Amazing Multiple Function Properties of Plant Growth Promoting Rhizobacteria in the Rhizosphere Soil

Sureshbabu, K.; Amaresan, N.; Kumar, K.

doi:10.20546/ijcmas.2016.502.074

Cited by 58 publications

(22 citation statements)

References 66 publications

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“…Phytohormones are organic substances that can promote, inhibit, or modify the growth and development of plants at low concentrations (Damam, Kaloori, Gaddam, & Kausar, ). Phytohormones promote root cell proliferation by overproducing lateral roots and root hairs with a concomitant increase in nutrient and water uptake (Sureshbabu, Amaresan, & Kumar, ). The results of the present study show that increased root and shoot dry matter and tiller number and diameter could be due to the phytohormones produced by these bacteria.…”

Section: Discussionmentioning

confidence: 99%

Sugarcane growth and nutrition levels are differentially affected by the application of PGPR and cane waste

Santos

Kandasamy²,

Rigobelo

2018

MicrobiologyOpen

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Mineral and organic fertilization can be optimized by using rhizobacteria which increases dry matter, yield, and nutrients in the soil and plant, among the other biological inputs. However, the discovery of single microbes or a consortium that can benefit plants has been a challenge. In this context, this study aimed to evaluate the effects of Bacillus subtilis and Bacillus pumilus combined with mineral fertilization and sugar and alcohol industry by-products in presprouted and the initial growth phase of sugar cane seedlings. The study was carried out in two phases. Phase 1 included presprouted seedlings with T1 = untreated control, T2 = B. subtilis, T3 = B. pumilus, and T4 = B. subtilis + B. pumilus treatments. Phase 2 included the same treatments with four types of fertilization: F1 = mineral fertilization, F2 = mineral fertilization + vinasse, F3 = mineral fertilization + filter cake, and F4 = mineral fertilization + filter cake compost. Of the phase 1 treatments, T2 (B. subtilis) was the best promoter of root growth and the total dry matter compared to the control with an increase of 23.0% compared to the control. In phase 2, B. pumilus application, increased the total dry matter by 13%, the number of tillers by 37%, and the diameter of the tillers by 48% when combined with mineral fertilization. The combined application of B. subtilis and B. pumilus increased the phosphorus content by 13% in soil treated with mineral fertilization and filter cake compost. The results of the this study strongly suggest that the use of B. subtilis and B. pumilus together with these by-products can improve soil fertility parameters and decrease adverse effects associated with vinasse fertilization, in addition to providing shoot and root growth and providing collective synergy for a high yield of sugarcane production with environmental benefits.

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Section: Discussionmentioning

confidence: 99%

Sugarcane growth and nutrition levels are differentially affected by the application of PGPR and cane waste

Santos

Kandasamy²,

Rigobelo

2018

MicrobiologyOpen

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“…Phytohormones are organic substances that can promote, inhibit, or modify the growth and development of plants at low concentrations (Damam et al, 2016). Phytohormones promote root cell proliferation by overproducing lateral roots and root hairs with a concomitant increase in nutrient and water uptake (Sureshbabu et al, 2016). In this context, the BS-320 isolate was the most competent.…”

Section: Phytohormonesmentioning

confidence: 97%

Promotion of maize growth using endophytic bacteria under greenhouse and field conditions

Santos

Rigobelo

2019

Aust J Crop Sci

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The effect of Bacillus subtilis isolates before being used as inoculants is very important. They present various impacts on promotion and characteristics of plant at different stages of growth. This experiment was carried out on maize under greenhouse conditions with eleven treatments of endophytic bacteria and three repetitions. The better isolates under greenhouse conditions were used in the field experiment with four best treatments and six replicates. The traits evaluated under both conditions were height, shoot and root dry matter, and the nitrogen and phosphorus content in the plant and soil and the total number of bacteria in the soil. Under greenhouse conditions, the groups that received Bacillus spp. showed higher amount of soluble phosphorus and total numbers of bacteria compared to control. Under field condition, isolate BS-290 increased the nitrogen and phosphorus concentrations in shoot dry matter, phosphorus concentration in dry soil and the total number of bacteria in the soil, compared to the control. Isolate BS-320 increased the phosphorus concentration in plants and maize yield, which strongly suggests its use as a biological inoculant for maize crops. BS-248, BS 290 and BS-320 isolates promoted the highest maize growth, compared to the other isolates. The results showed that Bacillus subtilis isolates that promote plant growth did not increase similar traits in all plants and the behavior has been highly isolate-dependent. This finding shows that the isolates had a preference and certain specificity on each individual trait.

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“…Siderophore which means iron carrier or iron chelating is an important strategy developed to increase iron (Fe 3+ ) bioavailability as a unique constituent of cytochrome, enzymes co-factor and heme or non-heme proteins. Siderophores are low molecular weight biomolecules produced by microorganisms and has strong affinity with Fe 3+ ions (Sureshbabu et al, 2016). When Fe is limited, microbial iron chelating agents (siderophores) scavenge and provide plants with Fe from the mineral phase through the formation of soluble Fe 3+ complexes.…”

Section: Production Of Siderophorementioning

confidence: 99%

Plant Growth Promoting Rhizobacteria (PGPR): A Novel Agent for Sustainable Food Production

Kenneth

Nwadibe

Kalu

et al. 2019

American Journal of Agricultural and Biological Sciences

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Plant Growth Promoting Rhizobacteria (PGPR) involves the use of large array of soil bacteria to improve yield, plant growth and sustainable food production. As free living and symbiotic rhizobacteria, PGPR exert its role by colonizing extracellular and/or intracellular rhizoenvironment in the quest for carbon source. In the past decades, focus has been on developing a biosafety agro base approach void of continuous burden on soil micro flora as a result of agrochemicals application. However, with clear understanding of PGPR mechanisms of action "biocontrol, biofertilization and biostimulation", more hope on the possibility of curbing food insecurity amidst rising population has been strengthened. Seeds or soil application of PGPR inoculants enhances phosphates solubilization, biological nitrogen fixation and secretion of plant hormones (indole acetic acid, gibberellins, cytokinins and ethylene) needed for growth and adaptation in stressed environment. As soil pathogen constantly rival the roles of these organisms, PGPR has developed over time wide spectrum of strategies in the form of systemic resistance, iron, space and nutrient competition, antibiotics synthesis, lytic acid production and hydrogen cyanide for efficient food production. In view of this, the review broadens our scope on the use of PGPR as an efficient microbial consortium for enhanced agrobiology and sustenance especially in the tropics were paucity of data on its use, implementation and application of genetically modified organisms has long prevailed.

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Amazing Multiple Function Properties of Plant Growth Promoting Rhizobacteria in the Rhizosphere Soil

Cited by 58 publications

References 66 publications

Sugarcane growth and nutrition levels are differentially affected by the application of PGPR and cane waste

Sugarcane growth and nutrition levels are differentially affected by the application of PGPR and cane waste

Promotion of maize growth using endophytic bacteria under greenhouse and field conditions

Plant Growth Promoting Rhizobacteria (PGPR): A Novel Agent for Sustainable Food Production

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