Distribución geográfica y caracterización fenotípica y molecular de Neonectria fuckeliana, asociado a cancros fustales de Pinus radiata en Chile

González, Cristian; Morales, Roberto; Riegel, Ricardo; Aravena, Marcos; Valenzuela, Eduardo

doi:10.4067/s0717-92002015000300019

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…In general, the symptoms are mainly associated with pruning management in plantations of southern Chile (González et al, 2015; Morales, 2009). This type of forest management is performed in winter, and cankers begin to appear during the following months (Figure 3b).…”

Section: Resultsmentioning

confidence: 99%

“…In Chile and New Zealand, P. radiata plantations are the most important introduced economic forest resources, where they are grown over more than 1.4 and 1.8 million hectares, respectively (Dick & Crane, 2009; Instituto Forestal, 2017). On the other hand, C. constricta occurs mainly in the coastal area of Chile, with a 450‐km latitudinal distribution from the south of the Bio‐Bio region to Los Lagos and affecting the most valuable radiata pine plantations (González, Morales, Riegel, Aravena, & Valenzuela, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Life cycle and in vitro sporulation dynamics of Corinectria constricta, the causal agent of Pinus radiata stem canker, in Chile

2020

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In 2008, a canker disease caused by the fungus Corinectria constricta was detected in southern Chile. The causal agent was previously identified as Neonectria fuckeliana (now Corinectria fuckeliana), which has been associated with stem cankers in Pinus radiata plantations in New Zealand since the 1990s. Many basic aspects of the life cycle of C. constricta remain unknown. The current study aimed to (a) document the periods during which C. constricta fruiting bodies are present in P. radiata plantations and associated factors; (b) determine the C. constricta life cycle in P. radiata plantations in southern Chile; and (c) evaluate, under in vitro conditions, the sporulation dynamics of ascospores. The first and second aims were carried out by evaluating affected plantations every 15 days, identifying asexual and sexual fungal structures, and recording the time periods when the structures were present. The third aim was achieved with in vitro tests in Petri dishes simulating humidity chambers. The life cycle was characterized by the presence of sporodochia from the Cylindrocarpon‐like (asexual form of C. constricta) morph during the autumn of 2012 (March–May). Subsequently, perithecia began to form on the sporodochia during April of 2012, taking approximately 3 months to mature (May–July), persisting for the rest of the year and providing inoculum to infect new trees. The development of perithecia in winter demonstrates that this is the most important period for dispersal and infection. In terms of sporulation dynamics, perithecia can release ascospores up to eight days following a wetting event; without this event, the spores are not released.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Life cycle and in vitro sporulation dynamics of Corinectria constricta, the causal agent of Pinus radiata stem canker, in Chile

2020

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Corinectria, a new genus to accommodate Neonectria fuckeliana and C. constricta sp. nov. from Pinus radiata in Chile

González

Chaverri

2017

Mycol Progress

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Occurrence and pathogenicity of Corinectria spp. – an emerging canker disease of Abies sibirica in Central Siberia

Pavlov

Vasaitis

Litovka

et al. 2020

Sci Rep

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During recent years, a new disease of Siberian fir (A. sibirica) emerged in Central Siberia, exhibiting symptoms of stem/branch deformation, cambium necrosis, and dieback of branches and twigs, the causal agent remaining unknown. The aim was to identify agent of the disease and to investigate its pathogenicity to A. sibirica and Norway spruce (Picea abies). Symptomatic tissues of fir were subjected to pure culture isolation of anticipated pathogen(s). Obtained isolates were subjected to molecular identification, phylogenetic analyses, and pathogenicity tests with A. sibirica saplings, and seeds and seedlings of A. sibirica and P. abies. The study demonstrated that, (i) most commonly isolated fungus from canker wounds of A. sibirica exhibited Acremonium-like anamorphs; (ii) phylogeny demonstrated that investigated fungi belong to genus Corinectria, but are genetically well separated from other worldwide known Corinectria spp.; (iii) one species of isolated fungi has the capacity to cause the disease and kill A. sibirica saplings and seedlings, but also seedlings of P. abies. Guidelines for future research were defined in order to generate needed information on species description, its origin and ecology, and estimation of potential risks upon the eventual invasion of the pathogen to new geographic areas, in particular of Europe. Abies sibirica Ledeb., the Siberian fir, is a very widespread tree species: the range of its native distribution covers a huge geographic area, stretching from Northern Europe-Russia (starting east of the Volga River), through Siberia to northern China, Mongolia, and the Russian Far East, reaching north up to 67°40′ Northern latitude (http://www.agroatlas.ru/en/content/related/Abies_sibirica/map/index.html) (Fig. 1). There, A. sibirica forms extensive forests on the northern plains and on cool wet mountainsides, growing on soils that are usually of alluvial origin, podzolic, calcareous, well drained and free of permafrost; in the mountains, reaching elevations up to 2000 metres. It is an economically important timber species, extensively harvested from vast natural stands for use in construction, pulp etc.; the tree also has local medicinal uses 1. Notably, native range of A. sibirica in the European part of Russia (west of Ural Mountains reaching the Volga River) overlaps with that of Norway spruce (Picea abies (L.) Karst.) (Fig. 1), one of the most economically important timber producing tree species of Europe. During recent years, a new disease of A. sibirica emerged in Central Siberia (Fig. 1), exhibiting symptoms of stem/branch deformation, cambium necrosis, and dieback of branches and twigs, with the subsequent development on those of round red fungal fruitbodies (Fig. 2A-C). The disease is typically observed on relatively young re-growth trees, and often results in their death. The first symptoms of the disease have been observed in the year 2006 in the eastern Sayan Mountains (N54°29′13″; E93°27′11″; elevation 700 m), and after following two years it was repeatedly observed within ...

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Distribución geográfica y caracterización fenotípica y molecular de Neonectria fuckeliana, asociado a cancros fustales de Pinus radiata en Chile

Cited by 3 publications

References 13 publications

Life cycle and in vitro sporulation dynamics of Corinectria constricta, the causal agent of Pinus radiata stem canker, in Chile

Life cycle and in vitro sporulation dynamics of Corinectria constricta, the causal agent of Pinus radiata stem canker, in Chile

Corinectria, a new genus to accommodate Neonectria fuckeliana and C. constricta sp. nov. from Pinus radiata in Chile

Occurrence and pathogenicity of Corinectria spp. – an emerging canker disease of Abies sibirica in Central Siberia

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