Sclerotia
Mostrando 13-24 de 46 artigos, teses e dissertações.
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13. Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents.
Abstract ? The objective of this work was to evaluate the effect of moisture and temperature on the development of Sclerotium rolfsii on soybean, corn, and wheat straw. Wheat straw produced the lowest number of sclerotia. Intermediate soil moisture level (70% of field capacity), and temperatures ranging between 25?30oC favored sclerotia development. No scler
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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14. Biological control of potato black scurf by rhizosphere associated bacteria
The present work was carried out to study the potential of plant rhizosphere associated bacteria for the biocontrol of potato black scurf disease caused by Rhizoctonia solani Khun AG-3. A total of twenty-eight bacteria isolated from diseased and healthy potato plants grown in the soil of Naran and Faisalabad, Pakistan were evaluated for their antagonistic po
Brazilian Journal of Microbiology. Publicado em: 2010-06
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15. Variabilidade genética de cepas de Aspergillus flavus isoladas de amendoim. / Genetic variability of Aspergillus flavus strains isolated from peanut.
This study aimed to draw a phylogenetic dendogram of Aspergillus flavus strains isolated from fresh harvested peanut from four regions of São Paulo state (Cafelândia, Jaboticabal, Rosália and Tupã), to determine the toxigenic potential and to group them regarding the sclerotia production pattern. The AFLP thecnique was used for genotypic characterization
Publicado em: 2009
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16. Geostatistic modeling of spatial distribution of common bean and soybean diseases and it relationship among soil fertility and mineral nutrition plants / Modelagem geoestatÃstica da distribuiÃÃo espacial de doenÃas do feijoeiro comum e da soja e sua relaÃÃo com a fertilidade do solo e nutriÃÃo mineral de plantas
The knowledge of the spatial dynamics of plant diseases and environmental factors that can influence an epidemic is very important for the definition of control strategies for efficient and sustainable management. Therefore, the objective of the present work was to evaluate the pattern of spatial distribution of white mold in two areas of winter common bean
Publicado em: 2008
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17. âEpidemiologia do mofo-cinzento (Amphobotrys ricini Buchw.) da mamoneira" / "Epidemiology of gray mold of castor bean"
The gray mold of castor bean, caused by Amphobotrys ricini, promotes rapid and complete destruction of castor bean bunches under high relative humidity and temperatures around 25 ÂC. Currently, it is the most important disease of the crop in some regions of Brazil. Thus, the objectives of this work were: to characterize cultures of A. ricini from different
Publicado em: 2008
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18. Potential do allyl isothiocyanate to control Sclerotium rolfsii and Sclerotinia sclerotiorum / Potencial do isotilcianato de alilo no controle de Sclerotium rolfsii e Sclerotinia sclerotiorum
The losses caused by fungi in the nursery of seedling production are high if the planting substrate is not treated for their eradication. Transplanting infected seedlings to field causes disease in the field besides infesting the soil with pathogens transported by the disease seedling, where the disease control becomes economically unviable. The objective of
Publicado em: 2006
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19. Synthesis and localization of a development-specific protein in sclerotia of Sclerotinia sclerotiorum.
A development-specific protein (SSP) makes up about 35 to 40% of the total protein in sclerotia of the fungus Sclerotinia sclerotiorum. The protein consists of three charge isomers, with one isomer making up 80 to 90% of the total. In vitro translation of poly(A)+ RNA isolated from cells in early stages of sclerotia formation revealed that 44% of the amino a
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20. TmkA, a Mitogen-Activated Protein Kinase of Trichoderma virens, Is Involved in Biocontrol Properties and Repression of Conidiation in the Dark
Trichoderma virens is a mycoparasitic fungus used in biocontrol of soilborne plant pathogens. It inhibits or kills plant-pathogenic fungi through production of antifungal antibiotics and parasitism of hyphae and sclerotia. Conidiation, or the production of asexual spores, an inducible process triggered by light or nutrient stress, is an important trait in su
American Society for Microbiology.
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21. Role of Two G-Protein Alpha Subunits, TgaA and TgaB, in the Antagonism of Plant Pathogens by Trichoderma virens
G-protein α subunits are involved in transmission of signals for development, pathogenicity, and secondary metabolism in plant pathogenic and saprophytic fungi. We cloned two G-protein α subunit genes, tgaA and tgaB, from the biocontrol fungus Trichoderma virens. tgaA belongs to the fungal Gαi class, while tgaB belongs to the class defined by gna-2 of Neu
American Society for Microbiology.
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22. Isolation and Characterization of Vacuoles from the Ergot Fungus Claviceps purpurea†
Protoplasts of Claviceps purpurea were prepared by treatment of mycelium with a lytic mixture of snail gut enzyme and cellulase from Trichoderma viride. Such protoplasts could be efficiently lysed by Triton X-100 treatment at high osmotic pressure without Ca2+ or Mg2+, allowing the release of intact vacuoles in high yields. Vacuoles obtained from cells grown
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23. Increase in Endogenous and Exogenous Cyclic AMP Levels Inhibits Sclerotial Development in Sclerotinia sclerotiorum
Growth and development of a wild-type Sclerotinia sclerotiorum isolate were examined in the presence of various pharmacological compounds to investigate signal transduction pathways that influence the development of sclerotia. Compounds known to increase endogenous cyclic AMP (cAMP) levels in other organisms by inhibiting phosphodiesterase activity (caffeine
American Society for Microbiology.
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24. Highly Efficient Mutagenesis of Claviceps purpurea by Using Protoplasts
Claviceps purpurea ATCC 20102, which is aconidial under laboratory conditions, was grown in submerged culture in the presence of mutagens and various nutritional additives. Protoplasts from such cultures were prepared and regenerated on solid medium to obtain colonies from single cell units. Frequencies of auxotrophs and high alkaloid producers were on the o