plant pathology – Page 6

Green Synthesized Copper-Oxide Nanoparticles Exhibit Antifungal Activity Against Botrytis cinerea, the Causal Agent of the Gray Mold Disease

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Scientists have developed tiny copper particles using environmentally friendly methods with beneficial fungi to fight gray mold, a devastating disease in vineyards and crops. These green-synthesized nanoparticles were more effective at stopping the fungus than commercial fungicides currently in use. The research shows this approach could be a sustainable alternative that reduces harmful chemicals used in agriculture while protecting crops more effectively.

Morpho-phylogenetic evidence reveals novel hyphomycetous fungi on medicinal plants in Southwestern China

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Researchers in China discovered 12 new species of fungi living on medicinal plants, along with several previously unreported fungal occurrences. These fungi were identified using both microscopic examination and DNA analysis. Some of these fungi can produce harmful toxins, while others produce beneficial compounds that affect medicinal plant quality. This research helps us better understand the invisible fungal world living on the plants we use for medicine.

Oxaloacetate anaplerosis differently contributes to pathogenicity in plant pathogenic fungi Fusarium graminearum and F. oxysporum

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Two important crop-destroying fungi, Fusarium graminearum and F. oxysporum, rely differently on a metabolic enzyme called pyruvate carboxylase to cause disease. Researchers found that removing this enzyme completely eliminates the ability of F. oxysporum to infect tomato plants by blocking its capacity to penetrate roots and break down plant cell walls. However, the same enzyme deletion has minimal effect on F. graminearum’s ability to infect wheat, suggesting these fungi have evolved different metabolic strategies for attacking their hosts.

Standardization of challenge inoculation protocols for artificial infection of Fusarium acutatum and Fusarium falciforme causing basal rot of onion

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This research develops standardized methods for infecting onion bulbs with fungal diseases in laboratory settings to test which onion varieties can resist the infection. Two Fusarium fungi species that cause onion basal rot were tested using five different inoculation techniques. The cotton swab method proved most effective and practical for screening large numbers of onion plants. These findings will help farmers and plant breeders develop onion varieties resistant to these economically important diseases.

Comparative genome analysis of patulin-producing Penicillium paneum OM1 isolated from pears

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This research examined the genetic makeup of a mold called Penicillium paneum that contaminates pears and apples by producing a toxic substance called patulin. Scientists sequenced the entire genome and identified all the genes responsible for patulin production. They found that this mold has 33 different gene clusters for producing various toxic compounds, with the patulin-producing genes being highly similar to those in other related molds. This genetic knowledge could help develop better strategies to prevent patulin contamination in fruit crops.

Identification and growth-promoting effect of Paecilomyces lilacinus a biocontrol fungi for walnut rot disease

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Scientists identified a beneficial fungus called Paecilomyces lilacinus from walnut soil that can fight walnut rot disease more safely than chemical fungicides. Testing showed this fungus not only kills the disease-causing pathogen but also boosts walnut seed germination and seedling growth by up to 98%. This natural solution could help walnut farmers protect their crops while avoiding harmful chemical pesticides.

Identification of Pseudocercospora mori as the causal agent of grey leaf spot disease in mulberry (Morus atropurpurea) from various localities in Guangdong Province, China

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This study identifies the fungus Pseudocercospora mori as the cause of a serious disease affecting mulberry leaves in southern China. Researchers used microscopy, genetic testing, and laboratory experiments to confirm that this pathogen damages mulberry plants and reduces the quality of leaves used in silk production. The study provides practical diagnostic tools to help farmers detect and manage this disease in their mulberry orchards.

Draft genome sequence of Neofusicoccum caryigenum associated with pecan leaf dieback

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Scientists have sequenced the genetic blueprint of a fungus causing pecan leaf dieback disease, an emerging problem in southeastern U.S. pecan orchards. The fungus, called Neofusicoccum caryigenum, causes pecan trees to lose their leaves and produce fewer nuts. This first-ever genetic map of the pathogen will help researchers understand how it works and develop better ways to manage the disease.

Antifungal mechanism of nanosilver biosynthesized with Trichoderma longibrachiatum and its potential to control muskmelon Fusarium wilt

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Researchers created tiny silver particles using a beneficial fungus to fight a serious disease that damages muskmelon plants. At low doses, these silver nanoparticles killed the disease-causing fungus while actually helping the melon plants grow better and germinate faster. The silver particles work by damaging the fungus’s cell structure and triggering harmful reactive oxygen species inside fungal cells, ultimately destroying them.

Heterologous expression of the hypovirus CHV1-EP713 full-length cDNA in Botrytis cinerea: transformation with Agrobacterium tumefaciens and evaluation of changes in the fungal phenotype

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Researchers successfully introduced a virus from chestnut blight fungus into gray mold fungus to reduce its ability to cause disease. The transformed fungus grew slower, produced fewer spores, and caused less damage to plants. This discovery suggests viruses could be used as natural biological control agents to protect crops from fungal diseases.

Research Topic: plant pathology