Evaluation of Selected Bacterial Endophytes for Biocontrol Potential against Phytophthora Blight of Bell Pepper (Capsicum annuum L.)

A, Irabor; Mt, Mmbaga

doi:10.4172/2157-7471.1000424

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…Seven efficient PSB (ZW9, ZW32, SSR, D1, S1, TJA, and TAYB) selected for consortia development were studied for in vitro compatibility test (Irabor and Mmbaga, 2017). Bacterial inoculum was spotted on nutrient agar plate spread with the tested strain.…”

Section: Development Of Psb Consortiamentioning

confidence: 99%

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

et al. 2021

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Phosphorous (P) deficiency is a major challenge faced by global agriculture. Phosphate-solubilizing bacteria (PSB) provide a sustainable approach to supply available phosphates to plants with improved crop productivity through synergistic interaction with plant roots. The present study demonstrates an insight into this synergistic P-solubilizing mechanism of PSB isolated from rhizosphere soils of major wheat-growing agro-ecological zones of Pakistan. Seven isolates were the efficient P solubilizers based on in vitro P-solubilizing activity (233-365 μg ml–1) with a concomitant decrease in pH (up to 3.5) by the production of organic acids, predominantly acetic acid (∼182 μg ml–1) and gluconic acid (∼117 μg ml–1). Amplification and phylogenetic analysis of gcd, pqqE, and phy genes of Enterobacter sp. ZW32, Ochrobactrum sp. SSR, and Pantoea sp. S1 showed the potential of these PSB to release orthophosphate from recalcitrant forms of phosphorus. Principal component analysis indicates the inoculation response of PSB consortia on the differential composition of root exudation (amino acids, sugars, and organic acids) with subsequently modified root architecture of three wheat varieties grown hydroponically. Rhizoscanning showed a significant increase in root parameters, i.e., root tips, diameter, and surface area of PSB-inoculated plants as compared to uninoculated controls. Efficiency of PSB consortia was validated by significant increase in plant P and oxidative stress management under P-deficient conditions. Reactive oxygen species (ROS)-induced oxidative damages mainly indicated by elevated levels of malondialdehyde (MDA) and H2O2 contents were significantly reduced in inoculated plants by the production of antioxidant enzymes, i.e., superoxide dismutase, catalase, and peroxidase. Furthermore, the inoculation response of these PSB on respective wheat varieties grown in native soils under greenhouse conditions was positively correlated with improved plant growth and soil P contents. Additionally, grain yield (8%) and seed P (14%) were significantly increased in inoculated wheat plants with 20% reduced application of diammonium phosphate (DAP) fertilizer under net house conditions. Thus, PSB capable of such synergistic strategies can confer P biofortification in wheat by modulating root morphophysiology and root exudation and can alleviate oxidative stress under P deficit conditions.

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Section: Development Of Psb Consortiamentioning

confidence: 99%

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

et al. 2021

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“…Furthermore, plant inoculation with the pathogen may have provided an unusually high inoculum level. In another study in which pepper seed was soaked in bacterial BCA inoculum for 1 h before planting, root rot disease severity from P. capsici was reduced and pepper yield increased [36]. Previous analysis of mechanisms of some bacterial strains that protect their hosts from root diseases have shown that the bacteria produce antifungal antibiotics, elicit induced systemic resistance in the host plant or interfere with fungal pathogenicity factors [24].…”

Section: Resultsmentioning

confidence: 99%

“…Endophytic microorganisms are mostly fungi and bacteria [31,33]. In our previous research, several bacteria that colonized flowering dogwood (Cornus florida) endophytically, displayed great potential in controlling powdery mildew and macrophomina root rot in greenhouse conditions [30][31][32]; some showed potential in controlling Phytophthora root rot in greenhouse conditions [36]. This study was initiated to screen additional endophytes for bioactivity against diverse root rot pathogens and identify those with potential as biological control agents for pepper (Capsicum annuum) root rot pathogens.…”

Section: Introductionmentioning

confidence: 99%

Screening of Plant Endophytes as Biological Control Agents against Root Rot Pathogens of Pepper (Capsicum annum L.)

Mt¹,

Gurung²,

Maheshwari³

2018

J Plant Pathol Microbiol

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In this study, 16 endophytes previously isolated from flowering dogwood (Cornus florida) stem tissue without causing any external symptoms, were screened for bioactivity against different root rot pathogens, Fusarium solani, Fusarium oxysporum, Macrophomina phaseolina and three Phytophthora species. While most of the endophytes suppressed pathogen growth in dual culture and exhibited potential as biological control agents, one fungal endophyte A22F1, (Nigrospora sphaerica) was evaluated further in growth chamber and greenhouse experiments in which it markedly reduced Phytophthora capsici root rot on three pepper cultivars 'California Wonder', 'Pepper Cayenne' and 'Numex Primarvera'. Thus, endophyte A22F1 has high potential as a biological control agent for P. capsici in pepper. It's in vitro bioactivity displayed against F. solani, F. oxysporum, and M. phaseolina require additional in vivo studies on susceptible hosts.

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“…Salah satu bentuk konsorsium mikroba adalah bikultur, yaitu isolat yang menggunakan dua populasi mikroba berbeda. Untuk menentukan kombinasi isolat yang memiliki potensi aditif dan efek sinergis untuk hasil etanol yang lebih baik, diperlukan uji kompatibilitas (Irabor et al, 2017).…”

Section: Pendahuluanunclassified

The Potential of Hot Water Sapan Sungai Aro Thermophilic Bacteria Consortium in Producing Bioethanol

Fatia,

Irdawati,

Advinda

et al. 2023

BSc

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Biofuel is a potentially renewable alternative fuel in Indonesia. Bioethanol is one example of the most commonly used biofuel. Microorganisms of thermophilic bacteria are known to contribute to the production of bioethanol. Thermophilic bacteria are efficient against high temperature conditions so as to minimize contamination. Production of bioethanol can also use joint culture (consortium). Bioethanol production using a microbial biculture consortium is known to significantly increase the level of bioethanol production. The purpose of this study was to determine the compatibility and to determine the optimum potential of the thermophilic bacterial biculture consortium of Sapan Sungai Aro hot water for bioethanol production. This research is a type of descriptive research. To test the cooperation between consortium isolates of thermophilic bacteria producing bioethanol, a compatibility test was carried out using the disk diffusion method. Then the consortium isolates were fermented in liquid TMM (Thermophilic Minimum Media) medium, the bioethanol content was measured after distillation using a pycnometer. The results of the bacterial compatibility test showed that there was one pair of isolates that were not compatible, namely SSA 8 & SSA 14 due to the presence of a clear zone. On research results. The production of bioethanol by a consortium of thermophilic bacteria gives more optimal results compared to a single isolate. The best thermophilic bacterial biculture consortium from the Sapan Sungai Aro hot spring in producing biofuels is SSA 14 & SSA 16 which is 3.009%.

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Evaluation of Selected Bacterial Endophytes for Biocontrol Potential against Phytophthora Blight of Bell Pepper (Capsicum annuum L.)

Cited by 6 publications

References 43 publications

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

Screening of Plant Endophytes as Biological Control Agents against Root Rot Pathogens of Pepper (Capsicum annum L.)

The Potential of Hot Water Sapan Sungai Aro Thermophilic Bacteria Consortium in Producing Bioethanol

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