Plant Diseases Caused by Fungi

Agrios, George N.

doi:10.1016/b978-0-12-044563-9.50015-3

Cited by 20 publications

(20 citation statements)

References 213 publications

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“…lolii is relatively poorly understood, but has been assumed to be very similar to P. coronata f. sp. avenae, based on morphology and specialization on the same alternate host (Simons, 1970;Agrios, 1997). Urediniospores contain two haploid nuclei (dikaryotic), which may be genetically distinct, depending on the previous occurrence of meiotic and mitotic recombination (Allen, 1930).…”

Section: Biology Of the Crown Rust Pathogen Of Ryegrasses First Obsermentioning

confidence: 99%

Biology and Genetics of Crown Rust Disease in Ryegrasses

et al. 2010

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The most serious foliar disease of perennial ryegrass (Lolium perenne L.) is crown rust (caused by Puccinia coronata Corda f.sp. lolii Brown). Progress in resistance breeding using recurrent selection has been slow, due to lack of genetic knowledge. Puccinia coronata is a basidiomycete fungus with a complex life‐cycle involving both asexual and sexual reproductive modes. Pathotype variation may exist, but confirmation is complicated by the outbreeding nature of the host grass and consequent intrapopulation diversity. Qualitative and quantitative resistance mechanisms may hence be due to either major resistance genes responding to mixed pathogen populations, or minor (quantitative) resistance genes. Advances in molecular biology have permitted analysis of both host and pathogen genetics. Development of pathogen‐derived simple sequence repeat (SSR) genetic markers allowed detailed analysis of genetic variation, as well as generation of homogenized inoculum for detailed trait‐dissection studies. Multiple genomic regions were identified as containing quantitative trait loci (QTLs) for pathogen resistance, and specific single nucleotide polymorphism (SNP) markers for defense response (DR) and disease resistance (R) genes have been evaluated for QTL co‐location. The current knowledge status of the crown rust pathogen and genetics of host resistance is reviewed, as well as future prospects for facilitated rust resistance breeding.

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Section: Biology Of the Crown Rust Pathogen Of Ryegrasses First Obsermentioning

confidence: 99%

Biology and Genetics of Crown Rust Disease in Ryegrasses

et al. 2010

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“…The Cochliobolus species are common pathogens of monocotyledons, which includes important crop species such as rice, maize and oat (Agrios, 1997). Cochliobolus (anamorph Bipolaris ) species are true fungi of the Ascomycota .…”

Section: Cochliobolus Speciesmentioning

confidence: 99%

Host‐selective toxins as agents of cell death in plant–fungus interactions

Markham

Hille

2001

Molecular Plant Pathology

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Summary Host‐selective toxins are known determinants of compatibility in plant–fungus interactions and provide a powerful model for understanding the specificity of these associations. The identification of genes required for toxin biosynthesis has shown that the genes are unique to the toxin producing species and are clustered in complex loci. These loci may have been acquired by horizontal gene transfer. Many, if not all, host‐selective toxins act by disrupting biochemical processes and in several cases the resulting cell death has the characteristics of programmed cell death. This ability to make dead tissue from living has enabled these facultative saprophytic fungi to become plant pathogens.

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“…In the early stages of infection, the symptoms appear as small, circular, sunken spots, which resemble indentations caused by blunt circular objects. As the fruit softens, the spots enlarge, and their central portion becomes dark and slightly roughened [1].…”

Section: Introductionmentioning

confidence: 99%

Detection and characterization of theGloeosporium gloeosporioidesgrowth inhibitory compound iturin A fromBacillus subtilisstrain KS03

Cho

Lee

Jin

et al. 2003

FEMS Microbiology Letters

117

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The Bacillus subtilis strain KS03 was isolated, and identified as a biological control agent that inhibits the anthracnose disease fungus Gloeosporium gloeosporioides. The antifungal compound was purified from its culture broth through butanol extraction, diethylaminoethyl (DEAE) Sepharose CL-6B chromatography, and preparative thin layer chromatography. Tandem mass spectrometric analyses (MS/MS), with matrix-assisted laser desorption ionization (MALDI) time-of-fight/time-of-flight (TOF/TOF) mass spectrometry, showed that the antifungal compound was iturin A, a cyclic lipopeptide antibiotic. The major compound, with a molecular mass of 1042 Da, was identified as iturin A(2).

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Plant Diseases Caused by Fungi

Cited by 20 publications

References 213 publications

Biology and Genetics of Crown Rust Disease in Ryegrasses

Biology and Genetics of Crown Rust Disease in Ryegrasses

Host‐selective toxins as agents of cell death in plant–fungus interactions

Detection and characterization of theGloeosporium gloeosporioidesgrowth inhibitory compound iturin A fromBacillus subtilisstrain KS03

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