How Chromium-Resistant Bacteria Can Improve
Corn Growth in Chromium-Contaminated
Growing Medium

Fatima, Hadia-e; Ahmed, Ambreen

doi:10.15244/pjoes/63334

Cited by 16 publications

(5 citation statements)

References 6 publications

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“…RAH3) were obtained from Punjab Seed Corporation, Lahore. Seeds were surface sterilized by following Fatima and Ahmed 11 . Pre-germination and post-germination treatments were given to the sterilized seeds.…”

Section: Bacterial Treatment Experimentsmentioning

confidence: 99%

Phyllospheric Bacterial Treatments Improve Growth in Helianthus annuus L.

Iqbal

Wagi

Ahmed

2018

RADS J. Biol. Res. Appl. Sci

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The current study focuses on the effect of variation in time of bacterial treatment during different growth phases of seeds on plant growth improvement using Helianthus annuus L. For this purpose, two phyllospheric auxin-producing bacterial strains Bacillus thuringiensis (E4) and Lysinobacillus fusiformis (E6) were used for bacterial treatment. Two experiments were conducted in the present work with pre-germination and post-germination inoculation treatments to seeds. A comparative analysis was made in order to find out the efficiency of Bacillus thuringiensis (E4) and Lysinobacillus fusiformis (E6) for improving growth of Helianthus annuus L. Post-germination treatments were found effective with Bacillus thuringiensis (E4) but Lysinobacillus fusiformis (E6) worked well in both treatments i.e., in pre-germination and in post-germination inoculation treatment.

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Section: Bacterial Treatment Experimentsmentioning

confidence: 99%

Phyllospheric Bacterial Treatments Improve Growth in Helianthus annuus L.

Iqbal

Wagi

Ahmed

2018

RADS J. Biol. Res. Appl. Sci

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“…Three selected chromium-tolerant bacterial isolates (i.e., EI, AR, and 3a) previously isolated by Fatima and Ahmed (2016) from plant rhizosphere were checked for their auxin production potential, characterised by Cappuccino and Sherman (2007) and identified using 16S rDNA. Bacterial auxin was optimised by growing the plants under various physiological conditions, i.e., varying temperatures, different concentrations of chromium, and addition of a precursor.…”

Section: Characterisation Of Chromium-tolerant Isolatesmentioning

confidence: 99%

“…Inoculation experiment with Helianthus annuus L. The inoculation experiment was performed using selected isolates under chromium stress, i.e., 0, 100, 200, 300, 400, and 500 mg/L following Fatima and Ahmed (2016). For wirehouse and laboratory experiments, 7.3 kg and 181.9 g soil was used in each pot, respectively, with no added fertilisers.…”

Section: Characterisation Of Chromium-tolerant Isolatesmentioning

confidence: 99%

Indole-3-acetic acid synthesizing chromium-resistant bacteria can mitigate chromium toxicity in Helianthus annuus L.

Ahmed¹,

Fatima²

2020

PLANT SOIL ENVIRON

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Use of microorganisms as heavy metal remediators is an effective approach for chromium reduction in plants. Chromium carcinogenicity (Cr6+) beyond the permissible levels elicits environmental and health problems. To reduce chromium toxicity along with the plant growth improvement, a cost-effective and eco-friendly remediation approach is necessary. In the current study, chromium-resistant bacterial species were evaluated for growth improvement of sunflower. Three auxin-producing bacteria able to tolerate hexavalent chromium, i.e., Sporosarcina saromensis (EI) and two species of Bacillus cereus (AR and 3a) were selected for the proposed study. Growth studies along with auxin synthesis potential of bacterial isolates with and without chromium were conducted. Results revealed a 188% enhancement in plant height under laboratory-grown plants with B. cereus (AR) under 500 mg/L chromium stress (Cr6+). B. cereus (3a) also showed an 81% increase in leaf number with 400 mg/L chromium stress in laboratory-grown plants. Similarly, 73% increment in the amount of auxin was reported in the case of inoculation with S. saromensis isolate (EI) over respective control treatment. These improvements provide an excellent means of reducing chromium (Cr6+) in the contaminated soils naturally by stimulating plant growth along with bioremediation potential.

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“…Culture characteristics as well as cell morphology was observed. To examine bacterial physiology, growth curve, temperature and pH, the studies were conducted following the research of Fatima and Ahmed 16 .…”

Section: Isolation and Characterization Of Bacteriamentioning

confidence: 99%

“…Ten strains were used in the plant-microbe interaction experiment and their effect on plant growth was observed by recording various growth parameters following the study by Fatima and Ahmed 16 . The experiment was repeated thrice.…”

Section: Plant-microbe Interactionsmentioning

confidence: 99%

Study of the Modulating Interactions of Multitrait Rhizobacteria Using Zea Mays L. as the Host Plant

Shakeel¹,

Javaid²,

Ahmed³

2020

RADS J. Biol. Res. Appl. Sci

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Background: Rhizosphere is a soil region closest to roots of the plants inhabiting different types of microorganisms including rhizobacteria. Chemical fertilizers which are conventionally used for increasing crop production are dangerous in terms of minimizing the nutritional value of crops and may also be hazardous for biological agents. Therefore, the use of Plant Growth Promoting Rhizobacteria (PGPR) are favorable for improved crop production over chemical fertilizers. Objectives: The current study highlights the growth promoting traits of bacterial isolates through isolation of rhizospheric bacterial strains from different plants. Methodology: In this study, ten rhizospheric bacterial isolates were used, which were morpho-physiologically characterized and then tested for plant growth-promoting traits i.e., HCN production, ammonification and auxin production. Most of the bacterial strains gave positive results for these plant growth-promoting traits. To study the beneficial effects of these bacteria on plants, plant-microbial interaction assay was conducted using Zea mays. Results: Results revealed that these bacteria enhanced the growth as compared to control plants. Bacterial isolates Streptomyces lydicus (Cn6), Staphylococcus aureus (Cn7) and Bacillus pumilus (PP3) showed strong ammonia producing effects. The isolates Bacillus subtilis (Cn2), PP2 and PP5 exhibited strong potential of HCN production whereas only Streptomyces lydicus (Cn6) and Bacillus pumilus (PP3) were observed to be auxin producers. A maximum increase in fresh weight of the plants was observed in treatment with PP2 showing 94.36% increase over controls. Cn1 showed an increase (26.12%) in shoot length while Cn5 revealed a prominent increase (64.95%) in root length compared to the control plant. The isolates Cn5 and Cn4 showed improvement in the total chlorophyll content of the treated plants with a percentage increase of 100% and 99.82%, respectively compared to the control. Conclusion: In conclusion, these PGPR may be further used in agriculture research for growth improvement.

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How Chromium-Resistant Bacteria Can Improve Corn Growth in Chromium-Contaminated Growing Medium

Cited by 16 publications

References 6 publications

Phyllospheric Bacterial Treatments Improve Growth in Helianthus annuus L.

Phyllospheric Bacterial Treatments Improve Growth in Helianthus annuus L.

Indole-3-acetic acid synthesizing chromium-resistant bacteria can mitigate chromium toxicity in Helianthus annuus L.

Study of the Modulating Interactions of Multitrait Rhizobacteria Using Zea Mays L. as the Host Plant

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