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https://www.readbyqxmd.com/read/28534133/silencing-of-the-rice-gene-lrr1-compromises-rice-xa21-transcript-accumulation-and-xa21-mediated-immunity
#1
Daniel F Caddell, Chang-Jin Park, Nicholas C Thomas, Patrick E Canlas, Pamela C Ronald
BACKGROUND: The rice immune receptor XA21 confers resistance to Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial leaf blight. We previously demonstrated that an auxilin-like protein, XA21 BINDING PROTEIN 21 (XB21), positively regulates resistance to Xoo. RESULTS: To further investigate the function of XB21, we performed a yeast two-hybrid screen. We identified 22 unique XB21 interacting proteins, including LEUCINE-RICH REPEAT PROTEIN 1 (LRR1), which we selected for further analysis...
December 2017: Rice
https://www.readbyqxmd.com/read/28508261/functional-roles-of-the-pepper-leucine-rich-repeat-protein-and-its-interactions-with-pathogenesis-related-and-hypersensitive-induced-proteins-in-plant-cell-death-and-immunity
#2
REVIEW
Jeum Kyu Hong, In Sun Hwang, Byung Kook Hwang
Pepper leucine-rich repeat protein (CaLRR1) interacts with defense response proteins to regulate plant cell death and immunity. This review highlights the current understanding of the molecular functions of CaLRR1 and its interactor proteins. Plant cell death and immune responses to microbial pathogens are controlled by complex and tightly regulated molecular signaling networks. Xanthomonas campestris pv. vesicatoria (Xcv)-inducible pepper (Capsicum annuum) leucine-rich repeat protein 1 (CaLRR1) serves as a molecular marker for plant cell death and immunity signaling...
May 15, 2017: Planta
https://www.readbyqxmd.com/read/28507764/-actinomyces-provencensis-sp-nov-corynebacterium-bouchesdurhonense-sp-nov-corynebacterium-provencense-sp-nov-and-xanthomonas-massiliensis-sp-nov-4-new-species-isolated-from-fresh-stools-of-obese-french-patients
#3
S Ndongo, C Andrieu, P-E Fournier, J-C Lagier, D Raoult
We report the main characteristics of 'Actinomyces provencensis' strain SN12(T) sp. nov., 'Corynebacterium bouchesdurhonense' strain SN14(T) sp. nov., 'Corynebacterium provencense' strain SN15(T) sp. nov. and 'Xanthomonas massiliensis' strain SN8(T) sp. nov., which were all isolated from stool samples from obese French patients.
July 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28507553/virus-bacteria-rice-co-infection-in-africa-field-estimation-reciprocal-effects-molecular-mechanisms-and-evolutionary-implications
#4
Charlotte Tollenaere, Severine Lacombe, Issa Wonni, Mariam Barro, Cyrielle Ndougonna, Fatoumata Gnacko, Drissa Sérémé, Jonathan M Jacobs, Eugénie Hebrard, Sebastien Cunnac, Christophe Brugidou
Simultaneous infection of a single plant by various pathogen species is increasingly recognized as an important modulator of host resistance and a driver of pathogen evolution. Because plants in agro-ecosystems are the target of a multitude of pathogenic microbes, co-infection could be frequent, and consequently important to consider. This is particularly true for rapidly intensifying crops, such as rice in Africa. This study investigated potential interactions between pathogens causing two of the major rice diseases in Africa: the Rice yellow mottle virus (RYMV) and the bacterium Xanthomonas oryzae pathovar oryzicola (Xoc) in order to: 1/ document virus-bacteria co-infection in rice in the field, 2/ explore experimentally their consequences in terms of symptom development and pathogen multiplication, 3/ test the hypothesis of underlying molecular mechanisms of interactions and 4/ explore potential evolutionary consequences...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28506932/refined-annotation-of-the-complete-genome-of-the-phytopathogenic-and-xanthan-producing-xanthomonas-campestris-pv-campestris-strain-b100-based-on-rna-sequence-data
#5
Rabeaa S Alkhateeb, Christian Rückert, Oliver Rupp, Boas Pucker, Gerd Hublik, Daniel Wibberg, Karsten Niehaus, Alfred Pühler, Frank-Jörg Vorhölter
Bioinformatics tools and gene expression data were applied to identify new genes and to enhance the accuracy in genomic feature predictions for Xanthomonas campestris pv. campestris B100, a pathogen of cruciferous plants and model strain for the biosynthesis of xanthan, a polysaccharide with a multitude of commercial applications as a thickening agent. Results from 5'-enriched RNA end-sequencing and total transcriptome RNA-seq experiments were used for this purpose. Functional gene annotations were updated where new evidence had emerged and start codon predictions were enhanced for 153 protein-coding genes (CDS)...
May 12, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28502957/1-methoxypyrrole-2-carboxamide-a-new-pyrrole-compound-isolated-from-streptomyces-griseocarneus-sww368
#6
Watsapon Wattanasuepsin, Bungonsiri Intra, Jirayut Euanorasetr, Yoshihiro Watanabe, Ratchanee Mingma, Wataru Fukasawa, Mihoko Mori, Atsuko Matsumoto, Kazuro Shiomi, Watanalai Panbangred
A new pyrrole compound, 1-methoxypyrrole-2-carboxamide, was obtained from a culture broth of Streptomyces griseocarneus SWW368, which was isolated from the rhizospheric soil under a Para rubber tree (Hevea brasiliensis). The chemical structure was elucidated by 1D NMR, 2D NMR, and MS, as a pyrrole ring with a N-methoxy group and a primary amide group. It exhibited antibacterial properties against Kocuria rhizophila, Staphylococcus aureus and Xanthomonas campestris pv. oryzae; however, cytotoxicity of the compound at 714 μM against several mammalian tumor cell lines, i...
May 15, 2017: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/28500712/time-resolved-energetics-of-photoprocesses-in-prokaryotic-phytochrome-related-photoreceptors
#7
Aba Losi, Hernán R Bonomi, Norbert Michael, Kun Tang, Kai-Hong Zhao
Time-resolved photoacoustics (PA) is uniquely able to explore the energy landscape of photoactive proteins and concomitantly detects light-induced volumetric changes (ΔV) accompanying the formation and decay of transient species in a time window between ca. 20 ns and 5 μs. Here, we report PA measurements on diverse photochromic bilin-binding photoreceptors of prokaryotic origin: (1) the chromophore-binding GAF3 domain of the red (R)/green (G) switching cyanobacteriochrome 1393 (Slr1393g3) from Synechocystis; (2) the red/far red (R/FR) Synechocystis Cph1 phytochrome; (3) full-length and truncated constructs of Xanthomonas campestris bacteriophytochrome (XccBphP), absorbing up to the NIR spectral region...
May 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28500046/roxb-is-a-novel-type-of-rubber-oxygenase-that-combines-properties-of-rubber-oxygenase-roxa-and-latex-clearing-protein-lcp
#8
Jakob Birke, Wolf Röther, Dieter Jendrossek
Only two types of rubber oxygenases, rubber oxygenase (RoxA) and latex clearing protein (Lcp), have been described so far. RoxAs are c-type cytochromes of ≈70 kDa produced by Gram-negative rubber-degrading bacteria and cleave polyisoprene into 12-oxo-4,8-dimethyltrideca-4,8-diene-1-al (ODTD), a C15 oligo-isoprenoid, as major end product. Lcps are common among Gram-positive rubber-degraders and don't share amino acid sequence similarities with RoxA proteins (RoxAs). Furthermore, Lcps have much smaller molecular masses (≈40 kDa), are b-type cytochromes and cleave polyisoprene to a mixture of C20, C25, C30 and higher oligo-isoprenoids as end products...
May 12, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28493954/a-model-for-predicting-xanthomonas-arboricola-pv-pruni-growth-as-a-function-of-temperature
#9
Gerard Morales, Isidre Llorente, Emilio Montesinos, Concepció Moragrega
A two-step modeling approach was used for predicting the effect of temperature on the growth of Xanthomonas arboricola pv. pruni, causal agent of bacterial spot disease of stone fruit. The in vitro growth of seven strains was monitored at temperatures from 5 to 35°C with a Bioscreen C system, and a calibrating equation was generated for converting optical densities to viable counts. In primary modeling, Baranyi, Buchanan, and modified Gompertz equations were fitted to viable count growth curves over the entire temperature range...
2017: PloS One
https://www.readbyqxmd.com/read/28493340/cyclic-di-gmp-signalling-in-the-virulence-and-environmental-adaptation-of-xanthomonas-campestris
#10
Robert P Ryan, Yvonne Fouhy, Jean F Lucey, Bo-Le Jiang, Yong-Qiang He, Jia-Xun Feng, Ji-Liang Tang, J Maxwell Dow
No abstract text is available yet for this article.
May 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28493339/high-resolution-transcriptional-analysis-of-the-regulatory-influence-of-cell-to-cell-signalling-reveals-novel-genes-that-contribute-to-xanthomonas-phytopathogenesis
#11
Shi-Qi An, Melanie Febrer, Yvonne McCarthy, Dong-Jie Tang, Leah Clissold, Gemy Kaithakottil, David Swarbreck, Ji-Liang Tang, Jane Rogers, J Maxwell Dow, Robert P Ryan
No abstract text is available yet for this article.
May 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28488467/-candidatus-liberibacter-asiaticus-encodes-a-functional-salicylic-acid-sa-hydroxylase-that-degrades-sa-to-suppress-plant-defenses
#12
Jinyun Li, Zhiqian Pang, Pankaj Trivedi, Xiaofeng Zhou, Xiaobao Ying, Hongge Jia, Nian Wang
Pathogens from the fastidious, phloem-restricted 'Candidatus Liberibacter' species cause the devastating Huanglongbing (HLB) disease in citrus worldwide and cause diseases on many solanaceous crops and plants in the Apiaceae family. However, little is known about the pathogenic mechanisms due to the difficulty in culturing the corresponding Liberibacters. Here we report that the citrus HLB pathogen 'Ca. L. asiaticus' (CLas) uses an active salicylate (SA) hydroxylase SahA to degrade SA and suppress plant defenses...
May 10, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28471538/differential-accumulation-of-xanthomonas-campestris-pv-campestris-proteins-during-the-interaction-with-the-host-plant-contributions-of-an-in-vivo-system
#13
Cristiane Santos, Mariana Rocha Maximiano, Daiane G Ribeiro, Osmundo B Oliveira-Neto, André M Murad, Octávio L Franco, Angela Mehta
Xanthomonas campestris pv. campestris (Xcc) is the causal agent of black rot, a highly destructive disease that affects all brassicas. This work aimed to study the interaction Xcc-Brassica oleracea using an in vivo system in an attempt to identify proteins involved in pathogenicity. We used label-free shotgun 2D-nanoUPLC/MS(E) to analyze Xcc proteins in three conditions: in the interaction with susceptible (REK) and resistant (REU) plants and in culture medium (control condition). A model of Xcc-susceptible host interaction is proposed and shows that Xcc increases the abundance of several crucial proteins for infection and cell protection...
May 4, 2017: Proteomics
https://www.readbyqxmd.com/read/28456302/label-free-quantitative-proteomic-analysis-of-inhibition-of-xanthomonas-axonopodis-pv-citri-by-the-novel-bactericide-fubianezuofeng
#14
Manni Gao, Lu Yu, Pei Li, Xianpeng Song, Zhuo Chen, Ming He, Baoan Song
To understand the antibacterial mechanism of the new bactericide 2-(methylsulfonyl)-5- (4-fluorobenzyl)-1, 3, 4-oxadiazole (Generic name: Fubianezuofeng), we performed label-free quantitative proteomics analysis of the response of Xanthomonas axonopodis pv. citri (Xac) strain 29-1 to Fubianezuofeng. A total of 1133 proteins were identified in the treatment and control groups. Upon treatment with the 1/2 minimum inhibitory concentration (MIC), 339 proteins were found to be differentially expressed (fold changes>1...
May 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/28450852/pan-genomic-analysis-permits-differentiation-of-virulent-and-non-virulent-strains-of-xanthomonas-arboricola-that-cohabit-prunus-spp-and-elucidate-bacterial-virulence-factors
#15
Jerson Garita-Cambronero, Ana Palacio-Bielsa, María M López, Jaime Cubero
Xanthomonas arboricola is a plant-associated bacterial species that causes diseases on several plant hosts. One of the most virulent pathovars within this species is X. arboricola pv. pruni (Xap), the causal agent of bacterial spot disease of stone fruit trees and almond. Recently, a non-virulent Xap-look-a-like strain isolated from Prunus was characterized and its genome compared to pathogenic strains of Xap, revealing differences in the profile of virulence factors, such as the genes related to the type III secretion system (T3SS) and type III effectors (T3Es)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28448536/lateral-flow-immunoassay-for-on-site-detection-of-xanthomonas-arboricola-pv-pruni-in-symptomatic-field-samples
#16
Pablo López-Soriano, Patricia Noguera, María Teresa Gorris, Rosa Puchades, Ángel Maquieira, Ester Marco-Noales, María M López
Xanthomonas arboricola pv. pruni is a quarantine pathogen and the causal agent of the bacterial spot disease of stone fruits and almond, a major threat to Prunus species. Rapid and specific detection methods are essential to improve disease management, and therefore a prototype of a lateral flow immunoassay (LFIA) was designed for the detection of X. arboricola pv. pruni in symptomatic field samples. It was developed by producing polyclonal antibodies which were then combined with carbon nanoparticles and assembled on nitrocellulose strips...
2017: PloS One
https://www.readbyqxmd.com/read/28440700/selection-and-assessment-of-plant-growth-promoting-rhizobacteria-pgpr-for-biological-control-of-multiple-plant-diseases
#17
Ke Liu, Molli Newman, John A McInroy, Chia-Hui Hu, Joseph W Kloepper
A study was designed to screen individual strains of plant growth-promoting rhizobacteria (PGPR) for broad-spectrum disease suppression in vitro and in planta. In a preliminary screen, 28 of 196 strains inhibited eight different tested pathogens in vitro. In a secondary screen, these 28 strains showed broad spectrum antagonistic activity to six different genera of pathogens, and 24 of the 28 strains produced five traits reported to be related to plant growth promotion, including nitrogen fixation, phosphate solubilization, indole-3-acetic acid (IAA) production, siderophore production, and biofilm formation...
April 25, 2017: Phytopathology
https://www.readbyqxmd.com/read/28437556/inheritance-of-bacterial-spot-resistance-in-capsicum-annuum-var-annuum
#18
L R A Silva, R Rodrigues, S Pimenta, J W S Correa, M S B Araújo, C S Bento, C P Sudré
Since 2008, Brazil is the largest consumer of agrochemicals, which increases production costs and risks of agricultural products, environment, and farmers' contamination. Sweet pepper, which is one of the main consumed vegetables in the country, is on top of the list of the most sprayed crops. The bacterial spot, caused by Xanthomonas spp, is one of the most damaging diseases of pepper crops. Genetic resistant consists of a suitable way of disease control, but development of durable resistant cultivars as well as understanding of plant-bacterium interaction is being a challenge for plant breeders and pathologists worldwide...
April 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28425831/investigating-the-phylogenetic-range-of-gibberellin-biosynthesis-in-bacteria
#19
Raimund Nagel, Reuben J Peters
Certain plant-associated microbes can produce gibberellin (GA) phytohormones, as first described for the rice fungal pathogen Gibberella fujikuroi and, more recently, for bacteria, including several rhizobia and the rice bacterial pathogen Xanthomonas oryzae pv. oryzicola. The relevant enzymes are encoded by a biosynthetic operon that exhibits both a greater phylogenetic range and scattered distribution among plant-associated bacteria. Here, the phylogenetic distribution of this operon was investigated. To demonstrate conserved functionality, the enzymes encoded by the disparate operon from X...
April 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28423458/dissecting-virulence-function-from-recognition-cell-death-suppression-in-nicotiana-benthamiana-by-xopq-hopq1-family-effectors-relies-on-eds1-dependent-immunity
#20
Norman Adlung, Ulla Bonas
Many Gram-negative plant pathogenic bacteria express effector proteins of the XopQ/HopQ1 family which are translocated into plant cells via the type III secretion system during infection. In Nicotiana benthamiana, recognition of XopQ/HopQ1 proteins induces an effector-triggered immunity (ETI) reaction which is not associated with strong cell death but renders plants immune against Pseudomonas syringae and Xanthomonas campestris pv. vesicatoria strains. Additionally, XopQ suppresses cell death in N. benthamiana when transiently co-expressed with cell death inducers...
April 19, 2017: Plant Journal: for Cell and Molecular Biology
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