gene expression – Page 6

Upregulation of ACC deaminase gene in Bacillus velezensis UTB96 improved yield and shelf Life of Agaricus bisporus

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Researchers discovered that adding a beneficial bacteria called Bacillus velezensis UTB96 to mushroom growing substrates significantly improves both the amount of mushrooms produced and how long they stay fresh. When this bacteria was grown in a medium containing calcium chloride, it produced more of an enzyme called ACC deaminase that breaks down ethylene, a gas that causes mushrooms to age and brown. Mushrooms treated with this specially-prepared bacteria stayed fresher for three weeks in the refrigerator with minimal browning, and overall mushroom yield increased by up to 23%.

Aspergillus terreus sectorization: a morphological phenomenon shedding light on amphotericin B resistance mechanism

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When Aspergillus terreus fungi are grown in laboratory conditions for extended periods, they sometimes undergo changes that make them look different and behave differently. Scientists found that these changed strains become more susceptible to amphotericin B, a common antifungal drug. By studying the genes and proteins in both the original and changed strains, researchers discovered that special proteins called P-type ATPases appear to be responsible for the fungus’s natural resistance to this drug, offering new targets for developing better antifungal treatments.

Integrated Transcriptomics and Metabolomics Provide Insight into Degeneration-Related Molecular Mechanisms of Morchella importuna During Repeated Subculturing

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Morel mushrooms (Morchella importuna) lose quality when repeatedly grown from cultured samples, a process called strain degeneration. Scientists found that degenerated strains have lower levels of beneficial compounds called flavonoids, which normally protect mushroom cells from damage. By studying gene expression and metabolite changes, researchers identified a specific gene responsible for making these protective flavonoids, which becomes less active in degenerated strains. This research suggests that avoiding frequent reculturing and maintaining cold storage or adding antioxidants could help preserve healthy morel mushroom strains.

Vernicia fordii leaf extract inhibited anthracnose growth by downregulating reactive oxygen species (ROS) levels in vitro and in vivo

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Researchers found that leaves from the tung tree (Vernicia fordii) contain natural compounds that effectively kill a fungus (Colletotrichum fructicola) that damages oil tea plants. The extract works by increasing harmful oxidative stress in fungal cells and turning off genes the fungus needs to survive. This explains why farmers have successfully grown these trees together for centuries to naturally reduce disease.

Overexpression of efflux pump and biofilm associated genes in itraconazole resistant Candida albicans isolates causing onychomycosis

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Researchers studied why some fungal nail infections caused by Candida albicans stop responding to the antifungal drug itraconazole. They found that resistant fungal cells have higher activity of genes that pump the drug out of cells and produce slimy protective coatings called biofilms. These resistant fungi also formed less dense biofilms when the drug was present from the start. Understanding these resistance mechanisms could help develop new treatments by targeting the pump systems or breaking down the protective biofilm layers.

Anoectochilus roxburghii Extract Extends the Lifespan of Caenorhabditis elegans through Activating the daf-16/FoxO Pathway

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Researchers studied a traditional Asian orchid plant (Anoectochilus roxburghii) and found it can extend the lifespan of laboratory worms by about 16% and help them resist stress from UV light and heat. The plant works by activating a specific genetic pathway that increases the worm’s natural antioxidant defenses, protecting cells from damage. These findings suggest the plant could potentially be developed into anti-aging products for humans.

Volatile Metabolome and Transcriptomic Analysis of Kosakonia cowanii Ch1 During Competitive Interaction with Sclerotium rolfsii Reveals New Biocontrol Insights

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Researchers found that a bacterium called K. cowanii produces special gases (volatile organic compounds) that kill fungal plant diseases like those caused by Sclerotium rolfsii. When grown together with this fungus, the bacterium produces these toxic gases which inhibit fungal growth by up to 80%. The study identified specific genes the bacteria activate to produce these antifungal compounds, offering a natural alternative to chemical fungicides for protecting crops.

Inhibitive effect of Urginea epigea methanolic extract and silver/zinc oxide nanoparticles on Aspergillus and aflatoxin production

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Scientists tested a plant called Urginea epigea and special tiny particles made of silver and zinc to stop a dangerous fungus called Aspergillus flavus from growing and producing aflatoxins, which are harmful poisons found in food. When used at the right concentration, the plant extract completely stopped the fungus from growing. The treatment worked by turning off the fungus’s ability to make the poison by reducing the activity of specific genes. This natural approach could offer a safer alternative to chemical fungicides for protecting our food supply.

Citric Acid Induces the Increase in Lenthionine Content in Shiitake Mushroom, Lentinula edodes

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Shiitake mushrooms are prized for their unique flavor, which comes from a compound called lenthionine. This study found that treating shiitake mushrooms with citric acid (a common ingredient in food) can significantly increase the amount of lenthionine produced. The research identified the specific genes and enzymes responsible for this effect and determined the best conditions for the treatment, which could help mushroom producers create higher-quality, better-tasting products at lower cost.

Transcriptome analysis of Ochratoxin a (OTA) producing Aspergillus westerdijkiae fc-1 under varying osmotic pressure

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A fungus called Aspergillus westerdijkiae produces a toxic substance called Ochratoxin A (OTA) that commonly contaminates foods like coffee, grapes, and wheat. Researchers used advanced gene analysis techniques to understand how salt concentration affects the fungus’s ability to produce this toxin. They found that moderate salt levels actually increase OTA production, while very high salt levels activate defense mechanisms that reduce it. These findings could help develop better strategies to prevent this dangerous contamination in our food supply.

Research Topic: gene expression