Plant-Fungal Interactions and Plant Disease

Knogge, Wolfgang

doi:10.1007/978-1-4899-1707-2_7

Cited by 3 publications

(2 citation statements)

References 211 publications

(191 reference statements)

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“…The effect of fungus–plant host interaction results from the establishment of a balance between fungal virulence and plant resistance [85,86,87,88]. Disturbance of the balance (resulting from a lowered plant self-protection ability or increased fungal virulence) leads to development of disease [89,90,91,92].…”

Section: The Biological Role Of (1→3)-α-d-glucansmentioning

confidence: 99%

A Report on Fungal (1→3)-α-d-glucans: Properties, Functions and Application

et al. 2019

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The cell walls of fungi are composed of glycoproteins, chitin, and α- and β-glucans. Although there are many reports on β-glucans, α-glucan polysaccharides are not yet fully understood. This review characterizes the physicochemical properties and functions of (1→3)-α-d-glucans. Particular attention has been paid to practical application and the effect of glucans in various respects, taking into account unfavourable effects and potential use. The role of α-glucans in plant infection has been proven, and collected facts have confirmed the characteristics of Aspergillus fumigatus infection associated with the presence of glucan in fungal cell wall. Like β-glucans, there are now evidence that α-glucans can also stimulate the immune system. Moreover, α-d-glucans have the ability to induce mutanases and can thus decompose plaque.

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Section: The Biological Role Of (1→3)-α-d-glucansmentioning

confidence: 99%

A Report on Fungal (1→3)-α-d-glucans: Properties, Functions and Application

et al. 2019

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“…Como no ocasionan la degradación total del tejido infectado se denominan biotrofos. Por el contrario, los hongos facultativos o necrotrofos no necesitan tejido vivo para completar su ciclo vital y suelen producir toxinas y enzimas hidrolíticas que permiten la degradación del tejido infectado y el rápido avance de la infección (Jackson y Taylor, 1996;Knogge, 1998;Yoder et al, 2001).…”

Section: Introductionunclassified

Identificación y caracterización de la ruta mediada por la proteína G heterotrimérica de Arabidopsis thaliana en la respuesta inmune

Cerezo¹

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Plant resistance to necrotrophic fungi Plectosphaerella cucumerina is genetically complex and depends on the interplay of different signalling pathways Sanchez-Vallet et al, 2010). Among others, the heterotrimeric G protein complex has a relevant role. The G protein that is formed by three subunits (Gα, Gβ and Gγ) is a pleiotropic regulator of immune responses to different types of pathogens and developmental issues (Temple and Jones, 2007).Throughout the Thesis, we have demonstrated that Arabidopsis' functional monomer formed by the Gβ and Gγ1/Gγ2 subunits is a key regulator of defense response, as null mutants (agb1 and agg1 agg2) are equally hypersusceptible to P. cucumerina infection. In addition we have identified several AGB1 aminoacids (Q102, T188 y R235) essentials to interact with specific effectors during the regulation of immune response (Jiang et al, sent).To determine the molecular basis of heterotrimeric G protein mediated resistance we have performed a microarray analysis with agb1-1 and wild type Col-0 plants before and after P. cucumerina challenge. A deep and exhaustive comparative transcriptomical analysis of these plants revealed that AGB1 mediated resistance does not rely on salicilic acid (SA), ethylene (ET), jasmonates (JA), abscisic acid (ABA) or triptophan derived metabolites biosynthesis. However the analysis revealed that a significant number of cell wall related genes are misregulated in the agb1 mutant after pathogen challenge when compared to wild-type plants. The analysis of cell wall composition and structure showed similar cell wall alterations between agb1 and agg1 agg2 mutants that are different from those of wild-type plants, so far the mutants present a significant reduction in xylose levels. All these results suggest that heterotrimeric G protein may regulate immune response through modifications in the cell wall composition/structure (Delgado-Cerezo et al, 2011). The characterization of Heterotrimeric G protein interactome revealed highly connected interactions between the G-protein core and proteins involved in cell wall composition or structure (Klopffleisch et al, 2011). To test the role in immunity of several effectors identified above, we have performed resistance analysis of corresponding null mutants against P. cucumerina. In order to characterize AGB1 mediated signalling pathway and identify additional effectors involved in AGB1-mediated immune response against P. cucumerina, we have performed a screening to isolate mutants with suppression of agb1 phenotype. One of the mutants, named sgb10, has been characterized during the Thesis. The mutant shows constitutive expression of SA, JA+ET-mediated defense signaling pathways to suppres agb1 hypersusceptibility. SGB10 and AGB1 proteins seem to be part of independent pathways in immunity, however its function during development remains unclear. At present, we have mapped the sgb10 mutation between At3g55010 and At3g56408 genes. This region contains Molecular Plant • Pages 1-17,

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Genetics of Phytopathology: Phytopathogenic Fungi: Genetic Aspects of Host-Pathogen Interaction

Tudzynski

2000

Progress in Botany

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Plant-Fungal Interactions and Plant Disease

Cited by 3 publications

References 211 publications

A Report on Fungal (1→3)-α-d-glucans: Properties, Functions and Application

A Report on Fungal (1→3)-α-d-glucans: Properties, Functions and Application

Identificación y caracterización de la ruta mediada por la proteína G heterotrimérica de Arabidopsis thaliana en la respuesta inmune

Genetics of Phytopathology: Phytopathogenic Fungi: Genetic Aspects of Host-Pathogen Interaction

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