Examination of the relationships between vegetative compatibility groups and races in <i>Fusarium oxysporum</i> f.sp. <i>dianthi</i>

Aloi, C.; Baayen, R.P.

doi:10.1111/j.1365-3059.1993.tb02669.x

Cited by 45 publications

(50 citation statements)

References 21 publications

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“…F. proliferatum was recently described as a causal agent of crown and root rot of asparagus [Elmer, 1990]. The latter species was often isolated from carnations in Dutch greenhouses [Aloi and Baayen, 1993]. The temperature requirements of F. proliferatum may explain why it was not isolated from asparagus fields.…”

Section: Discussionmentioning

confidence: 99%

Fungi on roots and stem bases of asparagus in the Netherlands: species and pathogenicity

Blok

Bollen

1995

Eur J Plant Pathol

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A survey was made to identify the most important soilborne fungal pathogens of asparagus crops in the Netherlands. Ten plants were selected from each of five fields with a young (1-4 y) first planting, five fields with an old (6-13 y) first planting and five fields with a young replanting. The analysis included fungi present in the stem base and the roots of plants with symptoms of foot and root rot or showing growth decline without specific disease symptoms. Isolates of each species were tested for pathogenicity to asparagus on aseptically grown plantlets on Knop's agar. Symptoms were caused by Fusarium oxysporum, F. culmorum, Botrytis cinerea, Penicillium verrucosum var. cyclopium, Cylindrocarpon didymum, Phialophora malorum, Phoma terrestris and Acremonium strictum. F. oxysporum was by far the most common species and was isolated from 80% of the plants. Not all of its isolates were pathogenic to asparagus. Symptoms were caused by 67%, 78% and 93% of the isolates obtained from young first plantings, old first plantings and replantings, respectively. F. culmorum was isolated from 31% of the plants. Two other notorious pathogens of asparagus, F. moniliforme and F. proliferatum, did not occur in our samples.Species causing symptoms in the vitro test that were found on more than 5% of the plants were additionally tested for their pathogenicity in pot experiments. F. oxysporum f.sp. asparagi caused severe foot md root rot, significantly reduced root weights and killed most of the plants. F. culmorum caused lesions )n the stem base often resulting in death of the plant. P. terrestris, a fungus only once reported as a 9athogen of asparagus, caused an extensive root rot, mainly of secondary roots that became reddish. The :ungus was isolated in only a few samples and is not to be regarded as an important pathogen in Dutch sparagus crops. P. malorum caused many small brown lesions on the stem base and incidentally also n the upper part of small main roots. This is the first report of its pathogenicity to asparagus. The angus is one of the organisms inciting spear 'rust' and it reduced crop quality rather than crop yield. P. errucosum var. cyclopium and C. didymum did not cause symptoms in pot experiments. Because of its predominance on plants with foot and root rot and its high virulence, F. oxysporum sp. asparagi was considered to be the main soilborne pathogen of asparagus in the Netherlands. Ltroduction'paragus (Asparagus officinalis L.) is one of the tin vegetable crops grown in the southeastern part of the Netherlands. The asparagus produced is almost exclusively white asparagus. In this area, asparagus has been grown for several decades and many growers do not have fresh land available.

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Section: Discussionmentioning

confidence: 99%

Fungi on roots and stem bases of asparagus in the Netherlands: species and pathogenicity

Blok

Bollen

1995

Eur J Plant Pathol

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“…This method has since been used to examine the relationships between F. oxysporum isolates from a wide range of hosts (Correll, 1991) including carnation (Baayen and Kleijn, 1989;Katan et al, 1989;Manicom et al, 1990;Aloi and Baayen, 1993).…”

Section: Fusarium Oxysporum Schlecht Causes Vascular Wiltmentioning

confidence: 99%

“…In particular, the grouping of isolates on the basis of RFLP pattern has been shown to correlate with their vegetative compatibility grouping (Manicom et al, 1990;Manicom and Baayen, 1993). Aloi and Baayen, 1993. More recently, a new DNA polymorphism assay has been developed, known as the random amplified polymorphic DNA (RAPD) assay (Williams et al, 1990). This technique has been applied for strain identification, determination of inheritance patterns and genetic mapping in a wide variety of organisms.…”

Section: Fusarium Oxysporum Schlecht Causes Vascular Wiltmentioning

confidence: 99%

“…The only compatible response observed was that between isolate 106 (representative of VCG C) and isolate WCS 816. VCG C should therefore be formally classified as VCG0021 (Aloi and Baayen, 1993).…”

Section: Fusarium Oxysporum Schlecht Causes Vascular Wiltmentioning

confidence: 99%

“…Unfortunately, it was not possible to perform race identification using differential cultivars (Garibaldi, 1977;Demmink et al, 1987) as the required cultivars are unavailable in Australia. However, the compatibility of isolate 106 (representative of VCG C) with isolate WCS 816 (representative of VCG 0021 and of race 2 (Baayen et al, 1988;Aloi and Baayen, 1993)) suggests that Group C isolates may be race 2 although recent work suggests that VCG0021 may also contain races 5 and 6 (Aloi and Baayen, 1993). Isolate 68 (representative of the other pathogenic group, VCG B) was not compatible with any of the four tester strains suggesting that this group of isolates does not represent race 1,2,4,5,6,or 8 (Aloi and Baayen, 1993).…”

Section: Pathogenicity Testingmentioning

confidence: 99%

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Characterisation ofFusarium oxysporum isolated from carnation in Australia based on pathogenicity, vegetative compatibility and random amplified polymorphic DNA (RAPD) assay

et al. 1996

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Isolates of F. oxysporum collected from symptomless carnation cuttings from Australian carnation growers properties, together with isolates from national collections, were screened for pathogenicity and grouped according to vegetative compatibility and random amplified polymorphic DNA (RAPD) patterns. The collection of 82 Australian isolates sorted into 23 different vegetative compatibility groups (VCGs). Of 69 isolates tested for pathogenicity, 24 were pathogenic to carnations, while the remaining 45 were non-pathogenic. All pathogenic isolates were within two VCGs, one of which was also compatible with an isolate obtained from an international culture collection, and which is known to represent VCG 0021 and race 2. Race status of the two pathogenic VCGs remains unknown. The RAPD assay revealed distinct DNA banding patterns which could distinguish pathogenic from non-pathogenic isolates as well as differentiate between isolates from the two pathogenic VCGs. Fusarium oxysporumSchlecht. causes vascular wilt in a broad range of host plants including carnations (Dianthus caryophyllus L.). This species of Fusarium

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References

2006

The Fusarium Laboratory Manual

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Examination of the relationships between vegetative compatibility groups and races in Fusarium oxysporum f.sp. dianthi

Cited by 45 publications

References 21 publications

Fungi on roots and stem bases of asparagus in the Netherlands: species and pathogenicity

Fungi on roots and stem bases of asparagus in the Netherlands: species and pathogenicity

Characterisation ofFusarium oxysporum isolated from carnation in Australia based on pathogenicity, vegetative compatibility and random amplified polymorphic DNA (RAPD) assay

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