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https://www.readbyqxmd.com/read/29301954/deubiquitinase-otu5-affects-root-responses-to-phosphate-starvation
#1
Ivan Kulich, Zdeňka Vojtíková, Peter Sabol, Jitka Ortmannová, Vilém Neděla, Eva Tihlaříková, Viktor Žárský
Biogenesis of the plant secondary cell wall involves many important aspects, such as phenolic compound deposition and often silica incrustation. Previously, we demonstrated the importance of the exocyst subunit EXO70H4 for biogenesis of the trichome secondary cell wall, namely for deposition of the autofluorescent and callose-rich cell wall layer. Here, we reveal that EXO70H4-driven cell wall biogenesis is constitutively active in the mature trichome, but can also be activated elsewhere upon pathogen attack, giving this study a broader significance with an overlap into phytopathology...
January 4, 2018: Plant Physiology
https://www.readbyqxmd.com/read/29299291/regional-patterns-of-increasing-swiss-needle-cast-impacts-on-douglas-fir-growth-with-warming-temperatures
#2
E Henry Lee, Peter A Beedlow, Ronald S Waschmann, David T Tingey, Steven Cline, Michael Bollman, Charlotte Wickham, Cailie Carlile
The fungal pathogen, Phaeocryptopus gaeumannii, causing Swiss needle cast (SNC) occurs wherever Douglas-fir is found but disease damage is believed to be limited in the U.S. Pacific Northwest (PNW) to the Coast Range of Oregon and Washington (Hansen et al., Plant Disease, 2000, 84, 773; Rosso & Hansen, Phytopathology, 2003, 93, 790; Shaw, et al., Journal of Forestry, 2011, 109, 109). However, knowledge remains limited on the history and spatial distribution of SNC impacts in the PNW. We reconstructed the history of SNC impacts on mature Douglas-fir trees based on tree-ring width chronologies from western Oregon...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29297963/matrix-approach-to-the-simultaneous-detection-of-multiple-potato-pathogens-by-real-time-pcr
#3
M M Nikitin, N V Statsyuk, P A Frantsuzov, V G Dzhavakhiya, A G Golikov
AIM: Create a method for highly sensitive, selective, rapid, and easy-to-use detection and identification of economically significant potato pathogens, including viruses, bacteria and oomycetes, be it single pathogen, or a range of various pathogens occurring simultaneously. METHODS AND RESULTS: Test-systems for real-time PCR, operating in the unified amplification regime, have been developed for Phytophthora infestans, Pectobacterium atrosepticum, Dickeya dianthicola, Dickeya solani, Ralstonia solanacearum, Pectobacterium carotovorum, Clavibacter michiganensis subsp...
January 3, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29275504/aedes-albopictus-skuse-1895-diptera-culicidae-in-greece-13%C3%A2-years-of-living-with-the-asian-tiger-mosquito
#4
Ε Badieritakis, D Papachristos, D Latinopoulos, Α Stefopoulou, Α Kolimenakis, K Bithas, Ε Patsoula, S Beleri, D Maselou, G Balatsos, Α Michaelakis
Aedes (Stegomyia) albopictus (Skuse, 1895) (Diptera: Culicidae), commonly known as the Asian tiger mosquito, is an invasive mosquito species of public health significance, well established in many countries worldwide. In Greece, it was first recorded in Corfu and Thesprotia between 2003 and 2004. In the following years, further distribution and establishment of Ae. albopictus in Greece have been confirmed in many Regional Units of the country. In the current study, we report the invasion history of Ae. albopictus in Greece, until 2016...
December 23, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29234337/community-profiling-of-fusarium-in-combination-with-other-plant-associated-fungi-in-different-crop-species-using-smrt-sequencing
#5
Florian Walder, Klaus Schlaeppi, Raphaël Wittwer, Alain Y Held, Susanne Vogelgsang, Marcel G A van der Heijden
Fusarium head blight, caused by fungi from the genus Fusarium, is one of the most harmful cereal diseases, resulting not only in severe yield losses but also in mycotoxin contaminated and health-threatening grains. Fusarium head blight is caused by a diverse set of species that have different host ranges, mycotoxin profiles and responses to agricultural practices. Thus, understanding the composition of Fusarium communities in the field is crucial for estimating their impact and also for the development of effective control measures...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29227906/to-disinfect-or-not-to-disinfect-in-postharvest-research-on-the-fungal-decay-of-apple
#6
Matthias Naets, Mattias van Dael, Els Vanstreels, Dirk Daelemans, Pieter Verboven, Bart Nicolaï, Wannes Keulemans, Annemie Geeraerd
Postharvest losses of fruit and vegetables can reach up to 30%, the main cause being microbial decay. For apple fruit, mostly fungal pathogens, such as Penicillium expansum, Colletotrichum spp., Neofabraea spp. and Botrytis cinerea, are important. As such losses are unsustainable in many ways, it is necessary that research is conducted to prevent them. Generally, for plants and fruit grown under non-sterile field conditions, disinfection is carried out prior to the start of a phytopathological experiment. The motivation for this practice is the removal of background contamination so that it will not affect the experimental outcome and its interpretation...
December 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29205105/epidemiology-past-present-and-future-impacts-on-understanding-disease-dynamics-and-improving-plant-disease-management-a-summary-of-focus-issue-articles
#7
P S Ojiambo, J Yuen, F van den Bosch, L V Madden
Epidemiology has made significant contributions to plant pathology by elucidating the general principles underlying the development of disease epidemics. This has resulted in a greatly improved theoretical and empirical understanding of the dynamics of disease epidemics in time and space, predictions of disease outbreaks or the need for disease control in real-time basis, and tactical and strategic solutions to disease problems. Availability of high-resolution experimental data at multiple temporal and spatial scales has now provided a platform to test and validate theories on the spread of diseases at a wide range of spatial scales ranging from the local to the landscape level...
October 2017: Phytopathology
https://www.readbyqxmd.com/read/28795660/systems-and-synthetic-biology-perspective-of-the-versatile-plant-pathogenic-and-polysaccharide-producing-bacterium-xanthomonas-campestris
#8
Sarah Schatschneider, Jessica Schneider, Jochen Blom, Fabien Létisse, Karsten Niehaus, Alexander Goesmann, Frank-Jörg Vorhölter
Bacteria of the genus Xanthomonas are a major group of plant pathogens. They are hazardous to important crops and closely related to human pathogens. Being collectively a major focus of molecular phytopathology, an increasing number of diverse and intricate mechanisms are emerging by which they communicate, interfere with host signalling and keep competition at bay. Interestingly, they are also biotechnologically relevant polysaccharide producers. Systems biotechnology techniques have revealed their central metabolism and a growing number of remarkable features...
August 10, 2017: Microbiology
https://www.readbyqxmd.com/read/28755212/in-vitro-cryopreservation-of-date-palm-caulogenic-meristems
#9
Lotfi Fki, Olfa Chkir, Walid Kriaa, Ameni Nasri, Emna Baklouti, Raja B Masmoudi, Alain Rival, Noureddine Drira, Bart Panis
Cryopreservation is the technology of choice not only for plant genetic resource preservation but also for virus eradication and for the efficient management of large-scale micropropagation. In this chapter, we describe three cryopreservation protocols (standard vitrification, droplet vitrification, and encapsulation vitrification) for date palm highly proliferating meristems that are initiated from vitro-cultures using plant growth regulator-free MS medium. The positive impact of sucrose preculture and cold hardening treatments on survival rates is significant...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28645233/adaptation-to-the-host-environment-by-plant-pathogenic-fungi
#10
REVIEW
H Charlotte van der Does, Martijn Rep
Many fungi can live both saprophytically and as endophyte or pathogen inside a living plant. In both environments, complex organic polymers are used as sources of nutrients. Propagation inside a living host also requires the ability to respond to immune responses of the host. We review current knowledge of how plant-pathogenic fungi do this. First, we look at how fungi change their global gene expression upon recognition of the host environment, leading to secretion of effectors, enzymes, and secondary metabolites; changes in metabolism; and defense against toxic compounds...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28645232/interplay-between-innate-immunity-and-the-plant-microbiota
#11
Stéphane Hacquard, Stijn Spaepen, Ruben Garrido-Oter, Paul Schulze-Lefert
The innate immune system of plants recognizes microbial pathogens and terminates their growth. However, recent findings suggest that at least one layer of this system is also engaged in cooperative plant-microbe interactions and influences host colonization by beneficial microbial communities. This immune layer involves sensing of microbe-associated molecular patterns (MAMPs) by pattern recognition receptors (PRRs) that initiate quantitative immune responses to control host-microbial load, whereas diversification of MAMPs and PRRs emerges as a mechanism that locally sculpts microbial assemblages in plant populations...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28645231/evolution-of-hormone-signaling-networks-in-plant-defense
#12
Matthias L Berens, Hannah M Berry, Akira Mine, Cristiana T Argueso, Kenichi Tsuda
Studies with model plants such as Arabidopsis thaliana have revealed that phytohormones are central regulators of plant defense. The intricate network of phytohormone signaling pathways enables plants to activate appropriate and effective defense responses against pathogens as well as to balance defense and growth. The timing of the evolution of most phytohormone signaling pathways seems to coincide with the colonization of land, a likely requirement for plant adaptations to the more variable terrestrial environments, which included the presence of pathogens...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28637398/what-do-we-know-about-nod-like-receptors-in-plant-immunity
#13
Xiaoxiao Zhang, Peter N Dodds, Maud Bernoux
The first plant disease resistance (R) genes were identified and cloned more than two decades ago. Since then, many more R genes have been identified and characterized in numerous plant pathosystems. Most of these encode members of the large family of intracellular NLRs (NOD-like receptors), which also includes animal immune receptors. New discoveries in this expanding field of research provide new elements for our understanding of plant NLR function. But what do we know about plant NLR function today? Genetic, structural, and functional analyses have uncovered a number of commonalities and differences in pathogen recognition strategies as well as how NLRs are regulated and activate defense signaling, but many unknowns remain...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28637378/surveillance-to-inform-control-of-emerging-plant-diseases-an-epidemiological-perspective
#14
Stephen Parnell, Frank van den Bosch, Tim Gottwald, Christopher A Gilligan
The rise in emerging pathogens and strains has led to increased calls for more effective surveillance in plant health. We show how epidemiological insights about the dynamics of disease spread can improve the targeting of when and where to sample. We outline some relatively simple but powerful statistical approaches to inform surveillance and describe how they can be adapted to include epidemiological information. This enables us to address questions such as: Following the first report of an invading pathogen, what is the likely incidence of disease? If no cases of disease have been found, how certain can we be that the disease was not simply missed by chance? We illustrate the use of spatially explicit stochastic models to optimize targeting of surveillance and control resources...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28637377/the-candidatus-liberibacter-host-interface-insights-into-pathogenesis-mechanisms-and-disease-control
#15
Nian Wang, Elizabeth A Pierson, João Carlos Setubal, Jin Xu, Julien G Levy, Yunzeng Zhang, Jinyun Li, Luiz Thiberio Rangel, Joaquim Martins
"Candidatus Liberibacter" species are associated with economically devastating diseases of citrus, potato, and many other crops. The importance of these diseases as well as the proliferation of new diseases on a wider host range is likely to increase as the insects vectoring the "Ca. Liberibacter" species expand their territories worldwide. Here, we review the progress on understanding pathogenesis mechanisms of "Ca. Liberibacter" species and the control approaches for diseases they cause. We discuss the Liberibacter virulence traits, including secretion systems, putative effectors, and lipopolysaccharides (LPSs), as well as other important traits likely to contribute to disease development, e...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28617655/adapted-biotroph-manipulation-of-plant-cell-ploidy
#16
Mary C Wildermuth, Michael A Steinwand, Amanda G McRae, Johan Jaenisch, Divya Chandran
Diverse plant biotrophs that establish a sustained site of nutrient acquisition induce localized host endoreduplication. Endoreduplication is a process by which cells successively replicate their genomes without mitosis, resulting in an increase in nuclear DNA ploidy. Elevated ploidy is associated with enhanced cell size, metabolic capacity, and the capacity to differentiate. Localized host endoreduplication induced by adapted plant biotrophs promotes biotroph colonization, development, and/or proliferation...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28617654/function-discovery-and-exploitation-of-plant-pattern-recognition-receptors-for-broad-spectrum-disease-resistance
#17
Freddy Boutrot, Cyril Zipfel
Plants are constantly exposed to would-be pathogens and pests, and thus have a sophisticated immune system to ward off these threats, which otherwise can have devastating ecological and economic consequences on ecosystems and agriculture. Plants employ receptor kinases (RKs) and receptor-like proteins (RLPs) as pattern recognition receptors (PRRs) to monitor their apoplastic environment and detect non-self and damaged-self patterns as signs of potential danger. Plant PRRs contribute to both basal and non-host resistances, and treatment with pathogen-/microbe-associated molecular patterns (PAMPs/MAMPs) or damage-associated molecular patterns (DAMPs) recognized by plant PRRs induces both local and systemic immunity...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28613977/the-scientific-economic-and-social-impacts-of-the-new-zealand-outbreak-of-bacterial-canker-of-kiwifruit-pseudomonas-syringae-pv-actinidiae
#18
REVIEW
Joel L Vanneste
The introduction of Pseudomonas syringae pv. actinidiae (Psa) severely damaged the New Zealand kiwifruit industry, which in 2010 was based on only two cultivars. Despite an extraordinarily quick and strong response by industry, government, and scientists to minimize the economic and social impacts, the economic consequences of this outbreak were severe. Although our understanding of Psa epidemiology and control methods increased substantively over the past six years, the kiwifruit industry largely recovered because of the introduction of a less-susceptible yellow-fleshed cultivar...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28598721/iron-and-immunity
#19
Eline H Verbon, Pauline L Trapet, Ioannis A Stringlis, Sophie Kruijs, Peter A H M Bakker, Corné M J Pieterse
Iron is an essential nutrient for most life on Earth because it functions as a crucial redox catalyst in many cellular processes. However, when present in excess iron can lead to the formation of harmful hydroxyl radicals. Hence, the cellular iron balance must be tightly controlled. Perturbation of iron homeostasis is a major strategy in host-pathogen interactions. Plants use iron-withholding strategies to reduce pathogen virulence or to locally increase iron levels to activate a toxic oxidative burst. Some plant pathogens counteract such defenses by secreting iron-scavenging siderophores that promote iron uptake and alleviate iron-regulated host immune responses...
August 4, 2017: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/28590879/tritrophic-interactions-microbe-mediated-plant-effects-on-insect-herbivores
#20
Ikkei Shikano, Cristina Rosa, Ching-Wen Tan, Gary W Felton
It is becoming abundantly clear that the microbes associated with plants and insects can profoundly influence plant-insect interactions. Here, we focus on recent findings and propose directions for future research that involve microbe-induced changes to plant defenses and nutritive quality as well as the consequences of these changes for the behavior and fitness of insect herbivores. Insect (herbivore and parasitoid)-associated microbes can favor or improve insect fitness by suppressing plant defenses and detoxifying defensive phytochemicals...
August 4, 2017: Annual Review of Phytopathology
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