keyword
MENU ▼
Read by QxMD icon Read
search

phytophthora

keyword
https://www.readbyqxmd.com/read/29150804/using-citrus-aurantifolia-essential-oil-for-the-potential-biocontrol-of-colocasia-esculenta-taro-leaf-blight-caused-by-phytophthora-colocasiae
#1
Séverin Nguemezi Tchameni, Staelle Njamou Mbiakeu, Modeste Lambert Sameza, Pierre Michel Dongmo Jazet, François Tchoumbougnang
The aim of this work was to evaluate the antimicrobial activities of leaves and epicarp of Citrus aurantifolia essential oil against Phytophthora colocasiae, the causative agent of taro leaf blight. Oils were extracted by hydrodistillation, and their chemical composition was determined by gas chromatography and gas chromatography coupled with mass spectrometry. Antimicrobial activities of oils were tested in vitro against mycelium growth and sporangium production. In situ tests were done on healthy taro leaves, and the necrosis symptoms were evaluated...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29140163/hsp70s-enhance-a-phytophthora-infestans-effector-induced-cell-death-via-a-mapk-cascade-in-nicotiana-benthamiana
#2
Joohyun Lee, So Eui Lee, SooHyun Oh, Eunyoung Seo, Doil Choi
A destructive pathogen, Phytophthora infestans, secretes hundreds of effectors for successful survival in its host plants. The effectors modulate plant defense system at diverse cellular compartments to take an advantage of pathogen survivals. There were a few researches shown the mode-of-action of each effectors and their interacting proteins in plant cells. Here, we investigated the mode-of-action of a P. infestans effector, Pi23226, which induces cell death in Nicotiana benthamiana. To identify its host factors, we performed co-immunoprecipitation and liquid chromatography-mass spectrometry, and selected members of HSP70 as candidates...
November 15, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29138903/next-generation-sequencing-to-identify-candidate-genes-and-develop-diagnostic-markers-for-a-novel-phytophthora-resistance-gene-rpshc18-in-soybean
#3
Chao Zhong, Suli Sun, Yinping Li, Canxing Duan, Zhendong Zhu
A novel Phytophthora sojae resistance gene RpsHC18 was identified and finely mapped on soybean chromosome 3. Two NBS-LRR candidate genes were identified and two diagnostic markers of RpsHC18 were developed. Phytophthora root rot caused by Phytophthora sojae is a destructive disease of soybean. The most effective disease-control strategy is to deploy resistant cultivars carrying Phytophthora-resistant Rps genes. The soybean cultivar Huachun 18 has a broad and distinct resistance spectrum to 12 P. sojae isolates...
November 14, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29125028/molecular-basis-of-citrus-sunki-susceptibility-and-poncirus-trifoliata-resistance-upon-phytophthora-parasitica-attack
#4
Ronaldo J D Dalio, Heros José Máximo, Tiago Silva Oliveira, Thamara Azevedo, Henrique Leme Felizatti, Magnólia Araújo Campos, Marcos Antonio Antonio Machado
Coevolution has shaped the molecular basis of an extensive number of defense mechanisms in plant-pathogen interactions. Phytophthora parasitica, a hemibiothrophic oomycete pathogen and the causal agent of citrus root rot and gummosis, interacts differently with Citrus sunki and Poncirus trifoliata; two commonly favored citrus rootstocks that are recognized as susceptible and resistant, respectively, to P. parasitica. The molecular core of these interactions remains elusive. Here, we provide evidences on the defense strategies employed by both susceptible and resistant citrus rootstocks, in parallel with P...
November 10, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29124466/antifungal-activity-of-avocado-rhizobacteria-against-fusarium-euwallaceae-and-graphium-spp-associated-with-euwallacea-spp-nr-fornicatus-and-phytophthora-cinnamomi
#5
Edgar Guevara-Avendaño, Joseph D Carrillo, Cedric Ndinga-Muniania, Kevin Moreno, Alfonso Méndez-Bravo, José A Guerrero-Analco, Akif Eskalen, Frédérique Reverchon
Plant rhizobacteria have been successfully used as biocontrol agents against fungal phytopathogens. However, their potential to control two important avocado diseases, namely Fusarium dieback (FD) and Phytophthora root rot (PRR), has been poorly studied. FD is an emerging disease triggered by fungi associated with two ambrosia beetle species (Euwallacea fornicatus species complex), while PRR is caused by Phytophthora cinnamomi, a soil-borne oomycete. In the present work, the antifungal activity of bacteria isolated from avocado rhizosphere was tested in dual culture assays against Fusarium euwallaceae, Graphium euwallaceae and Graphium sp...
November 9, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29117917/antagonistic-endophytic-bacteria-associated-with-nodules-of-soybean-glycine-max-l-and-plant-growth-promoting-properties
#6
LongFei Zhao, YaJun Xu, XinHe Lai
A total of 276 endophytic bacteria were isolated from the root nodules of soybean (Glycine max L.) grown in 14 sites in Henan Province, China. The inhibitory activity of these bacteria against pathogenic fungus Phytophthora sojae 01 was screened in vitro. Six strains with more than 63% inhibitory activities were further characterized through optical epifluorescence microscopic observation, sequencing, and phylogenetic analysis of 16S rRNA gene, potential plant growth-promoting properties analysis, and plant inoculation assay...
October 13, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29107238/in-vitro-and-in-vivo-activities-of-eugenol-against-tobacco-black-shank-caused-by-phytophthora-nicotianae
#7
Changliang Jing, Jianyu Gou, Xiaobin Han, Qian Wu, Chengsheng Zhang
Phytophthora nicotianae causes serious black shank disease in tobacco. Syringa oblata essential oil and its main components were evaluated to develop an effective and environmentally friendly biocontrol agent. Eugenol, which exhibited the strongest activity, was intensively investigated in vitro and in vivo. The mycelial growth of P. nicotianae was inhibited by eugenol at a minimum inhibitory concentration of 200μgmL(-1), and inhibition occurred in a dose-dependent manner. Extracellular pH and extracellular conductivity results indicated that eugenol increased membrane permeability...
October 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29106332/conserved-rxlr-effectors-from-oomycetes-hyaloperonospora-arabidopsidis-and-phytophthora-sojae-suppress-pamp-and-effector-triggered-immunity-in-diverse-plants
#8
Devdutta Deb, Ryan Anderson, Theresa How Yew Kin, Brett M Tyler, John M McDowell
Effector proteins are exported to the interior of host cells by diverse plant pathogens. Many oomycete pathogens maintain large families of candidate effector genes, encoding proteins with a secretory leader followed by an RxLR motif. Although most of these genes are very divergent between oomycete species, several genes are conserved between Phytophthora species and Hyaloperonospora arabidopsidis (Hpa), suggesting that they play important roles in pathogenicity. We describe a pair of conserved effector candidates, HaRxL23 and PsAvh73, from Hpa and P...
November 6, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29101280/an-arabidopsis-glycine-rich-plasma-membrane-protein-enhances-disease-resistance-in-soybean
#9
Bing Wang, Rishi Sumit, Binod B Sahu, Micheline N Ngaki, Subodh K Srivastava, Yang Yang, Madan K Bhattacharyya
Nonhost resistance is defined as the immunity of a plant species to all nonadapted pathogen species. Arabidopsis ecotype Columbia-0 (Col-0) is nonhost to oomycete plant pathogen Phytophthora sojae and fungal plant pathogen Fusarium virguliforme that are pathogenic to soybean. Previously, we reported generating pss1 mutation in the pen1-1 genetic background, genetic mapping and characterization of the Arabidopsis nonhost resistance Phytophthora sojae susceptible gene locus, PSS1. In this study, we identified six candidate PSS1 genes by comparing single nucleotide polymorphisms (SNPs) of (i) the bulked DNA sample of seven F2:3 families homozygous for the pss1 allele and (ii) the pen1-1 mutant with Col-0...
November 3, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29090012/infection-of-a-tomato-cell-culture-by-phytophthora-infestans-a-versatile-tool-to-study-phytophthora-host-interactions
#10
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
https://www.readbyqxmd.com/read/29075284/corrigendum-identification-of-quercus-agrifolia-coast-live-oak-resistant-to-the-invasive-pathogen-phytophthora-ramorum-in-native-stands-using-fourier-transform-infrared-ft-ir-spectroscopy
#11
Anna O Conrad, Luis E Rodriguez-Saona, Brice A McPherson, David L Wood, Pierluigi Bonello
[This corrects the article on p. 521 in vol. 5, PMID: 25352852.].
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29075272/overexpression-of-ntwrky50-increases-resistance-to-ralstonia-solanacearum-and-alters-salicylic-acid-and-jasmonic-acid-production-in-tobacco
#12
Qiuping Liu, Ying Liu, Yuanman Tang, Juanni Chen, Wei Ding
WRKY transcription factors (TFs) modulate plant responses to biotic and abiotic stresses. Here, we characterized a WRKY IIc TF, NtWRKY50, isolated from tobacco (Nicotiana tabacum) plants. The results showed that NtWRKY50 is a nuclear-localized protein and that its gene transcript is induced in tobacco when inoculated with the pathogenic bacterium Ralstonia solanacearum. Overexpression of NtWRKY50 enhanced bacterial resistance, which correlated with enhanced SA and JA/ET signaling genes. However, silencing of the NtWRKY50 gene had no obvious effects on plant disease resistance, implying functional redundancy of NtWRKY50 with other TFs...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29068239/a-phytophthora-palmivora-extracellular-cystatin-like-protease-inhibitor-targets-papain-to-contribute-to-virulence-on-papaya
#13
Rebecca Gumtow, Dongliang Wu, Janice Uchida, Miaoying Tian
Papaya fruits, stems and leaves are rich in papain, a cysteine protease that has been shown to mediate plant defense against pathogens and insects. Yet the oomycete Phytophthora palmivora is a destructive pathogen that infects all parts of papaya plants, suggesting that it has evolved cysteine protease inhibitors to inhibit papain to enable successful infection. Out of five putative cystatin-like extracellular protease inhibitors (PpalEPICs) from P. palmivora transcriptomic sequence data, PpalEPIC8 appeared to be unique to P...
October 25, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29053757/generation-of-composite-persea-americana-mill-avocado-plants-a-proof-of-concept-study
#14
S Ashok Prabhu, Buyani Ndlovu, Juanita Engelbrecht, Noëlani van den Berg
Avocado (Persea americana (Mill.)), an important commercial fruit, is severely affected by Phytophthora Root Rot in areas where the pathogen is prevalent. However, advances in molecular research are hindered by the lack of a high-throughput transient transformation system in this non-model plant. In this study, a proof-of-concept is demonstrated by the successful application of Agrobacterium rhizogenes-mediated plant transformation to produce composite avocado plants. Two ex vitro strategies were assessed on two avocado genotypes (Itzamna and A0...
2017: PloS One
https://www.readbyqxmd.com/read/29053639/effects-of-silicon-amendment-on-soilborne-and-fruit-diseases-of-avocado
#15
Elizabeth K Dann, Duy P Le
The effects of silicon (Si) amendment have been studied in several plant/pathogen interactions; however, studies in horticultural tree crops are limited. Effects of amendment with soluble potassium silicate (AgSil(®)32, approximately 30% available Si), or milled cement building board by-products (Mineral Mulch (MM) or Mineral Dust (MD), containing 5% available Si) were investigated in field and greenhouse trials with avocado. Orchard soil drench applications with potassium silicate improved yield and quality of fruit, but visual health of trees declining from Phytophthora root rot (PRR) was not affected...
October 20, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29053435/temporal-occurrence-and-niche-preferences-of-phytophthora-species-causing-brown-rot-of-citrus-in-the-central-valley-of-california
#16
W Hao, Timothy D Miles, Frank N Martin, Greg Browne, Helga Forster, James E Adaskaveg
Brown rot of citrus fruits is caused by several species of Phytophthora and is currently of serious concern for the California citrus industry. Two species, P. syringae and P. hibernalis, are quarantine pathogens in China, a major export market for California citrus. To maintain trade and estimate the risk of exporting a quarantine pathogen, the distribution and frequency of Phytophthora species causing brown rot of oranges in major growing areas of California was investigated. Symptomatic fruit were collected from navel (winter to late spring) and Valencia (late spring to summer) orange orchards from 2013 to 2015...
October 20, 2017: Phytopathology
https://www.readbyqxmd.com/read/29051751/evaluation-of-different-pcr-based-assays-and-lamp-method-for-rapid-detection-of-phytophthora-infestans-by-targeting-the-ypt1-gene
#17
Mehran Khan, Benjin Li, Yue Jiang, Qiyong Weng, Qinghe Chen
Late blight, caused by the oomycete Phytophthora infestans, is one of the most devastating diseases affecting potato and tomato worldwide. Early diagnosis of the P. infestans pathogen causing late blight should be the top priority for addressing disease epidemics and management. In this study, we performed a loop-mediated isothermal amplification (LAMP) assay, conventional polymerase chain reaction (PCR), nested PCR, and real-time PCR to verify and compare the sensitivity and specificity of the reaction based on the Ypt1 (Ras-related protein) gene of P...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29036534/constitutive-phenolic-biomarkers-identify-na%C3%A3-ve-quercus-agrifolia-resistant-to-phytophthora-ramorum-the-causal-agent-of-sudden-oak-death
#18
Anna O Conrad, Brice A McPherson, David L Wood, Laurence V Madden, Pierluigi Bonello
Sudden oak death, caused by the invasive pathogen Phytophthora ramorum Werres, de Cock & Man in't Veld, can be deadly for Quercus agrifolia Neé (coast live oak, CLO). However, resistant trees have been observed in natural populations. The objective of this study was to examine if pre-attack (constitutive) levels of phenolic compounds can be used as biomarkers to identify trees likely to be resistant. Naïve trees were selected from a natural population and phloem was sampled for analysis of constitutive phenolics...
September 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29034626/-sequence-analysis-and-expression-patterns-of-histone-h2a-variants-in-phytophthora-infestans
#19
Xiaowen Wang, Liyun Guo
In eukaryotic cells, DNA is packaged inside the nucleus together with histones to form nucleosomes. Each histone molecule contains two of each core histone subunits H2A, H2B, H3 and H4. Among core histones, the H2A family is of great interest due to the high diversity of specialized variants. These variants have shown important role in critical cellular processes. Epigenetic mechanism in oomycetes is barely known. Phytophthora infestans is a severe pathogen and a model species in oomycetes. In this study, we studied the sequence and expression pattern of H2A variants of P...
November 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/29017458/lifestyle-gene-gain-and-loss-and-transcriptional-remodeling-cause-divergence-in-the-transcriptomes-of-phytophthora-infestans-and-pythium-ultimum-during-potato-tuber-colonization
#20
Audrey M V Ah-Fong, Jolly Shrivastava, Howard S Judelson
BACKGROUND: How pathogen genomes evolve to support distinct lifestyles is not well-understood. The oomycete Phytophthora infestans, the potato blight agent, is a largely biotrophic pathogen that feeds from living host cells, which become necrotic only late in infection. The related oomycete Pythium ultimum grows saprophytically in soil and as a necrotroph in plants, causing massive tissue destruction. To learn what distinguishes their lifestyles, we compared their gene contents and expression patterns in media and a shared host, potato tuber...
October 10, 2017: BMC Genomics
keyword
keyword
37240
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"