to deliver short and long terms solutions for improving crop productivity to feed the world in a more sustainable manner.

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Section: Mechanisms Of Action Of Beneficial Microbesmentioning

confidence: 99%

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Kumar

Diksha

Sindhu

et al. 2022

Current Research in Microbial Sciences

245

View full text Add to dashboard Cite

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“…PG-8 has produced 2.78 µg/ml IAA in the presence of 0.1% (w/v) tryptophan, at 30 • C after 120 h (Figure 3A). Rhizospheric isolate Bacillus thuringiensis produced 0.20 µg/ml IAA with 0.1% (w/v) tryptophan after 21 h (Batista et al, 2021). Bacillus siamensis isolated from rhizospheric soil produced 5.14 µg/ml IAA with 0.1% (w/v) tryptophan after 72 h (Saleem et al, 2021).…”

Section: Indole Acetic Acid Productionmentioning

confidence: 99%

Plant Growth-Promoting Activity of Bacillus sp. PG-8 Isolated From Fermented Panchagavya and Its Effect on the Growth of Arachis hypogea

et al. 2022

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A natural bacterial isolate that shows multiple plant growth-promoting activities was isolated from fermented panchagavya (a mixture of five indigenous cow products). It is a gram-positive, endospore-forming bacteria identified as Bacillus sp. PG-8 by 16S rRNA gene sequencing. The Bacillus sp. PG-8 have shown multiple plant growth-promoting activities as indole acetic acid (2.78 μg/ml), gibberellic acid (0.7 mg/ml), ammonia (6.51 μmol/ml), exopolysaccharide (2.6% w/v) production, and phosphate solubilization (198.27 μg/ml). The Bacillus sp. PG-8 has ability to survive under the abiotic stress conditions such as temperature (28–46°C), pH (5.0–12.0), salt (0.5–20.0% w/v NaCl), and osmotic resistance (1–10% w/v PEG-6000). Due to its diverse characteristics, the effect of Bacillus sp. PG-8 was tested on Arachis hypogea (groundnut). The seeds treated with Bacillus sp. PG-8 demonstrated a 70% germination rate with seedling vigor indexes of 154. In pot study, Arachis hypogea growth showed 1.38, 1.38, 1.32, 1.39, and 1.52 times increase in root hair number, leaf numbers, leaf width, leaf length, and leaf area, respectively. The addition of Bacillus sp. PG-8 culture to the Arachis hypogea plant resulted in a significant improvement in plant growth. Bacillus sp. PG-8 is a spore producer with stress tolerance and multiple plant growth-promoting properties, which makes it a potential liquid biofertilizer candidate.

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“…The presence of genes encoding anthranilate phosphoribosyltransferase, phosphoribosylanthranilate isomerase, tryptophan synthase alpha chain, tryptophan synthase beta chain, and monoamine oxidase were detected in the BCCUSP55 draft genome, which are mostly involved in the tryptophan biosynthesis (Batista et al 2021). The IAA (indole-3-acetic acid)-producing microorganisms are known to utilize tryptophan-dependent pathway as a precursor/ intermediate of IAA production.…”

Section: Resultsmentioning

confidence: 99%

Draft genome sequence of the cyanobacterium Sphaerospermopsis aphanizomenoides BCCUSP55 from the Brazilian semiarid region reveals potential for anti-cancer applications

et al. 2021

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Sphaerospermopsis aphanizomenoides is a filamentous nitrogen-fixing and bloom-forming cyanobacterium, which biomass can fertilize natural water with nutrients, especially through nitrogen fixation. The Sphaerospermopsis aphanizomenoides strain BCCUSP55 was previously isolated from a water supply reservoir in the Brazilian semiarid region, and its draft genome assembly coupled with the gene contents are reported here. The obtained BCCUSP55 draft genome comprised 254 scaffolds with a genome size estimated of 6,096,273 bp. In addition, it has 5250 predicted coding sequences (CDS) and the G + C content is 38.5%. Further, the BCCUSP55 draft genome presented the putative nocuolin A gene complete cluster, a natural oxadiazine that triggers apoptosis in human cancer cells. Thus, our results contribute to extend the knowledge on the genus Sphaerospermopsis and reveal its biotechnological potential.

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The auxin-producing Bacillus thuringiensis RZ2MS9 promotes the growth and modifies the root architecture of tomato (Solanum lycopersicum cv. Micro-Tom)

Cited by 65 publications

References 81 publications

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Plant Growth-Promoting Activity of Bacillus sp. PG-8 Isolated From Fermented Panchagavya and Its Effect on the Growth of Arachis hypogea

Draft genome sequence of the cyanobacterium Sphaerospermopsis aphanizomenoides BCCUSP55 from the Brazilian semiarid region reveals potential for anti-cancer applications

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