Articles tagged with Plant Pathogens
A new study has found evidence of genetic resistance to beech leaf disease (BLD) in some American beech trees, which could lead to the development of breeding populations for resistance. Researchers found that trees with good resistance to BBD also showed reduced symptoms of BLD, suggesting a genetic link between the two diseases.
A study reveals that the Andes did not stop the spread of Phytophthora palmivora, a cacao killer, as it travels through Colombia's three main regions. The pathogen's genetic structure and virulence show no correlation, highlighting the need for alternative screening methods.
Researchers have discovered a new class of plant defense receptors that can limit blast pathogen attacks and introduce broader immunity into wheat, barley, and rice. By bioengineering these receptors, they aim to create a new frontline defense against the devastating fungal disease.
Researchers have identified three beneficial bacteria that not only delay the onset of tomato bacterial canker but also promote plant growth. These microbes, including Pantoea agglomerans and Pseudomonas marginalis, have shown promise in treating the disease and improving plant health.
A microscopic atlas reveals how citrus Huanglongbing disease develops over time, causing phloem cell death and callose deposition in leaves and fruit tissues. Roots experience starch depletion, driving root decay and nutrient deficiencies.
Researchers tracing the journey of Phytophthora infestans, a plant destroyer behind Ireland's Irish Potato Famine, explore its taxonomy and identification from early microscopy to genomic technologies. Advances in science strengthen efforts to monitor and manage destructive plant diseases.
Researchers found that powdery mildew disease caused by different fungi infects strawberries in North America and Europe differently, indicating the pathogens jumped hosts over millions of years. This discovery can aid understanding of plant diseases and their spread.
Researchers discovered that fungal effector proteins evolved from ancient antimicrobial proteins to weaken host immune systems and manipulate the surrounding microbiome. These findings provide new insights into how fungi attack both hosts and beneficial microorganisms, with potential applications in agriculture and medicine.
Researchers developed a hybrid engine to predict sugar beet disease by combining drone images, weather data, and qPCR-based airborne spore monitoring. The system reduced prediction error by up to 39% and provided accurate forecasts of disease severity.
Researchers discovered that high humidity induces the production of CYP707A3, breaking down ABA and promoting stomata opening to release water. Plants lacking this enzyme are more vulnerable to water-soaking. The study reveals a molecular defense mechanism against water accumulation in plants.
Researchers analyzed 48 isolates of P. griseola and found a potential symbiotic relationship between the fungus and endophytic bacterium Achromobacter xylosoxidans, influencing disease severity. The study sheds light on how the pathogen evolves and may point to new strategies for breeding disease-resistant crops.
Researchers sequenced the complete genome of Pseudocercospora cladosporioides, identifying key genes involved in degrading the olive tree's cell wall and inhibiting its resistance mechanisms. This breakthrough will aid in breeding resistant varieties and understanding fungus-olive tree interactions.
Researchers at Colorado State University have identified four Fusarium species causing potato dry rot in the San Luis Valley, including one not previously found in the US. This study will help improve disease diagnosis and monitoring, as well as guide cultivar selection and breeding for disease resistance.
A new international study reveals that the ancestors of modern crop viruses likely emerged before the last Ice Age, affecting both wild and cultivated plants. The viruses, spread by leaf-eating beetles, infect various crops and wild species, posing risks to agriculture and natural ecosystems.
Researchers discover that resistant soybean varieties actively recruit beneficial soil microorganisms to suppress the devastating soybean cyst nematode. These microbes can be transferred to soil to help defend susceptible soybeans, providing a promising new approach for sustainable crop protection.
Researchers at FABI define a conserved subset of Phytophthora RxLR effectors with short linear motifs embedded within folded WY domain cores. This arrangement preserves domain integrity while enabling potential interactions with host immune components, reframing pathogen strategies and challenging SLiM dogma.
Researchers at Colorado State University have found a way to boost plant growth while maintaining its immune system through hormone treatment, showing promise for increasing food production. The approach involves genetically manipulating phytohormone interactions to restore cell division and increase disease resistance.
Researchers have discovered a genetic region controlling resistance to Fusarium wilt Sub Tropical Race 4 (STR4) in a wild banana subspecies called Calcutta 4. This finding holds promise for developing sustainable and disease-resistant commercial banana varieties.
A new strain of yellow rust pathogen has broken down a key resistance gene, leaving over 50% of the UK's wheat acreage vulnerable. Researchers are racing against time to find new resistance genes and breed them into modern wheat varieties.
Researchers have identified novel sources of soybean resistance to cyst nematode that could help protect global soybean production. The study reveals a wealth of previously untapped genetic resistance to SCN by mining deep into soybean genomes.
Researchers discovered a previously unknown interplay between wheat's resistance genes and fungal disease factors. The study found that powdery mildew fungus overcomes resistance by modifying recognized effectors, but a new approach could slow down its development by combining targeted resistance genes.
A roundtable meeting in Morocco brought together experts to discuss precision breeding technologies for nutritional security and crop resilience. Precision breeding offers a targeted approach to improve crop genetics, addressing malnutrition and climate change impacts.
A new multiyear study reveals wheat disease losses totaling $2.9 billion in the US and Canada between 2018 and 2021. The top three yield-reducing pathogens were fusarium head blight, stripe rust, and leaf rust.
Researchers have discovered that Phytophthora infestans can quickly acquire and lose resistance to mefenoxam, a common fungicide used to manage the disease. The pathogen uses a defense mechanism known as pleiotropic drug resistance, which activates cellular pumps to eject the fungicide.
The third edition of Compendium of Cotton Diseases and Pests features significant updates and new content, including expanded focus on entomology and emerging diseases. Hundreds of new images enhance identification and diagnosis, making it a comprehensive guide for plant pathologists, agronomists, and growers.
The book explores lesser-known plant diseases that influenced human events, drawing from scientific insight and compelling narrative. Written for specialists and curious readers, it offers a new lens on plant pathology and environmental history.
The updated fourth edition of the Laboratory Guide for Identification of Plant Pathogenic Bacteria provides simplified identification methods and detailed protocols. The comprehensive volume covers conventional and cutting-edge methods, including molecular, serological, biochemical assays, to accurately identify bacterial plant pathogens.
Researchers discovered salicylic acid plays a central role in protecting potato roots from Spongospora subterranea, a soilborne pathogen causing powdery scab. The study used a cutting-edge 'hairy root' system to rapidly test root-pathogen interactions, providing vital insights for developing resistant potato varieties.
A fungal pathogen is causing cassava witches' broom disease to spread rapidly in Brazil and French Guiana, impacting food security and livelihoods. Researchers are racing against time to understand the extent of the threat and find a way to treat or prevent the disease.
A Kobe University team has identified a new molecule, solanoeclepin C, that plants secrete to attract soil microbes. This newly found compound is converted into hatching factors that cause potato cyst nematodes to hatch prematurely, potentially offering a novel approach to parasite control.
Researchers have identified a key player in the development of Fusarium head blight, a devastating disease that severely damages wheat and barley crops worldwide. The discovery of FgTPP1 could lead to the development of genetically engineered disease-resistant grains.
The latest focus issue of Molecular Plant-Microbe Interactions explores the molecular, cellular, and genomic details of cereal crop diseases, highlighting key research on plant-pathogen interactions. Groundbreaking work has advanced the field, offering new insights into disease resistance and management strategies.
Researchers developed high-resolution risk maps to predict where charcoal rot occurs in soybean fields. The maps use measurable soil characteristics to assess risk across the landscape and identify hotspots for targeted approaches to managing the disease.
Researchers found that pathogenic bacteria like Pseudomonas syringae produce glycosyrin, a molecule that blocks plant immune surveillance. Plants have evolved countermeasures to strip away sugars from flagellin, but this bacterial strategy disrupts these defenses and creates conditions favorable for bacterial growth.
A new study from the University of Oxford reveals that a molecule called glycosyrin, produced by the bacterium Pseudomonas syringae, mimics galactose to suppress plant immune responses. This finding has potential medicinal applications and highlights the complex strategies used by bacteria to manipulate host plants.
A new study confirms copper-based fungicides as a reliable solution for aerial stem rot in potatoes. The research found that copper fungicide treatments consistently slowed disease spread and improved yields over a 10-year period.
The Phytovirome Focus Issue addresses fundamental and translational aspects of phytovirome science, highlighting the transformative role of high-throughput sequencing technologies. Researchers discovered a remarkable diversity of viruses in plants, with complex communities interacting with hosts in both pathogenic and beneficial ways.
A Chinese Academy of Sciences research team has identified the first mechanism of citrus resistance to citrus greening disease and developed an AI-assisted therapeutic approach. The discovery addresses the challenge of naturally occurring resistant genes in citrus, offering hope for global agricultural sustainability.
A University of Maryland study reveals that young plants face a hidden trade-off between fighting disease and growing, leading to reduced reproductive fitness. Plants with stronger disease resistance as seedlings produce fewer flowers and seeds over their lifetime.
A team of scientists has discovered that the circadian clock plays a crucial role in regulating F. oxysporum's response to zinc starvation and controlling secondary metabolism, enhancing its virulence. The study provides new insight into host-pathogen interactions and could lead to innovative approaches for crop protection.
Researchers have developed an effective approach to tackle intestinal pathogens by administering oral vaccinations combined with harmless bacteria that starve out pathogenic microbes. This method has shown promising results in preventing colonization with salmonella and effectively tackling established E. coli bacteria.
A research team has identified a previously unknown defense mechanism in Pseudomonas syringae, enabling the bacterium to produce chemical compounds that attract amoebae, which are then killed by toxic substances produced by the bacteria. This 'chemical radar' system also helps the bacteria infect plants in the presence of predators.
Researchers have developed a novel approach to detect Fusarium wilt in tomato plants by analyzing subtle changes in water use, allowing for early detection before visual symptoms appear. This method provides a quantitative approach to assess disease severity, pathogen virulence, and plant susceptibility.
Researchers uncover a novel immune mechanism by which wheat tandem kinase proteins (TKPs) combat pathogen invasion, establishing a new paradigm for cooperation between TKPs and NLR proteins. The discovery offers a foundation for engineering crop varieties with broad-spectrum pathogen resistance.
Researchers at Martin-Luther-Universität Halle-Wittenberg have developed a new avenue to combat the Cucumber mosaic virus by directing the plant's natural defences. The RNA-based active agents have shown high efficacy in laboratory experiments, protecting 80-100% of treated plants from infection.
Researchers demonstrate a new technique for encapsulating beneficial bacteria that can be stored and applied to plants to improve growth and protect against pests. The technique enables customized probiotics for plants, allowing farmers to use these bacteria in conjunction with agrochemicals.
Researchers discovered that erucamide inhibits Type III Secretion injectisome assembly in Gram-negative bacteria, enhancing plant immunity and reducing disease susceptibility. Exogenous application of erucamide protects crops from bacterial diseases, offering a potential biopesticide for sustainable agriculture.
A study by researchers at the University of Kentucky has found that plant immune responses and human neurological health share common biochemical pathways. This discovery highlights the importance of plant-based diets for essential vitamins and amino acids, and suggests a link between disruptions in amino acid metabolism and human health.
A team of researchers has identified a calcium-activated bi-kinase module as the central molecular switch driving plant immune response. This discovery sheds light on how plants transmit immune signals from cell to cell without disrupting other signalling chains, using reactive oxygen species and calcium signals.
Researchers at North Carolina State University suggest that the Irish potato famine pathogen, Phytophthora infestans, originated in the South American Andes Mountains. The study compared genetic material from P. infestans with those of close relative pathogens and found distinct differences between the two.
Researchers have identified the pathogens and diagnostic tests for the two diseases, revolutionizing cassava disease management in Latin America, the Caribbean, and Southeast Asia. The study, published in peer-reviewed journals, marks a significant milestone in fighting the spread of these devastating diseases.
The Compendium of Rose Diseases and Pests, Third Edition, is a comprehensive guide to diagnosing diseases, identifying pests, and expanding expertise in rose health management. Edited by industry experts, the book features over 50 contributing authors and provides practical guidance for students, researchers, educators, and professionals.
Researchers at Salk Institute discovered plant cells enter an immune state to fight pathogens, using Primary IMmunE Responder (PRIMER) cells as hubs for the immune response. These cells are surrounded by bystander cells that enable long-distance cell-to-cell communication.
A study by North Carolina State University reveals the global spread of powdery mildew fungus in blueberries, with a cost range of $47 million to $530 million annually to the industry. The disease is caused by the Erysiphe vaccinii fungus and has been found on multiple continents since its introduction in 2012.
The Arkansas Clean Plant Center is leading a global effort to remove over 120 'phantom agents' from pathogen regulatory lists. These outdated agents impede access to clean plant materials, hindering crop production and food security. The center's efforts aim to streamline global germplasm exchange using modern molecular techniques.
Research found that pectin lyase PsPL1 induces soybean cell death and immune responses, bypassing regulation by LRR proteins. Degradation products of pectin oligosaccharides activate plant resistance through recognition by distinct cell membrane receptors.
A new study finds that disease-causing bacteria can infect a wide range of plant species, including non-flowering plants, using a common set of pathogenicity factors. The research suggests that the toxin syringomycin interferes with cell membranes across diverse plant species.
Researchers used a century-old grapevine cutting to reconstruct the history of Pierce's disease in California, finding that the pathogen arrived in the US nearly 150 years earlier than previously thought. The study suggests multiple introductions of the pathogen and potential genetic variations may impact disease management.
A study published in PLOS Biology found that the fungal pathogen causing coffee wilt disease took up segments of DNA from a related species, F. oxysporum, contributing to successive outbreaks. This horizontal gene transfer event likely contributed to the repeated emergence of the disease on the African continent.
A research team has developed three new rice varieties resistant to bacterial leaf blight, a detrimental crop disease affecting smallholder farmers in East Africa. The varieties were created using marker-assisted backcross breeding and are expected to protect local rice harvests against aggressive strains.