Streptomyces Strains Promote Plant Growth and Induce Resistance Against Fusarium verticillioides via Transient Regulation of Auxin Signaling and Archetypal Defense Pathways in Maize Plants

Tran, Trang Minh; Ameye, Maarten; Devlieghere, Frank; Saeger, Sarah De; Eeckhout, Mia; Audenaert, Kris

doi:10.3389/fpls.2021.755733

Cited by 17 publications

(7 citation statements)

References 60 publications

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“…It is, therefore, possible that the strain also produces metabolites able to modulate the plant response when facing the fungus. This phenomenon has already been demonstrated in the interaction of streptomycetes on maize infected by Fusarium verticillioides [32]. The complexity of the interactions occurring between streptomycetes and wheat plant is likely multivariate [30].…”

Section: Discussionmentioning

confidence: 73%

Wheat Seed Coating with Streptomyces sp. Strain DEF39 Spores Protects against Fusarium Head Blight

et al. 2022

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Streptomycetes are promising candidates for the biological control of Fusarium Head Blight (FHB) in wheat. Studies involving the use of streptomycetes as biological control agents (BCAs) have been limited to the application when the wheat plant is developed, close to the infection on the spike during flowering. Here, we tested the effects of seed treatment with the Streptomyces sp. DEF39 spores before sowing on FHB symptoms’ development. The seed treatment protected the plant from infection by Fusarium graminearum by 49% (p = 0.04). We traced Streptomyces sp. DEF39 in plant organs using strain-specific primers here developed, showing that the streptomycete acts as an endophyte, colonizing the plant tissues up to the spike as well as the roots. This work suggests that it is possible to use a streptomycete as a seed coating BCA, able to partially protect wheat from FHB disease.

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Section: Discussionmentioning

confidence: 73%

Wheat Seed Coating with Streptomyces sp. Strain DEF39 Spores Protects against Fusarium Head Blight

et al. 2022

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“…Streptomyces are acknowledged for their production of phytohormones such as ethylene, gibberellic acid, indole-3-acetic acid (IAA), phenylacetic acid, cytokines, and ACC deaminases [ 18 , 40 ]. Several phytohormones perform critical roles in controlling the growth of plant parts at various stages of development [ 63 ]. PGPRs may synthesize phytohormones comparable to those synthesized by plants, which aid in plant development [ 64 ].…”

Section: Discussionmentioning

confidence: 99%

Combatting Sugar Beet Root Rot: Streptomyces Strains’ Efficacy against Fusarium oxysporum

Abdelghany,

Yassin,

Abu-Ellail

et al. 2024

Plants

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Sugar beet root rot disease triggered by Fusarium oxysporum f. sp. radicis-betae is a destructive disease and dramatically affects the production and quality of the sugar beet industry. Employing beneficial microorganisms as a biocontrol strategy represents an eco-friendly and sustainable approach to combat various plant diseases. The distinct aspect of this study was to assess the antifungal and plant growth-promoting capabilities of recently isolated Streptomyces to treat sugar beet plants against infection with the phytopathogen F. oxysporum. Thirty-seven actinobacterial isolates were recovered from the rhizosphere of healthy sugar beet plants and screened for their potential to antagonize F. oxysporum in vitro. Two isolates SB3-15 and SB2-23 that displayed higher antagonistic effects were morphologically and molecularly identified as Streptomyces spp. Seed treatment with the fermentation broth of the selected Streptomyces strains SB3-15 and SB2-23 significantly reduced disease severity compared to the infected control in a greenhouse experiment. Streptomyces SB2-23 exhibited the highest protective activity with high efficacy ranging from 91.06 to 94.77% compared to chemical fungicide (86.44 to 92.36%). Furthermore, strain SB2-23 significantly increased plant weight, root weight, root length, and diameter. Likewise, it improves sucrose percentage and juice purity. As a consequence, the strain SB2-23’s intriguing biocontrol capability and sugar beet root growth stimulation present promising prospects for its utilization in both plant protection and enhancement strategies.

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“…Auxin has been reported to participate in plant response to pathogen infection, resulting from host auxin physiology or signaling changes by pathogen challenge or pathogen auxin as well as SA resistance repression ( Wang et al, 2007 ; Yuan et al, 2017 ; Tran et al, 2021 ). Recently, several studies have reported that auxin receptor TIR1 regulates plant immunity ( Su et al, 2021 ), but underlying molecular mechanisms of TIR1 associated with plant response to pathogens remains mysterious.…”

Section: Discussionmentioning

confidence: 99%

Cotton miR393-TIR1 Module Regulates Plant Defense Against Verticillium dahliae via Auxin Perception and Signaling

Shi

Wang

et al. 2022

Front. Plant Sci.

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Plant auxin is essential in plant growth and development. However, the molecular mechanisms of auxin involvement in plant immunity are unclear. Here, we addressed the function of the cotton (Gossypium hirsutum) miR393-TIR1 module in plant defense against Verticillium dahliae infection via auxin perception and signaling. GhTIR1 was directedly cleaved by ghr-miR393 according to mRNA degradome data, 5′-RACE analysis, and a GUS reporter assay. Ghr-miR393 knockdown significantly increased plant susceptibility to V. dahliae compared to the control, while ghr-miR393 overexpression and GhTIR1 knockdown significantly increased plant resistance. External indole-3-acetic acid (IAA) application significantly enhanced susceptibility to V. dahliae in ghr-miR393 knockdown and control plants compared to mock treatment, and only slightly increased susceptibility in overexpressing ghr-miR393 and GhTIR1-silenced plants. Application of external PEO-IAA (an auxin antagonist) had a contrary trend with IAA application. Based on yeast two-hybrid and bimolecular fluorescence complementation assays, GhTIR1 interacted with GhIAA14 in the nucleus, and GhIAA14 knockdown reduced plant resistance to V. dahliae infection. The results suggested that the ghr-miR393-GhTIR1 module regulates plant defense via auxin perception and signaling. Additionally, simultaneous knockdown of GhTIR1 and GhICS1 significantly increased plant susceptibility to V. dahliae compared to the control, indicating that salicylic acid (SA) accumulation is vital for the ghr-miR393-GhTIR1 module to regulates plant resistance. Transcriptome data also demonstrated that GhTIR1 knockdown significantly downregulated expression of auxin-related genes and upregulated expression of SA-related genes. Overall, the ghr-miR393-GhTIR1 module participates in plant response to V. dahliae infection via IAA perception and signaling partially depending on the SA defense pathway.

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Streptomyces Strains Promote Plant Growth and Induce Resistance Against Fusarium verticillioides via Transient Regulation of Auxin Signaling and Archetypal Defense Pathways in Maize Plants

Abstract: Graphical AbstractStreptomyces strains promote plant growth and induce resistance against Fusarium verticillioides via transient regulation of auxin signaling and archetypal defense pathways in plants.

Cited by 17 publications

References 60 publications

Wheat Seed Coating with Streptomyces sp. Strain DEF39 Spores Protects against Fusarium Head Blight

Wheat Seed Coating with Streptomyces sp. Strain DEF39 Spores Protects against Fusarium Head Blight

Combatting Sugar Beet Root Rot: Streptomyces Strains’ Efficacy against Fusarium oxysporum

Cotton miR393-TIR1 Module Regulates Plant Defense Against Verticillium dahliae via Auxin Perception and Signaling

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