Fusarium oxysporum f. sp. lavandulae, a novel forma specialis causing wilt on Lavandula × allardii

2018 ◽  
Vol 100 (3) ◽  
pp. 391-397 ◽  
Author(s):  
Giuseppe Ortu ◽  
Domenico Bertetti ◽  
Maria Lodovica Gullino ◽  
Angelo Garibaldi
Keyword(s):  
Fusarium Oxysporum ◽  
Forma Specialis

scholarly journals Development of specific primers for Fusarium oxysporum causing damping off of Lilium formolongi

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Takeshi Toda ◽  
Shun Hanesaka ◽  
Kuniaki Shishido ◽  
Shin-ichi Fuji ◽  
Hiromitsu Furuya
Keyword(s):  
Fusarium Oxysporum ◽  
Pathogenic Fungus ◽  
Primer Design ◽  
Damping Off ◽  
Specific Primers ◽  
Forma Specialis

AbstractPrimers specific for the hypothetical forma specialis of Fusarium oxysporum were designed to amplify DNA from this pathogenic fungus that infects plants including lilies. The F. oxysporum sequence between the transposal elements han and hop was used for primer design. Three primer pairs designed from this region were confirmed as specific for 24 isolates of F. oxysporum pathogenic to lilies, except for one pathogenic isolates as extraordinary. No amplification was observed from F. oxysporum non-pathogenic to lily, from 12 forma specialis, and 14 fungi and oomycetes concerned with Liliaceae plants. We propose that specific primers designed from this region will be useful to detect isolates of F. oxysporum that are pathogenic to lilies.

scholarly journals Fusarium oxysporumf. sp.mori, a New Forma Specialis Causing Fusarium Wilt of Blackberry

Plant Disease ◽  
2017 ◽  
Vol 101 (12) ◽  
pp. 2066-2072 ◽  
Author(s):  
A. M. Pastrana ◽  
S. C. Kirkpatrick ◽  
M. Kong ◽  
J. C. Broome ◽  
T. R. Gordon
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Elongation Factor ◽  
Intergenic Spacer ◽  
Translation Elongation ◽  
Data Set ◽  
Tubulin Genes ◽  
Forma Specialis ◽  
Sequence Types ◽  
Strawberry Cultivars

Fusarium oxysporum has recently been identified as the cause of a wilt disease affecting blackberry in California and Mexico. Thirty-six isolates of F. oxysporum obtained from symptomatic blackberry plants in California and Mexico were comprised of nine distinct somatic compatibility groups (SCGs). Phylogenetic analysis of a concatenated data set, consisting of sequences of the translation elongation factor 1-α and β-tubulin genes and the intergenic spacer of the ribosomal DNA, identified nine three-locus sequence types, each of which corresponded to an SCG. Six SCGs were present only in California, two only in Mexico, and one in both California and Mexico. An isolate associated with the most common SCG in California was tested for pathogenicity on blueberry, raspberry, strawberry, and lettuce. All blueberry, raspberry, and lettuce plants that were inoculated remained healthy, but two of the five strawberry cultivars tested developed symptoms. The three strawberry cultivars that were resistant to the blackberry pathogen were also resistant to F. oxysporum f. sp. fragariae, the cause of Fusarium wilt of strawberry. We propose to designate strains of F. oxysporum that are pathogenic to blackberry as Fusarium oxysporum f. sp. mori forma specialis nov.

scholarly journals Fusarium oxysporum f. sp. palmarum, a Novel Forma Specialis Causing a Lethal Disease of Syagrus romanzoffiana and Washingtonia robusta in Florida

Plant Disease ◽  
2010 ◽  
Vol 94 (1) ◽  
pp. 31-38 ◽  
Author(s):  
M. L. Elliott ◽  
E. A. Des Jardin ◽  
K. O'Donnell ◽  
D. M. Geiser ◽  
N. A. Harrison ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Elongation Factor ◽  
Translation Elongation ◽  
The Past ◽  
Brown Stripe ◽  
Forma Specialis ◽  
Southern Half ◽  
Syagrus Romanzoffiana ◽  
Elongation Factor 1 ◽  
Morphological And Molecular Characterization

A new disease of Syagrus romanzoffiana (queen palm) and Washingtonia robusta (Mexican fan palm) has spread across the southern half of Florida during the past 5 years. The initial foliar symptom is a one-sided chlorosis or necrosis of older leaf blades, with a distinct reddish-brown stripe along the petiole and rachis and an associated discoloration of internal tissue. Within 2 to 3 months after onset of symptoms, the entire canopy becomes desiccated and necrotic but the leaves do not droop or hang down around the trunk. Based on pathogenicity and morphological and molecular characterization, the etiological agent has been identified as a new forma specialis of Fusarium oxysporum, designated f. sp. palmarum. Sequence analysis of a portion of the translation elongation factor 1-α gene (EF-1α) separated 27 representative isolates into two EF-1α groups, which differed by two transition mutations. Members of both EF-1α groups are pathogenic on both species of palm. A phylogenetic analysis inferred from partial EF-1α sequences from a genetically diverse set of F. oxysporum isolates, including three other formae speciales pathogenic on palm (i.e., f. sp. albedinis, f. sp. canariensis, and f. sp. elaeidis), suggested that f. sp. palmarum and f. sp. albedinis may be more closely related to one another than either is to the two other palm pathogens.

scholarly journals Characterization of a Vascular Wilt of Erythroxylum coca Caused by Fusarium oxysporum f. sp. erythroxyli Forma Specialis Nova

Plant Disease ◽  
1997 ◽  
Vol 81 (5) ◽  
pp. 501-504 ◽  
Author(s):  
D. C. Sands ◽  
E. J. Ford ◽  
R. V. Miller ◽  
B. K. Sally ◽  
M. K. McCarthy ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Vascular Tissue ◽  
South American ◽  
Vascular Wilt ◽  
Forma Specialis ◽  
Compatibility Group ◽  
Soil Infestation ◽  
Chamber Studies ◽  
Growth Chamber Studies

A new forma specialis of Fusarium oxysporum (F. oxysporum f. sp. erythroxyli) pathogenic to Erythroxylum coca and E. novogranatense is described. The pathogen was isolated from the vascular tissue of diseased plants from an Erythroxylum plantation in Hawaii. This pathogen causes vascular wilt symptoms and death in both E. coca and E. novogranatense plants as soon as 7 weeks after soil infestation. The pathogenicity of seven isolates from the affected field was determined in field and growth-chamber studies. Genetic variation was not detected among the seven Hawaiian isolates, using arbitrarily primed polymerase chain reaction. The seven isolates could be differentiated from a strain isolated from a diseased E. coca plant from South America. All Hawaiian isolates and the South American isolate belonged to a single vegetative compatibility group.

scholarly journals Reaction of pea selections to Fusarium oxysporum f.sp. pisi (races 1, 2, 5, 6) and Fusarium solani

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 561-564 ◽  
Author(s):  
J. Hýsek ◽  
J. Kreuzman ◽  
J. Brožová
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Artificial Infection ◽  
Physiological Races ◽  
Breeding Station ◽  
Forma Specialis ◽  
Resistant Varieties ◽  
Year 2000 ◽  
Selection Of

Forma specialis (f.sp.) pisi of Fusarium oxysporum infestates pea but on other crop does not cause. Physiological races of this fungus (races 1, 2, 3 and 6) are tested on differentiation selections of pea. In the mixture with Fusarium solani there was better differentiated the reaction of single races. Own method is based on the artificial infection of the pea with the mixture of conidia and mycelial fragments of the race of Fusarium oxysporum f.sp. pisi and Fusarium solani. The roots of germinating pea are partially shortened on the top and poured with the suspension of fungi. After the germinating the infected pea is placed into Perlit (the substance for the cultivation). The pea was watered after that. During 3 years of our work we tested namely many new selections from the breeding station in Lužany. It seems that some of them should be used for new selection of realy resistant varieties. In the year 1999 there were new selection relatively resistant: 595/32, 682/37, 238/847, in the year 2000 no resistant selections were gained and in the year 2001 there were like resistant evaluated these selections: 633/1409 and 1456/1919.

scholarly journals Current Status of Fusarium oxysporum Formae Speciales and Races

2019 ◽  
Vol 109 (4) ◽  
pp. 512-530 ◽  
Author(s):  
V. Edel-Hermann ◽  
C. Lecomte
Keyword(s):  
Fusarium Oxysporum ◽  
Host Range ◽  
Plant Species ◽  
Current Status ◽  
Economic Losses ◽  
Broad Host Range ◽  
Formae Speciales ◽  
Forma Specialis ◽  
Comprehensive Search ◽  
Fusarium Oxysporum Species Complex

The Fusarium oxysporum species complex includes both plant pathogenic and nonpathogenic strains, which are commonly found in soils. F. oxysporum has received considerable attention from plant pathologists for more than a century owing to its broad host range and the economic losses it causes. The narrow host specificity of pathogenic strains has led to the concept of formae speciales, each forma specialis grouping strains with the same host range. Initially restricted to one plant species, this host range was later found to be broader for many formae speciales. In addition, races were identified in some formae speciales, generally with cultivar-level specialization. In 1981, Armstrong and Armstrong listed 79 F. oxysporum formae speciales and mentioned races in 16 of them. Since then, the known host range of F. oxysporum has considerably increased, and many new formae speciales and races have been identified. We carried out a comprehensive search of the literature to propose this review of F. oxysporum formae speciales and races. We recorded 106 well-characterized formae speciales, together with 37 insufficiently documented ones, and updated knowledge on races and host ranges. We also recorded 58 plant species/genera susceptible to F. oxysporum but for which a forma specialis has not been characterized yet. This review raises issues regarding the nomenclature and the description of F. oxysporum formae speciales and races.

scholarly journals Identifikasi Infraspesifik Fusarium oxysporum asal Subtrat Nonpisang dan Kemampuan Pindah Inangnya ke Tanaman Pisang

2019 ◽  
Vol 15 (1) ◽  
pp. 27 ◽  
Author(s):  
Gayuh Rahayu ◽  
Widodo Widodo ◽  
Ni Putu Winda Mahasari
Keyword(s):  
Fusarium Oxysporum ◽  
Life Style ◽  
Causal Agent ◽  
Pathogenicity Test ◽  
Molecular Approach ◽  
Banana Plant ◽  
Specific Primers ◽  
Panama Disease ◽  
Specific Identification ◽  
Forma Specialis

Infra-specific Identification of Fusarium oxysporum from Nonbanana Substrates and Its Ability to Move Hosts to Banana PlantsFusarium oxysporum has various life style, i.e. saprobe, endophyte and pathogen. Plant pathogenic F. oxysporum are divided into many forma specialis (f. sp.) depending on the host, for instance F. oxysporum f. sp. cubense (Foc), a causal agent of Panama disease of banana. The study aimed to determine the infraspecific identity of F. oxysporum from non-banana host and evaluate its ability to jump banana plants. Infraspecific identity was determined through a molecular approach using 3 specific primers to recognize TR4 race (TR4 F/R, TR4 F/R1, and FocSc-1/ FocSc-2), while the host’s transfer ability was tested on 2 banana cultivars namely cv. Ambon and Tanduk. Thirteen strain studied  i.e IPBCC 88,012, IPBCC 07,528, IPBCC 07,561, IPBCC 08,562, IPBCC 08,568, IPBCC 10.674, IPBCC 14.1236, IPBCC 14.1237, IPBCC 14.1238 and IPBCC 14.1239 were TR4 Foc; IPBCC 07,338 and IPBCC 14.1242 are race Foc 4. The pathogenicity test of Foc IPBCC 88,012, 07,328, 08,561, 10,674 and 14.1236 derived from cucumbers, soil, agarwood sapwood, insect nests and quinine tree endophytes showed that these strains were able to move to banana plant. This shows that Foc may not host-specific and the infaspecific term forma specialis is therefore debatable.

scholarly journals First Report of Fusarium oxysporum Causing Vascular Wilt of Lamb's Lettuce (Valerianella olitoria) in Italy

Plant Disease ◽  
2004 ◽  
Vol 88 (1) ◽  
pp. 83-83 ◽  
Author(s):  
A. Garibaldi ◽  
G. Gilardi ◽  
M. L. Gullino
Keyword(s):  
Fusarium Oxysporum ◽  
Vascular Tissue ◽  
Selective Medium ◽  
Northern Italy ◽  
Growth Chamber ◽  
Pathogenicity Test ◽  
Vascular Wilt ◽  
First Report ◽  
Forma Specialis ◽  
Vascular Discoloration

Lamb's lettuce (Valerianella olitoria), also known as corn salad, is increasingly grown in Italy and used primarily in the preparation of mixed processed salad. In the summer of 2003, plants of lamb's lettuce cvs. Trophy and Palmares exhibiting wilt symptoms were observed in several commercial greenhouses near Bergamo in northern Italy. Wilted 30-day-old plants were observed first during the month of June, at the time of thinning when temperatures ranged between 28 and 35°C. Disease was generally uniform in the greenhouses and 30 to 50% of the plants were affected. Vascular tissue of affected seedlings appeared red or brown but later turned brown or black. Affected plants were stunted and developed yellowed leaves. Vascular discoloration was continuous from the upper taproot through the crown to the leaf. Fusarium oxysporum was consistently isolated from symptomatic vascular tissue onto a Fusarium-selective medium (1). Seeds of the same cultivars (Trophy and Palmares) affected by the wilt in the field were artificially inoculated by dipping them for 15 min into spore suspensions (1 × 106 conidia per ml) of three isolates of F. oxysporum obtained from infected plants. Noninoculated seeds served as control treatments. Forty seeds per treatment were sown in pots (1-liter volume) containing steam-sterilized soil and maintained at 25°C in a growth chamber programmed for 12 hours of light per day. Wilt symptoms developed on both cultivars 20 days after seeding, and F. oxysporum was consistently reisolated from infected plants. The plants obtained from noninoculated seeds remained healthy. The pathogenicity test was carried out twice with similar results. To our knowledge, this is the first report of F. oxysporum causing vascular wilt of lamb's lettuce and may warrant a new forma specialis designation. Reference: (1) H. Komada. Rev. Plant Prot. Res. 8:114, 1975.

Fusarium Oxysporum Forma Specialis Voandzeiae, A New Form Species Causing Wilt of Bambarra Groundnut

Mycologia ◽  
1975 ◽  
Vol 67 (4) ◽  
pp. 709-714
Author(s):  
G. M. Armstrong ◽  
Joanne K. Armstrong ◽  
R. V. Billington
Keyword(s):  
Fusarium Oxysporum ◽  
Forma Specialis ◽  
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