Rhizobacteria as potential bio-inoculants and biocontrol agents to promote black pepper plant cultivation
In this study, isolated seven indigenous rhizobacteria antagonistic to soil-borne Fusarium solani, the causal fungus of slow decline, the most serious debilitating disease of black pepper. Isolated bacteria Bacillus subtilis, Bacillus siamensis, Brevibacillus gelatini, Pseudomonas geniculata, Pseudomonas beteli, Burkholderia ubonensis and Burkholderia territorii and these bacteria were effective in production of antifungal
Use of microalga Asterarcys quadricellulare effectively has a potential source for biofertilizers
Investigate the use of microalga Asterarcys quadricellulare (CCAP 294/1) biomass to grow potato. Two biomass concentrations (0.15 and 0.25 g L−1) and two spray frequencies (weekly and biweekly) of microalga-biomass sprays increased potato yield and triggered biochemical changes that improve chlorophyll, amino acid, sugar, and nitrate reductase enzyme activity. These findings demonstrate that A. quadricellulare effectively stimulates plant growth, development, and nitrogen assimilation, indicating it is a potential source of sustainable input for potato production.
Bioprospecting of endophytic bacteria and their role in plant growth promotion
A total of 67 putative endophytic bacteria were isolated using different nutrient growth media from three diverse maize genotypes. Out of the 67, 10 endophytic bacterial isolates were selected for further characterization on the basis of plant growth-promoting (PGP) attributes. Phosphorus (P) and potassium (K) solubilization was observed in about 25% of the bacterial isolates. Additionally, bacterial endophytes’ ability to undergo mechanisms like nitrogenase activity, production of indole acetic acids, and siderophores was also studied. Among the 10 selected bacterial strains, three efficient endophytic PGP strains EU-A2SK1, EU-M4ARAct,
Rhizosphere bacteria help in enhance the tomato plants growth
The inoculation of beneficial bacteria is known to enhance plant growth under these stresses, such as phosphorus starvation or salt stress. The efficiency of selected beneficial bacterial strains in improving tomato plant growth to better cope with double stresses in salty and P-deficient soil conditions. Six strains of Arthrobacter and Bacillus with different reservoirs of plant growth-promoting traits were tested in vitro for their abilities to tolerate 2–16% (w/v) NaCl concentrations, and shown to retain their motility and phosphate-solubilizing capacity under salt stress conditions.
Work has begun to replace plastics (polymers derived from crude oil) with sustainable biopolymers. Poultry feathers represent one possible feedstock material for biopolymer development, however the understanding of their thermal processing and melt formation remains in its infancy. Moreover, transitioning from lab scale to industrial scale remains a significant challenge. This paper aims to carry
Converting organic waste in to value-added products using microbial consortia
With a focus on the bioconversion of organic waste into value-added products, municipal vegetable waste was fractionated into liquid and solid part. The solid fraction was subjected to biodegradation in the presence of different microbial consortia and different enzymes were extracted. The remaining solid stuff was converted into animal feed, followed by the evaluation of its microbiological
Growth stimulation of mustard by Pseudomonas species
Various plant growth-promoting activities, i.e., production of aminolevulinic acid, indole acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, and solubilization of potassium and phosphorus, were analyzed in isolated salt-tolerant rhizobacterial strains, which may contribute towards salt tolerance and crop productivity in mustard. Rhizobacterial inoculation revealed 139 to 291% increase in root and shoot dry weight even after 80 days of sowing. The results indicated that application of two
Stimulation effects of foliar applied glycine and glutamine amino acids on lettuce growth.
In this study, the growth and nutrient uptake of Romain lettuce (Lactuca sativa subvar Sahara) were evaluated under spray of glycine or glutamine at different concentrations of 0 (as control), 250, 500 and 1000 mg.L-1, as well as a treatment of 250 mg.L-1 glycine+250 mg.L-1 glutamine. The results showed that there was significant increase in leaf total chlorophyll content under Gly250+Glu250, Gly250 and Glu1000 mg.L-1treatments, and in leaf carotenoids content under 250 mg.L-1 glutamine spray compared with the control plants. Shoot fresh and dry weights were
In situ degradation of biodegradable plastic mulch films in compost and agricultural soils
In this study quantified the degradation of biodegradable plastic mulches in compost and in soil at warm and cool climates (Tennessee and Washington). Mulch degradation was assessed by Fourier transformed infrared (FTIR) spectroscopy, molecular weight analysis, thermo gravimetric analysis (TGA), nuclear-magnetic resonance (NMR), and mulch surface-area quantification. Biodegradable plastic mulches degraded faster in compost than in soil: degradation, as assessed by surface-area reduction, in compost ranged from 85 to 99% after 18 weeks, and in
