rhizosphere microbiome

Roles of arbuscular mycorrhizal fungi in plant growth and disease management for sustainable agriculture

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Arbuscular mycorrhizal fungi are beneficial fungi that live in plant roots and form a mutually beneficial relationship with plants. These fungi help plants absorb more nutrients and water from the soil, strengthen their natural defenses against diseases and pests, and work together with other helpful soil bacteria to create disease-suppressive soil. This makes AMF a promising natural alternative to chemical pesticides and fertilizers for sustainable agriculture.

Pathogen Identification, Antagonistic Microbe Screening, and Biocontrol Strategies for Aconitum carmichaelii Root Rot

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Aconitum carmichaelii is a traditional Chinese medicinal plant that has become increasingly prone to root rot disease due to continuous farming in Yunnan. Researchers identified multiple disease-causing pathogens and discovered that beneficial bacteria called Bacillus can both fight these pathogens and improve plant health. One particularly effective strain enhanced soil quality and increased the plant’s natural defenses, achieving over 50% disease control without chemical pesticides.

A tale for two roles: Root-secreted methyl ferulate inhibits P. nicotianae and enriches the rhizosphere Bacillus against black shank disease in tobacco

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Tobacco plants release a natural chemical called methyl ferulate from their roots that has a powerful two-pronged defense against a devastating soil disease called black shank. First, the methyl ferulate directly kills the fungus by disrupting its energy production. Second, it attracts beneficial bacteria called Bacillus to the soil around the roots, which further fight the disease. Scientists found they could boost this defense by engineering a tobacco gene that produces more methyl ferulate, making plants much more resistant to infection. This discovery offers farmers an affordable, natural way to control soil diseases without synthetic chemicals.

Bacterial community shifts in Fusarium-induced avocado root rot and the antagonistic potential of Bacillus siamensis NB92

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Avocado plants are threatened by a fungal disease called root rot that damages roots and reduces fruit production. Researchers discovered that when avocado roots become diseased, the beneficial bacteria in the soil around the roots decrease significantly. They isolated a beneficial bacterium called Bacillus siamensis NB92 from healthy avocado soil that can fight against the disease-causing fungus by producing special compounds. When applied to diseased soil, this bacterium reduced the fungal pathogen and protected avocado stems from damage, offering a natural alternative to chemical treatments.

Effects of Spent Mushroom Substrate Treated with Plant Growth-Promoting Rhizobacteria on Blueberry Growth and Soil Quality

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This study shows that mushroom farming waste (spent mushroom substrate) can be recycled into a beneficial fertilizer by treating it with beneficial bacteria called plant growth-promoting rhizobacteria. When this treated waste is used to grow blueberries, the plants grow better with higher survival rates and produce more chlorophyll. The treatment also improves soil quality by making nutrients more available to plants and changing the beneficial microorganism community in the soil.

Effect of mining activities on the rhizosphere soil bacteria of seven plants in the iron ore area

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Iron ore mining damages soil and contaminates it with heavy metals, disrupting the beneficial bacteria that live around plant roots. This study examined seven plants growing in a mining area and found that each plant attracted different types of bacteria to survive the harsh conditions. Some bacteria help plants resist metal toxicity through various mechanisms. Understanding which bacteria naturally thrive in contaminated soils could help restore degraded mining areas.

Antifungal and other bioactive properties of the volatilome of Streptomyces scabiei

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Researchers discovered that Streptomyces scabiei, a bacterium known for causing common scab disease on potatoes and other root vegetables, produces various airborne chemicals with surprising benefits. Using advanced laboratory techniques, scientists identified 36 different volatile compounds from this bacterium, many of which can kill harmful fungi and potentially help plants grow better. While traditionally viewed as purely harmful, these findings suggest the bacterium may actually serve a more complex role in soil, sometimes protecting crops from more dangerous diseases.

Movement of bacteria in the soil and the rhizosphere

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Bacteria in soil move in many different ways to find food and avoid danger. Some swim using tiny whip-like flagella, others slide across surfaces, and many hitch rides on fungi or get transported by tiny predatory organisms. The ways bacteria move depend heavily on soil moisture, pore structure, and interactions with other microorganisms. This movement affects nutrient cycling and soil productivity, making it important for agriculture and ecosystem health.

Analysis of the Differences in Rhizosphere Microbial Communities and Pathogen Adaptability in Chili Root Rot Disease Between Continuous Cropping and Rotation Cropping Systems

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Rotating crops (chili with cotton) instead of continuously planting chili improves soil health by increasing helpful bacteria like Bacillus and reducing harmful fungi like Fusarium that cause root rot disease. Researchers studied how different cropping systems change the mix of microorganisms in soil around plant roots and identified two main disease-causing fungi. This research shows that crop rotation is a natural, chemical-free way to prevent chili disease and maintain productive farmland.

Biology and Application of Chaetomium globosum as a Biocontrol Agent: Current Status and Future Prospects

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Chaetomium globosum is a fungus that can protect crops from various plant diseases by producing toxic compounds and parasitizing harmful pathogens. It also helps plants defend themselves naturally and improves soil health by promoting beneficial microorganisms. This makes it a promising alternative to chemical pesticides for sustainable farming, though more research is needed to optimize its effectiveness in real field conditions.

Research Keyword: rhizosphere microbiome