plant disease – Page 4

Two new Periconia species (Pleosporales, Ascomycota) in China

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Scientists discovered two new fungal species in China belonging to the genus Periconia. These fungi were found in different habitats: one in freshwater streams on decaying wood and another on dead corn leaves. By examining their physical features and DNA sequences, researchers confirmed they are distinct species that differ from known Periconia species. This discovery adds to our understanding of fungal diversity in Chinese ecosystems.

New records of powdery mildew fungi on stone fruits from India

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Researchers in Kashmir have identified three types of powdery mildew fungi that infect peach, plum, and apricot trees. These are new diseases documented in India and Asia for these important fruit crops. Scientists used both traditional microscopy and modern DNA sequencing to identify the fungi, providing farmers with accurate information needed to manage these plant diseases effectively.

Flood Inoculation of Fusarium eumartii in Tomato Seedlings: Method for Evaluating the Infectivity of Pathogen Spores

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This research paper presents a detailed procedure for testing how a fungus called Fusarium eumartii infects young tomato plants. Scientists use a simple flooding method to apply fungal spores to tomato seedlings and then measure how much damage occurs and how much fungus remains in the plant tissue. This standardized method helps researchers evaluate new fungicides and find ways to protect tomato crops from this harmful fungal disease.

Didymellaceae species associated with tea plant (Camellia sinensis) in China

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Researchers identified 25 different fungal species from the Didymellaceae family affecting tea plants across China, including 6 previously unknown species. These fungi cause leaf blight disease that damages tea crops. Tests showed that some species are more harmful than others, with Epicoccum anhuiense being the most damaging and Epicoccum puerense the least damaging to tea leaves.

Integrated genome and transcriptome analysis reveals pathogenic mechanisms of Calonectria eucalypti in Eucalyptus leaf blight

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Scientists studied a dangerous fungus called Calonectria eucalypti that kills eucalyptus trees worldwide. They sequenced the fungus’s entire genetic code and tracked which genes it turned on during infection. They found that the fungus uses different strategies at different stages of infection, starting with penetration, then breaking down plant cell walls, and finally stealing nutrients. This research helps us understand how the fungus works and develop better ways to protect eucalyptus plantations.

Sclerotinia rot of Zephyranthes candida caused by Sclerotinia sclerotiorum and Sclerotinia minor

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Researchers discovered that Zephyranthes candida, a popular ornamental plant, can be infected by two types of fungi: Sclerotinia sclerotiorum and Sclerotinia minor, causing a serious white mold disease. The study identified these pathogens and determined that they grow best in cool, acidic conditions with specific nutrients. This information will help gardeners and farmers develop better strategies to prevent and manage this disease on their plants.

The complete mitochondrial genome of the banana pathogen Fusarium oxysporum f. sp. cubense M5

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Researchers have completed the full genetic map of the mitochondria (energy-producing structures) of a fungus that causes a serious disease in banana plants. The study identified all the genes in this mitochondrial genome and discovered special structures called introns within two genes. This genetic information could help scientists develop better ways to detect and identify this harmful banana pathogen.

The small GTPases FoRab5, FoRab7, and FoRab8 regulate vesicle transport to modulate vegetative development and pathogenicity in Fusarium oxysporum f. sp. conglutinans

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Scientists studied three proteins (Rab GTPases) in a fungal pathogen that causes cabbage wilt disease. These proteins act like traffic controllers, directing materials within fungal cells to support growth and disease spread. By removing these genes one at a time, researchers found that all three proteins are essential for the fungus to infect plants, produce spores, and survive stress conditions. This research could eventually help develop new ways to control this destructive crop disease.

A Novel Subspecies of Didymella acutilobae Causing Leaf Spot in East Asian Hogweed

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Researchers identified a new fungal disease affecting East Asian hogweed, an edible herb used in traditional medicine. The disease, called leaf spot, was caused by a previously unknown subspecies of fungus named Didymella acutilobae subsp. heraclei. Using genetic analysis and laboratory testing, scientists confirmed this fungus is responsible for infecting hogweed plants in Korean fields. Understanding this pathogen is important for protecting this valuable medicinal plant.

Accessory Chromosome Contributes to Virulence of Banana Infecting Fusarium oxysporum Tropical Race 4

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Scientists studied a dangerous fungal disease that destroys banana crops by examining a special extra chromosome found in the pathogen Fusarium oxysporum Tropical Race 4. They created mutant fungi without this chromosome and found that while the mutants could still grow normally in the lab, they became much less dangerous to banana plants. This discovery shows that this particular chromosome contains genes that help the fungus attack and infect bananas, suggesting potential new ways to combat this devastating crop disease.

Research Keyword: plant disease