Partial resistance to fruit necrosis associated to Colletotrichum spp. among arabic coffee genotypes

Sera, Gustavo Hiroshi; Sera, Tumoru; Ito, Dhalton Shiguer; Azevedo, José Alves de; Filho, Claudionor Ribeiro; Mata, João Siqueira da

doi:10.1590/s1516-89132007000300005

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…Balady was of the highest tolerance according to the size of the anthracnose lesions initiated on the different fruits. These results were in agreement with reports in different parts of the world (Timmer and Brown, 2000;Peres et al, 2002;Afanador et al, 2003;Sera et al, 2007 andGonçalves-Vidigal et al, 2008).…”

Section: Discussionsupporting

confidence: 93%

Characteristics and Control of Colletotrichum gloeosporioides Isolates in Behera Governorate, Egypt

El-Argawy

2012

Egyptian Journal of Phytopathology

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ight isolates of Colletotrichum gloeosporioides were recovered from guava and banana fruits showed anthracnose symptoms collected from different orchards in Behera Governorate. Isolates were characterized according to types of colony colour, colony diameter, conidium shape and size, appressorium shape and size and the effect of different temperature degrees on isolates radial growth. The isolates showed mostly gray colony phenotype while the olive-gray and the dark-gray phenotypes were also existed in four out of the investigated eight isolates. Diameter of the developed colonies ranged between 80 and 85 mm. Conidia of the developed eight isolates were mostly monomorphic and exhibited cylindrical, hyaline conidia with size ranged between 14.5 and 19.1 µm for length and 4.4 and 6.5 µm for width. Clavate appressoria were recorded in all isolates. Irregular appressoria were also recorded accompanied with the clavate ones in five of the eight investigated isolates. The optimal temperature for radial growth was 25°C with rate of 8.0-8.37 cm, five days after inoculation. All isolates were pathogenic on different host species Guava cv. Balady, Apple cv. Golden Delicious, Banana cvs. Balady and Grantidin, Mango cv. Ewasy and Pepper cv. Balady. Apple fruits were the most susceptible for the infection by C. gloeosporioides isolates while pepper was the most tolerant for the infection. Moreover RAPD-PCR analysis using five random oligonucleotide primers revealed DNA fingerprints and considerable variations were revealed with primers tested. However, the RAPD-PCR phylogenetic analysis did not reveal known genetic entities for isolates from each guava and banana, since it did revealed two clusters for the highly virulent isolates and the moderately virulent isolates in the dendrogram of the tested C. gloeosporioides isolates. Anthracnose control of fruits by chitosan as a natural product was tested. The in vitro 2.5 % chitosan application significantly inhibited the growth of C. gloeosporioides isolates tested by 96.6 % on agar plates. The in vivo tests on fruits of different species, i.e. banana, mango, apple and guava confirmed the in vitro results. The chitosan treatment to artificially infected fruits reduced the development of symptoms, at the different chitosan concentrations, i.e. 1.5%, 2% and 2.5%. The 2.5% chitosan was the most affective concentration for anthracnose control in the different fruit species. The study supported the view that chitosan offers a safe alternative to synthetic fungicides in postharvest anthracnose diseases control and could be considered as a potential agrochemical of low environment impact.

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Section: Discussionsupporting

confidence: 93%

Characteristics and Control of Colletotrichum gloeosporioides Isolates in Behera Governorate, Egypt

El-Argawy

2012

Egyptian Journal of Phytopathology

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“…'IPR 100' presents good level of partial resistance (moderate resistance) to the symptoms of necrosis and mummification of fruits (Sera et al 2005, Sera et al 2007a). These symptoms have been associated with the attack of Colletotrichum spp.…”

Section: Other Traitsmentioning

confidence: 99%

IPR 100 - Rustic dwarf Arabica coffee cultivar with resistance to nematodes Meloidogyne paranaensis and M. incognita

Sera

Fazuoli

et al. 2017

Crop Breed. Appl. Biotechnol.

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“…In general, such symptoms are similar in all cashew hosts from different localities, but the isolates of the pathogen may vary in its degree of aggressiveness as well as in its cultural and morphological characters. Species concepts based on morphological criteria are generally broad for the genus Colletotrichum, and wide variations for cultural and morphological characters, pathogenicity and host range have been reported among isolates of C. gloeosporioides (Alahakoon and Brown, 1994;Gonçalves-Vidigal et al 2008;Jeffries et al, 1990;Skipp et al, 1995;Menezes and Hanlin, 1996a, b;Sera et al 2007). Sequence analyses of the intergenic transcribed spacers (ITS 1, ITS 2) and Domains (D1,D2) of large subunit (LSU) ribosomal DNA (rDNA) have been valuable for delineating isolates and species from this genus (Adaskaveg and Hartin, 1997;Forseille, 2007;Freeman et al, 2001;Johnston, 2000;Johnston and Jones, 1997;Moriwaki et al, 2002;Sherriff et al, 1994;Vinnere et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Colletotrichum isolates related to Anthracnose of cashew trees in Brazil: morphological and molecular description using LSU rDNA sequences

López

Lucas

2010

Braz. arch. biol. technol.

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Partial resistance to fruit necrosis associated to Colletotrichum spp. among arabic coffee genotypes

Abstract: ABSTRACT

Cited by 7 publications

References 3 publications

Characteristics and Control of Colletotrichum gloeosporioides Isolates in Behera Governorate, Egypt

Characteristics and Control of Colletotrichum gloeosporioides Isolates in Behera Governorate, Egypt

IPR 100 - Rustic dwarf Arabica coffee cultivar with resistance to nematodes Meloidogyne paranaensis and M. incognita

Colletotrichum isolates related to Anthracnose of cashew trees in Brazil: morphological and molecular description using LSU rDNA sequences

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