First report and characterization of Fusarium circinatum, the causal agent of pitch canker in Brazil

Pfenning, Ludwig H.; Costa, Sarah da Silva; Melo, Maruzanete Pereira de; Costa, Hélcio; Ventura, José Aires; Auer, Celso Garcia; Santos, Á. F. dos

doi:10.1590/s1982-56762014000300004

Cited by 32 publications

(26 citation statements)

References 27 publications

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“…The pathogen was first detected in 1945 in Pinus virginiana Mill in the southeastern United States (Hepting & Roth, 1946). Since then, it has continued to expand throughout the world and has been found infecting different conifer species in Mexico (GuerraSantos, 1998), Haiti (Hepting & Roth, 1953), Japan (Kobayashi & Muramoto, 1989), South Africa (Viljoen et al, 1994, Coutinho et al, 2007, Chile (Wingfield et al, 2002), Korea (Cho & Shin, 2004), Uruguay (Alonso & Bettucci, 2009), Colombia (Steenkamp et al, 2012) and, more recently, in Brazil (Pfenning et al, 2014). In Europe, the pathogen has been also recorded in Spain (Dwinell, 1999;Landeras et al, 2005) (EPPO, 2006), Portugal (Bragança et al, 2009) and Italy (Carlucci et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Short communication: Effect of mycoviruses on growth, spore germination and pathogenicity of the fungus Fusarium circinatum

et al. 2018

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Aim of the study: To assess the impact on two mycoviruses recently described in F. circinatum mitovirus 1 and 2-2 (FcMV1 and FcMV2-2) on i) mycelial growth, ii) spore germination and iii) relative necrosis.Material and methods: Fourteen monosporic strains of F. circinatum (one of each pair infected with mycoviruses and the other without them) of the pathogen with and without viruses were selected for the assay. The statistical analysis, were a linear mixed model of analysis of variance considering one between-subjects factor (isolate) and one within-subjects factor with four levels (1=without viruses, 2=only virus FcMV1, 3=only virus FcMV2-2 and 4=both viruses).Main results: Colony growth rates of F. circinatum isolates were significantly reduced in presence of mycoviruses (p=0.002). The spore germination was also reduced in the F. circinatum isolates containing mycovirus as compared to mycovirus-free isolates (p<0.001). No significant differences in lesion lengths caused by F. circinatum were found in relation to the presence/absence of mycovirus (p<0.61).Research highlights: Reduction of the percentage of spore germination in the isolates of F. circinatum with mycovirus infections, as compared to free isolates, provides indications of reduction of metabolic activity and plant physiology are discussed. The lack of significant differences found in the length of the lesions caused by F. circinatum with respect to the presence/absence of mycovirus, indicates that further studies with a larger number of variables are required Additional keywords: pine pitch canker; hypovirulence; biological control; forest pathology.

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Section: Introductionmentioning

confidence: 99%

Short communication: Effect of mycoviruses on growth, spore germination and pathogenicity of the fungus Fusarium circinatum

et al. 2018

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“…Since it was first recognized in Southeastern USA [1], the disease has been reported in other parts of the world [2]. In many of these reports, the disease appeared first in forest nurseries, like in South Africa [3], Chile [4], Spain [5], Portugal [6] and Brazil [7]. In trees, F. circinatum causes branch dieback and resinous cankers that progressively girdle the wood causing branch death.…”

Section: Introductionmentioning

confidence: 99%

Impact of Seed Transmission on the Infection and Development of Pitch Canker Disease in Pinus radiata

Evira-Recuenco

Iturritxa

Raposo

2015

Forests

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Abstract:The aim of this study was to determine the impact of seed inoculum on subsequent disease development in nurseries, specifically studying incidence of seed infection, transmission rate of seed to seedlings, and rate of disease development from the primary inoculum source. Transmission rate of Fusarium circinatum (F. circinatum) from symptomatic trees of Pinus radiata (P. radiata) to seed was 0.73%, being the fungus mainly on the coat. Seed infection incidence was positively correlated with tree disease severity. Seeds also become contaminated with F. circinatum during storage, where high relative humidity had a great effect regardless of temperature. Transmission rates from seeds to symptomatic seedlings measured at 48 days after seed inoculation with 10 4 and 10 6 was 28% and 80%, respectively. Seedlings showed symptoms of wilting and dieback, and eventually died within the total duration of this study (475 days). By this time, there were two remaining symptomless seedlings (1% of the total). F. circinatum was recovered from each of them, demonstrating its persistence in seedlings. Fungus populations in roots were estimated between 10 5 and 10 7 cfu/g in symptomatic plants for both inoculum doses and up to 10 4 cfu/g in asymptomatic plants. Disease infection rate was similar in post-emergence damping-off (up two months growing) and for established seedlings (up to eight months) after seeds were inoculated with 10 4 spores/mL. OPEN ACCESSForests 2015, 6 3354

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“…Pitch canker is characterized by the development of large resinous cankers at the sites of infection in natural stands and plantations of the susceptible pine tree species (Fitza et al, 2013). It is one of the most important diseases of pine trees worldwide (Pfenning et al, 2014). F. circinatum was first recorded in North Carolina (USA) in the 1940s.…”

Section: Pitch Cankermentioning

confidence: 99%

The fungal pathogens causing diseases in pines

Raitelaitytė¹,

Rutkauskas²,

Radzijevskaja³

et al. 2017

biologija

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Fungal infections are the main cause of emerging infectious diseases in forest trees. Over the past decades, the number of invasive fungal pathogens in Europe has increased exponentially. In this paper the fungal pathogens causing the most common diseases in pines like Dothistroma needle blight, brown spot needle blight, Lophodermium needle cast, Scots pine blister rust, Scleroderris canker, and Pitch canker were analyzed. These diseases cause defoliation, increase susceptibility of plants to other diseases and pests, and tree mortality can also occur. As a result, the forest industry is suffering severe economic losses. The fungi species causing infection in forest trees have been described as serious pathogens across the world including Europe, confirming a fast spread of their ranges. Knowledge of pathogens distribution, life cycle and disease symptoms are essential for the diagnostic and control of pathogenic fungi. Human-driven species expansion has increased in the last century due to the growth of international travel and trade, resulting in huge disturbance to ecosystems. Most of the plant diseases are strongly influenced by environmental conditions. Climate change has important consequences on plants, pathogens, and the interaction between them, resulting in changes on diseases epidemics. Fungal infections of plants are difficult to control because pathogens populations are variable in time, space, and genotypes. The potential damage in the future may be large, and that is why we have to be aware of the problems and discuss some possible approaches to reducing the threats.

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First report and characterization of Fusarium circinatum, the causal agent of pitch canker in Brazil

Cited by 32 publications

References 27 publications

Short communication: Effect of mycoviruses on growth, spore germination and pathogenicity of the fungus Fusarium circinatum

Short communication: Effect of mycoviruses on growth, spore germination and pathogenicity of the fungus Fusarium circinatum

Impact of Seed Transmission on the Infection and Development of Pitch Canker Disease in Pinus radiata

The fungal pathogens causing diseases in pines

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