Articles tagged with Plant Pathogens
Researchers have deciphered how the beneficial fungus Serendipita indica successfully colonizes plant roots of Arabidopsis thaliana. The fungus secretes enzymes that produce a molecule called deoxyadenosine (dAdo), which activates cell death in plants, enabling colonization without causing significant harm.
Two strains of pathogenic fungi cooperate to share insect victims, dividing territories and utilizing unique specialties. This peaceful coexistence allows them to partition limited resources and adapt to their environment.
A new study finds that pathogens like Listeria and E. coli can survive on microplastics in wastewater treatment plants. These biofilms, called plastispheres, protect the pathogens from treatment processes, highlighting a challenge for safely reusing treated water.
Researchers found that the presence of a fungus increases the pH of the soil, promoting growth of beneficial bacteria. This interaction could lead to sustainable agricultural practices by harnessing microbial interactions to combat plant diseases.
Researchers discovered that disrupting plant microbiomes can compromise a plant's immune system, leading to autoimmunity. Prebiotics could potentially support or reset the microbiome to maintain balance, reducing losses in food crops.
A recent study has discovered a sophisticated mechanism by which pathogens like Phytophthora infestans compromise plant immunity by targeting the chloroplast protein StFC-II. This manipulation disrupts the plant's ability to generate reactive oxygen species, making it more susceptible to infection.
The impacts of natural disasters on plant health can be devastating, with the potential for direct effects from disasters like pathogen or vector dispersal. Human-driven disasters also create conditions favorable to the spread of plant pathogens, leading to crop loss and disease spread.
Researchers analyzed historic potato leaves to understand the evolution of the potato-pathogen 'arms race' that led to the Irish potato famine. The study found that the pathogen has remained relatively stable over time, with some genes remaining unchanged despite human intervention.
Researchers have used CRISPR/Cas9 gene editing to improve groundcherry's growth habit and fruit characteristics. This breakthrough could lead to increased crop yields and reduce the need for pesticides. The study also highlights the potential of groundcherry as a model species for studying plant biology.
Research reveals native plants and non-native crops attract pests that spread diseases, causing harm to both plant populations. The studies also found viruses transmitted from crops to wild plants, which can have devastating effects on native ecosystems.
The Xanthomonas cucurbitae pathogen that causes bacterial spot has remained genetically uniform across the Midwest, with most isolates sharing over 99% identical DNA sequences. This lack of diversification may hinder the pathogen's ability to evolve and could be leveraged for developing disease-resistant crops.
Researchers discovered that treating common vetch with specific bacteria and fungi can increase plant defense enzymes and recruit healthy bacteria to combat Colletotrichum spinaciae. This approach may be an effective way for future plant disease management.
Non-flowering bryophytes, including mosses, have sophisticated immune receptor repertoires that can be transferred between flowering and non-flowering plants. This discovery offers a new source of resistance genes against pathogens for major crops facing climate change threats.
A new study reconstructs the global migration history of Phytophthora infestans, challenging the common theory of its Mexican origin. The research found that P. infestans likely originated in the South American Andes and then spread globally.
Researchers have identified four novel core effectors from the pear anthracnose pathogen Colletotrichum fructicola that trigger significant immune responses in nonhost plant Nicotiana benthamiana. This discovery could transform approaches to plant disease management and bolster crops against devastating fungal infections.
Researchers have discovered a new source of resistance to the devastating wheat blast disease, leveraging a gene that also protects against powdery mildew. The Pm4 gene, found in European wheat varieties, confers dual protection against the pathogen and its effector molecule AVR-Rmg8.
Researchers at Osaka Metropolitan University discovered that mycoviral infections can increase the sensitivity of oomycete plant pathogens to specific fungicides. This finding could lead to innovative approaches for controlling plant diseases and reducing chemical treatments.
Researchers discovered that T-cell aging is not limited by organismal age, and healthy T cells can proliferate indefinitely. The epigenetic clock of T cells shows that death is not the end, and these cells do not plateau with age, defying traditional notions of cellular aging.
Researchers have identified 31 effector genes from the fungus Ceratocystis fimbriata, which causes devastating black rot in sweetpotatoes. This breakthrough provides a new approach to developing disease-resistant crops using effector-assisted breeding.
Researchers discovered that azole fungicides kill fungal pathogens by initiating self-destruction through two pathways: apoptosis and macroautophagy. This mechanism explains why azoles are losing effectiveness against resistant fungal strains.
Researchers tested seven antibiotics in combination with various natural compounds, finding synergistic effects against multidrug-resistant bacteria. The study suggests combining antibiotics with plant extracts or phytochemicals could be a promising strategy to combat antimicrobial resistance.
Researchers found that the loss of large herbivores like tapirs and deer reduces leaf damage caused by pathogens, leading to increased plant species richness. In contrast, insect damage remains unaffected, suggesting a more complex relationship between plants and their natural enemies.
The Phytopathology Research Forum successfully concluded its spring edition, showcasing cutting-edge developments in plant disease research and molecular breeding technology. Experts discussed the importance of adopting provenance security measures to ensure agricultural product integrity.
SMART researchers develop a nanosensor that selectively detects salicylic acid in live plants, vital for stress response. The sensor combines sensors for H₂O₂ and salicylic acid, enabling simultaneous monitoring of plant hormones and aiding in early diagnoses to improve crop resilience.
The study charts the family history of Arabica through Earth's heating and cooling periods over the last millennia. The research found that Arabica developed over 600,000 years ago in Ethiopia via natural mating between two other coffee species.
A recent study published in Phytobiomes Journal found that non-native crop viruses are infecting and harming wild desert plants. Infection rates with the virus CABYV reached as high as 88% in some populations, causing visible impacts on plant growth and root health.
Scientists at UC Davis discovered specific strains of soil bacteria that induce resistance to witchweed, a parasitic plant that affects 20% of Africa's sorghum crop. The bacteria alter root anatomy and degrade chemical cues, making it harder for witchweed to latch on, and have great promise as soil additives to improve yields.
Researchers used MRI to investigate the effects of Phytophthora cactorum on strawberry plants, discovering elevated relaxation times and visible pathogen presence. The study suggests MRI can monitor plant health, investigate disease progression, and inform strategies for preventing plant diseases.
A study using forest inventory data from over 25,000 plots found that biodiversity strongly suppresses pathogens and pests in many plant and animal systems. The 'dilution effect' of biodiversity on forest pests is jointly controlled by diversity and phylogenetic composition.
A study using historic and modern writing reveals more information about the effects and spread of Phytophthora infestans, a plant pathogen that caused the 1840s Irish potato famine. Researchers tracked the disease's spread across the US and Canada, finding it affected multiple states and provinces between 1843-45.
Researchers at the University of Illinois have identified genomic regions associated with resistance to four diseases in corn: Goss's wilt, gray leaf spot, northern corn leaf blight, and southern corn leaf blight. The study found that multiple genes working together can provide durable resistance against different pathogens.
Researchers at Cornell University analyzed plant spore dispersion using high-speed cameras and predicted the trajectory of spores carried by swirling motion created by vibrating leaves. The study aims to design a strategy to reduce pathogens from spreading from leaves.
Researchers at Penn State have identified six new species of Pectobacterium and one strain of Dickeya bacteria that can cause diseases such as blackleg and soft rot in Pennsylvania potatoes. These pathogens can lead to significant yield losses, particularly in the northeastern US.
Researchers at Boyce Thompson Institute discover helper NLRs Nrc2 and Nrc3 play a vital role in triggering the plant's immune response, activating MAPK signaling to induce immunity in tomatoes. The study highlights the importance of these proteins in ensuring crop resilience against pathogens.
Plant scientists have discovered a sophisticated RNA defense system that plants use to attack gray mold cells, sending mRNA molecules that disrupt fungal cellular processes. This innovative approach could lead to the development of eco-friendly fungicides with minimal environmental impact and no harm to humans or animals.
Researchers found that mycorrhizal fungi can significantly improve crop yields by up to 40% in fields with high levels of fungal pathogens. The inoculation was most effective when the soil had already been contaminated with pathogens, serving as a protective shield against further damage.
A team of MSU scientists has identified a key protein in transporting antimicrobial proteins out of plant cells, which could lead to breakthroughs in crop productivity and yield. By understanding how plants defend themselves against pathogens, researchers can develop new strategies to improve crop resilience.
A team of scientists led by the University of Arkansas System Division of Agriculture has been awarded a $3.57 million grant to develop spinach cultivars resistant to fungal pathogens. The project aims to expedite breeding for disease resistance, reducing fungicide use and supporting sustainable spinach production.
A recent study in Nature Communications has identified a gene cluster in wheat that produces triticein, an isoflavone compound with potential health benefits. This discovery offers opportunities for metabolic engineering efforts to improve wheat's nutritional quality and resistance to disease.
A recent study has provided significant genomic insight into tar spot of corn, a destructive disease causing $1.2 billion in yield loss. The researchers identified over 100 novel effectors that play a crucial role during infection, warranting further investigation.
Researchers found blue light kills both dried cells and biofilms of Listeria monocytogenes, a frequent contaminant of food processing facilities. The pathogen's demise occurred quickest on polystyrene surfaces.
The American Phytopathological Society has created a new series of distinguished reviews in honor of Harold H. Flor, who developed the gene-for-gene concept in plant pathology. The series presents authoritative reviews on molecular plant-microbe interactions, providing a historical perspective and future directions for research.
Scientists have identified a bacterial strain that can break down the toxic tomatine in tomato roots, providing new understanding of how soil microbes interact with plants. This discovery could lead to the development of new bioactive compounds for human applications.
A recent study reveals that emerging infectious diseases are accumulating rapidly globally, particularly in Holarctic trees. The 'big data' approach used in the study characterizes the growing threat posed by emergent infectious diseases, with some tree species, such as pines and oaks, showing high new disease accumulation.
Researchers at Tokyo University of Science have uncovered a novel mechanism for sorting endocytic cargo, revealing a specific compartment within the trans-Golgi network that determines the fate of cargo. This discovery has implications for understanding basic life processes and diseases caused by disruptions in endocytosis.
A new molecular mechanism has been identified that helps plants adjust protein levels to fight infection. By unzipping specific RNA structures, plant cells can produce defense proteins. This discovery also has implications for human cells, suggesting a similar mechanism may control protein production in response to pathogens.
Researchers found that AvrE/DspE family proteins, used by plant pathogens to cause disease, fold into a straw-like structure with a water channel. This discovery could lead to the development of new methods to disarm these proteins and prevent crop damage.
Biologists at Nicolaus Copernicus University in Torun synthesized silver nanoparticles using fungi, showing potential for medical applications. The method also improves crop protection by detecting plant pathogens and delivering nutrients to plants with minimal waste.
A team of researchers at the University of Johannesburg has made a groundbreaking discovery about how tomato plants defend themselves against the devastating ToCSV virus. By studying the molecular genetics of infected tomato varieties, they found that viral DNA methylation plays a crucial role in resistance to ToCSV.
Researchers have identified an essential stage in the takeover of rice cells by a fungus, which could accelerate treatment or prevention of rice blast disease. The discovery involves a modification in tRNA molecules that aid in protein construction, and its absence leads to reduced virulence.
Researchers have discovered a gene, B5, in Egyptian cotton that confers powerful resistance to bacterial blight. The gene enables strong resistance to the disease under Oklahoma field conditions and accumulates high amounts of defense chemicals.
Gray mold is a fungus that causes billions of dollars in crop losses each year, but researchers have discovered a way to control it without using toxic chemicals. The discovery reveals that gray mold uses lipid 'bubbles' to deliver RNA molecules that silence plant immune systems.
Researchers developed a smart agrochemical delivery platform using biomimetic mineralization, which improves crop yield and fruit zinc content. The platform, named MiZIFs, uses zeolitic imidazolate frameworks to encapsulate a synthetic growth regulator, promoting plant growth and stress tolerance.
The American Phytopathological Society has published a focus issue on critical biosecurity gaps in US plant disease diagnostics, highlighting the need for harmonized diagnostics within the agricultural biosecurity system. The focus issue addresses assay validation methods, including high-throughput screening and PCR/RPA techniques.
The new sensor chip detects multiple disease pathogens with high sensitivity and eliminates chemical dye reagents. Results are available in about 30 minutes, showing promise for rapid point-of-care diagnostic capabilities.
Researchers have identified a novel gene WTS that confers broad-spectrum resistance to clubroot disease in Brassica crops. The WTS protein complex functions as an endoplasmic reticulum-localized calcium release channel, increasing cytosolic calcium ions and activating plant defenses.
The American Phytopathological Society published a special issue on key discoveries in plant pathology, highlighting groundbreaking findings over the past 50 years. These discoveries have significantly impacted plant health, food security, and food safety worldwide.
The Sooty Bark Disease, caused by Cryptostroma corticale, is a growing threat to European maples and human health. Researchers have developed a DNA-based diagnostic method to detect the pathogen in air samples using volumetric air samplers.
Unseasonably warm and cold days prolong moth and butterfly activity by nearly a month, according to the study. Insect lifespans may also be affected, potentially leading to increased pathogen transmission.
A new identification tool called IDphy has been developed to accurately identify Phytophthora species, which cause significant economic and environmental losses. The tool uses data from ex-type cultures and includes features such as an interactive key, factsheets, and a mobile app.