Contribution of cell wall degrading enzymes to pathogenesis of <i>Fusarium graminearum</i>: a review

Kikot, Gisele Eleonora; Hours, Roque Alberto; Alconada, Teresa M.

doi:10.1002/jobm.200800231

Cited by 207 publications

(151 citation statements)

References 114 publications

Supporting

Mentioning

145

Contrasting

Unclassified

Order By: Relevance

“…12,[22][23][24][25] In addition, various cell wall depolymerases at the infection site are also needed by some pathogenic fungi. 26 In particular, appressoria and associated melanized cell wall structures are critical for penetration of host cells.…”

Section: Infection Structures Of Pathogenic Fungimentioning

confidence: 99%

Autophagy vitalizes the pathogenicity of pathogenic fungi

Liu

Gao

et al. 2012

Autophagy

View full text Add to dashboard Cite

Section: Infection Structures Of Pathogenic Fungimentioning

confidence: 99%

Autophagy vitalizes the pathogenicity of pathogenic fungi

Liu

Gao

et al. 2012

Autophagy

View full text Add to dashboard Cite

“…The hydrolytic enzymes of pathogens are important contributors to plant pathogenesis through degradation of host macromolecules and in some cases through detoxification of secondary metabolites (Morrissey and Osbourn, 1999;Kikot et al, 2009). Carbohydrate active enzymes can degrade plant cell wall polymers to permit the pathogen to invade plant tissue and to provide the pathogen with nutrients (Walton, 1994;Hématy et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

A Phytophthora sojae Glycoside Hydrolase 12 Protein Is a Major Virulence Factor during Soybean Infection and Is Recognized as a PAMP

et al. 2015

View full text Add to dashboard Cite

We identified a glycoside hydrolase family 12 (GH12) protein, XEG1, produced by the soybean pathogen Phytophthora sojae that exhibits xyloglucanase and b-glucanase activity. It acts as an important virulence factor during P. sojae infection but also acts as a pathogen-associated molecular pattern (PAMP) in soybean (Glycine max) and solanaceous species, where it can trigger defense responses including cell death. GH12 proteins occur widely across microbial taxa, and many of these GH12 proteins induce cell death in Nicotiana benthamiana. The PAMP activity of XEG1 is independent of its xyloglucanase activity. XEG1 can induce plant defense responses in a BAK1-dependent manner. The perception of XEG1 occurs independently of the perception of ethylene-inducing xylanase. XEG1 is strongly induced in P. sojae within 30 min of infection of soybean and then slowly declines. Both silencing and overexpression of XEG1 in P. sojae severely reduced virulence. Many P. sojae RXLR effectors could suppress defense responses induced by XEG1, including several that are expressed within 30 min of infection. Therefore, our data suggest that PsXEG1 contributes to P. sojae virulence, but soybean recognizes PsXEG1 to induce immune responses, which in turn can be suppressed by RXLR effectors. XEG1 thus represents an apoplastic effector that is recognized via the plant's PAMP recognition machinery.

show abstract

“…It is appropriate to note that the virulence of phytopathogenic fungi depends on environmental conditions favorable to their multiplication. For example, F. graminearum must synthesize enzymes and proteins that degrade the cell wall as well as generate and release mycotoxins [32]. Once degradation of the cell wall begins, the damage increases.…”

Section: Discussionmentioning

confidence: 99%

Responses of Maize Landrace Seedlings to Inoculations of Fusarium spp.

Briones-Reyes¹,

Castillo-González²,

León-García-de-Alba³

et al. 2017

OALib

View full text Add to dashboard Cite

To assess the reaction of maize landrace seedlings to inoculations of Fusarium spp. derived from different geographic origins, inoculations were performed to substrates in which seeds were germinated, and the severity of damage and the degree of resistance and/or tolerance at the seedling stage were later evaluated. In this study, 57 populations of maize were collected in the states of Oaxaca, Puebla, Tlaxcala, Guerrero and Estado de Mexico, Mexico, and at same time five sources of Fusarium spp. inoculum were obtained. The maize collection and inocula were then evaluated in a bi-factorial arrangement of treatments in a randomized complete block design with four replications. Significant differences were observed in the virulence of the isolates from each geographic region (p < 0.01). The inoculum consisting of isolates from Estado de Mexico proved to be the most virulent, whereas the inoculum from the state of Guerrero caused the least amount of damage to maize seedlings. The length of the roots and aerial portions of the seedlings were reduced due to the effect of the pathogen in comparison with seedlings that emerged in the substrate without inocula. The maize populations responded differently to the pathogen depending on its geographic origin, as the maize plants expressed different amounts of damage caused by the various inocula to which they were subjected. No direct relationship was observed between the virulence of the inoculum and the resistance/tolerance to the disease of populations from the same origin; in some cases, such as that of Tlaxcala, pathogens of the same origin caused more damage to maize from that region.

show abstract

Contribution of cell wall degrading enzymes to pathogenesis of Fusarium graminearum: a review

Cited by 207 publications

References 114 publications

Autophagy vitalizes the pathogenicity of pathogenic fungi

Autophagy vitalizes the pathogenicity of pathogenic fungi

A Phytophthora sojae Glycoside Hydrolase 12 Protein Is a Major Virulence Factor during Soybean Infection and Is Recognized as a PAMP

Responses of Maize Landrace Seedlings to Inoculations of Fusarium spp.

Contact Info

Product

Resources

About