Múltiplos apressórios e tubos de anastomoses conidiais no processo infeccioso de Colletotrichum gloeosporioides em macieira

Araújo, Leonardo; Stadnik, Marciel J.

doi:10.1590/s0006-87052013000200010

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Fungi with a hemibiotrophic lifestyle usually develop specialized structures called appressoria. The appressorium is a structure specialized in pathogen establishment during penetration; therefore, some species of the genus Colletotrichum depend on this structure because they penetrate the host tissue directly (Araujo and Stadnik, 2013). However, even in the Colletotrichum species that directly penetrate the epidermal cells, formation of appressoria is not necessary (Moraes et al ., 2013).…”

Section: Discussionmentioning

confidence: 99%

Colletotrichum siamense is the main aetiological agent of anthracnose of avocado in south‐eastern Brazil

et al. 2020

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The avocado (Persea americana) is an economically important fruit in several regions around the world (Perkins et al., 2019). Its cultivation mainly takes place in regions of tropical and subtropical climates (Sharma et al., 2017). The avocado has high nutritional value because it is rich in vitamins A, C, E, and B complex, and it has high contents of carbohydrates, proteins, fibre, and monounsaturated fats (Daiuto et al., 2013). The world production of avocados in 2017 was 5,924,398 tonnes, of which Brazil's production was 213,041 tonnes (http://www.fao.org/). Despite advances in the chain of production of this fruit, its cultivation is affected by postharvest diseases, of which anthracnose is the most important (Campos-Martínez et al., 2016). Anthracnose symptoms are characterized by the formation of round lesions, which are initially brown, but subsequently grow and become dark brown to black. As well as on fruits, symptoms occur on stems, branches, and leaves (Fuentes-Aragón et al.

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Section: Discussionmentioning

confidence: 99%

Colletotrichum siamense is the main aetiological agent of anthracnose of avocado in south‐eastern Brazil

et al. 2020

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“…In a favorable environment for their development, the conidia germinate, producing the appressorium at the end of the germ tube or at the end of the hyphae of the mycelium, which are differentiated structures used to force entry into the surface of the plant. Thus, the fungus penetration into the host tissue, what follows with tissue colonization with rapid hyphae growth [4]. The disease mainly affects the fruits, causing necrotic lesions of circular shape, with dark coloration and variable diameters, from which a mucilaginous mass of orange color evolves, i.e.…”

Section: Introductionmentioning

confidence: 99%

Biochemical analysis of antimicrobial peptides in two different Capsicum genotypes after fruit infection by Colletotrichum gloeosporioides

et al. 2019

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There are several phytosanitary problems that have been causing serious damage to the Capsicum crops, including anthracnose. Upon attack by certain pathogens, various protein molecules are produced, which are known as proteins related to pathogenesis (PR proteins), including antimicrobial peptides such as protease inhibitors, defensins and lipid transfer proteins (LTPs). The objective of this work is to identify antimicrobial proteins and/or peptides of two genotypes from Capsicum annuum fruits infected with Colletotrichum gloeosporioides. The fungus was inoculated into Capsicum fruits by the deposition of a spore suspension (106 conidia ml−1), and after 24 and 48 h intervals, the fruits were removed from the humid chamber and subjected to a protein extraction process. Protein analysis of the extracts was performed by tricine gel electrophoresis and Western blotting. The distinctive bands between genotypes in the electrophoresis profiles were subjected to mass spectrometry sequencing. Trypsin inhibition assays, reverse zymographic detection of protease inhibition and β-1,3-glucanase activity assays were also performed and extracts were also tested for their ability to inhibit the growth of C. gloeosporioides fungi ‘in vitro’. There were several low molecular weight proteins in all treated samples, and some treatments in which antimicrobial peptides such as defensin, lipid transfer protein (LTP) and protease inhibitor have been identified. It was shown that the green fruits are more responsive to infection, showing the production of antimicrobial peptides in response to injury and inoculation of the fungus, what did not occur in ripe fruits under any treatment.

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“…(UFLA 39). The presence of CATs in species of Colletotrichum genus has been reported in common bean (Barcelos et al, 2014;Mota et al, 2016;Pinto et al, 2012) and apple (Araújo & Stadnik, 2013;Gonçalves & Stadnik, 2012).…”

Section: Understanding This Relationship Might Have Important Implicamentioning

confidence: 87%

Investigating variability and behaviour of Colletotrichum gloeosporioides strains from lesions of coffee blister spot

Pereira¹,

Souza²,

Pereira³

et al. 2019

Journal of Phytopathology

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Coffee blister spot has been associated with species from the Colletotrichum genus, but there is no information on the variability of isolates present on leaf lesions. This study evaluated a population of Colletotrichum gloeosporioides strains from blister spot lesions in Coffea arabica. Colletotrichum spp. isolates were collected from blister spot lesions on leaves of coffee trees from Catuaí and Topázio cultivars (Coffea arabica). Monosporic cultures were obtained from colonies with sporulation. A pathogenicity test was carried out by inoculation of pathogens on the leaves of young coffee plants. C. gloeosporioides strains were characterized by morphologial, cytological and physiological analyses. The molecular analysis was carried out using Inter‐Retrotransposon Amplified Polymorphism (IRAP) markers. C. gloeosporioides strains showed no pathogenicity on coffee plants and presented a wide variability in all traits evaluated. The presence of sexual strains, formation of CATs (conidial anastomosis tubes) among conidial strains and high mycelial compatibility among strains observed suggest the occurrence of sexual and asexual recombination. The role of these C. gloeosporioides strains on the lesions of coffee plant leaves is unclear.

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Múltiplos apressórios e tubos de anastomoses conidiais no processo infeccioso de Colletotrichum gloeosporioides em macieira

Cited by 8 publications

References 11 publications

Colletotrichum siamense is the main aetiological agent of anthracnose of avocado in south‐eastern Brazil

Colletotrichum siamense is the main aetiological agent of anthracnose of avocado in south‐eastern Brazil

Biochemical analysis of antimicrobial peptides in two different Capsicum genotypes after fruit infection by Colletotrichum gloeosporioides

Investigating variability and behaviour of Colletotrichum gloeosporioides strains from lesions of coffee blister spot

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