Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties
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 H...
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todo:paper_0301486X_v157_n3_p291_Rodriguez2023-10-03T15:18:33Z Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties Rodríguez, M.A. Venedikian, N. Bazzalo, M.E. Godeas, A. 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 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. Fil:Rodríguez, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Venedikian, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bazzalo, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Godeas, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0301486X_v157_n3_p291_Rodriguez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 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 |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Rodríguez, M.A. Venedikian, N. Bazzalo, M.E. Godeas, A. |
| author_facet |
Rodríguez, M.A. Venedikian, N. Bazzalo, M.E. Godeas, A. |
| author_sort |
Rodríguez, M.A. |
| title |
Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties |
| title_short |
Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties |
| title_full |
Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties |
| title_fullStr |
Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties |
| title_full_unstemmed |
Histopathology of Sclerotinia sclerotiorum attack on flower parts of Helianthus annuus heads in tolerant and susceptible varieties |
| title_sort |
histopathology of sclerotinia sclerotiorum attack on flower parts of helianthus annuus heads in tolerant and susceptible varieties |
| url |
http://hdl.handle.net/20.500.12110/paper_0301486X_v157_n3_p291_Rodriguez |
| work_keys_str_mv |
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