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Abstract:

Sunflower head rot is a major disease caused by Sclerotinia sclerotiorum. Sunflower varieties which are tolerant to the fungus have been developed. The changes occurring in flower parts at different times after inoculation with pathogen ascospores were studied for two sunflower varieties (tolerant HA 302 and susceptible HA 89). In variety HA 302 there was cell collapse, changes in cell wall composition, and an increase in phenolic compounds in the tissues of corolla and style, which prevented the pathogen from advancing. This response was weaker in susceptible variety HA 89, and occurred only in the style, so did not stop the pathogen from developing and reaching the ovary. Phenolic compounds were found in HA 302 corolla and style tissues only when the pathogen was present, constituted an induced response that prevented further development of the fungus. Principal component analysis (PCA) showed that at the beginning of the infection there was no difference in behavior between the two varieties. The difference arose during the final observation times, when in variety HA 89, the pathogen colonized ovary, style and base of filaments and produced noticeable colonization of the corolla.

Registro:

Documento: Artículo
Título:Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties
Autor:Rodríguez, M.A.; Venedikian, N.; Bazzalo, M.E.; Godeas, A.
Filiación:Depto. de Biodiversidad Y Biol. Exp., Fac. de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Argentina
ZENECA SAIC, División Agrícola, Centro de Investigaciones Balcarce, Buenos Aires, Argentina
Palabras clave:Histopathology; Sclerotinia sclerotiorum; Susceptible and tolerant varieties of sunflower; Corolla; Fungi; Helianthus; Helianthus annuus; Sclerotinia; Sclerotinia sclerotiorum; phenazine derivative; safranin t; Argentina; article; Ascomycetes; chemistry; comparative study; cytochemistry; flower; genetic predisposition; growth, development and aging; microbiology; plant disease; principal component analysis; randomization; sunflower; ultrastructure; Argentina; Ascomycota; Flowers; Genetic Predisposition to Disease; Helianthus; Histocytochemistry; Phenazines; Plant Diseases; Principal Component Analysis; Random Allocation
Año:2004
Volumen:157
Número:3
Página de inicio:291
Página de fin:302
DOI: http://dx.doi.org/10.1023/B:MYCO.0000024177.82916.b7
Título revista:Mycopathologia
Título revista abreviado:Mycopathologia
ISSN:0301486X
CODEN:MYCPA
CAS:Phenazines; safranine T, 477-73-6
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0301486X_v157_n3_p291_Rodriguez

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Citas:

---------- APA ----------
Rodríguez, M.A., Venedikian, N., Bazzalo, M.E. & Godeas, A. (2004) . Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties. Mycopathologia, 157(3), 291-302.
http://dx.doi.org/10.1023/B:MYCO.0000024177.82916.b7
---------- CHICAGO ----------
Rodríguez, M.A., Venedikian, N., Bazzalo, M.E., Godeas, A. "Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties" . Mycopathologia 157, no. 3 (2004) : 291-302.
http://dx.doi.org/10.1023/B:MYCO.0000024177.82916.b7
---------- MLA ----------
Rodríguez, M.A., Venedikian, N., Bazzalo, M.E., Godeas, A. "Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties" . Mycopathologia, vol. 157, no. 3, 2004, pp. 291-302.
http://dx.doi.org/10.1023/B:MYCO.0000024177.82916.b7
---------- VANCOUVER ----------
Rodríguez, M.A., Venedikian, N., Bazzalo, M.E., Godeas, A. Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties. Mycopathologia. 2004;157(3):291-302.
http://dx.doi.org/10.1023/B:MYCO.0000024177.82916.b7