Auxin-producing Bacillus sp.: Auxin quantification and effect on the growth of Solanum tuberosum

Ahmed, Ambreen; Hasnain, Shahida

doi:10.1351/pac-con-09-02-06

Cited by 102 publications

(38 citation statements)

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“…For instance, IAA producing B. flexus P4 and Bacillus sp. S6 increased Solanum tuberosum root length by 40 and 50%, respectively, compared with non-inoculated control 62 , while S. meliloti TSA41 and Streptomyces sp. W43N highly improved the levels of IAA in Dark Opal basil plants, in comparison with controls 63 .…”

Section: Discussionmentioning

confidence: 90%

Facilitation of phosphorus uptake in maize plants by mycorrhizosphere bacteria

Battini

Grønlund

Agnolucci

et al. 2017

Sci Rep

168

104

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A major challenge for agriculture is to provide sufficient plant nutrients such as phosphorus (P) to meet the global food demand. The sufficiency of P is a concern because of it’s essential role in plant growth, the finite availability of P-rock for fertilizer production and the poor plant availability of soil P. This study investigated whether biofertilizers and bioenhancers, such as arbuscular mycorrhizal fungi (AMF) and their associated bacteria could enhance growth and P uptake in maize. Plants were grown with or without mycorrhizas in compartmented pots with radioactive P tracers and were inoculated with each of 10 selected bacteria isolated from AMF spores. Root colonization by AMF produced large plant growth responses, while seven bacterial strains further facilitated root growth and P uptake by promoting the development of AMF extraradical mycelium. Among the tested strains, Streptomyces sp. W94 produced the largest increases in uptake and translocation of 33P, while Streptomyces sp. W77 highly enhanced hyphal length specific uptake of 33P. The positive relationship between AMF-mediated P absorption and shoot P content was significantly influenced by the bacteria inoculants and such results emphasize the potential importance of managing both AMF and their microbiota for improving P acquisition by crops.

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Section: Discussionmentioning

confidence: 90%

Facilitation of phosphorus uptake in maize plants by mycorrhizosphere bacteria

Battini

Grønlund

Agnolucci

et al. 2017

Sci Rep

168

104

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“…Auxin is one of the crucial molecules, regulating most plant processes directly or indirectly [80] as was further proven when Ahmed and Hasnain [35] reported that auxin-producing Bacillus spp. inflicts a positive effect on Solanun tuberosum ’s growth.…”

Section: Role Of Plant Growth Promoting Rhizobacteria For Plant Grmentioning

confidence: 99%

Role of Plant Growth Promoting Rhizobacteria in Agricultural Sustainability—A Review

et al. 2016

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Plant growth promoting rhizobacteria (PGPR) shows an important role in the sustainable agriculture industry. The increasing demand for crop production with a significant reduction of synthetic chemical fertilizers and pesticides use is a big challenge nowadays. The use of PGPR has been proven to be an environmentally sound way of increasing crop yields by facilitating plant growth through either a direct or indirect mechanism. The mechanisms of PGPR include regulating hormonal and nutritional balance, inducing resistance against plant pathogens, and solubilizing nutrients for easy uptake by plants. In addition, PGPR show synergistic and antagonistic interactions with microorganisms within the rhizosphere and beyond in bulk soil, which indirectly boosts plant growth rate. There are many bacteria species that act as PGPR, described in the literature as successful for improving plant growth. However, there is a gap between the mode of action (mechanism) of the PGPR for plant growth and the role of the PGPR as biofertilizer-thus the importance of nano-encapsulation technology in improving the efficacy of PGPR. Hence, this review bridges the gap mentioned and summarizes the mechanism of PGPR as a biofertilizer for agricultural sustainability.

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“…This bacterial IAA changes the plant auxin pool to either optimal or supraoptimal levels and improves plant growth directly hence proved to be crucial for better development of plants (Iqbal, Wagi & Ahmed, 2017). Bacterial IAA has phytostimulatory impacts and improves plant growth by improving plant roots development and increasing the surface area to volume ratio of roots and consequently results in better uptake of water and nutrients (Ahmed & Hasnain, 2010). The current study deals with the study of various growth promoting attributes of plant growth-promoting rhizobacteria (PGPR) isolates and impacts of various factors i.e.…”

Section: Introductionmentioning

confidence: 99%

Bacillus spp.: potent microfactories of bacterial IAA

Wagi

Ahmed

2019

PeerJ

Self Cite

113

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Background Auxin production by bacteria is one of the most important direct mechanisms utilized by plant growth-promoting bacteria (PGPB) for the betterment of plants naturally because auxin is a plant friendly secondary metabolite synthesized naturally by bacteria, and hence improves the growth of associated plants. So, the current study focuses on bacterial synthesis of Indole-3-acetic acid (IAA) for plant growth improvement. Methods In the current study, the PGPB were selected on the basis of their auxin production potential and their growth promoting attributes were evaluated. Indole-3-acetic acid producing potential of two selected bacterial isolates was observed by varying different growth conditions i.e., media composition, carbon sources (glucose, sucrose and lactose) and different concentrations of precursor. Influence of various physiological factors (temperature and incubation time period) on IAA production potential was also evaluated. Results Both the bacterial strains Bacillus cereus (So3II) and B. subtilis (Mt3b) showed variable potential for the production of bacterial IAA under different set of growth and environmental conditions. Hence, the IAA production potential of the bacterial isolates can be enhanced by affecting optimum growth conditions for bacterial isolates and can be used for the optimal production of bacterial IAA and its utilization for plant growth improvement can lead to better yield in an eco-friendly manner.

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Auxin-producing Bacillus sp.: Auxin quantification and effect on the growth of Solanum tuberosum

Cited by 102 publications

References 1 publication

Facilitation of phosphorus uptake in maize plants by mycorrhizosphere bacteria

Facilitation of phosphorus uptake in maize plants by mycorrhizosphere bacteria

Role of Plant Growth Promoting Rhizobacteria in Agricultural Sustainability—A Review

Bacillus spp.: potent microfactories of bacterial IAA

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