Colonization of Flax Roots and Early Physiological Responses of Flax Cells Inoculated with Pathogenic and Nonpathogenic Strains of
            <i>Fusarium oxysporum</i>

Olivain, Chantal; Trouvelot, Sophie; Binet, Marie‐Noëlle; Cordier, Christelle; Pugin, Alain

doi:10.1128/aem.69.9.5453-5462.2003

Cited by 76 publications

(73 citation statements)

References 72 publications

(60 reference statements)

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“…The first reports on visualization focused on the colonization of the root tissue by either a pathogenic (Olivain and Alabouvette 1999;Olivain et al 2003), or a nonpathogenic Fusarium strain Alabouvette 1997, Olivain et al 2003) of plants growing in nutrient solutions and using electron microscopy. The use of a β-glucuronidase construct allowed quantification of the nonpathogenic F. oxysporum SA70 on roots of tomato plants grown in soil or potting material (Bao et al 2000;Eparvier and Alabouvette 1994).…”

Section: Discussionmentioning

confidence: 99%

Visualization of Interactions Between a Pathogenic and a Beneficial Fusarium Strain During Biocontrol of Tomato Foot and Root Rot

Bolwerk¹,

Lagopodi²,

Lugtenberg³

et al. 2005

MPMI

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The soilborne fungus Fusarium oxysporum f. sp. radicislycopersici causes tomato foot and root rot (TFRR), which can be controlled by the addition of the nonpathogenic fungus F. oxysporum Fo47 to the soil. To improve our understanding of the interactions between the two Fusarium strains on tomato roots during biocontrol, the fungi were labeled using different autofluorescent proteins as markers and subsequently visualized using confocal laser scanning microscopy. The results were as follows. i) An at least 50-fold excess of Fo47over F. oxysporum f. sp. radicis-lycopersici was required to obtain control of TFRR. ii) When seedlings were planted in sand infested with spores of a single fungus, Fo47 hyphae attached to the root earlier than those of F. oxysporum f. sp. radicis-lycopersici. iii) Subsequent root colonization by F. oxysporum f. sp. radicis-lycopersici was faster and to a larger extent than that by Fo47. iv) Under disease-controlling conditions, colonization of tomato roots by the pathogenic fungus was significantly reduced. v) When the inoculum concentration of Fo47 was increased, root colonization by the pathogen was arrested at the stage of initial attachment to the root. vi) The percentage of spores of Fo47 that germinates in tomato root exudate in vitro is higher than that of the pathogen F. oxysporum f. sp. radicis-lycopersici. Based on these results, the mechanisms by which Fo47 controls TFRR are discussed in terms of i) rate of spore germination and competition for nutrients before the two fungi reach the rhizoplane; ii) competition for initial sites of attachment, intercellular junctions, and nutrients on the tomato root surface; and iii) inducing systemic resistance.

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Section: Discussionmentioning

confidence: 99%

Visualization of Interactions Between a Pathogenic and a Beneficial Fusarium Strain During Biocontrol of Tomato Foot and Root Rot

Bolwerk¹,

Lagopodi²,

Lugtenberg³

et al. 2005

MPMI

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“…The investigation of novel functions of active oxygen species (AOS) have revealed that, in addition to arresting pathogen proliferation in planta, AOS are involved in cell wall reinforcement (Olivain et al, 2003) and callose deposition (Huckelhoven et al, 1999). Moreover, they are able to act as signaling molecules (Alvarez et al, 1998;Bolwell et al, 1995;Chamnongpol et al, 1998;Rhee et al, 2010;Tenhaken et al, 1995;Wojtaszek, 1997).…”

Section: Programmed Cell Death (Pcd) Is Ubiquitous In All Organismsmentioning

confidence: 99%

Arabidopsis Cell Death in Compatible and Incompatible Interactions with Alternaria brassicicola

Su’udi

Kim

Park

et al. 2011

Molecules and Cells

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“…Recently, novel functions of AOS have been investigated. Besides arresting pathogen proliferation in planta, AOS are involved in cell wall reinforcement (Olivain et al, 2003), callose deposition (Huckelhoven et al, 1999), and acts to signal molecules in systemic translocation of acquired resistance (Bolwell et al, 1995(Bolwell et al, , 1998Tenhaken et al, 1995;Wojtaszek, 1997;Alvarez et al, 1998;Chamnongpol et al, 1998). Similar to previously known plant defense activators, methyl viologen and mercuric chloride promote oxidative damage and chlorosis-induced plant defense responses (van Loon, 1975;Lund et al, 1993;Strobel and Kuc, 1995).…”

mentioning

confidence: 94%

Glufosinate Ammonium-Induced Pathogen Inhibition and Defense Responses Culminate in Disease Protection in bar-Transgenic Rice

Ahn

2007

Plant Physiol.

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Glufosinate ammonium diminished developments of rice (Oryza sativa) blast and brown leaf spot in 35S:bar-transgenic rice. Pre-and postinoculation treatments of this herbicide reduced disease development. Glufosinate ammonium specifically impeded appressorium formation of the pathogens Magnaporthe grisea and Cochliobolus miyabeanus on hydrophobic surface and on transgenic rice. In contrast, conidial germination remained unaffected. Glufosinate ammonium diminished mycelial growth of two pathogens; however, this inhibitory effect was attenuated in malnutrition conditions. Glufosinate ammonium caused slight chlorosis and diminished chlorophyll content; however, these alterations were almost completely restored in transgenic rice within 7 d. Glufosinate ammonium triggered transcriptions of PATHOGENESIS-RELATED (PR) genes and hydrogen peroxide accumulation in transgenic rice and PR1 transcription in Arabidopsis (Arabidopsis thaliana) wild-type ecotype Columbia harboring 35S:bar construct. All transgenic Arabidopsis showed robust hydrogen peroxide accumulation by glufosinate ammonium. This herbicide also induced PR1 transcription in etr1 and jar1 expressing bar; however, no expression was observed in NahG and npr1. Fungal infection did not alter transcriptions of PR genes and hydrogen peroxide accumulation induced by glufosinate ammonium. Infiltration of glufosinate ammonium did not affect appressorium formation of M. grisea in vivo but inhibited blast disease development. Hydrogen peroxide scavengers nullified blast protection and transcriptions of PR genes by glufosinate ammonium; however, they did not affect brown leaf spot progression. In sum, both direct inhibition of pathogen infection and activation of defense systems were responsible for disease protection in bar-transgenic rice.

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Colonization of Flax Roots and Early Physiological Responses of Flax Cells Inoculated with Pathogenic and Nonpathogenic Strains of Fusarium oxysporum

Cited by 76 publications

References 72 publications

Visualization of Interactions Between a Pathogenic and a Beneficial Fusarium Strain During Biocontrol of Tomato Foot and Root Rot

Visualization of Interactions Between a Pathogenic and a Beneficial Fusarium Strain During Biocontrol of Tomato Foot and Root Rot

Arabidopsis Cell Death in Compatible and Incompatible Interactions with Alternaria brassicicola

Glufosinate Ammonium-Induced Pathogen Inhibition and Defense Responses Culminate in Disease Protection in bar-Transgenic Rice

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