First Report of Gnomoniopsis castaneae Causing Canker on Hybrid Plants of Castanea sativa × C. crenata in Spain

Trapiello, Estefanía; Feito, Isabel; González, Ana J.

doi:10.1094/pdis-12-17-1874-pdn

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…From a molecular perspective, our isolates showed a very high degree of genetic similarity (>99%) for the ITS region to the isolates from Australia, Chile, Slovenia, Spain, the USA, France, Italy, New Zealand, the United Kingdom and Switzerland [9,[17][18][19]43,44]; (Figure 8). The TEF1-α sequence showed a higher diversity among isolates, with the Portuguese ones closer to those from Chile and Australia.…”

Section: Discussionmentioning

confidence: 83%

Chestnut Brown Rot and Gnomoniopsis smithogilvyi: Characterization of the Causal Agent in Portugal

Possamai

Dallemole-Giaretta

Gomes-Laranjo

et al. 2023

JoF

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Sweet chestnut (Castanea sativa Miller) is a nutritious food with high social and economic impacts in Portugal. The fungus Gnomoniopsis smithogilvyi (syn. Gnomoniopsis castaneae) is the causal agent of chestnut brown rot, and is currently considered one of the major threats to the chestnut production chain worldwide. Considering the lack of knowledge on both the disease and the causal agent in Portugal, studies were conducted in an attempt to develop the necessary control strategies towards the mitigation of the disease in a timely way. Isolates of G. smithogilvyi were selected from three varieties of chestnut from the northeast of Portugal, and were characterized at the morphological, ecophysiological and molecular levels. Tests of pathogenicity and virulence were also developed. Gnomoniopsis smithogilvyi was confirmed as the causal agent of brown rot disease in Portuguese chestnut varieties, which showed high susceptibility. The fungus showed high adaptability to chestnut substrates. The Portuguese isolates of G. smithogilvyi are morphologically and genetically similar to those from other countries, even though some physiological variability was observed among them.

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Section: Discussionmentioning

confidence: 83%

Chestnut Brown Rot and Gnomoniopsis smithogilvyi: Characterization of the Causal Agent in Portugal

Possamai

Dallemole-Giaretta

Gomes-Laranjo

et al. 2023

JoF

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“…The related species of Gnomoniopsis daii, G. smithogilvyi, has been reported to cause serious disease on Castanea sativa and C. crenata × C. sativa hybrids in Europe and Oceania [13,19]. The infection process and cycle of chestnut disease has been demonstrated, and ascospores of G. smithogilvyi from chestnut buds are key to causing fruit rot [11,13].…”

Section: Discussionmentioning

confidence: 99%

An Emerging Pathogen from Rotted Chestnut in China: Gnomoniopsis daii sp. nov.

Jiang

Tian

2019

Forests

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Nut quality is fundamental to the economic viability of the Chinese sweet chestnut industry, but fruit rot disease significantly reduces this quality. In this study, we investigated chestnut rot in Anhui and Hubei provinces in China. Typical brown rot symptoms were observed, affecting nuts from different plantations. Isolates were obtained from symptomatic tissues of rotted fruits that were identified based on morphological comparison and phylogenetic analyses of partial internal transcribed spacer (ITS), and tef1 and tub2 gene sequences. The inoculation results showed that the tested fungal species is pathogenic to chestnut fruits. Hence, a new and severe pathogen that causes Chinese sweet chestnut brown rot, Gnomoniopsis daii sp. nov., is introduced herein.

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“…Another example is that Gnomoniopsis daii causes Chinese chestnut rot and Gnomoniopsis smithogilvyi causes European chestnut rot (Crous et al 2012;Jiang and Tian 2019). Interestingly, this study reveals a novel Gnomoniopsis species, G. chinensis, as an opportunistic pathogen causing bark cankers on Chinese chestnut, which is different from Gnomoniopsis smithogilvyi causing both nut rot and bark cankers (Crous et al 2012;Visentin et al 2012;Rai 2013, 2015;Pasche et al 2016;Lewis et al 2017;Trapiello et al 2018).…”

Section: Discussionmentioning

confidence: 61%

“…Gnomoniopsis smithogilvyi is an important nut rot agent on chestnut nuts, an endophyte in asymptomatic flowers, leaves and stems, and a saprobe on dead burrs and branches (Crous et al 2012;Visentin et al 2012). Moreover, this species has been reported as a severe bark pathogen on Castanea in several countries Rai 2013, 2015;Pasche et al 2016;Lewis et al 2017;Trapiello et al 2018;Lione et al 2019). In China, Gnomoniopsis from rotten Chinese chestnut has proved to be a different species, namely Gnomoniopsis daii (Jiang and Tian 2019).…”

Section: Introductionmentioning

confidence: 99%

Gnomoniopsis chinensis (Gnomoniaceae, Diaporthales), a new fungus causing canker of Chinese chestnut in Hebei Province, China

Jiang¹,

Liang²,

Tian³

2020

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Chinese chestnut (Castanea mollissima) is an important crop tree species in China. However, branch canker and fruit rot are two kinds of severe diseases, which weaken the host and decrease chestnut production. During our investigations into chestnut diseases in China, several fungi have been confirmed as casual agents in previous studies, namely Aurantiosacculus castaneae, Cryphonectria neoparasitica, Cry. parasitica, Endothia chinensis and Gnomoniopsis daii. In this study, a new canker pathogen is introduced based on morphology, phylogeny and pathogenicity. Typical Gnomoniopsis canker sign of wide, orange tendrils emerging from hosts’ glaucous lenticels were obvious on the diseased trees in the field. Symptomatic branches or bark on stems from different chestnut plantations were sampled and isolated, then strains were identified by comparisons of DNA sequence data for the nuclear ribosomal internal transcribed spacer (ITS), partial translation elongation factor-1α (tef1) and β-tubulin (tub2) gene regions as well as morphological features. As a result, these strains appeared different from any known Gnomoniopsis species. Hence, we propose a novel species named Gnomoniopsis chinensis. Pathogenicity was further tested using the ex-type strain (CFCC 52286) and another strain (CFCC 52288) on both detached branches and 3-year-old chestnut seedlings. The inoculation results showed that Gnomoniopsis chinensis is mildly pathogenic to Chinese chestnut. However, further studies are required to confirm its pathogenicity to the other cultivated Castanea species in America, Europe and Japan.

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First Report of Gnomoniopsis castaneae Causing Canker on Hybrid Plants of Castanea sativa × C. crenata in Spain

Cited by 11 publications

References 3 publications

Chestnut Brown Rot and Gnomoniopsis smithogilvyi: Characterization of the Causal Agent in Portugal

Chestnut Brown Rot and Gnomoniopsis smithogilvyi: Characterization of the Causal Agent in Portugal

An Emerging Pathogen from Rotted Chestnut in China: Gnomoniopsis daii sp. nov.

Gnomoniopsis chinensis (Gnomoniaceae, Diaporthales), a new fungus causing canker of Chinese chestnut in Hebei Province, China

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