Azotobacter: PGPR Activities with Special Reference to Effect of Pesticides and Biodegradation

Chennappa, G.; Naik, M. K.; Sreenivasa, M. Y.

doi:10.1007/978-81-322-2647-5_13

Cited by 33 publications

(23 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The majority of the fertilizer-derived phosphorus is retained in the solid phase of the soil as precipitates with aluminum, iron, calcium, and organic matter or is adsorbed on the surface of clay particles, which makes it unavailable for plant uptake (Hinsinger, 2001;Novais et al, 2007;Gurikar et al, 2016). The use of natural sources of phosphate fertilizers is limited by the low ion-exchange capacity of the acidic tropical soils (Edwards et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…PSB can solubilize phosphorus from organic and inorganic sources by the action of organic acids and extracellular enzymes that are secreted into the soil (Chen et al, 2006;Park et al, 2011;Baliah et al, 2016;Gurikar et al, 2016). PSB releases low molecular weight organic acids, which solubilizes mineral phosphates and reduces the pH of soil (Goldstein, 1986;Whitelaw, 2000;Pérez et al, 2007;Gomes et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Maize endophytic bacteria as mineral phosphate solubilizers

et al. 2017

View full text Add to dashboard Cite

ABSTRACT. In the present study, we demonstrated the in vitro activity of endophytic phosphate-solubilizing bacteria (PSB). Fifty-five endophytic PSB that were isolated from sap, leaves, and roots of maize were tested for their ability to solubilize tricalcium phosphate and produce organic acid. Partial sequencing of the 16S rRNA-encoding gene showed that the isolates were from the genus Bacillus and different species of Enterobacteriaceae. The phosphate solubilization index on solid medium and phosphate solubilization in liquid medium varied significantly among the isolates. There was a statistically significant difference (P ≤ 0.05) for both, the values of phosphatesolubilizing activity and pH of the growth medium, among the isolates. Pearson correlation was statistically significant (P ≤ 0.05) between P-solubilization and pH (R = -0.38), and between the gluconic acid production and the lowering of the pH of the liquid medium at 6 (R = 0.28) and 9 days (R = 0.39). Gluconic acid production was prevalent in all the PSB studied, and Bacillus species were most efficient in solubilizing phosphate. This is the first report on the characterization of bacterial endophytes from maize and their use as potential biofertilizers. In addition, this may provide an alternative strategy for improving the phosphorus acquisition efficiency of crop plants in tropical soils.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maize endophytic bacteria as mineral phosphate solubilizers

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The sequence, which was not significantly differentiated from the treatment of mixing K 2 HPO 4 with A. chroococcum and biochar with pathogenic fungi, was 20.26 and 5.00 g / plant respectively, followed by the remaining other treatments (Figure 1). The reason for the efficiency of A. chroococcum bacteria in reducing the percentage of infection and severity of the pathogen may be due to its direct effect on plants by fixing atmospheric nitrogen and increasing the availability of phosphorous as well as the production of hydrogen cyanide (HCN) and vitamins (Gurikar et al, 2016).…”

Section: Evaluation Of the Efficiency Of Some Biological And Chemicalmentioning

confidence: 99%

Induction of Systemic Resistance in Soybean Using Some Eco-Friendly Materials Against Infection of F. Solani and Its Effect on Germination and Biochemical characteristics

AL-Mayahi¹,

Hassan²

2021

PLANT ARCHIVES

View full text Add to dashboard Cite

This study was conducted to evaluate the efficacy of some chemical and biological substances, individually or in combination in reducing fusarium root rot disease in soybeans caused by the fungus Fusarium solani. The results of laboratory evaluation showed that A. chroococcum bacteria achieved 58.90% inhibition by using dilution 10 -7 . Whereas, the biochar scored 100% inhibition rate at a concentration 4%, while the potassium phosphate (K 2 HPO 4 ) scored a complete and 100% inhibition of the growth of the fungus at of 200 mM concentration. At greenhouse conditions, the mixing treatment A .chroococcum with biochar was performed in the presence of pathogenic fungi, and treatment of K 2 HPO 4 with A.chroococcum and biochar with pathogenic fungi, was the most efficient in reducing the incidence and severity of infection with F. solani which was 0.00 and 0.00% respectively, which did not differ significantly from the treatment of K 2 HPO 4 with A.chroococcum with pathogenic fungi, which was 6.67 and 3.33% respectively, compared to the percentage and severity of infection in the control treatment with, 76.67 and 75.00% respectively, as well as their cause of The fresh and dry weight of the plant was significantly increased among their treatments. The factors also showed an efficiency in inducing systemic resistance by increasing the peroxidase enzyme activity 7 and 14 days of adding the pathogen, compared to the treatment (without pathogenic fungi. The two mixing treatments between K 2 HPO 4 with A .chroococcum and biochar with pathogenic fungi and the addition treatment of mixing A .chroococcum with biochar in the presence of the pathogen were 64.00, 70.00, 63.17 and 68.37 respectively the rate of change in photosynthesis / min / g fresh weight of plant leaves. The rate of change of plant leaves was successively, while the rate of change of the enzyme was achieved by the comparison treatment (without pathogenic fungi), which was 22.27 and 23.33 rate of change by photosynthesis / min / gm fresh weight of plant leaves respectively, followed by the remaining treatments.

show abstract

“…detoxi ed pesticides and enhanced legume production under adverse conditions (Alori et al, 2017). Likewise, pesticide-tolerant free-living PGPR such as Bacillus (Roy et al, 2018), Azotobacter (Gurikar et al, 2016) and Stenotrophomonas (Jaiswal et al, 2019) circumvented the toxicity of pesticides and concurrently improved growth of legumes.…”

Section: Introductionmentioning

confidence: 99%

Mesorhizobium Ciceri as a Biological Tool for Improving Physiological, Biochemical and Antioxidant State of Cicer Aritienum L. by Lowering the Fungicide Induced Oxidative Stress

Shahid¹,

Khan²

2020

Preprint

View full text Add to dashboard Cite

The present study demonstrates the interactions of fungicide-tolerant symbiotic bacteria Mesorhizobium ciceri with Cicer arietinum-kitazin (KITZ) in greenhouse conditions. Under both in vitro and soil systems, KITZ imparted deleterious impacts on plants as a function of dose. The three-time KITZ dose detrimentally and maximally reduced germination efficiency, vigor index, dry matter production, symbiosis, leaf pigments and seed attributes of C. arietinum. KITZ- induced morphological alterations in root tips, oxidative damage and cell death in root cells of C. arietinum were shown by SEM. M. ciceri tolerated up to 2400 µgmL− 1 of KITZ, synthesized considerable amounts of bioactive molecules including indole-3-acetic-acid (IAA), 1-aminocyclopropane 1-carboxylate (ACC) deaminase, siderophores, exopolysaccharides (EPS), HCN and ammonia, and solubilised inorganic phosphate even in fungicide-stressed media. Following application to soil, M. ciceri improved performance of C. arietinum and enhanced dry biomass production, yield, symbiosis and leaf pigments even in a fungicide-polluted environment. At 92 µgKITZkg− 1 soil, M. ciceri maximally and significantly (p ≤ 0.05) augmented whole plant length by 41%, total dry biomass by 18%, carotenoid content by 9%, LHb content by 21%, root N by 9%, shoot P by 11% and pod yield by 15%. Additionally, M. ciceri was associated with decreased levels of stressor molecules (proline and MDA) and antioxidant defence enzymes (APX, GPX, CAT and POD) of C. arietinum plants when inoculated in soil. The symbiotic strain effectively colonized the plant rhizosphere/rhizoplane. In pesticide- contaminated soils, inoculation of M. ciceri may serve as an excellent strategy for augmenting C. arietinum productivity.

show abstract

Azotobacter: PGPR Activities with Special Reference to Effect of Pesticides and Biodegradation

Cited by 33 publications

References 41 publications

Maize endophytic bacteria as mineral phosphate solubilizers

Maize endophytic bacteria as mineral phosphate solubilizers

Induction of Systemic Resistance in Soybean Using Some Eco-Friendly Materials Against Infection of F. Solani and Its Effect on Germination and Biochemical characteristics

Mesorhizobium Ciceri as a Biological Tool for Improving Physiological, Biochemical and Antioxidant State of Cicer Aritienum L. by Lowering the Fungicide Induced Oxidative Stress

Contact Info

Product

Resources

About