Reaction of Some Coffea arabica Genotypes to Strains of Colletotrichum kahawae, the Cause of Coffee Berry Disease

Omondi, Chrispine O.; Ayiecho, P.O.; Mwang’ombe, A. W.; Hindorf, H.

doi:10.1111/j.1439-0434.2000.tb04626.x

Cited by 16 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an approach enabled the Coffee Research Foundation (Kenya) to produce cv. Ruiru 11, an Arabica coffee cultivar resistant to Kenyan C. kahawae isolates (Omondi et al 2000).…”

Section: Resultsmentioning

confidence: 99%

“…CBD affects green berries, causing premature fruit drop and mummified or damaged fruits. Genetic diversity in Arabica coffee is recognized regarding resistance to CBD, enabling partial control of the disease (Omondi et al 2000). Genetic and pathogenic diversity within C. kahawae was reported in Eastern and Central Africa (Derso and Waller 2003; Bridge et al 2008), but no such information is available for Angola (Rodrigues et al 1991).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization ofColletotrichum kahawaeIsolates Causing Coffee Berry Disease in Angola

Manuel¹,

Talhinhas²,

Várzea³

et al. 2010

Journal of Phytopathology

View full text Add to dashboard Cite

Coffee Berry Disease, caused by Colletotrichum kahawae, is a major limitation for Arabica coffee cultivation in Africa and for which genetic control is only partially effective. As part of the effort to re-launch coffee cultivation in Angola, our aim was to study the diversity of this pathogen and so contribute to more effective breeding for disease resistance. A collection of 30 C. kahawae isolates showed limited diversity in genetic and colony characters. However, some isolates are distinct, suggesting that breeding for disease resistance in Angola should be dependent on an adequate knowledge of the diversity of local and neighbouring C. kahawae isolates. Analysis of C. kahawae nrDNA nucleotide sequences showed distinct lineages clustering within the broad diversity of C. gloeosporioides, prompting further studies aimed at understanding the origin and pathogenic specialization of C. kahawae.

show abstract

“…Such an approach enabled the Coffee Research Foundation (Kenya) to produce cv. Ruiru 11, an Arabica coffee cultivar resistant to Kenyan C. kahawae isolates (Omondi et al 2000).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization ofColletotrichum kahawaeIsolates Causing Coffee Berry Disease in Angola

Manuel¹,

Talhinhas²,

Várzea³

et al. 2010

Journal of Phytopathology

View full text Add to dashboard Cite

show abstract

“…The observed penetration of cork barrier might be due to the ability of the fungus to overcome the resistance mechanisms, or that particular genotype was not able to respond adequately. This observation raises the concern over the possibility of existence or development of races of pathogen, although Omondi et al (2000) explained the current variation observed in Kenya as due to aggressiveness. Hammond and Lewi s (1987) howev er, observ ed penetration of a barrier in one variety of Brassica napus var oleifera by an aggressive isolate but was arrested in the second cycle of resistance reactions.…”

Section: Discussionmentioning

confidence: 99%

Sensitive response and resistance to bery disease (<i>Colletotrichum kahawae</i>) of two coffee varieties (Coffea arabica and C. canephora) : histological comparisons of interactions.

Gichuru¹

2009

Agronomie Africaine

View full text Add to dashboard Cite

Seedling hypocotyls and attached green coffee berries of 11 Coffea arabica varieties and a Robusta coffee cultivar, with different levels of resistance to coffee berry disease (Colletotrichum kahawae), were examined under a microscope for differences in the development of infections caused by single-conidium isolates of the fungus and the response by the host tissu. As compared to susceptibility, resistance was characterised by fewer infection sites, slower and distorted fungal growth, as well as cytoplasmic changes in host cells. This resulted in plant cell death, hypersensitive reaction, pathogen death and the formation of scabs and cork barriers of various appearances. It was concluded that, under favourable environmental conditions, mechanisms that slow or hinder the activity of the pathogen in order to allowing full development of cork barriers, were the most important in determining resistance. The possibility of using types of scabs and barriers to discriminate between categories of host resistance and pathogen aggressiveness was suggested.

show abstract

“…(2000) found that 44 East African isolates of C. kahawae (42 from Kenya, one from Ethiopia and one from Malawi) all belonged to the same VCG, except for one white sector mutant. Further analysis of C. kahawae isolates with VNTR primers, simple repetitive sequence fingerprinting primers and AFLP shows almost no variability within the main group, indicating a virtually clonal population, although different pathogenic strains are known to occur (Omondi et al., 2000). Again, the isolates from Cameroon differed in their AFLP patterns.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the recent evolution of C. kahawae , pathogenic variability has been found in the Kenyan population (Omondi et al., 2000), and strains resistant to fungicides had soon developed when these chemicals were used for control (Ramos and Kamidid, 1982; Mwang’ombe, 1994). Small differences between populations from East and West Africa have also been detected using vegetative compatibility techniques (Bella‐Manga et al., 2001; Varzea et al., 2002).…”

Section: Introductionmentioning

confidence: 99%

Variability of Colletotrichum kahawae in Relation to Other Colletotrichum Species from Tropical Perennial Crops and the Development of Diagnostic Techniques

Bridge¹,

Waller²,

Davies³

et al. 2008

Journal of Phytopathology

View full text Add to dashboard Cite

Twenty-six isolates of Colletotrichum kahawae, the causal agent of coffee berry disease, from coffee in Africa, and 25 isolates, mostly of Colletotrichum gloeosporioides, from coffee and other tropical perennial crops, were examined for the ability to metabolize citrate and tartrate and their molecular genetic variability was assessed using restriction fragment length polymorphisms (RFLP) and variable number tandem repeats (VNTR). Twenty-four isolates of C. kahawae were also assessed using amplified fragment length polymorphisms (AFLP). Vegetative compatibility within a collection of nine isolates, including two of C. gloeosporioides was also assessed. All isolates of C. kahawae from across Africa failed to metabolize citrate or tartrate, but all other isolates metabolized one or both. Colletotrichum kahawae isolates also showed minimal variability using the molecular techniques with two isolates from Cameroon showing slightly different banding patterns in RFLP analysis. All other isolates had variable VNTR and RFLP banding patterns. AFLP analysis failed to detect variability within 12 isolates from Kenya, but did detect differences between isolates from other countries. Five isolates from Kenya were vegetatively compatible but differed from two from Cameroon and from two C. gloeosporioides isolates. Results demonstrate some geographic variability within C. kahawae isolates, although this is small, probably due to the relatively young age of C. kahawae populations. The biochemical and molecular techniques used showed clear differences from other Colletotrichum isolates, and can be used to distinguish the species. Lack of citrate and tartrate metabolism provides a readily applicable diagnostic method.

show abstract

Reaction of Some Coffea arabica Genotypes to Strains of Colletotrichum kahawae, the Cause of Coffee Berry Disease

Cited by 16 publications

References 4 publications

Characterization ofColletotrichum kahawaeIsolates Causing Coffee Berry Disease in Angola

Characterization ofColletotrichum kahawaeIsolates Causing Coffee Berry Disease in Angola

Sensitive response and resistance to bery disease (<i>Colletotrichum kahawae</i>) of two coffee varieties (Coffea arabica and C. canephora) : histological comparisons of interactions.

Variability of Colletotrichum kahawae in Relation to Other Colletotrichum Species from Tropical Perennial Crops and the Development of Diagnostic Techniques

Contact Info

Product

Resources

About