Molecular Identification and Evaluation of Indigenous Bacterial Isolates for Their Plant Growth Promoting and Biological Control Activities against Fusarium Wilt Pathogen of Tomato

Islam, Amanul; Kabir, Md. Shahinur; Khair, and Abul

doi:10.5423/ppj.oa.06.2018.0104

Cited by 12 publications

(7 citation statements)

References 32 publications

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“…The isolated Coliform bacteria and the isolated non-hemolytic Streptococci showed mono-resistance to ceftriaxone and ampicillin, respectively. These findings accord with those published elsewhere, showing high rates of antibiotic resistance to airborne Staphylococci species and Gram-negative bacilli [ 17 , 27 ]. The study in indoor sites of a university in Ghana also found high rates of antibiotic resistance in airborne bacteria that included both Gram-positive cocci and Gram-negative bacilli [ 10 ].…”

Section: Discussionsupporting

confidence: 93%

Bacteria and Their Antibiotic Resistance Profiles in Ambient Air in Accra, Ghana, February 2020: A Cross-Sectional Study

et al. 2021

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Inappropriate use of antibiotics has led to the presence of antibiotic-resistant bacteria in ambient air. There is no published information about the presence and resistance profiles of bacteria in ambient air in Ghana. We evaluated the presence and antibiotic resistance profiles of selected bacterial, environmental and meteorological characteristics and airborne bacterial counts in 12 active air quality monitoring sites (seven roadside, two industrial and three residential) in Accra in February 2020. Roadside sites had the highest median temperature, relative humidity, wind speed and PM10 concentrations, and median airborne bacterial counts in roadside sites (115,000 CFU/m3) were higher compared with industrial (35,150 CFU/m3) and residential sites (1210 CFU/m3). Bacillus species were isolated in all samples and none were antibiotic resistant. There were, however, Pseudomonas aeruginosa, Escherichia coli, Pseudomonas species, non-hemolytic Streptococci, Coliforms and Staphylococci species, of which six (50%) showed mono-resistance or multidrug resistance to four antibiotics (penicillin, ampicillin, ciprofloxacin and ceftriaxone). There was a positive correlation between PM10 concentrations and airborne bacterial counts (rs = 0.72), but no correlations were found between PM10 concentrations and the pathogenic bacteria nor their antibiotic resistance. We call for the expansion of surveillance of ambient air to other cities of Ghana to obtain nationally representative information.

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Section: Discussionsupporting

confidence: 93%

Bacteria and Their Antibiotic Resistance Profiles in Ambient Air in Accra, Ghana, February 2020: A Cross-Sectional Study

et al. 2021

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“…In general, Gram-positive bacteria have a cell wall layer that is thicker than the Gramnegative type, while Gram-negative bacteria contain a higher percentage of lipids than positive o\nes (Wulandari et al 2012). Although in this study most of the endophytic bacteria obtained were Gram-negative, some were proven to be biological agents against plant pathogens, such as Brevundimonas olei, which can inhibit the development of Fusarium wilt disease in tomato plants (Islam et al 2019).…”

Section: Discussionmentioning

confidence: 90%

The potential of endophytic bacteria from the root of Eucalyptus pellita as a biocontrol agent against Ralstonia solanacearum

et al. 2021

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Abstract. Susanti Y, Giyanto, Sinaga MS, Mutaqin KH, Tjahjono B. 2021. The potential of endophytic bacteria from the root of Eucalyptus pellita as a biocontrol agent against Ralstonia solanacearum. Biodiversitas 22: 3454-3462. Bacterial wilt disease (BWD) caused by Ralstonia solanacearum is one of the most damaging eucalyptus (Eucalyptus pellita F. Muell.) diseases. However, endophytic bacteria can be utilized to control it. This study aims to obtain and screen endophytic bacteria isolated from the root of eucalyptus as a biocontrol agent against BWD. A pathogenic R. solanacearum was isolated for artificial inoculation; subsequently, isolation, characterization and screening of the potential endophytic bacteria were conducted. Isolates of R. solanacearum demonstrated the pathogenicity for BWD in eucalyptus, with the highest virulence found in Rs 18. In total, 24 isolates of endophytic bacteria were obtained and screened for their biocontrol potential. The endophytic bacteria conveyed the capacity of antibiosis, indole acetic acid (IAA) hormone, nitrogen fixation, phosphate dissolution, protease enzyme and AHL-lactonase, which are the main indicators of bioagent characteristics in endophytic bacteria, as well as being plant growth stimulators. Four isolates were selected with the highest according to the analytic hierarchy process (AHP), identified on the 16S rRNA gene. Most isolates belonged to gram-negative bacteria. The four isolates, namely B33/77 (Serratia nematodiphila), B32/77 (Paenibacillus polymyxa), B13/497 (Brevundimonas olei) and B17/111 (Bacillus megaterium), indicated their potential for biocontrol as plant growth promoters. This study is the first report on the isolation of endophytic bacterial from eucalyptus roots with regard to its benefit as a plant growth promoter. It provides basic information about the characteristics of the endophytic bacteria, which showed potential as a biocontrol agent of R. solanacearum on eucalyptus.

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“…have been shown to protect tomato against Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici and to protect ginseng against black spot caused by Alternaria panax (Islam, Kabir, & Khair, 2019; Sun, Yang, Zhang, & Han, 2018). Some studies have shown that OM can improve the ability of plants to control plant diseases.…”

Section: Discussionmentioning

confidence: 99%

Long‐term fertilisation regimes influence the diversity and community of wheat leaf bacterial endophytes

Sun

Hai-yan

Zhifang

et al. 2021

Annals of Applied Biology

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Plant endophytes exhibit an excellent ability to promote plant growth and control plant diseases. However, the influence of long‐term fertilisation regimes on the diversity and community of plant endophytes has seldom been reported. In this research, Illumina MiSeq sequencing was used to investigate the effect of 34 years of different fertilisation regimes on the diversity and community of wheat (Triticum aestivum L.) leaf endophytes. Results showed that different fertilisation regimes could significantly influence the diversity and community of wheat leaf endophytes. The diversity of leaf endophytes after organic manure fertilisation was different from the diversity after chemical fertilisation and no fertilisation. The endophyte community was significantly different under different fertilisation regimes. Pseudomonas has higher abundance after chemical and organic manure fertilisation than in the no fertilisation treatment. The abundance of Brevundimonas in the organic manure fertilisation treatment group is higher than in chemical and no fertilisation treatment. Redundancy analysis (RDA) showed that the endophyte communities in the chemical and organic manure fertilisation were positively correlated with wheat height, stem diameter, leaf area and yield. This research lays the foundations for understanding the diversity and community of wheat leaf endophytes under different fertilisation regimes and provides useful information for further scientific research on fertilisation.

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Molecular Identification and Evaluation of Indigenous Bacterial Isolates for Their Plant Growth Promoting and Biological Control Activities against Fusarium Wilt Pathogen of Tomato

Cited by 12 publications

References 32 publications

Bacteria and Their Antibiotic Resistance Profiles in Ambient Air in Accra, Ghana, February 2020: A Cross-Sectional Study

Bacteria and Their Antibiotic Resistance Profiles in Ambient Air in Accra, Ghana, February 2020: A Cross-Sectional Study

The potential of endophytic bacteria from the root of Eucalyptus pellita as a biocontrol agent against Ralstonia solanacearum

Long‐term fertilisation regimes influence the diversity and community of wheat leaf bacterial endophytes

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