Alternaria alternata

Synergistic curative effects of Trichoderma hamatum and Rumex dentatus against Alternaria alternata, the causal agent of tomato leaf spot disease

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This research discovered that combining a beneficial fungus called Trichoderma hamatum with an extract from Rumex dentatus plant effectively controls tomato leaf spot disease. When used together, these natural treatments reduced disease by over 88% and even outperformed commercial fungicides. The combined treatment also boosted plant health by increasing growth and natural defense mechanisms, offering farmers an affordable and environmentally safe alternative to chemical pesticides.

Exogenous L-Arginine Enhances Pathogenicity of Alternaria alternata on Kiwifruit by Regulating Metabolisms of Nitric Oxide, Polyamines, Reactive Oxygen Species (ROS), and Cell Wall Modification

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Researchers discovered that a specific nutrient called L-arginine paradoxically makes a fungus that causes black spot on kiwifruit more dangerous at low concentrations. The fungus uses this amino acid to trigger multiple survival mechanisms including producing protective molecules and enzymes that break down plant cell walls. However, at higher concentrations, L-arginine actually inhibits the fungus, suggesting it could be used as part of a disease control strategy.

Sweet Pepper cv. Lai Lai Ripeness Stage Influences Susceptibility to Mycotoxinogenic Alternaria alternata Causing Black Mold

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This research shows that green and red peppers can both develop black mold caused by a fungus called Alternaria alternata, but at different rates depending on temperature. Red peppers are more susceptible to severe infection at room temperature, while both types are similarly affected during cold storage. Importantly, infected peppers can produce toxins harmful to human health, emphasizing the need for preventing fungal infection in pepper crops before harvest and storage.

2-Nonanol produced by Bacillus velezensis EM-1: a new biocontrol agent against tobacco brown spot

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Researchers discovered that a beneficial bacterium called Bacillus velezensis produces a natural compound called 2-nonanol that effectively kills the fungus causing brown spots on tobacco leaves. This compound works by disrupting the fungus’s ability to obtain energy and handle stress. Testing on tobacco leaves showed that 2-nonanol could significantly reduce disease development. This discovery offers a promising environmentally-friendly alternative to chemical fungicides for protecting tobacco crops.

The Brief Case: Cutaneous ulceration associated with acalabrutinib treatment

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A 72-year-old patient being treated with acalabrutinib for blood cancer developed a slowly growing skin ulcer on the thigh. Testing identified a fungal infection caused by Alternaria alternata, a mold found in soil and air. The patient was successfully treated with an antifungal medication called posaconazole, with the ulcer healing over one month. This case highlights that doctors should check for fungal infections in chronic skin wounds of patients taking BTK inhibitor medications.

Research Keyword: Alternaria alternata

Synergistic curative effects of Trichoderma hamatum and Rumex dentatus against Alternaria alternata, the causal agent of tomato leaf spot disease

Exogenous L-Arginine Enhances Pathogenicity of Alternaria alternata on Kiwifruit by Regulating Metabolisms of Nitric Oxide, Polyamines, Reactive Oxygen Species (ROS), and Cell Wall Modification

Sweet Pepper cv. Lai Lai Ripeness Stage Influences Susceptibility to Mycotoxinogenic Alternaria alternata Causing Black Mold

2-Nonanol produced by Bacillus velezensis EM-1: a new biocontrol agent against tobacco brown spot

The Brief Case: Cutaneous ulceration associated with acalabrutinib treatment