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Late blight

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https://www.readbyqxmd.com/read/29775494/osa-mir164a-targets-osnac60-and-negatively-regulates-rice-immunity-against-the-blast-fungus-magnaporthe-oryzae
#1
Zhaoyun Wang, Yeqiang Xia, Siyuan Lin, Yanru Wang, Baohuan Guo, Xiaoning Song, Shaochen Ding, Liyu Zheng, Ruiying Feng, Shulin Chen, Yalin Bao, Cong Sheng, Xin Zhang, Jianguo Wu, Dongdong Niu, Hailing Jin, Hongwei Zhao
Exploring the regulatory mechanism played by endogenous rice miRNAs in defense responses against the blast disease is of great significance in both resistant variety breeding and disease control management. We identified rice defense-related miRNAs by comparing rice miRNA expression patterns before and after Magnaporthe oryzae strain Guy11 infection. We discovered that osa-miR164a expression reduced upon Guy11 infection at both early and late stages, which was perfectly associated with the induced expression of its target gene, OsNAC60...
May 18, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29772116/bioassay-guided-isolation-of-antifungal-compounds-from-disporopsis-aspera-engl-against-pseudoperonospora-cubensis-and-phytophthora-infestans
#2
Feng Zhu, Chengshan Yuan, Fangli Gang, Chaofu Yang, Wenjun Wu, Jiwen Zhang
Oomycetes are one type of the most highly destructive of the diseases that cause damage to some important crop plants, such as potato late blight, cucumber downy mildew and grape downy mildew. As main approach of the ongoing search for new botanical fungicide from plant, the secondary metabolites of D. aspera were investigated. Through efficient bioassay-guided isolation, two new (1, 2), twelve known compounds (3-14) were isolated, and their structures were determined via extensive NMR, HR-ESI-MS, IR. They were isolated from this genus for the first time except for compounds 11, 12...
May 17, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29694416/the-chloroplast-genome-sequence-of-bittersweet-solanum-dulcamara-plastid-genome-structure-evolution-in-solanaceae
#3
Ali Amiryousefi, Jaakko Hyvönen, Péter Poczai
Bittersweet (Solanum dulcamara) is a native Old World member of the nightshade family. This European diploid species can be found from marshlands to high mountainous regions and it is a common weed that serves as an alternative host and source of resistance genes against plant pathogens such as late blight (Phytophthora infestans). We sequenced the complete chloroplast genome of bittersweet, which is 155,580 bp in length and it is characterized by a typical quadripartite structure composed of a large (85,901 bp) and small (18,449 bp) single-copy region interspersed by two identical inverted repeats (25,615 bp)...
2018: PloS One
https://www.readbyqxmd.com/read/29588335/the-potato-map3k-stvik-is-required-for-the-phytophthora-infestans-rxlr-effector-pi17316-to-promote-disease
#4
Fraser Murphy, Qin He, Miles Armstrong, Licida M Giuliani, Petra C Boevink, Wei Zhang, Zhendong Tian, Paul R J Birch, Eleanor M Gilroy
Plant pathogens deliver effectors to manipulate processes in their hosts, creating a suitable environment for invasion and proliferation. Yet, little is known about the host proteins that are targeted by effectors from filamentous pathogens. Here, we show that stable transgenic expression in potato ( Solanum tuberosum ) and transient expression in Nicotiana benthamiana of the arginine-any amino acid-leucine-arginine effector Pi17316 enhances leaf colonization by the late blight pathogen Phytophthora infestans Expression of Pi17316 also attenuates cell death triggered by the pathogen-associated molecular pattern Infestin1 (INF1), indicating that the effector suppresses pattern-triggered immunity...
May 2018: Plant Physiology
https://www.readbyqxmd.com/read/29576086/pamp-responsive-atl-gene-strfp1-and-its-orthologue-nbatl60-positively-regulate-phytophthora-infestans-resistance-in-potato-and-nicotiana-benthamiana
#5
Cheng Zhong, Yajuan Ren, Yetong Qi, Xiaoling Yu, Xintong Wu, Zhendong Tian
Ubiquitination is a post-translational modification that plays a crucial role during the regulation of plant immune signalling. The plant ATL family consists of a large number of putative RING type ubiquitin ligases. We show that potato ATL family gene StRFP1 and its orthologue NbATL60 from N. benthamiana both respond to Phytophthora infestans culture filtrate (CF) and flg22 induction. StRFP1 positively regulates immunity against P. infestans in potato. Ectopic transient expression of StRFP1 or expression of NbATL60 in N...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29560514/identification-and-rapid-mapping-of-a-gene-conferring-broad-spectrum-late-blight-resistance-in-the-diploid-potato-species-solanum-verrucosum-through-dna-capture-technologies
#6
Xinwei Chen, Dominika Lewandowska, Miles R Armstrong, Katie Baker, Tze-Yin Lim, Micha Bayer, Brian Harrower, Karen McLean, Florian Jupe, Kamil Witek, Alison K Lees, Jonathan D Jones, Glenn J Bryan, Ingo Hein
A broad-spectrum late blight disease-resistance gene from Solanum verrucosum has been mapped to potato chromosome 9. The gene is distinct from previously identified-resistance genes. We have identified and characterised a broad-spectrum resistance to Phytophthora infestans from the wild Mexican species Solanum verrucosum. Diagnostic resistance gene enrichment (dRenSeq) revealed that the resistance is not conferred by previously identified nucleotide-binding, leucine-rich repeat genes. Utilising the sequenced potato genome as a reference, two complementary enrichment strategies that target resistance genes (RenSeq) and single/low-copy number genes (Generic-mapping enrichment Sequencing; GenSeq), respectively, were deployed for the rapid, SNP-based mapping of the resistance through bulked-segregant analysis...
March 20, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29535313/large-sub-clonal-variation-in-phytophthora-infestans-from-recent-severe-late-blight-epidemics-in-india
#7
Tanmoy Dey, Amanda Saville, Kevin Myers, Susanta Tewari, David E L Cooke, Sucheta Tripathy, William E Fry, Jean B Ristaino, Sanjoy Guha Roy
The population structure of the Phytophthora infestans populations that caused the recent 2013-14 late blight epidemic in eastern India (EI) and northeastern India (NEI) was examined. The data provide new baseline information for populations of P. infestans in India. A migrant European 13_A2 genotype was responsible for the 2013-14 epidemic, replacing the existing populations. Mutations have generated substantial sub-clonal variation with 24 multi-locus genotypes (MLGs) found, of which 19 were unique variants not yet reported elsewhere globally...
March 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29530614/food-safety-evaluation-for-r-proteins-introduced-by-biotechnology-a-case-study-of-vnt1-in-late-blight-protected-potatoes
#8
REVIEW
Jeffrey W Habig, Aaron Rowland, Matthew G Pence, Cathy X Zhong
Resistance genes (R-genes) from wild potato species confer protection against disease and can be introduced into cultivated potato varieties using breeding or biotechnology. The R-gene, Rpi-vnt1, which encodes the VNT1 protein, protects against late blight, caused by Phytophthora infestans. Heterologous expression and purification of active VNT1 in quantities sufficient for regulatory biosafety studies was problematic, making it impractical to generate hazard characterization data. As a case study for R-proteins, a weight-of-evidence, tiered approach was used to evaluate the safety of VNT1...
June 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29487574/versatile-antagonistic-activities-of-soil-borne-bacillus-spp-and-pseudomonas-spp-against-phytophthora-infestans-and-other-potato-pathogens
#9
Simon Caulier, Annika Gillis, Gil Colau, Florent Licciardi, Maxime Liépin, Nicolas Desoignies, Pauline Modrie, Anne Legrève, Jacques Mahillon, Claude Bragard
The world potato is facing major economic losses due to disease pressure and environmental concerns regarding pesticides use. This work aims at addressing these two issues by isolating indigenous bacteria that can be integrated into pest management strategies. More than 2,800 strains of Bacillus -like and Pseudomonas -like were isolated from several soils and substrates associated with potato agro-systems in Belgium. Screenings for antagonistic activities against the potato pathogens Alternaria solani, Fusarium solani (BCCM-MUCL 5492), Pectobacterium carotovorum (ATCC 15713), Phytophthora infestans (CRA-W10022) and Rhizoctonia solani (BCCM-MUCL 51929) were performed, allowing the selection of 52 Bacillus spp...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29434226/detection-of-multi-tomato-leaf-diseases-late-blight-target-and-bacterial-spots-in-different-stages-by-using-a-spectral-based-sensor
#10
Jinzhu Lu, Reza Ehsani, Yeyin Shi, Ana Isabel de Castro, Shuang Wang
Several diseases have threatened tomato production in Florida, resulting in large losses, especially in fresh markets. In this study, a high-resolution portable spectral sensor was used to investigate the feasibility of detecting multi-diseased tomato leaves in different stages, including early or asymptomatic stages. One healthy leaf and three diseased tomato leaves (late blight, target and bacterial spots) were defined into four stages (healthy, asymptomatic, early stage and late stage) and collected from a field...
February 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29385612/potato-late-blight-field-resistance-from-qtl-dpi09c-is-conferred-by-the-nb-lrr-gene-r8
#11
Rui Jiang, Jingcai Li, Zhendong Tian, Juan Du, Miles Armstrong, Katie Baker, Joanne Tze-Yin Lim, Jack H Vossen, Huan He, Leticia Portal, Jun Zhou, Merideth Bonierbale, Ingo Hein, Hannele Lindqvist-Kreuze, Conghua Xie
Following the often short-lived protection that major nucleotide binding, leucine-rich-repeat (NB-LRR) resistance genes offer against the potato pathogen Phytophthora infestans, field resistance was thought to provide a more durable alternative to prevent late blight disease. We previously identified the QTL dPI09c on potato chromosome 9 as a more durable field resistance source against late blight. Here, the resistance QTL was fine-mapped to a 186 kb region. The interval corresponds to a larger, 389 kb, genomic region in the potato reference genome of Solanum tuberosum Group Phureja doubled monoploid clone DM1-3 (DM) and from which functional NB-LRRs R8, R9a, Rpi-moc1, and Rpi_vnt1 have arisen independently in wild species...
March 24, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29371580/botanicals-and-phosphonate-show-potential-to-replace-copper-for-control-of-potato-late-blight
#12
Hans-Rudolf Forrer, Susanne Vogelgsang, Tomke Musa
Potato late blight (PLB) caused by Phytophthora infestans (Pi) is the most harmful disease in potato production worldwide. In organic farming, copper is used despite its persistence in soil and toxicity to soil organisms. To replace copper, suspensions of powders from three promising botanicals, including bark of buckthorn ( Frangula alnus , FA), roots of medicinal rhubarb ( Rheum palmatum ) and galls of the nutgall tree ( Galla chinensis ), were tested in multi-year field experiments. The current study shows for the first time that botanicals could replace copper under field conditions and best PLB reduction on leaves was achieved with FA, reaching a level close to that of 2 to 3 kg copper per hectare and year...
November 24, 2017: Journal of Fungi (Basel, Switzerland)
https://www.readbyqxmd.com/read/29327646/late-blight-resistance-screening-of-major-wild-swedish-solanum-species-s-dulcamara-s-nigrum-and-s-physalifolium
#13
Kibrom Abreha, Åsa Lankinen, Laura Masini, Sofia Hydbom, Erik Andreasson
To understand the contribution of wild Solanum species to the epidemiology of potato late blight in Sweden, we characterized the resistance of the three putative alternative hosts; Solanum physalifolium, S. nigrum, and S. dulcamara to Phytophthora infestans, the causal agent of late blight. The pathogen sporulated in all ten investigated S. physalifolium genotypes, suggesting susceptibility (S phenotype). Field-grown S. physalifolium was naturally infected but could regrow, though highly infected genotypes were smaller at the end of the season...
January 12, 2018: Phytopathology
https://www.readbyqxmd.com/read/29284795/considerations-and-recommendations-for-selection-and-utilization-of-upper-extremity-clinical-outcome-assessments-in-human-spinal-cord-injury-trials
#14
REVIEW
Linda A T Jones, Anne Bryden, Tracey L Wheeler, Keith E Tansey, Kim D Anderson, Michael S Beattie, Andrew Blight, Armin Curt, Edelle Field-Fote, James D Guest, Jane Hseih, Lyn B Jakeman, Sukhvinder Kalsi-Ryan, Laura Krisa, Daniel P Lammertse, Benjamin Leiby, Ralph Marino, Jan M Schwab, Giorgio Scivoletto, David S Tulsky, Ed Wirth, José Zariffa, Naomi Kleitman, Mary Jane Mulcahey, John D Steeves
STUDY DESIGN: This is a focused review article. OBJECTIVES: This review presents important features of clinical outcomes assessments (COAs) in human spinal cord injury research. Considerations for COAs by trial phase and International Classification of Functioning, Disability and Health are presented as well as strengths and recommendations for upper extremity COAs for research. Clinical trial tools and designs to address recruitment challenges are identified. METHODS: The methods include a summary of topics discussed during a two-day workshop, conceptual discussion of upper extremity COAs and additional focused literature review...
December 28, 2017: Spinal Cord
https://www.readbyqxmd.com/read/29237394/prediction-of-mirna-and-identification-of-their-relationship-network-related-to-late-blight-disease-of-potato
#15
Animesh Kumar, Mohammad Samir Farooqi, D C Mishra, Sanjeev Kumar, Anil Rai, K K Chaturvedi, S B Lal, Anu Sharma
Late blight, is one of the most serious disease in potato caused by Phytophthora infestans. In spite of adopting so many agricultural practices this disease is still a threat for potato. Recent studies showed that microRNA (miRNA), an important gene expression regulator, plays a very important role in host-pathogen interaction by silencing genes either by destructing or blocking of translation of mRNA. To date only few miRNA have been discovered which are related to late blight disease of potato during host pathogen interaction...
December 13, 2017: MicroRNA
https://www.readbyqxmd.com/read/29209352/melatonin-attenuates-potato-late-blight-by-disrupting-cell-growth-stress-tolerance-fungicide-susceptibility-and-homeostasis-of-gene-expression-in-phytophthora-infestans
#16
Shumin Zhang, Xianzhe Zheng, Russel J Reiter, Shun Feng, Ying Wang, Sen Liu, Liang Jin, Zhengguo Li, Raju Datla, Maozhi Ren
Phytophthora infestans ( P. infestans ) is the causal agent of potato late blight, which caused the devastating Irish Potato Famine during 1845-1852. Until now, potato late blight is still the most serious threat to potato growth and has caused significant economic losses worldwide. Melatonin can induce plant innate immunity against pathogen infection, but the direct effects of melatonin on plant pathogens are poorly understood. In this study, we investigated the direct effects of melatonin on P. infestans ...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29204150/-rhizobium-impacts-on-seed-productivity-quality-and-protection-of-pisum-sativum-upon-disease-stress-caused-by-didymella-pinodes-phenotypic-proteomic-and-metabolomic-traits
#17
Nima Ranjbar Sistani, Hans-Peter Kaul, Getinet Desalegn, Stefanie Wienkoop
In field peas, ascochyta blight is one of the most common fungal diseases caused by Didymella pinodes. Despite the high diversity of pea cultivars, only little resistance has been developed until to date, still leading to significant losses in grain yield. Rhizobia as plant growth promoting endosymbionts are the main partners for establishment of symbiosis with pea plants. The key role of Rhizobium as an effective nitrogen source for legumes seed quality and quantity improvement is in line with sustainable agriculture and food security programs...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29189097/a-fungus-inducible-pepper-carboxylesterase-exhibits-antifungal-activity-by-decomposing-the-outer-layer-of-fungal-cell-walls
#18
Hyo-Hyoun Seo, Ae Ran Park, Hyun-Hwa Lee, Sangkyu Park, Yun-Jeong Han, Quyen T N Hoang, Gyung Ja Choi, Jin-Cheol Kim, Young Soon Kim, Jeong-Il Kim
Colletotrichum species are major fungal pathogens that cause devastating anthracnose diseases in many economically important crops. In this study, we observed the hydrolyzing activity of a fungus-inducible pepper carboxylesterase (PepEST) on cell walls of C. gloeosporioides, causing growth retardation of the fungus by blocking appressorium formation. To determine the cellular basis for the growth inhibition, we observed the localization of PepEST on the fungus and found the attachment of the protein on surfaces of conidia and germination tubes...
May 2018: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29173073/in-vivo-assessment-of-plant-extracts-for-control-of-plant-diseases-a-sesquiterpene-ketolactone-isolated-from-curcuma-zedoaria-suppresses-wheat-leaf-rust
#19
Jae Woo Han, Sang Hee Shim, Kyoung Soo Jang, Yong Ho Choi, Quang Le Dang, Hun Kim, Gyung Ja Choi
As an alternative to synthetic pesticides, natural materials such as plant extracts and microbes have been considered to control plant diseases. In this study, methanol extracts of 120 plants were explored for in vivo antifungal activity against Rhizoctonia solani, Botrytis cinerea, Phytophthora infestans, Puccinia triticina, and Blumeria graminis f. sp. hordei. Of the 120 plant extracts, eight plant extracts exhibited a disease control efficacy of more than 90% against at least one of five plant diseases. In particular, a methanol extract of Curcuma zedoaria rhizomes exhibited strong activity against wheat leaf rust caused by P...
February 1, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29090012/infection-of-a-tomato-cell-culture-by-phytophthora-infestans-a-versatile-tool-to-study-phytophthora-host-interactions
#20
Charikleia Schoina, Klaas Bouwmeester, Francine Govers
BACKGROUND: The oomycete Phytophthora infestans causes late blight on potato and tomato. Despite extensive research, the P.   infestans -host interaction is still poorly understood. To find new ways to further unravel this interaction we established a new infection system using MsK8 tomato cells. These cells grow in suspension and can be maintained as a stable cell line that is representative for tomato. RESULTS: MsK8 cells can host several Phytophthora species pathogenic on tomato...
2017: Plant Methods
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