Improvement of Crop Protection and Yield in Hostile Agroecological Conditions with PGPR-Based Biofertilizer Formulations

Egamberdieva, Dilfuza; Adesemoye, Anthony O.

doi:10.1007/978-81-322-2779-3_11

Cited by 19 publications

(19 citation statements)

References 66 publications

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“…Previous studies have shown the positive effects of PGPR on plant productivity, particularly under stress conditions, suggesting their potential role in a climate change scenario where extreme events, such as floods and droughts, occur with greater frequency in cultivated land (Egamberdieva and Adesemoye, 2016). However, little is so far known of their effects on the quality of cereal grains.…”

Section: Introductionmentioning

confidence: 99%

Effects of Seed-Applied Biofertilizers on Rhizosphere Biodiversity and Growth of Common Wheat (Triticum aestivum L.) in the Field

et al. 2020

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In order to reduce chemical fertilization and improve the sustainability of common wheat (Triticum aestivum L.) cultivation, maintaining at the same time high production and quality standards, this study investigated the effects of three commercial biofertilizers on rhizosphere bacterial biomass, biodiversity and enzymatic activity, and on plant growth and grain yield in a field trial. The wheat seeds were inoculated with the following aiding microrganisms: (i) a bacterial consortium (Azospirillum spp. + Azoarcus spp. + Azorhizobium spp.); and two mycorrhizal fungal-bacterial consortia, viz. (ii) Rhizophagus irregularis + Azotobacter vinelandii, and (iii) R. irregularis + Bacillus megaterium + Frateuria aurantia, and comparisons were made with noninoculated controls. We demonstrate that all the biofertilizers significantly enhanced plant growth and nitrogen accumulation during stem elongation and heading, but this was translated into only small grain yield gains (+1%-4% vs controls). The total gluten content of the flour was not affected, but in general biofertilization significantly upregulated two high-quality protein subunits, i.e., the 81 kDa high-molecular-weight glutenin subunit and the 43.6 kDa low-molecular-weight glutenin subunit. These effects were associated with increases in the rhizosphere microbial biomass and the activity of enzymes such as b-glucosidase, a-mannosidase, bmannosidase, and xylosidase, which are involved in organic matter decomposition, particularly when Rhizophagus irregularis was included as inoculant. No changes in microbial biodiversity were observed. Our results suggest that seed-applied biofertilizers may be effectively exploited in sustainable wheat cultivation without altering the biodiversity of the resident microbiome, but attention should be paid to the composition of the microbial consortia in order to maximize their benefits in crop cultivation.

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Section: Introductionmentioning

confidence: 99%

Effects of Seed-Applied Biofertilizers on Rhizosphere Biodiversity and Growth of Common Wheat (Triticum aestivum L.) in the Field

et al. 2020

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“…Some beneficial soil microorganisms can help plants overcome problems caused by abiotic stress (Bardi & Malusà, ; Bhardwaj, Ansari, Sahoo, & Tuteja, ; Egamberdieva & Adesemoye, ; Vassilev et al., ). The exploitation of plant beneficial microbes, such as plant growth‐promoting rhizobacteria (PGPR) and arbuscular mycorrhizal (AM) fungi for drought stress mitigation in plants, is gaining importance (Li et al., ; Nadeem, Ahmad, Zahir, Javaid, & Ashraf, ; Vurukonda et al., ).…”

Section: Introductionmentioning

confidence: 99%

Growth and nutrition of cowpea (Vigna unguiculata) under water deficit as influenced by microbial inoculation via seed coating

Rocha

Vosátka

et al. 2019

J Agronomy Crop Science

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Drought can drastically reduce cowpea [Vigna unguiculata (L.) Walp.] biomass and grain yield. The application of plant growth‐promoting rhizobacteria and arbuscular mycorrhizal fungi can confer resistance to plants and reduce the effects of environmental stresses, including drought. Seed coating is a technique which allows the application of minor amounts of microbial inocula. Main effects of the factors inoculation and water regime showed that: severe or moderate water deficit had a general negative impact on cowpea plants; total biomass production, seed weight and seed yield were enhanced in plants inoculated with P. putida; inoculation of R. irregularis significantly increased nitrogen (N) and phosphorus (P) shoot concentrations; and R. irregularis enhanced both chlorophyll b and carotenoids contents, particularly under severe water deficit. Plants inoculated with P. putida + R. irregularis had an increase in shoot P concentration of 85% and 57%, under moderate and severe water deficit, respectively. Singly inoculated P. putida improved potassium shoot concentration by 25% under moderate water deficit. Overall, in terms of agricultural productivity the inoculation of P. putida under water deficit might be promising. Seed coating has the potential to be used as a large‐scale delivery system of beneficial microbial inoculants.

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“…Biochar facilitated the growth and survival of the bacterial strains by supplying adequate levels of dissolved carbon and nitrogen. Although other carriers maintained large populations of the three bacterial strains, similar to those obtained with biochar, peatmos-biochar and sawdust-biochar, they were not deemed suitable carriers because they constituted a poor nutrient supply for these bacterial strains growth; thus, they had less of an impact on disease control (Egamberdieva and Adesemoye, 2016).…”

Section: Chitinase Activitymentioning

confidence: 99%

“…have been used to reduce disease caused by a variety of soilborne pathogens (Ben Abdallah et al, 2016;Bahroun et al, 2018 andHassan et al, 2018). However, the success of biocontrol agent application largely depends on the carrier materials, which used for the bacterial inoculants protect them from various stress factors and prolong shelf life in arid soils (Egamberdieva and Adesemoye, 2016). An ideal carrier that can support the survival of a biocontrol agent, while discouraging the growth of the target pathogen (Wei et al, 2015).…”

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confidence: 99%

Performance of Some New Bioformulations Against Tomato Fusarium Wilt

El-Hadidy

2019

Egyptian Journal of Desert Research

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hizobacteria strains of Bacillus pseudomycoides M3, Brevibacillus brevis M4 and Stenotrophomonas maltophilia BG4 were assayed for its antifungal activity against Fusarium oxysporum f. sp. lycopersici; a phytopathogenic fungus causing wilt in tomato and evaluated to formulate carrierbased bioformulations. The viability of these bacterial strains was monitored at different time intervals during the period of storage at room temperature in different carriers; such as peatmos, sawdust, biochar, peatmos-biochar, sawdust-biochar and kaolin. Biochar was found to be the most efficient carrier material for the three bacterial strains, followed by other carriers. Tomato seeds were coated with different carrier-based bioformulations experiments were carried out to access its effects against wilt disease. Biochar-based bioformulations showed higher colonies forming unit counts and maximum viability for bacterial strains at 180 days of storage. Minimum percentage of disease incidence and severity were observed in biochar inoculated with mixture of three bacterial strains. Maximum increase in plant growth parameters (plant height, dry and fresh weight) were ascertained amongst all bioformulations from field experiment, biochar inoculated with bacterial strains performed consistently thriving results for tomato yield. Furthermore, seed treatment with bacterial formulation induced plants to synthesize defense enzymes; such as peroxidase and chitinase, whereas an additional increase in the synthesis was observed in biochar followed by peatmos-biochar pretreated plants challenge inoculated with Fusarium oxysporum f. sp. lycopersici.

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Improvement of Crop Protection and Yield in Hostile Agroecological Conditions with PGPR-Based Biofertilizer Formulations

Cited by 19 publications

References 66 publications

Effects of Seed-Applied Biofertilizers on Rhizosphere Biodiversity and Growth of Common Wheat (Triticum aestivum L.) in the Field

Effects of Seed-Applied Biofertilizers on Rhizosphere Biodiversity and Growth of Common Wheat (Triticum aestivum L.) in the Field

Growth and nutrition of cowpea (Vigna unguiculata) under water deficit as influenced by microbial inoculation via seed coating

Performance of Some New Bioformulations Against Tomato Fusarium Wilt

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