Effects of two new siderophore-producing rhizobacteria on growth and iron content of maize and canola plants

Ghavami, N.; Alikhani, Hossein Ali; Pourbabaee, Ahmad Ali; Besharati, H

doi:10.1080/01904167.2016.1262409

Cited by 87 publications

(38 citation statements)

References 30 publications

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“…Bacteria of the genus Rhizobium, e.g., Rhizobium meliloti, produces carboxylate type siderophore, but fluorescent pseudomonads are known to produce mixed siderophores containing both hydroxamate and catecholate types [153]. Micrococcus yunnanensis YIM 65004 (T) and Stenotrophomonas chelatiphaga LPM-5 (T) significantly improved grain weight and iron (Fe) content of roots and shoots of canola and maize plants under greenhouse conditions compared to the control [2,153]. S. Chelatiphaga significantly (p < 0.05) raised the root and shoot Fe contents by 64.99% and 10.55% in maize and by 8.97% and 462.18% in canola, respectively, while M. Yunnanensis elevated the root and shoot Fe contents by 43.12% and 14.81% in maize and by 38.26% and 212.72% in canola, respectively.…”

Section: The Beneficial Effects Of Pgpr In Mineral Nutrient Uptake Inmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

2019

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Abiotic stresses arising from climate change negates crop growth and yield, leading to food insecurity. Drought causes oxidative stress on plants, arising from excessive production of reactive oxygen species (ROS) due to inadequate CO2, which disrupts the photosynthetic machinery of plants. The use of conventional methods for the development of drought-tolerant crops is time-consuming, and the full adoption of modern biotechnology for crop enhancement is still regarded with prudence. Plant growth-promoting rhizobacteria (PGPR) could be used as an inexpensive and environmentally friendly approach for enhancing crop growth under environmental stress. The various direct and indirect mechanisms used for plant growth enhancement by PGPR were discussed. Synthesis of 1-aminocyclopropane−1-carboxylate (ACC) deaminase enhances plant nutrient uptake by breaking down plant ACC, thereby preventing ethylene accumulation, and enable plants to tolerate water stress. The exopolysaccharides produced also improves the ability of the soil to withhold water. PGPR enhances osmolyte production, which is effective in reducing the detrimental effects of ROS. Multifaceted PGPRs are potential candidates for biofertilizer production to lessen the detrimental effects of drought stress on crops cultivated in arid regions. This review proffered ways of augmenting their efficacy as bio-inoculants under field conditions and highlighted future prospects for sustainable agricultural productivity.

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Section: The Beneficial Effects Of Pgpr In Mineral Nutrient Uptake Inmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

2019

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“…One of the key mechanisms of PGPR in promoting plant growth involves the production of secondary metabolites such as siderophores (Verma et al 2011 ; Ghavami et al 2017 ). Although iron is abundantly available in soil, most of it is unavailable to the plant or other organisms, because it forms insoluble complexes.…”

Section: Introductionmentioning

confidence: 99%

Modified microplate method for rapid and efficient estimation of siderophore produced by bacteria

2017

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In this study, siderophore production by various bacteria amongst the plant-growth-promoting rhizobacteria was quantified by a rapid and efficient method. In total, 23 siderophore-producing bacterial isolates/strains were taken to estimate their siderophore-producing ability by the standard method (chrome azurol sulphonate assay) as well as 96 well microplate method. Production of siderophore was estimated in percent siderophore unit by both the methods. It was observed that data obtained by both methods correlated positively with each other proving the correctness of microplate method. By the modified microplate method, siderophore production by several bacterial strains can be estimated both qualitatively and quantitatively at one go, saving time, chemicals, making it very less tedious, and also being cheaper in comparison with the method currently in use. The modified microtiter plate method as proposed here makes it far easier to screen the plant-growth-promoting character of plant-associated bacteria.

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“…In earlier studies by Vendan et al [209], several endophytic rhizobacteria such as Bacillus cereus, B. flexus, B. megaterium, Lysinibacillus fusiformis, L. sphaericus, Microbacterium phyllosphaerae, Micrococcus luteus isolated from maize also exhibited excellent siderophore production abilities. Siderophore-producing rhizobacteria have also been isolated from maize and canola in Iran [210], peach, and pear roots in Turkey [211], corn in Brazil [87], and banana in Kenya [212], among others.…”

Section: Iron Sequestersmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Biofertilizers for Sustainable Crop Production: The Past, Present, and Future

Aloo¹,

Makumba²,

Mbega³

2020

Preprint

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The world’s population is increasing and so are agricultural activities to match the growing demand for food. Conventional agricultural practices generally employ artificial fertilizers to increase crop yields, but these have multiple environmental and human health effects. For decades, environmentalists and sustainability researchers have focused on alternative crop fertilization mechanisms to address these challenges, and biofertilizers have constantly been researched, recommended, and even successfully-adopted for several crops. Biofertilizers are microbial formulations made of indigenous plant growth-promoting rhizobacteria (PGPR) which can naturally improve plant growth either directly or indirectly, through the production of phytohormones, solubilization of soil nutrients, and production of iron-binding metabolites; siderophores. Biofertilizers, therefore, hold immense potential as tools for sustainable crop production especially in the wake of climate change and global warming. Despite the mounting interest in this technology, their full potential has not yet been realized. This review updates our understanding of the PGPR biofertilizers and sustainable crop production. It evaluates the history of these microbial products, assesses their present state of utilization, and also critically propounds on their future prospects for sustainable crop production. Such information is desirable to fully evaluate their potential and can ultimately pave the way for their increased adoption for crop production.

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Effects of two new siderophore-producing rhizobacteria on growth and iron content of maize and canola plants

Cited by 87 publications

References 30 publications

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

Modified microplate method for rapid and efficient estimation of siderophore produced by bacteria

Plant Growth Promoting Rhizobacterial Biofertilizers for Sustainable Crop Production: The Past, Present, and Future

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