Potential of native cold tolerant plant growth promoting bacilli to enhance nutrient use efficiency and yield of Amaranthus hypochondriacus

2018 ◽  
Vol 428 (1-2) ◽  
pp. 307-320 ◽  
Author(s):  
Chitra Pandey ◽  
Yogesh Kumar Negi ◽  
D. K. Maheshwari ◽  
Deepa Rawat ◽  
Deepti Prabha
Keyword(s):  
Plant Growth ◽  
Nutrient Use Efficiency ◽  
Amaranthus Hypochondriacus ◽  
Tolerant Plant ◽  
Nutrient Use ◽  
Cold Tolerant ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting

scholarly journals Effects of Selected Functional Bacteria on Maize Growth and Nutrient Use Efficiency

2020 ◽  
Vol 8 (6) ◽  
pp. 854 ◽  
Author(s):  
Amelia Tang ◽  
Ahmed Osumanu Haruna ◽  
Nik Muhamad Ab. Majid ◽  
Mohamadu Boyie Jalloh
Keyword(s):  
Plant Growth ◽  
Organic Fertilizer ◽  
Nutrient Use Efficiency ◽  
Nutrient Content ◽  
Chemical Fertilizer ◽  
Nutrient Use ◽  
Chemical Fertilization ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting

Plant growth-promoting rhizobacteria (PGPR), which include isolates from genera Paraburkholderia, Burkholderia and Serratia, have received attention due to their numerous plant growth-promoting mechanisms such as their ability to solubilize insoluble phosphates and nitrogen-fixation. However, there is a dearth of information on the potential plant growth-promoting effects of these three groups of bacteria on non-legumes such as maize. This study determined the influences of the aforementioned strains on soil properties, maize growth, nutrient uptake and nutrient use efficiency. A pot trial using maize as a test crop was done using a randomized complete block design with 7 treatments each replicated 7 times. The treatments used in this study were: Control (no fertilizer), chemical fertilizer (CF), organic-chemical fertilizers combination without inoculum (OCF) and with inocula consisting of single strains [cellulolytic bacteria (TC), organic fertilizer and chemical fertilizer with N-fixing bacteria (TN), organic fertilizer and chemical fertilizer with P-solubilizing bacteria (TP)) and three-strain inocula (TCNP), respectively. The variables measured included plant growth and nutrient content, soil nutrient content and functional rhizospheric bacterial populations. Paraburkholderia nodosa NB1 and Burkholderia cepacia PB3 showed comparable effects on maize biomass and also improved N and P use efficiencies when compared to full chemical fertilization. Nitrogen-fixing rhizobacteria had a positive effect on above-ground biomass of maize. Paraburkholderia nodosa NB1 improved soil total C and organic matter contents, besides being the only bacterial treatment that improved K use efficiency compared to OCF. The results suggest that P. nodosa NB1 and B. cepacia PB3 have potential usage in bio-fertilizers. In contrast, treatments with Serratia nematodiphila C46d and consortium strains showed poorer maize nutrient uptake and use efficiency than the other single strain treatments. Bacterial treatments generally showed comparable or higher overall N and P use efficiencies than full chemical fertilization. These findings suggest that at least half the amounts of N and P fertilizers could be reduced through the use of combined fertilization together with beneficial bacteria.

The use of plant growth-promoting rhizobacteria (PGPR) to improve root function and crop nutrient use efficiency

2021 ◽  
pp. 467-492
Author(s):  
Melissa M. Larrabee ◽  
◽  
Louise M. Nelson ◽  
Keyword(s):  
Plant Growth ◽  
Root Function ◽  
Nutrient Use Efficiency ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Tolerance ◽  
Beneficial Effects ◽  
Nutrient Use ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting

Bacteria that colonize plant roots and promote plant growth and development, plant growth-promoting rhizobacteria (PGPR) can contribute to more sustainable intensification of agriculture while minimizing detrimental impacts associated with excessive fertilization. In this chapter we review recent research on the use of PGPR as biofertilizers to enhance root function and improve nutrient uptake. PGPR alter root architecture, root metabolism, nutrient use efficiency and enhance plant tolerance to abiotic stresses such as salinity and drought by a variety of mechanisms that are not yet well understood. Beneficial effects observed in the laboratory are not always seen consistently in the field due to varying environment and complex biotic interactions, limiting the widespread application of PGPR in agriculture. We highlight new research approaches that will facilitate our understanding of this complex community at the molecular level and from a holistic perspective. Applied research to facilitate registration and commercialization of biofertilizers is also considered.

scholarly journals Isolation, Screening, and Characterization of Plant-Growth-Promoting Bacteria from Durum Wheat Rhizosphere to Improve N and P Nutrient Use Efficiency

2019 ◽  
Vol 7 (11) ◽  
pp. 541 ◽  
Author(s):  
Nilde Antonella Di Benedetto ◽  
Daniela Campaniello ◽  
Antonio Bevilacqua ◽  
Mariagrazia Pia Cataldi ◽  
Milena Sinigaglia ◽  
...  
Keyword(s):  
Plant Growth ◽  
Durum Wheat ◽  
Nutrient Use Efficiency ◽  
Plant Growth Promoting Bacteria ◽  
Nutrient Use ◽  
Preliminary Validation ◽  
Rdna Sequencing ◽  
Ammonium Production ◽  
Plant Growth Promoting ◽  
Growth Promoting

The main goal of this paper was to select promising microorganisms which could potentially act as plant-growth-promoting bacteria (PGPB) for durum wheat of Foggia County. At this scope, a new statistical framework, based on multivariate analyses and the evaluation of the statistical distribution of each trait, was used. Four hundred and seventy-four isolates were isolated from the rhizosphere of durum wheat in Foggia County and preliminarily screened as a function of four target indices (ammonium production, siderophores production, P-solubilization, and nitrification). After this step, the number of strains was reduced and the remaining isolates were tested through a quantitative approach, to assess the production of IAA (indole acetic acid), P-mineralization, and nitrification. In this second step, the cut-off was based on the whole population trend by evaluating for each trait the medians and quartiles. As a result, 16 promising isolates were selected and identified by 16S rDNA sequencing (Bacillus, Pseudomonas, Stenotrophomonas, and Lysinibacillus). The last step of this research was a preliminary validation in a growth chamber on eight strains. As screening and simple indices, two quantitative measures were chosen. The main result was the selection of at least three isolates (6P, 20P, and 25A) for a future field validation. They increased biomass and height by respectively 50% and 25%.

scholarly journals Bitki Büyümesinde ve Gelişiminde Bitki Büyümesini Teşvik Eden Rizobakterinin (PGPR) Rolü: Toprak-Bitki İlişkisi

2020 ◽  
Vol 8 (12) ◽  
pp. 2590-2602
Author(s):  
Nuriye Meraklı ◽  
Abdulrezzak Memon
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Chemical Engineering ◽  
Nutrient Use Efficiency ◽  
Plant Growth Promoting Rhizobacteria ◽  
Iron Nutrition ◽  
Nutrient Use ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Root Growth And Development

Plant growth-promoting rhizobacteria (PGPR) is a beneficial group of free-living soil bacteria that colonize the rhizosphere and are helpful in root growth and development. PGPR plays an important role in plant growth through the production of phytohormones, solubilization of inorganic phosphate, increased iron nutrition via iron-chelating siderophores and volatile compounds that affect the plant metabolism and signalling pathways. Additionally, PGPR shows synergistic and antagonistic interactions with rhizosphere microorganisms and soil which indirectly improve and enhance plant growth rate. Various environmental factors affect the PGPR growth and proliferation in the plants. There are several shortcomings and limitation in the PGPR research which can be addressed through the use of modern approaches and techniques by exploring multidisciplinary research which combines applications in microbiology, biotechnology, nanotechnology, agro-biotechnology, and chemical engineering. Furthermore, PGPR is also known to reduce the emission of greenhouse gases (GHGs), carbon footprint, and also increase the nutrient-use efficiency. Here we describe the importance of PGPR in sustainable agriculture and their role in plant growth and development.

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