Infection process and identity of the hemibiotrophic anthracnose fungus (Colletotrichum destructivum) from cowpea (Vigna unguiculata)

Latunde‐Dada, A. O.; O’Connell, Richard J.; Nash, C.; Pring, R. J.; Lucas, John A.; Bailey, J. A.

doi:10.1016/s0953-7562(96)80226-7

Cited by 67 publications

(82 citation statements)

References 11 publications

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“…Consistent with previous data (Gomes et al, 2009), the interaction between C. acutatum-olive fruits occurred only through cuticle by appressoria structure formation. Penetration through stomata or direct penetration by germ tubes or hyphal tips, without appressoria, was not observed in this pathosystem, as it has been reported in bean cultivars (Jerba et al, 2005), and on cowpea leaves (Latunde-Dada et al, 1996). Results from colonization process showed that the severity of infection was greater on the C. acutatum-susceptible ('Galega') than on C. acutatum-resistant ('Picual') fruits.…”

Section: Discussionsupporting

confidence: 54%

“…Smith et al, (1999) reported that acervuli sporulation on C. dematium-cowpea stems pathosystem only became visible approximately 80 hai and on leaves brown lesions became visible only 100 hai. Latunde-Dada et al, (1996) reported acervuli sporulation in C. destructivum-cowpea pathosystem 120 hai. On C. graminicola-Agrostis palustris and C. graminicola-Lolium perenne pathosystems the acervuli sporulation appeared within 72 and 96 hai, respectively (Khan and Hsiang, 2003).…”

Section: Discussionmentioning

confidence: 99%

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Infection Process of Olive Fruits by Colletotrichum acutatum and the Protective Role of the Cuticle and Epidermis

Gomes¹,

Bacelar²,

Martins-Lopes³

et al. 2012

JAS

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Colletotrichum acutatum is a serious concern for the Portuguese oliviculture and food industry, due to both olive oil yield and quality decrease. While the organism's phytopathogenic potential has been well documented, the pathogen adhesion and colonization process in olives remain poorly understood. This paper reports experiments conducted on C. acutatum-susceptible, C. acutatum-moderately resistant and C. acutatum-resistant olive fruits during infection process, in two consecutively years, to identify the physical differences related to the host cuticle promoting resistance and susceptibility to C. acutatum. Cuticle thickness, perimeter and area of epidermal cells of 'Galega' (susceptible), 'Cobrançosa' (moderate-resistant) and 'Picual' (resistant) fruits were measured. Here, we also describe the colonization process of olive fruits by C. acutatum. To achieve this goal olive fruits 102 from 'Galega', 'Cobrançosa' and 'Picual' were inoculated in a field trial with an aqueous suspension of C. acutatum (1x10 6 spores ml -1 ) under suitable humidity and temperature conditions. Light, fluorescent and scanning electron microscopy were used to view olive fruit sections. Significant differences were observed among the parameters studied: cuticle thickness, perimeter and area of olive fruit epidermal cells. The C. acutatum-resistant ('Picual') fruits showed highest mean values for each parameter in both years. Pathogen ultrastructures, such as spores, germ tube, and appressoria were clearly observed using different microscopy techniques. Acervuli sporulation was observed only 192 hours after inoculation in C. acutatum-susceptible ('Galega') fruits.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Infection Process of Olive Fruits by Colletotrichum acutatum and the Protective Role of the Cuticle and Epidermis

Gomes¹,

Bacelar²,

Martins-Lopes³

et al. 2012

JAS

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“…However, as indicated by Biggs (1986), the presence of wound periderm is more critical for inhibition of the pathogen than primary ligno-suberized tissues possibly including the accumulation of phenolic compounds. These aspects are also derived from the fact that anthracnose pathogens of some host plants including chili pepper are hemibiotrophs which develop secondary necrotrophic hyphae (Kim et al, 2005;Latunde-Dada et al, 1996;O'Connell et al, 1985), possibly overcoming the physico-chemical modifications prior to the wound periderm formation. It was also clearly shown in our study that a few remaining fungal hyphae appeared to be obstructed in their growth and deviated in their orientation in confrontation with the cell walls of such modified cells in the process of wound periderm formation.…”

Section: Discussionmentioning

confidence: 99%

Effect of Delayed Inoculation After Wounding on the Development of Anthracnose Disease Caused by Colletotrichum acutatum on Chili Pepper Fruit

Kim¹,

Kim²,

Kim³

et al. 2008

The Plant Pathology Journal

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Detached chili pepper fruits were inoculated with the conidial suspension of Colletotrichum acutatum JC-24 simultaneously (simultaneous inoculation, SI) and at delayed time (delayed inoculation, DI) after wounding with (delayed wound inoculation, DWI) or without additional wounding (delayed non-wound inoculation, DNI) at the inoculation time. Disease severity was significantly lowered by DNI, compared to SI. By DNI, the disease reduction rates were proportional with the length of delayed time, and greater at the high temperature range (18, 23 and 28 o C) than at the low temperature (13 o C) tested. DWI was also effective in reducing the disease severity especially at 18 o C; however, its effectiveness was lower than for DNI. In light microscopy, parenchyma cells at the wounding sites were modified structurally, initially forming new cell walls crossing cytoplasm, enlarged with multiple periclinal cell divisions, and finally layered like wound periderms. In DWI, the above structural modifications occurred, showing the restriction of the fungal invasion by the cell walls in enlarged modified cells, while no definite cellular modifications were found with proliferation of fungal hyphae in SI. Sclerenchyma-like cells with thickened cell walls were proliferated around the wounding sites, which were partially dissolved by DWI, probably leading to some disease development. All of these results suggest that the decline of the anthracnose disease in pepper fruit by the delayed inoculations may be derived from the structural modifications related to the healing processes of the previous wound inflicted on the tissues.

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“…Cowpea (Vigna unguiculata (L.) Walp) is a leguminous, annual grain crop in the bean family (Fabaceae/Leguminosae), with high degree of variation in growth habit, leaf shape, flower colour and seed size and colour, cultivated mostly in the humid tropics of the globe for its seeds, as a vegetable crop, green manure, fodder, as a cash crop and or cover crop [1]- [4]. The crop's haulms are also valuable source of livestock protein [5].…”

Section: Introductionmentioning

confidence: 99%

Situation of Biofungicides Reconnaissance, a Case of Anthracnose Disease of Cowpea

Ikechukwu¹,

Barriuso-Vargas²

2014

AJPS

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Plant extracts have long been used in commercial agriculture as anti-microbial tools in food safety applications. These offer growers and agrobiologists many unique benefits which include their eco-friendliness. This work reviews the situation of Biofungicides reconnaissance in reference to fungal disease of cowpea. Twenty different pathogens were associated with various fungal diseases of cowpea and, only the species of Colletotrichum was found to have the virulence and propensity of afflicting a 100% infection on a single susceptible cowpea crop. Plant families under the affliction of Colletotrichum were analyzed. The different forms of botanicals so far availed for use as potential biofungicidal were identified. Eighteen plant families were found to represent the entire plants and plant materials agrobiologically screened within a range of thirteen years and found to habour large spectra of species containing substances of biofungicidal potentials. Current position in the use of Botanicals to combat agricultural pests and disease is 7% of the total cowpea disease management options.

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Infection process and identity of the hemibiotrophic anthracnose fungus (Colletotrichum destructivum) from cowpea (Vigna unguiculata)

Cited by 67 publications

References 11 publications

Infection Process of Olive Fruits by Colletotrichum acutatum and the Protective Role of the Cuticle and Epidermis

Infection Process of Olive Fruits by Colletotrichum acutatum and the Protective Role of the Cuticle and Epidermis

Effect of Delayed Inoculation After Wounding on the Development of Anthracnose Disease Caused by Colletotrichum acutatum on Chili Pepper Fruit

Situation of Biofungicides Reconnaissance, a Case of Anthracnose Disease of Cowpea

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