Alternaria Spot
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. âConidial production and reaction of Alternaria alternata f. sp. citri to plant extractsâ / Conidial production and reaction of Alternaria alternata f. sp. citri to plant extracts
Este trabalho objetivou comparar as metodologias existentes para a produÃÃo de conÃdios de A. alternata de dois isolados de tangerina Ponkan, um de limÃo Cravo, dois de laranja PÃra e um de tangor Murcott e selecionar extratos de plantas potencialmente Ãteis para o controle da mancha marrom de Alternaria de tangor Murcott, uma doenÃa amplamente dissem
Publicado em: 2008
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14. Aspectos químicos envolvidos nas interações de Citrus com fitopatógenos / CHEMICAL ASPECTS RELATED TO THE INTERACTION BETWEEN Citrus PLANTS AND PHYTOPATOGENIC FUNGI
This present thesis describes the development of analytical methodologies involving the HPLC-PDA-MS/MS coupling to verify the production of both polar and non-polar metabolites in orange trees produced by grafting Citrus sinensis onto Citrus limonea. By the use of such kind of method, it was possible to verify the production of both polymethoxy and glycosyl
Publicado em: 2007
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15. Resistence to leprosis and alternaria brown spot in citrus / Resistencia a leprose e a mancha marrom de alternaria em citros : caracterização de hibridos, herança, mapeamento genetico e expressão genica
A leprose dos citros e a mancha marrom de Alternária são importantes doenças da citricultura. O conhecimento dos mecanismos genéticos envolvidos nas resistências apresentadas por algumas espécies e híbridos de citros a estas doenças é de fundamental importância para o desenvolvimento de estratégias para o melhoramento genético visando à utiliza�
Publicado em: 2005
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16. Epidemiologia da Alternariose e resistência de cultivares em brássicas sob diferentes sistemas de cultivo
Cabbage (Brassica oleracea var. capitata ), cauliflower (Brassica oleracea var. botrytis), Chinese cabbage (Brassica pekinnensis) and broccoli (Brassica oleracea var. italica) have high economic expression in the Agreste region in the State of Pernambuco, Brazil. However, the occurrence of foliar diseases such as Alternaria black spot, caused by Alternaria b
Publicado em: 2003
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17. Avaliação de danos e efeito de variáveis ambientais na mancha de alternaria (Alternaria helianthi) em Girassol. / Damage assessment and effect of environmental variables on alternaria leaf spot (Alternaria helianthi) in sunflower.
The development and implementation of integrated disease-management system on sunflower (Helianthus annuus) require precise and accurate information on the damage caused by Alternaria leaf spot (Alternaria helianthi). The objectives of this thesis were: to develop and to validate a diagrammatic scale for Alternaria leaf spot; to determine the influence of te
Publicado em: 2002
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18. Fungi Isolated from Tobacco Leaves and Brown-Spot Lesions Before and After Flue-Curing1
Discs of tissue excised from ripe nonflue-cured and flue-cured tobacco leaves, harvested on six dates and cultured on three selective media, yielded 21 and 24 genera of fungi, respectively. Of 5,094 fungi isolated from 3,240 pieces of nonfluecured leaf tissue, 89.5% comprised five genera, Alternaria, Cladosporium, Epicoccum, Trichoderma, and Nigrospora. Of 2
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19. Mouse Toxicity of Fungi of Tobacco1
A bioassay for fungal toxins based on the intraperitoneal injection of test materials into mice was used to screen 976 cultures isolated from tobacco and grown in a high-protein baby cereal and also to determine whether samples of tobacco damaged by fungi are more toxic than samples of apparently sound tobacco. Of 236 fungal isolates from noncured tobacco, 7
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20. Circular DNA Plasmid in the Phytopathogenic Fungus Alternaria Alternata: Its Temperature-Dependent Curing and Association with Pathogenicity
We found the presence of plasmid DNA in strain T88-56 of the Japanese pear pathotype of Alternaria alternata, which causes black spot of certain cultivars of Japanese pear by producing host-specific AK-toxin. The plasmid, designated pAAT56, was identified to be an ~5.4-kilobase (kb) circular molecule by electron microscopic observation and restriction endonu
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21. 7-Dehydrobrefeldin A, a naturally occurring brefeldin A derivative, inhibits secretion and causes a cis-to-trans breakdown of Golgi stacks in plant cells.
7-Dehydrobrefeldin A (7-oxo-BFA) is a brefeldin A (BFA) analog that, like BFA, is a potent phytotoxin of Alternaria carthami, a fungal pathogen of safflower (Carthamus tinctorius L.) plants. Both BFA and 7-oxo-BFA have been shown to be causal agents of the leaf spot disease of these plants. We have investigated the effects of 7-oxo-BFA on the secretion and t