Olive anthracnose caused by Colletotrichum in Uruguay: symptoms, species diversity and pathogenicity on flowers and fruits

Moreira, Victoria; Mondino, Pedro; Alaniz, Sandra

doi:10.1007/s10658-021-02274-z

Cited by 18 publications

(39 citation statements)

References 32 publications

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“…The pathogen also causes the dieback of olive branches via phytotoxins (Aspergillomarasmine A) produced by the fungus in the rotten fruit (Figure 1e,f) [8,11,12]. Likewise, the pathogen can cause the blight of olive inflorescences, mainly when mummies remain attached to the tree canopy during the flowering [8,12,13]. In addition, the pathogen may act as a secondary invader of injured tissue and can also survive as endophyte or saprophyte.…”

Section: Introductionmentioning

confidence: 99%

“…have been associated with olive anthracnose over the world. These species belong to three Colletotrichum complexes: C. acutatum, C. boninense, and C. gloeosporioides [5,13,23,24]. Among them, the species C. acutatum sensu stricto (from now on C. acutatum), C. fioriniae, C. godetiae, C. nymphaeae, C. rhombiforme, and C. simmondsii, all of them belonging to the C. acutatum species complex, are currently considered the major pathogens of this genus [5,13,24].…”

Section: Introductionmentioning

confidence: 99%

“…These species belong to three Colletotrichum complexes: C. acutatum, C. boninense, and C. gloeosporioides [5,13,23,24]. Among them, the species C. acutatum sensu stricto (from now on C. acutatum), C. fioriniae, C. godetiae, C. nymphaeae, C. rhombiforme, and C. simmondsii, all of them belonging to the C. acutatum species complex, are currently considered the major pathogens of this genus [5,13,24]. While several Colletotrichum species can be found in an olive-growing area, there is usually one dominant one and some secondary [7].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, Mosca et al [28] and Schena et al [24] have hypothesized that C. acutatum is an emerging olive pathogen in Italy. This latter species has also been reported to cause olive anthracnose in Australia, Brazil, Greece, Portugal, South Africa, Tunisia, and Uruguay [4,5,13,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, other species belonging to the C. gloeosporioides species complex have been described in Australia (C. siamense and C. theobromicola), Montenegro (C. queenslandicum), and Uruguay (C. alienum and C. theobromicola) as associated with olive fruit [13,23]. Nevertheless, the pathogenicity of several of these species (C. aenigma, C. cigarro, C. karstii, C. queenslandicum, and C. siamense) on olive fruit is still uncertain, suggesting that their role in the fruit infection could be secondary [5].…”

Section: Introductionmentioning

confidence: 99%

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Diversity of Colletotrichum Species Associated with Olive Anthracnose Worldwide

Moral

Agustí-Brisach

Raya

et al. 2021

JoF

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Olive anthracnose caused by Colletotrichum species causes dramatic losses of fruit yield and oil quality worldwide. A total of 185 Colletotrichum isolates obtained from olives and other hosts showing anthracnose symptoms in Spain and other olive-growing countries over the world were characterized. Colony and conidial morphology, benomyl-sensitive, and casein-hydrolysis activity were recorded. Multilocus alignments of ITS, TUB2, ACT, CHS-1, HIS3, and/or GAPDH were conducted for their molecular identification. The pathogenicity of the most representative Colletotrichum species was tested to olive fruits and to other hosts, such as almonds, apples, oleander, sweet oranges, and strawberries. In general, the phenotypic characters recorded were not useful to identify all species, although they allowed the separation of some species or species complexes. ITS and TUB2 were enough to infer Colletotrichum species within C. acutatum and C. boninense complexes, whereas ITS, TUB2, ACT, CHS-1, HIS-3, and GADPH regions were necessary to discriminate within the C. gloesporioides complex. Twelve Colletotrichum species belonging to C. acutatum, C. boninense, and C. gloeosporioides complexes were identified, with C. godetiae being dominant in Spain, Italy, Greece, and Tunisia, C. nymphaeae in Portugal, and C. fioriniae in California. The highest diversity with eight Colletotrichum spp. was found in Australia. Significant differences in virulence to olives were observed between isolates depending on the Colletotrichum species and host origin. When other hosts were inoculated, most of the Colletotrichum isolates tested were pathogenic in all the hosts evaluated, except for C. siamense to apple and sweet orange fruits, and C. godetiae to oleander leaves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diversity of Colletotrichum Species Associated with Olive Anthracnose Worldwide

Moral

Agustí-Brisach

Raya

et al. 2021

JoF

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Effect of latent and symptomatic infections by Colletotrichum godetiae on oil quality

et al. 2022

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Anthracnose, caused by Colletotrichum spp., is the main olive fruit disease. Colletotrichum can severely infect olive fruit with a negative impact on the oil quality. However, the relationship between visible infections of Colletotrichum spp. and olive oil quality is unclear and the influence of latent infections is unknown. This study considers Colletotrichum spp. latent infections and visible infections as factors affecting the quality of olive oil. IAbsorbance in UV (K232 and K270), free acidity, and peroxide index were evaluated in oils from fruit with latent and symptomatic infections by Colletotrichum godetiae of the cvs. Arbequina, Hojiblanca, and Picual. Olive oil samples from i) latent infected fruit at three maturity stages and after two incubation periods and from ii) sets of oils from mixtures of healthy and infected symptomatic fruit were used to determine the impact of the disease on oil quality. Oils from latent infected fruit of cv. Arbequina showed higher acidity than control oils (P = 0.012). Linear and exponential models were fitted to relate the oil quality parameters to the proportion of symptomatic fruit. Acidity was the most affected parameter, mainly in oils from cv. Arbequina. The thresholds of the percentage of affected fruits causing the loss of category in the quality of the oil varied greatly according to cultivar, with ‘Arbequina’ being the most sensitive.

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