Articles tagged with Plant Pathogens
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A study by North Carolina State University found that the Irish potato famine-causing pathogen Phytophthora infestans has evolved into a more virulent form, with modern strains containing genes not present in historical samples.
Researchers have identified a new gene in the jasmonate pathway that controls plant defenses without affecting growth. This finding could lead to improved crop resistance in agriculture by manipulating the jasmonate signaling pathway.
Researchers at USDA and University of California-Davis discovered distinctive amino acid profiles in oranges grown on HLB-positive or -negative trees. These profiles could serve as an early indicator of the pathogen's presence.
The new screening technique uncovers five novel immune-priming compounds in Arabidopsis plants that protect crops without impacting growth or yield. These compounds work by inhibiting enzymes that inactivate defense hormone salicylic acid, leading to enhanced disease resistance.
Researchers at the University of Delaware found that beneficial bacteria in soil can signal plants' stomata to close, preventing disease infection. This discovery highlights the potential for probiotics to bolster plant immunity naturally.
A new study reveals that the pattern of gene regulation in plant pathogens is shaped by their past environments, not just their genetic makeup. This finding has significant implications for disease control and may require a new approach to regulating microbial activity.
A comprehensive list of 235 planthoppers from Iran has been compiled, featuring new species names and taxonomic data. The study aims to improve pest control management and encourage further research on this important group of insects.
A new invention by Michigan State University professor Syed Hashsham enables the instant identification of plant diseases using a low-cost handheld device. This technology uses genetic analysis and can identify pathogens, their genotype, and amount in under 30 minutes, speeding up treatments and preventing pathogen spread.
Using autonomous unmanned aerial vehicles (UAVs), researchers are creating an early warning system for high-risk plant pathogens by predicting atmospheric transport barriers. This technique aims to improve crop security, disease spread, and climate change management.
A study published in Phytopathology identifies California as the source of the devastating tree-killing fungus Seiridium cardinale. The pathogen has infected and killed up to 95% of native trees worldwide, including junipers and cedars.
A study by Purdue University researchers found that E. coli and Salmonella can survive inside plant tissues, rendering exterior sanitization ineffective. The pathogens were detected in every major tissue of the plants, including those transporting nutrients. Cooking foods to known temperatures eliminates these bacteria from inner tissues.
A new study from the University of North Carolina at Chapel Hill reveals that plant pathogens employ a surprisingly limited number of cellular targets to infect plants. By mapping the interactome for Arabidopsis thaliana, researchers found that these targets are shared among multiple pathogens, suggesting a coordinated attack strategy.
A USDA-led consortium has sequenced the genome of Mycosphaerella graminicola, a pathogen causing significant yield losses in wheat crops. The sequencing effort may lead to new strategies to control this disease, which affects every wheat-growing area worldwide.
Researchers have discovered how plant pathogens attack soybeans by reducing isoflavone production. Plants respond with a surge in isoflavone production, sparking a counterattack from the pathogen. This complex interaction may hold key to developing effective disease treatments and preventing crop losses.
Researchers discovered that Arabidopsis plants boost their immune system in the morning to prepare for the greatest fungal spore release. The daily cycle of defense compounds is safer and more efficient than constant production, allowing plants to adapt to pathogens' schedules.
A recent study has shed light on the genetic code of a plant pathogen that causes downy mildew disease. The analysis revealed massive gene loss in the pathogen, which is essential for its stealthy lifestyle, and could lead to new ways to investigate how these pathogens wreak havoc and prevent billions of dollars of losses for farmers.
Researchers have sequenced the genome of a plant disease-causing organism, uncovering its stealthy tactics and providing insights into the plant immune system. This discovery enables new ways to prevent disease and has vast implications for understanding and combating many other challenging plant pathogens.
Researchers predict carbon dioxide levels will double by 2050, altering plant diseases and affecting crop yields. Elevated carbon dioxide and ozone can make plants more susceptible to some diseases, but less susceptible to others.
Researchers are developing methods to protect cacao crops from devastating plant pathogens, targeting two mechanisms critical for pathogen attack. The project aims to improve crop resilience and provide nutrition and income options for smallholder farmers in developing countries.
Ecological speciation is a main route for the emergence of new fungal diseases in plants, according to researchers. Fungi account for 30 percent of emerging infectious diseases in plants.
University of Missouri researchers have identified important genetic components that negatively regulate the plant's immune system, allowing for more durable safeguards against pathogens. This discovery could lead to the development of crops with improved resistance to diseases and increased seed production.
A universal language for describing genes involved in microbial-host interactions has been created, providing a shared vocabulary for researchers. The Gene Ontology resource will increase knowledge of molecular mechanisms underlying these interactions, ultimately leading to the design of novel disease-limiting strategies.
A new study found that a bacterial pathogen disables the tomato plant's intruder alarm system by deactivating cell surface receptors, allowing the bacteria to spread rapidly without resistance. Understanding this mechanism could lead to new ways of tackling plant diseases without pesticides.
A study by VBI Professor Brett Tyler and colleagues reveals that the Avr1b virulence protein in Phytophthora sojae suppresses programmed cell death in plants, disabling their immune systems. This finding has significant implications for understanding plant-pathogen interactions and developing effective disease management strategies.
A new study led by UC Berkeley researchers reconstructs the Sudden Oak Death epidemic in California, tracing the pathogen's spread from its introduction to its current evolution. The study finds that nurseries played a key role in spreading the disease and that climate and environmental conditions contribute to the pathogen's mortality.
A Virginia Tech researcher is investigating the evolution of bacterial speck disease in tomatoes, which may hold clues about how plant pathogens adapted to monoculture farming. The study aims to identify molecular mechanisms allowing pathogens to specialize to specific plant species and become more aggressive.
Researchers discovered a pathway plants use to defend against pathogens, involving a signaling cascade that triggers the production of anti-microbial compounds. This understanding could lead to improved crop disease resistance.
Brent Christner's team found biological particles in precipitation, which can catalyze freezing at warmer temperatures, affecting precipitation patterns. The discovery has implications for understanding agricultural pathogens and their role in the global warming process.
Researchers found that thale cress responds differently to various plant pests and microorganisms, with specific hormone compositions leading to unique gene expressions.
Researchers at North Carolina State University have found that Phytophthora infestans, the fungus-like pathogen responsible for the 1840s Irish potato famine, originated in the Andes region of South America. The study used gene genealogies to track the migration patterns of different strains of the pathogen, pointing to an Andean origin.
The genome sequences of Phytophthora ramorum and Phytophthora sojae reveal a recent expansion and diversification of deadly genes, suggesting a benign photosynthetic ancestor. The sequences also indicate a rapidly evolving secretome involved in plant infection mechanisms.
A team of researchers identified a unique genetic fingerprint in the pathogen responsible for potato blight, showing that genome plasticity plays a crucial role in its virulence. The study provides insight into how plant pathogens adapt to their environments by tailoring their genomes.
A Purdue University study identified a gene that helps plants recognize and defend against certain pathogens, but also allows other pathogens to invade. The gene, BIK1, produces a protein that regulates a plant defense hormone called salicylic acid.
Researchers found a double line of defence in plants, with PEN2 enzyme releasing fungicidal substances and another mechanism involving EDS1, PAD4 and SAG101 proteins. This multi-step defence system is crucial for plant durability against parasite attacks.
Virginia Bioinformatics Institute researcher receives USDA functional genomics grant to develop control of major soybean pathogen, with a focus on early stages of infection and whole genome approach. The project aims to understand the complex web of interactions between pathogens and plant genes.
Researchers at Ohio State University found that plants have a dual defense system against pathogens, using both PAMP and R-protein pathways. The study reveals that these pathways work together to provide stronger immune responses, allowing plants to resist infections more effectively.
Scientists at Ohio State University have discovered a gene called Avr3a that triggers the blight that destroyed Ireland's potato crops in the 19th century. The gene is found in the pathogen Phytophthora infestans, which causes massive agricultural damage worldwide.
Researchers at Purdue University discovered that a group of plants called metal hyperaccumulators can store high levels of metal in their tissues, making them resistant to pathogens. This trait allows these plants to thrive in soils naturally enriched in metals without succumbing to diseases like powdery mildew.
A recent study highlights the importance of implementing sanitary growing and harvesting conditions worldwide to reduce the risk of human disease outbreaks linked to fresh produce. Plant pathologists emphasize the need for good quality irrigation water and sanitary worker conditions, particularly as international imports increase.
Researchers found evidence of Heterobasidion annosum pathogen originating from eastern North America, likely hitching a ride in untreated lumber from infected trees. The pathogen has since established itself in the Presidential Estate of Castelporziano, killing large swaths of stone pine trees.
A study by Indiana University researchers suggests that European soil microbes help the invasive American black cherry tree grow, while inhibiting native species. The research found that in Dutch greenhouses, sterilized soil led to poor growth of native cherry trees, but non-sterilized soil allowed the invasive species to thrive.
Researchers at the University of Wisconsin-Madison have identified a gene that protects potatoes from late blight, a fungal pathogen responsible for the Irish potato famine. The discovery holds significant potential to save farmers hundreds of millions of dollars and benefit the environment by reducing toxic chemical applications.
UC researchers have confirmed that coast redwood and Douglas fir are susceptible to Phytophthora ramorum, the pathogen causing Sudden Oak Death. The disease has already killed tens of thousands of oaks and tanoaks along California's northern coast.
Researchers found that the Rpm1 resistance gene in Arabidopsis is approximately 9.8 million years old, with minimal changes over time, contradicting the 'arms race' theory. The study suggests an alternative 'trench warfare' model, where cycles of disease epidemics maintain stable forms of resistance and susceptibility genes.
Bioterrorism poses a significant threat to US agriculture, with pathogens like soybean rust capable of devastating yields and contaminating the food supply. Experts are working to identify the most-threatening pathogens and develop strategies for prevention and response.
Researchers at Johns Hopkins University are investigating the effectiveness of river-bank filtration in removing harmful viruses, protozoa, and bacteria from drinking water. The study aims to determine if this natural filter can produce cleaner drinking water while minimizing the creation of toxic by-products.
The Institute of Food Technologists' Annual Meeting will explore ways to detect, identify, prevent, and control viruses and parasites in food and water. The symposium will also discuss rising antimicrobial resistance in pathogens, acid-resistant pathogens, and strategies for enhancing the safety of fresh produce.