Nutrient uptake and nutrient use efficiency as influenced by application of plant growth promoting rhizobacteria, Rhizobium, and phosphorus in lentil (Lens culinaris Medikus)

AGROCHIMICA ◽  
2019 ◽  
pp. 275-290
Author(s):  
N. Singh ◽  
G. Singh ◽  
R.K. Gupta
Keyword(s):  
Plant Growth ◽  
Nutrient Uptake ◽  
Lens Culinaris ◽  
Nutrient Use Efficiency ◽  
Plant Growth Promoting Rhizobacteria ◽  
Nutrient Use ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting

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 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.

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.

scholarly journals Agronomic Biofortification of Cayenne Pepper Cultivars with Plant Growth-Promoting Rhizobacteria and Chili Residue in a Chinese Solar Greenhouse

2021 ◽  
Vol 9 (11) ◽  
pp. 2398
Author(s):  
Ibraheem Olamide Olasupo ◽  
Qiuju Liang ◽  
Chunyi Zhang ◽  
Md Shariful Islam ◽  
Yansu Li ◽  
...  
Keyword(s):  
Plant Growth ◽  
Water Use Efficiency ◽  
Water Use ◽  
Bacillus Amyloliquefaciens ◽  
Net Photosynthesis ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting ◽  
Agronomic Biofortification

Agronomic biofortification of horticultural crops using plant growth-promoting rhizobacteria (PGPR) under crop residue incorporation systems remains largely underexploited. Bacillus subtilis (B1), Bacillus laterosporus (B2), or Bacillus amyloliquefaciens (B3) was inoculated on soil containing chili residue, while chili residue without PGPR (NP) served as the control. Two hybrid long cayenne peppers, succeeding a leaf mustard crop were used in the intensive cultivation study. Net photosynthesis, leaf stomatal conductance, transpiration rate, photosynthetic water use efficiency, shoot and root biomass, and fruit yield were evaluated. Derivatives of folate, minerals, and nitrate contents in the pepper fruits were also assessed. B1 elicited higher net photosynthesis and photosynthetic water use efficiency, while B2 and B3 had higher transpiration rates than B1 and NP. B1 and B3 resulted in 27–36% increase in pepper fruit yield compared to other treatments, whereas B3 produced 24–27.5% and 21.9–27.2% higher 5-methyltetrahydrofolate and total folate contents, respectively, compared to B1 and NP. However, chili residue without PGPR inoculation improved fruit calcium, magnesium, and potassium contents than the inoculated treatments. ‘Xin Xian La 8 F1’ cultivar had higher yield and plant biomass, fruit potassium, total soluble solids, and total folate contents compared to ‘La Gao F1.’ Agronomic biofortification through the synergy of Bacillus amyloliquefaciens and chili residue produced better yield and folate contents with a trade-off in the mineral contents of the greenhouse-grown long cayenne pepper.

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