Evidence of cork barrier formation as a resistance mechanism to berry disease (Colletotrichum coffeanum) in arabica coffee

Masaba, D. M.; Vossen, H. A. H. Van Der

doi:10.1007/bf01976423

Cited by 19 publications

(19 citation statements)

References 16 publications

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“…Masaba and Helderman (1985) also found that hypocotyls of Rume Sudan and SL 28 formed compounds that inhibited the conidia germination and the mycelial growth of C. kahawae, 2 days after the inoculation. According to Masaba and van der Vossen (1982), the resistance to CBD in Arabica coffee may, to a certain extent, be based on the formation of cork barriers. Phellogen was rapidly formed in some cells below the infection site and the progress of the fungal invasion was blocked by a complete barrier of suberised cells.…”

Section: Cytological and Biochemical Resistance Mechanismsmentioning

confidence: 99%

“…These cork barriers corresponded macroscopically to the scab lesion, the common macroscopic expression of resistance to CBD (Gichuru, 1997). Such a resistance mechanism is likely to be stable (race-nonspecific) and depends apparently on actively metabolizing plant tissues (Masaba and van der Vossen, 1982;Masaba and Waller, 1992). In fact, cork barrier formation was observed in both attached berries and hypocotyls but not in detached berries, which quickly lost their ability to respond to C. kahawae infection.…”

Section: Cytological and Biochemical Resistance Mechanismsmentioning

confidence: 99%

See 1 more Smart Citation

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

Silva

Várzea

Guerra‐Guimarães

et al. 2006

Braz. J. Plant Physiol.

188

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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Section: Cytological and Biochemical Resistance Mechanismsmentioning

confidence: 99%

Section: Cytological and Biochemical Resistance Mechanismsmentioning

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.

188

147

View full text Add to dashboard Cite

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“…Instead, host resistance appears to be largely based on the rapid formation of a cork barrier in the pericarp of the developing fruit or cortex of hypocotyl stems distal from the initial infection site, which eVectively prevents the pathogen from further invading healthy tissue (Masaba and Van der Vossen 1982). Such barriers are usually absent or incomplete in susceptible host plants.…”

Section: Resultsmentioning

confidence: 97%

“…Like most Colletotrichum species (Bailey et al 1992), C. kahawae is a hemibiotrophic pathogen with a two-phase infection process, one short biotrophic (Chen et al 2004) followed by a destructive necrotrophic phase in susceptible host plants (Masaba and Van der Vossen 1982). Early response to infection in resistant hosts was observed to include rapid cell death (Anon 2005), but it is not necessarily similar to the hypersensitive response, which is so characteristic of biotrophic pathogens such as coVee leaf rust (Hemileia vastatrix).…”

Section: Resultsmentioning

confidence: 99%

Additional evidence for oligogenic inheritance of durable host resistance to coffee berry disease (Colletotrichum kahawae) in arabica coffee (Coffea arabica L.)

Vossen¹,

Walyaro

2008

Euphytica

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Breeding for host resistance to coVee berry disease (CBD) in arabica coVee (CoVea arabica) was initiated some 35-40 years ago in Kenya, Ethiopia and Tanzania in response to severe CBD epidemics. The release of CBD resistant cultivars to the coVee growers has been in progress since 1985. The resistance of cultivars like Ruiru 11 (Kenya) and Ababuna (and other cvs in Ethiopia) appears to be of a durable nature, since conWrmed cases of a breakdown of host resistance under Weld conditions have not been reported over the past 20 years. Host resistance to the hemibiotrophic fungus Colletotrichum kahawae is of a quantitative nature, but nevertheless can be practically complete in some genotypes of arabica coVee. There is still no consensus on the genetics of CBD resistance, some claiming convincing evidence for oligogenes (1-3 major genes) and others for polygenes determining CBD resistance. Results from genetic studies with germplasm from the centre of genetic diversity for C. arabica in Ethiopia are presented here. These together with the recent identiWcation of molecular markers associated with and the mapping of one major gene, provides additional evidence for oligogenic inheritance of CBD resistance. The development of cultivars combining yield and quality with durable host resistance to CBD has contributed greatly to increased sustainability of arabica coVee production in Africa. It has also considerable relevance to arabica coVee in Latin America and Asia, where CBD is still a quarantine disease but with a risk of becoming endemic one day, just as has happened earlier with coVee leaf rust (Hemileia vastatrix).

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“…Baayen, manuscript in preparation) and intended for localization of pathogens. Similar situations occur in Botrytis cinerea ghost spots of tomato fruits (De Leeuw, 1985) and in coffee resistant to coffee berry disease (Masaba and Van der Vossen, 1982).…”

Section: Discussionmentioning

confidence: 91%

Regeneration of vascular tissues in relation to Fusarium wilt resistance of carnation

Baayen¹

1986

Netherlands Journal of Plant Pathology

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Fusarium wilt-resistant 'Novada' carnations responded both to stem inoculation with a conidial suspension ofFusarium oxysporum f. sp. dianthi or E oxysporum f. sp. lycopersici and to root inoculation by planting in soil infected with E oxysporum f.sp. dianthi by means of a localization mechanism comprising gel formation in the xylem vessels and hyperplasia of adjacent parenchyma cells. Dye translocation experiments showed that xylem transport was limited by the presence of vascular gels, although wilting did not occur. Overcapacity of the vascular system apparently allowed for sufficient water transport to compensate for local vascular dysfunction. Also, vascular regeneration in the hyperplastic tissue next to occluded xylem vessels created new pathways for water transport to compensate for those lost by occlusion. Regeneration of xylem vessels was eventually followed by regeneration of xylem fibers, xylem parenchyma, cambium, and phloem cells.'Early Sam' carnations, susceptible to Fusarium wilt, responded to stem inoculation with E oxysporum f. sp. lycopersiciby similar localization of infection and vascular regeneration. Stem inoculation with E oxysporum f. sp. dianthi, however, resulted in colonization of the xylem vessels followed by lysis of the vascular tissues. Vascular gelation, hyperplasia of parenchyma cells, and vascular regeneration did generally not occur. However, if some hyperplasia occurred in attempted defence, some differentiation of hyperplastic cells into single xylem vessel elements was observed which only rarely resulted in complete vascular regeneration next to colonized xylem. In the absence of hyperplasia, differentiation of medulla parenchyma cells bordering destroyed vascular tissue into xylem vessel elements was even more exceptional. Apparently, vascular regeneration in carnation is a normal defence reaction to fungal invasion.

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Evidence of cork barrier formation as a resistance mechanism to berry disease (Colletotrichum coffeanum) in arabica coffee

Cited by 19 publications

References 16 publications

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

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

Additional evidence for oligogenic inheritance of durable host resistance to coffee berry disease (Colletotrichum kahawae) in arabica coffee (Coffea arabica L.)

Regeneration of vascular tissues in relation to Fusarium wilt resistance of carnation

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