Temporal accumulation patterns of defence response gene transcripts in relation to resistant reactions in oat inoculated withPuccinia graminis

Lin, Kuo Chih; Bushnell, W. R.; Smith, Alan G.; Szabo, Les J.

doi:10.1006/pmpp.1997.0139

Cited by 26 publications

(19 citation statements)

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“…In genotype Pc68/ 5*Starter, the plant cells surrounding the substomatal cavity, where the fungal structures developed, died, resulting in small fungal colonies limited to this area. This type of reaction is characteristic of the hypersensitivity resistance conferred by major genes (Heath 1981;Niks and Dekens 1991;Lin et al 1998). Cell death in cultivars URS 21 plus genotypes 04B7113-1 and 04B7119-2 showed a different pattern, with dead plant cells scattered throughout the area colonized by P. coronata.…”

Section: Discussionmentioning

confidence: 96%

Epidemiological and histological components of crown rust resistance in oat genotypes

et al. 2011

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Crown rust, caused by Puccinia coronata f. sp. avenae, can cause significant damage in all regions where oats (Avena sativa L.) are cultivated. The primary means of controlling crown rust has been through genetic resistance, although in most cases resistance has been quickly overcome by the pathogen. More durable partial or non-specific resistance may possess different mechanisms from those underlying genes with specific effects. We studied the epidemiological and histological components of crown rust resistance with potential use in plant protection. Among the components evaluated, pustule density showed the clearest effect on resistance, while the latent period was not an important component. Cell death associated with the accumulation of autofluorescent and phenolic compounds was common in the resistant genotypes, but temporally distinct for the genotypes studied. Genotype Pc68/5*Starter, which has race-specific resistance, showed rapid cell death that prevented the development of pathogen colonies. Conversely, with cultivar URS 21 and genotypes 04B7113-1 and 04B7119-2, cell death and associated accumulation of autofluorescent and phenolic compounds was delayed until pathogen colonies were already established. Pathogen colonies developed normally in susceptible plants genotypes, and had usually produced sporogenic tissue by 5 days after inoculation. The data suggest that the resistance mechanisms, especially hypersensitivity and phenolic compound production, active in resistant plants are similar but may be differently expressed over time. The temporal variation in the expression of hypersensitivity and phenolic compound production reflects the level of field resistance in these genotypes.

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Section: Discussionmentioning

confidence: 96%

Epidemiological and histological components of crown rust resistance in oat genotypes

et al. 2011

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“…In the cowpea (Vigna unguiculata) / Uromyces vignae pathosystem, specific upregulation of cowpea genes in the resistant cultivar occurred soon after the penetration of the epidermal cell wall by the fungus (Mould et al, 2003). In the cereal rusts Puccinia graminis tritici and P. graminis avenae, activation of defence-related genes was observed in barley (Rostoks et al, 2004) and in oat when haustorial mother cells (HMCs) were formed in almost all infection sites (Lin et al, 1998). In the coffee-H. vastatrix interaction, the haustorium stage may be reached by H. vastatrix between 24-48 hpi (Martins and Moraes 1996;Silva et al, 1999aSilva et al, , 2002.…”

Section: Time-course Of Gene Induction During Coffee Rust Infectionmentioning

confidence: 99%

Coffee resistance to the main diseases: leaf rust and coffee berry disease

Silva

Várzea

Guerra‐Guimarães

et al. 2006

Braz. J. Plant Physiol.

186

147

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Considerable success has been obtained in the use of classical breeding to control economically important plant diseases, such as the coffee leaf rust and the coffee berry disease (CBD). There is a strong consensus that growing genetically resistant varieties is the most appropriate cost effective means of managing plant diseases and is one of the key components of crop improvement. It has also been recognized that a better knowledge of both, the pathogens and the plant defence mechanisms will allow the development of novel approaches to enhance the durability of resistance. After a brief description of concepts in the field of plant disease resistance, we attempt to give a view of the research progress on coffee leaf rust and CBD concerned with the pathogens infection and variability, coffee breeding for resistance and coffee resistance mechanisms. Key words: Coffea, Colletotrichum kahawae, Hemileia vastatrix, coffee breeding, resistance.Resistência do cafeeiro para suas principais doenças: ferrugem alaranjada das folhas e antracnose dos frutos: Sucesso considerável tem sido obtido no uso do melhoramento clássico para o controle de doenças de plantas economicamente importantes, tais como a ferrugem alaranjada das folhas e a antracnose dos frutos do cafeeiro (CBD). Há um grande consenso de que o uso de plantas geneticamente resistentes é o meio mais apropriado e eficaz em termos de custos do controle das doenças das plantas, sendo também um dos elementos chave do melhoramento da produção agrícola. Tem sido também reconhecido que um melhor conhecimento do agente patogênico e dos mecanismos de defesa das plantas permitirá o desenvolvimento de novas abordagens no sentido de aumentar a durabilidade da resistência. Após uma breve descrição de conceitos na área da resistência das plantas às doenças, nesta revisão tentou-se dar uma idéia do progresso na investigação da ferrugem alaranjada do cafeeiro e do CBD relativamente ao processo de infecção e variabilidade dos agentes patogênicos, melhoramento do cafeeiro para a resistência e mecanismos de resistência do cafeeiro. Palavras-chave: Coffea, Colletotrichum kahawae, Hemileia vastatrix, melhoramento do cafeeiro, resistência.

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“…HvPR-1a has been previously shown to be induced by powdery mildew infection in barley (Bryngelsson et al 1994) and Puccinia graminis f.sp. avenae infection in oat (Lin et al 1998). The barley b-1,3-glucanase was a homolog of a wheat gene (GenBank X95647) which was induced in response to infection with the stem rust pathogen Puccinia graminis f.sp.…”

Section: Identification Of Ethylmethanesulfonate (Ems) Induced Nec1 Amentioning

confidence: 99%

Barley necrotic locus nec1 encodes the cyclic nucleotide-gated ion channel 4 homologous to the Arabidopsis HLM1

Rostoks¹,

Schmierer

Mudie³

et al. 2005

Mol Genet Genomics

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Barley homolog of the Arabidopsis necrotic (disease lesion mimic) mutant HLM1 that encodes the cyclic nucleotide-gated ion channel 4 was cloned. Barley gene was mapped genetically to the known necrotic locus nec1 and subsequent sequence analysis identified mutations in five available nec1 alleles confirming barley homolog of Arabidopsis HLM1 as the NEC1 gene. Two fast neutron (FN) induced mutants had extensive deletions in the gene, while two previously described nec1 alleles had either a STOP codon in exon 1 or a MITE insertion in intron 2 which caused alternative splicing, frame shift and production of a predicted non-functional protein. The MITE insertion was consistent with the reported spontaneous origin of the nec1 Parkland allele. The third FN mutant had a point mutation in the coding sequence which resulted in an amino acid change in the conserved predicted cyclic nucleotide-gated ion channel pore region. The expression of two pathogenesis-related genes, HvPR-1a and beta-1,3-glucanase, was elevated in two FN necrotic lines. Ten other members of the barley cyclic nucleotide-gated ion channel gene family were identified and their position on barley linkage map is reported.

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Temporal accumulation patterns of defence response gene transcripts in relation to resistant reactions in oat inoculated withPuccinia graminis

Cited by 26 publications

References 0 publications

Epidemiological and histological components of crown rust resistance in oat genotypes

Epidemiological and histological components of crown rust resistance in oat genotypes

Coffee resistance to the main diseases: leaf rust and coffee berry disease

Barley necrotic locus nec1 encodes the cyclic nucleotide-gated ion channel 4 homologous to the Arabidopsis HLM1

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