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Showing 1 to 18 of 18 for “"Ascospores"”.
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Impact of Meteorological Conditions and Maturity of Perithecia on the Release of Fusarium graminearum Ascospores
… the fungal plant pathogen Fusarium graminearum. Ascospores of the fungus are released from perithecia on the residues of corn and small grains and can be transported long distances (>500 m) through the atmosphere. The overall objective of this work was to assess the influence of meteorological …
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DISPERSAL GRADIENTS AND DEPOSITION EFFICIENCY OF VENTURIA INAEQUALIS ASCOSPORES AND THEIR RELATIONSHIP TO LESION DENSITIES (APPLE SCAB DISEASE, SPORE DISPERSAL, TRAPPING)
<p>The airborne dispersal of Venturia inaequalis ascospores and Lycopodium sp spores from a point source was examined in an apple orchard. Twenty-five volumetric spore traps were constructed, and a system developed that governed intervals of trap operation by leaf wetness. The estimated inoculum …
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PREDICTING POTENTIAL ASCOSPORE DOSE OF VENTURIA INAEQUALIS (CKE) WINT IN COMMERCIAL APPLE ORCHARDS OF NEW HAMPSHIRE (MODELING, EPIDEMIOLOGY, DISEASE MANAGEMENT)
… affecting the number of Venturia inaequalis ascospores per m('2) orchard floor per season (PAD) in New Hampshire apple orchards. PAD was calculated as the product of scab lesions per m('2) leaf tissue at leaf fall, pseudothecia per lesion, asci per pseudothecium, the proportion of the orchard …
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Epidemiological studies on primary inoculum of Venturia inaequalis and V. asperata for apple scab management
… days, ii) to understand the aerial dispersal of ascospores with the under-canopy irrigation, and iii) to identify the conditions of maturation of pseudothecia and ascospore discharge of V. asperata. The effect of irrigation was evaluated comparing irrigated and non-irrigated leaf litter. …
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Monitoring and Predicting the Long Distance Transport of Fusarium graminearum, Causal Agent of Fusarium Head Blight in Wheat and Barley
… from both substrate types and allowed to release ascospores every 24 hours. Perithecia generated from artificial (carrot agar) and natural (corn stalk) substrates released a mean of 104±5 and 276±16 ascospores, respectively. A volumetric spore trap was placed inside a 3,716 m2 clonal source of …
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The systematics of Leptosphaeria species found on the Rosaceae
… with scleroplectenchymatous wall cells and ascospores which are fusiform, 3-to-multiseptate remain important in delimiting the genus. Anamorphs were not considered because only type or herbarium specimens were studied.
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The chemotaxonomy of the fungal genus Endothia fr.
… examined. Those species with 2-celled, ovoid ascospores produced valsoid stromata, while organisms associated with nonseptate, allantoid ascospores formed diatrypoid stromata. Pseudoparenchymatous tissue was observed along the edge of the stroma, while prosenchyma was confined to the stromatic …
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GEOTRICHUM GALACTOMYCETUM: INTRASPECIFIC PHYSIOLOGICAL DIVERSITY AND BIOTECHNOLOGICAL POTENTIAL OF SIX STRAINS ISOLATED FROM POULTRY MANURE
… sexual reproduction via croziers and ascospores. In three strains, the presence of blastoconidia was noted and was dependent on time and medium for growth. Temperature studies indicated three distinct groups. Strains 13-02 and 13-06 were thermotolerant, 13-01, 13-03, and 13-04 were …
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Diversity, characteristics and potential for biological control of Sclerotinia sclerotiorum mycoviruses in New Zealand
… anastomosis and vertically transmitted through ascospores, with associated reduced virulence and malformed mitochondria of the host. Curing experiments revealed that Sclerotinia sclerotiorum mitovirus 3 (SsMV3/NZ1) played a significant role in the expression of the hypovirulent phenotype. Other …
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Novel mutations of the A mating-type idiomorph in Neurospora crassa
… near normal numbers of perithecia, but not ascospores, as the female. Sequencing analysis of the mt A-1 ORF of Am13 showed a frame shift mutation at amino acid 208 produced the mutant phenotype. The different phenotypes observed between Am99, Am13 and A wild-type strains can thus be ascribed …
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Studies in the Continuous Tower Fermentation of Alcohol
… as a whole. Eight isolates failed to produce ascospores. There were no changes in other characteristics. Because of the limited nature of the changes, it was concluded that mutation does not present a serious practical hazard to the operation of a tower fermenter for prolonged periods. The …
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Mite and fungal associates on mountain pine beetles attacking three pines species in northern Colorado
… the type of spores these carry were sexual (ascospores) which could benefit the fungus by increasing the proportion of recombinant sexual types on that species.
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PCR-Based Test for Differentiating Varieties of <i>Gaeumannomyces graminis</i>, The Take-All Pathogens
… hyphopodia type, size of perithecia, asci, and ascospores. These procedures are time-consuming, laborious, and often inconclusive. The objective of this study was to develop a rapid, simple, and specific method for differentiation of <I>G</I>. <I>graminis</I> varieties using PCR and …
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Is Fusarium meridionale more adapted as Gibberella Ear and Stalk Rot pathogen of maize than F. graminearum? Comparative epidemiology and toxigenicity
… higher numbers of macroconidia, perithecia, and ascospores in culture. All F. graminearum strains produced primarily DON in rice cultures or in wheat heads. On the other hand, F. meridionale was a more aggressive colonizer of maize silks and grew faster in culture. All F. meridionale strains …
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A circumscription of the earth tongue fungi class Geoglossomycetes
… from the sterile stipe, hyaline aseptate ascospores, and habitat in disturbed soil. This study included the first use of MCM7 in a phylogenetic study of Geoglossomycetes and the inclusion of Nothomitra in Geoglossomycetes greatly elucidated the basal relationships of the Geoglossomycetes …
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Breeding for resistance to clover rot (Sclerotinia spp.) in red clover breeding (Trifolium pratense)
… young plants are inoculated a with suspension of ascospores or mycelium fragments and incubated on an ebb and flow table covered with an opaque plastic cap. The disease is scored on a scale from 1 to 5 after incubation at 15°C during 10 days for mycelium fragment inoculation and 14 days for …
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An Evaluation of Mold in Public Schools in the City of Richmond, VA
Forty-three (43) schools in the City of Richmond were used for this study. The rooms in these schools that were selected for testing were those rooms in which complaints about air quality were made by school staff. Tests were done to find out the counts of the different mold species present in …