A host specialized form of Ceratocystis fimbriata causes seed and seedling blight on native Carapa guianensis (andiroba) in Amazonian rainforests

Valdetaro, Denise C. O. F.; Harrington, T. C.; Oliveira, Leonardo S. S.; Guimarães, Lúcio Mauro da Silva; McNew, Douglas; Pimenta, Lucas Veiga Ayres; Gonçalves, Rivadalve C.; Schurt, Daniel Augusto; Alfenas, Acelino C.

doi:10.1016/j.funbio.2018.12.001

Cited by 17 publications

(25 citation statements)

References 45 publications

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“…This is also consistent with recent molecular genetic data showing that isolates of C. fimbriata from sweet potato represent a clonal lineage ( Li et al . 2016 ), which has also been designated ( Valdetaro et al . 2019 ) as a host-specific form referred to as C. fimbriata f. sp.…”

Section: Discussionmentioning

confidence: 99%

“…To demonstrate the phylogenetic relationship between the sweet potato isolate of C. fimbriata epitypified in this paper, other sweet potato isolates and forma specialis ( Valdetaro et al . 2019 ) available in GenBank, and closely related species ( Fourie et al 2015 , Marin-Felix et al 2017 ) a phylogenetic tree was constructed based on the ITS gene regions using maximum parsimony analysis as described in Fourie et al (2015) .…”

Section: Methodsmentioning

confidence: 99%

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Epitypification of Ceratocystis fimbriata

Marincowitz¹,

Barnes²,

Beer³

et al. 2020

Fungal Systematics and Evolution

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Ceratocystis accommodates many important pathogens of agricultural crops and woody plants. Ceratocystis fimbriata, the type species of the genus is based on a type that is unsuitable for a precise application and interpretation of the species. This is because no culture or DNA data exist for the type specimen. The aim of this study was to select a reference specimen that can serve to stabilize the name of this important fungus. We selected a strain, CBS 114723, isolated from sweet potato in North Carolina, USA, in 1998 for this purpose. The strain was selected based on the availability of a living culture in a public depository. A draft genome sequence is also available for this strain. Its morphological characteristics were studied and compared with the existing and unsuitable type specimen as well as with the original descriptions of C. fimbriata. The selected strain fits the existing concept of the species fully and we have consequently designated it as an epitype to serve as a reference specimen for C. fimbriata.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Epitypification of Ceratocystis fimbriata

Marincowitz¹,

Barnes²,

Beer³

et al. 2020

Fungal Systematics and Evolution

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“…The name C. fimbriata f. sp. ipomoea was proposed for this strain (Valdetaro et al 2019), however, Marincowitz et al (2020) who have recently designated an epitype for C. fimbriata, treat this name as a synonym of C. fimbriata sensu stricto. This study has shown that the New Zealand kūmara isolates of C. fimbriata are not pathogenic on the kiwifruit cultivars tested, and there is unlikely to be a threat from the New Zealand Ipomoea strain moving into kiwifruit orchards.…”

Section: Discussionmentioning

confidence: 99%

Pathogenicity of Ceratocystis fimbriata from New Zealand kūmara on kiwifruit cultivars

Tyson

Manning

Wright

2020

NZPP

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INTRODUCTION Ceratocystis fimbriata is a fungal pathogen that affects a wide variety of plant hosts, in more than 22 families, many of which are of commercial importance. It was first identified on Ipomoea batatas in northeastern USA in 1890 (Halsted 1890), and since then has been widely reported across the world. Ipomoea batatas is known as kūmara in New Zealand and as sweet potato in many other parts of the world, and this distinction is used here. The first record of C. fimbriata in New Zealand was by Kirk (1907) causing black-rot of kūmara in the North Island. In 1947, it was reported on kūmara in Kaitaia and, by 1960, had also been recorded from the Bay of Islands, Helensville, Great Barrier Island, Auckland, Matakana Island (Bay of Plenty) and Gisborne (Slade 1960). Ceratocystis fimbriata is now thought to be a complex of very similar fungal species with numerous different strains. Four phylogenetic clades are now recognised, including the Latin American clade (LAC) (Harrington et al. 2011), to which the Ipomoea strain belongs. Some of the strains of C. fimbriata appear to be host-specific, while others infect a range of hosts, including many of economic importance. Several are potentially different species, others (e.g. C. platani) have previously been raised to species level (Engelbrecht & Harrington 2005). In 2014, C. fimbriata was reported on Ohi'a (Metrosideros polymorpha) in Hawai'i (Keith et al. 2015). It was subsequently shown that the rapid death of Ohi'a was caused by two distinct species within the Ceratocystis fimbriata complex; C. lukuohia and C. huliohia (Barnes et al. 2018). Ceratocystis fimbriata sensu lato is a complex of soil-borne pathogens that cause wilt and cankers on woody plants, e.g. plane trees (Platanus spp.) and Eucalyptus spp. (Zauza et al. 2004; Tsopelas et al. 2017), as well as postharvest rots of storage roots and corms, e.g. taro (Colocasia esculenta) and sweet potato (Halsted & Fairchild 1891; Harrington et al. 2005). Woody hosts tend to be invaded through wounds, although the pathogen may also move between hosts through root grafts and may also directly infect roots (Harrington 2013). In sweet potato/kūmara, infection may be through contaminated planting material (slips) but the pathogen is more often introduced directly through damaged roots, lenticels or wounds (Lewthwaite et al. 2011). In South America, C. fimbriata is a native pathogen with a wide host range (Harrington et al. 2011; Ferreira et al. 2013). In 2010, it was reported causing wilt and death of kiwifruit (Actinidia spp.) vines in Rio Grande do Sul, Brazil (Sonego et al. 2010; Ferreira et al. 2013; Piveta et al. 2016). Subsequent phylogenetic analyses showed that the kiwifruit isolates belonged to three lineages within the LAC, suggesting three populations of C. fimbriata genotypes on kiwifruit (Ferreira et al. 2017). All kiwifruit isolates tested by Piveta et al. (2016) were pathogenic to kiwifruit and isolates from different ITS haplotypes did not differ widely in aggressiveness. Symptoms of ceratocystis wi...

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“…; Tarigan et al, 2011), rubber tree (Hevea sp. ; Valdetaro et al, 2015), and andiroba (Carapa guianensis; Valdetaro et al, 2019).…”

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confidence: 99%

“…Some species have been described mainly based on variation of the internal transcribed spacer (ITS) region, revealing some taxonomic problems (Harrington et al, 2014). On the other hand, a biological species concept considering phenotype and mating studies has been applied to the C. fimbriata complex (Ferreira et al, 2010;Oliveira et al, 2015;Valdetaro et al, 2019). Efforts have been made to identify accurate methodologies for a better clarification of species differentiation and, therefore, provide a better understanding of the biology and ecology of this important group of fungi.…”

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confidence: 99%

Resistance of kiwifruit cultivars to ceratocystis wilt: An approach considering the genetic diversity and variation in aggressiveness of the pathogen

Oliveira¹,

Pimenta

Guimarães

et al. 2020

Plant Pathology

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Kiwifruit (Actinidia spp.) is native to southern China, but was first cultivated in New Zealand and then spread worldwide. Emerging diseases such as ceratocystis wilt have attracted the attention of kiwifruit growers due to the great losses observed in southern Brazil. Effective control can be achieved by screening for resistance, but the genetic variability of the pathogen must be considered. Thus, this study aimed to assess the genetic diversity and variation in aggressiveness of Ceratocystis isolates from kiwifruit in southern Brazil and then evaluate the resistance of kiwifruit cultivars with the most aggressive isolates. A collection of 46 isolates were obtained from southern Brazil and 14 simple‐sequence repeat (SSR) markers was successfully used for genotyping. Out of 14 markers, 13 were polymorphic and identified 26 genotypes. Fourteen distinct genotypes were tested on a susceptible cultivar to select the most aggressive ones. Finally, inoculation with an equal mixture of five of the most aggressive isolates was used to evaluate the resistance of seven kiwifruit cultivars: Red Arguta, Green Arguta, Allison, Chieftain, Hayward, Monty, and Tomury. Cultivars varied in levels of susceptibility, with disease severity ranging from 40% to 100%. Considering the length of stem lesions, Chieftain showed the lowest level of severity at 40%, while no wilt symptoms were observed at 45 days after inoculation. In addition to the seven cultivars, a half‐sibling progeny with 618 plants of the rootstock cv. Bruno was also assessed, but only seven individuals were resistant. These seven plants can be cloned and used as resistant rootstocks in commercial orchards.

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A host specialized form of Ceratocystis fimbriata causes seed and seedling blight on native Carapa guianensis (andiroba) in Amazonian rainforests

Cited by 17 publications

References 45 publications

Epitypification of Ceratocystis fimbriata

Epitypification of Ceratocystis fimbriata

Pathogenicity of Ceratocystis fimbriata from New Zealand kūmara on kiwifruit cultivars

Resistance of kiwifruit cultivars to ceratocystis wilt: An approach considering the genetic diversity and variation in aggressiveness of the pathogen

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