Infection without wounding and symptomless shoot colonization of <i>Pinus radiata</i> by <i>Fusarium circinatum</i>, the cause of pitch canker

Swett, Cassandra L.; Reynolds, G.; Gordon, Thomas R.

doi:10.1111/efp.12422

Cited by 15 publications

(16 citation statements)

References 26 publications

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“…Both P. nigra and P. sylvestris have been found to be potential hosts of F. circinatum, showing moderate susceptibility to the disease . However, the apparent absence of the pathogen in sampled mycobiota did not rule out its possible latent presence in the asymptomatic area, as recently reported in P. pinaster and P. radiata stands (Hernández-Escribano et al, 2018a;Swett et al, 2018). The results showed here are consistent with those provided by regarding T. piniperda, whereas the association between the pathogen and T.…”

Section: Conflict Of Interestsupporting

confidence: 81%

“…mycelial strands, runner hyphae and hyphopodia-like structures, among others), while only the finest branches and roots were severely damaged. Recent studies also showed that the fungus can remain in a latent state in asymptomatic pines (Hernández-Escribano et al, 2018a;Swett et al, 2018). Consequently, the relationship between the PPC fungus and the pine host could be mainly biotrophic (i.e.…”

Section: The Pathosystem: a Network Of Interactionsmentioning

confidence: 99%

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Interactions virus-fungus- insect in pine pitch canker disease

Adalia¹

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The fungus as a node in the pathosystem 7.3. Virus-fungus interactions 7.4. Fungus-plant interactions 7.5. Virus-fungus-plant interactions 7.6. Fungus-insect-plant interactions 8. General discussion 9. Conclusions / Conclusiones 9.1. Conclusions 9.2. Conclusiones 10. References 11. Appendices 11.1. Quick reference of variables 11.2. List of tables and figures Pablo Martínez-Álvarez por su compañerismo sincero, por enseñarme tantas cosas y por escucharme cuando lo necesité; Antonio Sanz-Ros por brindarme su experiencia para afianzar el camino; Ruth Rodríguez-Pastor por su amistad y contagiosa motivación y Asdrúbal Flores-Pacheco por compartir innumerables aventuras y buenas charlas que siempre recordaré. A mi familia y amigos, así como a todas aquellas personas que he conocido durante esta travesía. A aquellos que creyeron que podía hacerlo, que supieron ver que mi vocación navegaba por las aguas de la ciencia y que de una u otra forma contribuyeron a que este sueño se hiciera realidad. Lugar de honor merecen mis padres, testigos de mis desvelos, incansables e insustituibles apoyos en mi vida. Gracias. Y por supuesto Beatriz, por ser mi luz y hacer de este mundo un lugar genial.

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Section: Conflict Of Interestsupporting

confidence: 81%

Section: The Pathosystem: a Network Of Interactionsmentioning

confidence: 99%

Interactions virus-fungus- insect in pine pitch canker disease

Adalia¹

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“…and F. commune (Skovgaard, O'Donnell and Nirenberg) caused damping-off in Douglas fir seedlings under greenhouse conditions. Similar results point to F. circinatum (Nirenberg and O'Donnell) as the causal agent of damping-off in seedlings of P. maximinoi (Moore) and P. tecunumanii (Maphosa et al, 2016;Martínez-Álvarez et al, 2016;García Díaz et al, 2017;Flores-Pacheco, 2017;Swett et al, 2018).…”

Section: Introductionmentioning

confidence: 61%

The Causal Agent of Damping-off in Pinus patula (Schiede) and Pinus tecunumanii (Schwerdtf.)

et al. 2019

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Damping-off is considered one of the most serious risks for production of Pinus seedlings due to the significant losses it can cause in forest nurseries. In Colombia there is little information about the etiology of this limiting disease. Different species of the genus Fusarium have been reported as causal agents, which makes the study of the pathogenicity of this genus relevant. In this study, strain 001F of Fusarium oxysporum was obtained from the diseased tissues of P. patula seedlings. The identity of the species was determined by sequencing the internal transcribed spacer (ITS) regions. Pathogenicity tests confirmed the ability of strain 001F to cause damping-off symptoms in P. patula and P. tecunumanii. Thus, F. oxysporum strain 001F represents a significant risk to produce tree species in Colombia and in other parts of the world.

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“…Natural infections presumably occur through wounds of the potential host, although Swett et al (2018) demonstrated that F. circinatum is also able to colonise the seedling stem and mature tree branches without wounds. Once the conidia germinate on host tissue, the fungus first moves radially through the plant, advancing towards the pith of the stem (Martín-Rodrigues et al, 2013).…”

Section: Life Cyclementioning

confidence: 99%

Pest survey card on Fusarium circinatum

Mart¹,

Vos²

2020

EFS3

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The European Commission requested EFSA (M-2017-0137) to assist the Member States to plan annual survey activities of quarantine organisms using a statistically sound and risk-based pest survey approach, in line with current international standards. Fusarium circinatum is a Union quarantine pest that is currently present in Spain and Portugal. It is an ascomycete fungal pathogen and the causal agent of pitch canker disease. It enters the hosts through wounds in the plant tissues and the spores are spread naturally by wind, splashing water or by insects. Host plant species are available throughout the EU and the climate is suitable for the establishment of the pest in almost the entire EU territory. Detection surveys should mainly focus on Pinus spp. and Pseudotsuga menziesii. Delimiting surveys should include all known host plants of F. circinatum that can be found in the survey area.The main risk activities relevant for surveillance are the exchange of propagation material of Pinus spp. or P. menziesii and the import of wood material or plant material for decorative purposes (e.g. Christmas trees). Visual inspection is effective for the detection of F. circinatum on adult trees because symptoms can be found on almost all plant parts, whereas in forest nurseries it is not reliable due to the possibility of asymptomatic infection in seedlings. Moreover, for seeds there are no visual symptoms that can be observed. When symptoms of pine pitch canker (PPC) are observed, samples should be taken for laboratory confirmation of F. circinatum. Molecular methods are preferred for the laboratory identification.

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Infection without wounding and symptomless shoot colonization of Pinus radiata by Fusarium circinatum, the cause of pitch canker

Cited by 15 publications

References 26 publications

Interactions virus-fungus- insect in pine pitch canker disease

Interactions virus-fungus- insect in pine pitch canker disease

The Causal Agent of Damping-off in Pinus patula (Schiede) and Pinus tecunumanii (Schwerdtf.)

Pest survey card on Fusarium circinatum

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