Endophytic bacteria derived from the desert-spurge (Euphorbia antiquorum L.) suppress Fusarium verticillioides, the causative agent of maize ear and root rot

Dinango, Vanessa Nya; Eke, Pierre; Youmbi, Diane Yimta; Kouokap, Lanvin Rochal Kepngop; Toghueo, Rufin Marie Kouipou; Tamghe, Gilbert Ghomsi; Mabou, Lile Christelle Nguemnang; Wakam, Louise Nana; Boyom, Fabrice Fekam

doi:10.1016/j.rhisph.2022.100562

Cited by 5 publications

(28 citation statements)

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“…The latter is the most important and the most reported worldwide and in Cameroon. 2 This fungus is a highly destructive soil-borne plant pathogen. 3 The control of F. verticillioides is difficult because it can survive in the soil for long periods in the form of resistant structures or as mycelium and conidia on residues from remnant harvest.…”

Section: Introductionmentioning

confidence: 99%

“…Particular consideration was given to endophytes for the biocontrol of vascular diseases, including F. verticillioides. 2,9 In fact, these endophytic bacteria colonize the same ecological niche as the pathogen. This is very advantageous for these potential candidates, as they act against phytopathogens through various mechanisms of action.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 In our previous study, endophytic bacteria from desert spurge (E. antiquorum L.) were investigated for their biocontrol potential against maize root and ear rot caused by F. verticillioides under laboratory and greenhouse conditions. 2 A substantial disparity between the in vitro responses and in planta efficiency of biological control agents against maize ear and root rot was observed. The need to revisit the screening processes utilized for the bioprospecting of potent biocontrol candidates was highlighted.…”

Section: Introductionmentioning

confidence: 99%

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Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Dinango,

Dhouib,

Wakam

et al. 2023

Pest Management Science

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BACKGROUNDFusarium maize ear and root rot disease caused by Fusarium verticillioides has become one of the most serious fungal diseases associated with maize production. Due to their abilities to promote plant development and manage diseases, bacterial endophytes provide a more promising approach for treating this vascular disease.RESULTSThis work was undertaken for the selection and identification of promising isolates as plant growth promoters and biocontrol agents against F. verticillioides in maize agroecosystems. A screening procedure consisting of in vitro and in situ tests was applied to 27 endophytic strains originating from desert plants: Euphorbia antiquorum, Calotropis procera, and Alcasia albida. In vitro studies indicated that the bacteria exhibited variable results in biocontrol, endophytism, and plant growth‐promoting traits. In addition, in situ plant growth promotion and biocontrol experiments allowed the identification of the most promising bacterial endophytes. In vitro and in situ comparative study results indicated a low correlation. Our data revealed that in situ screening must be used as the method of selection of biocontrol agents against Fusarium ear and root rot disease. Based on in situ results, seven potent strains were selected and identified as Bacillus subtilis, Bacillus velezensis, Bacillus tequilensis, Stenotrophomonas maltophilia, and Klebsiella pneumoniae.CONCLUSIONThe results of this study showed that the selected strains seem to be promising candidates to be exploited as biofertilizers and biocontrol agents against Fusarium maize ear and root rot disease.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Dinango,

Dhouib,

Wakam

et al. 2023

Pest Management Science

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“…In 2020, Egypt produces 7,500,000 tons of maize from the harvested area of 1,458,881 ha ( FAOSTAT, 2022 ). The Food and Agriculture Organization of the United Nations predicts that the world target of 2.4% annual production yield development will not be met, with estimates predicting a 7% yield decline due to biotic and abiotic factors ( Admin MINADER—Assessment of the 2019/2020 Crop Year and Food Availability in the Adamawa, East, Far, 2022 ; Dinango et al, 2022 ). Overall, food and feeds such as cereals are commonly contaminated with mycotoxigenic fungi and mycotoxins, which are a serious problem faced by many countries ( Lee and Ryu, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…annual production yield development will not be met, with estimates predicting a 7% yield decline due to biotic and abiotic factors (Admin MINADER-Assessment of the 2019/2020 Crop Year and Food Availability in the Adamawa, East, Far, 2022;Dinango et al, 2022). Overall, food and feeds such as cereals are commonly contaminated with mycotoxigenic fungi and mycotoxins, which are a serious problem faced by many countries (Lee and Ryu, 2017).…”

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confidence: 99%

Antifungal activity of eco-safe nanoemulsions based on Nigella sativa oil against Penicillium verrucosum infecting maize seeds: Biochemical and physiological traits

et al. 2023

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The main goals of the present investigation were to develop O/W nanoemulsion fungicides based on cold-pressed Nigella sativa (black seed) oil to prevent Penicillium verrucosum infection of maize seeds and to test their antifungal activity against this fungus. Additionally, the effect of these nanoemulsions on plant physiological parameters was also investigated. Two nonionic surfactants namely Tween 20 and Tween 80 were used as emulsifying agents in these formulations. The effect of sonication time and surfactant type on the mean droplet size, polydispersity index (PDI), and zeta potential of the nanoemulsions were determined by dynamic light scattering (DLS). Results indicated that both sonication time and emulsifier type had pronounced effects on the stability of O/W nanoemulsions with a small particle size range (168.6–345.3 nm), acceptable PDI (0.181–0.353), and high zeta potential (−27.24 to –48.82 mV). Tween 20 showed superior stability compared to Tween 80 nanoemulsions. The in vitro results showed that complete inhibition of P. verrucosum-growth was obtained by 10_T80 and 10_T20 nanoemulsions at 100% concentration. All nanoemulsions had increment effects on maize seed germination by 101% in the case of 10_T20 and 10_T80 compared to untreated seeds or the chemical fungicide treatment. Nanoemulsions (10_T20 and 10_T80) were able to stimulate root and shoot length as compared to the fungicide treatment. Seed treatment with 10_T80 nanoemulsion showed the highest AI and protease activity by 75 and 70%, respectively, as compared to the infected control. The produced nanoemulsions might provide an effective protectant coating layer for the stored maize seeds.

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Endophytic bacteria, from the desert spurge (Euphorbia antiquorum) enhance nutrients uptake and suppress root rot in the common bean

Eke,

Kuleshwar Prasard,

Asharani

et al. 2023

Biocatalysis and Agricultural Biotechnology

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Endophytic bacteria derived from the desert-spurge (Euphorbia antiquorum L.) suppress Fusarium verticillioides, the causative agent of maize ear and root rot

Cited by 5 publications

References 50 publications

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Antifungal activity of eco-safe nanoemulsions based on Nigella sativa oil against Penicillium verrucosum infecting maize seeds: Biochemical and physiological traits

Endophytic bacteria, from the desert spurge (Euphorbia antiquorum) enhance nutrients uptake and suppress root rot in the common bean

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