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https://www.readbyqxmd.com/read/28746617/resistance-of-xanthomonas-euvesicatoria-strains-from-brazilian-pepper-to-copper-and-zinc-sulfates
#1
Maysa S Areas, Ricardo M Gonçalves, José M Soman, Ronaldo C Souza, Ricardo Gioria, Tadeu A F DA Silva, Antonio C Maringoni
Bacterial spot, caused by Xanthomonas spp., is one of the major bacterial diseases in pepper (Capsicum annuum L.). The infection results in reduced crop yield, particularly during periods of high rainfall and temperature, due to the low efficiency of chemical control with copper bactericides. This study evaluated the copper and zinc sulfate sensitivity of 59 pathogenic strains of Xanthomonas euvesicatoria isolated from pepper plants produced in various regions throughout Brazil. Both the respective sulfates and a mixture thereof was evaluated at 50, 100, 200 and 400 μg...
July 24, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28725234/major-novel-qtl-for-resistance-to-cassava-bacterial-blight-identified-through-a-multi-environmental-analysis
#2
Johana C Soto Sedano, Rubén E Mora Moreno, Boby Mathew, Jens Léon, Fabio A Gómez Cano, Agim Ballvora, Camilo E López Carrascal
Cassava, Manihot esculenta Crantz, has been positioned as one of the most promising crops world-wide representing the staple security for more than one billion people mainly in poor countries. Cassava production is constantly threatened by several diseases, including cassava bacterial blight (CBB) caused by Xanthomonas axonopodis pv. manihotis (Xam), it is the most destructive disease causing heavy yield losses. Here, we report the detection and localization on the genetic map of cassava QTL (Quantitative Trait Loci) conferring resistance to CBB...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28725231/chloroplast-redox-status-modulates-genome-wide-plant-responses-during-the-non-host-interaction-of-tobacco-with-the-hemibiotrophic-bacterium-xanthomonas-campestris-pv-vesicatoria
#3
Juan J Pierella Karlusich, Matias D Zurbriggen, Fahimeh Shahinnia, Sophia Sonnewald, Uwe Sonnewald, Seyed A Hosseini, Mohammad-Reza Hajirezaei, Néstor Carrillo
Non-host resistance is the most ample and durable form of plant resistance against pathogen infection. It includes induction of defense-associated genes, massive metabolic reprogramming, and in many instances, a form of localized cell death (LCD) at the site of infection, purportedly designed to limit the spread of biotrophic and hemibiotrophic microorganisms. Reactive oxygen species (ROS) have been proposed to act as signals for LCD orchestration. They are produced in various cellular compartments including chloroplasts, mitochondria and apoplast...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28716054/combined-biotic-stresses-trigger-similar-transcriptomic-responses-but-contrasting-resistance-against-a-chewing-herbivore-in-brassica-nigra
#4
Christelle Bonnet, Steve Lassueur, Camille Ponzio, Rieta Gols, Marcel Dicke, Philippe Reymond
BACKGROUND: In nature, plants are frequently exposed to simultaneous biotic stresses that activate distinct and often antagonistic defense signaling pathways. How plants integrate this information and whether they prioritize one stress over the other is not well understood. RESULTS: We investigated the transcriptome signature of the wild annual crucifer, Brassica nigra, in response to eggs and caterpillars of Pieris brassicae butterflies, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv...
July 17, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28713567/genetically-engineered-bananas-resistant-to-xanthomonas-wilt-disease-and-nematodes
#5
REVIEW
Leena Tripathi, Howard Atkinson, Hugh Roderick, Jerome Kubiriba, Jaindra N Tripathi
Banana is an important staple food crop feeding more than 100 million Africans, but is subject to severe productivity constraints due to a range of pests and diseases. Banana Xanthomonas wilt caused by Xanthomonas campestris pv. musacearum is capable of entirely destroying a plantation while nematodes can cause losses up to 50% and increase susceptibility to other pests and diseases. Development of improved varieties of banana is fundamental in order to tackle these challenges. However, the sterile nature of the crop and the lack of resistance in Musa germplasm make improvement by traditional breeding techniques either impossible or extremely slow...
May 2017: Food and energy security
https://www.readbyqxmd.com/read/28711983/xanthan-gum-production-using-jackfruit-seed-powder-based-medium-optimization-and-characterization
#6
R Felicia Katherine, C Muthukumaran, G Sharmila, N Manoj Kumar, K Tamilarasan, R Jaiganesh
Xanthan gum (XG) production by Xanthomonas campestris NCIM 2961 using jackfruit seed powder (JSP) as a novel substrate was reported. Central composite design (CCD) of response surface method (RSM) was used to evaluate the linear and interaction effects of five medium variables (JSP, peptone, citric acid, K2HPO4 and KH2PO4) for XG production. Maximum XG production (51.62 g/L) was observed at the optimum level of JSP (4 g/L), peptone (0.93 g/L), citric acid (0.26 g/L), K2HPO4 (1.29 g/L) and KH2PO4 (0.5 g/L)...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28706525/functional-marker-assisted-improvement-of-stable-cytoplasmic-male-sterile-lines-of-rice-for-bacterial-blight-resistance
#7
Jegadeesan Ramalingam, Palanisamy Savitha, Ganesh Alagarasan, Ramasamy Saraswathi, Ranganathan Chandrababu
Bacterial blight (BB), caused by Xanthomonas oryzae pv.oryzae is one among the major diseases in rice, which in severe condition cause losses up to 60% in total yield. Marker assisted pyramiding of three broad spectrum BB resistance genes (xa5, xa13, and Xa21) in prominent rice varieties is the most economical and effective strategy for the management of the BB disease. We report here the pyramiding of three genes (xa5, xa13, and Xa21) in maintainer lines (CO 2B, CO 23B, and CO 24B) of three promising wild abortive cytoplasmic male sterile lines (CO 2A, CO 23A, and CO 24A) through functional markers assisted back cross breeding...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28705973/complete-genome-sequences-of-three-xanthomonas-citri-strains-from-texas
#8
Alejandra Munoz Bodnar, Gem Santillana, Vessela Mavrodieva, Zhaowei Liu, Mark Nakhla, Dean W Gabriel
The complete genome sequences of three Xanthomonas citri strains isolated from lime trees in Texas were found to belong to the A(w) group. All carried nearly identical large plasmids with similarity to those of a citrus canker strain from India and to xanthomonads from Africa and Colombia. All three strains harbored unusual pthA homologs.
July 13, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28699375/novel-insights-into-tat-pathway-in-xanthomonas-oryzae-pv-oryzae-stress-adaption-and-virulence-identification-and-characterization-of-tat-dependent-translocation-proteins
#9
Guichun Wu, Panpan Su, Bo Wang, Yuqiang Zhang, Guoliang Qian, Fengquan Liu
Xanthomonas oryzae pv. oryzae, an economically important bacterium, causes a serious disease in rice production worldwide called bacterial leaf blight. How X. oryzae pv. oryzae infects rice and causes symptoms remains incompletely understood. Our earlier works demonstrated that the twin-arginine translocation (Tat) pathway plays an vital role in X. oryzae pv. oryzae fitness and virulence but the underlying mechanism is unknown. In this study, we used strain PXO99(A) as a working model, and identified 15 potential Tat-dependent translocation proteins (TDTP) by using comparative proteomics and bioinformatics analyses...
July 12, 2017: Phytopathology
https://www.readbyqxmd.com/read/28699009/bio-fabrication-of-silver-nanoparticles-using-the-leaf-extract-of-an-ancient-herbal-medicine-dandelion-taraxacum-officinale-evaluation-of-their-antioxidant-anticancer-potential-and-antimicrobial-activity-against-phytopathogens
#10
Rijuta G Saratale, Giovanni Benelli, Gopalakrishnan Kumar, Dong Su Kim, Ganesh D Saratale
In recent years, the use of nanoparticle-based antimicrobials has been increased due to many advantages over conventional agrochemicals. This study investigates the utilization of common medicinal plant dandelion, Taraxacum officinale, for the synthesis of silver nanoparticles (TOL-AgNPs). AgNPs were evaluated for antimicrobial activity against two important phytopathogens, Xanthomonas axonopodis and Pseudomonas syringae. The morphology, size, and structure of TOL-AgNPs were characterized using UV-visible spectroscopy and X-ray diffraction (XRD)...
July 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28698641/a-transcription-activator-like-effector-tal7-of-xanthomonas-oryzae-pv-oryzicola-activates-rice-gene-os09g29100-to-suppress-rice-immunity
#11
Lulu Cai, Yanyan Cao, Zhengyin Xu, Wenxiu Ma, Muhammad Zakria, Lifang Zou, Zaiquan Cheng, Gongyou Chen
Xanthomonas oryzae pv. oryzicola (Xoc) and X. oryzae pv. oryzae (Xoo) cause bacterial leaf streak (BLS) and bacterial leaf blight (BLB) in rice, respectively. Unlike Xoo, endogenous avirulence-resistance (avr-R) gene interactions have not been identified in the Xoc-rice pathosystem; however, both pathogens possess transcription activator-like effectors (TALEs) that are known to modulate R or S genes in rice. The transfer of individual tal genes from Xoc RS105 (hypervirulent) into Xoc YNB0-17 (hypovirulent) led to the identification of tal7, which suppressed avrXa7-Xa7 mediated defense in rice containing an Xa7 R gene...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28695652/production-of-functionalized-oligo-isoprenoids-by-enzymatic-cleavage-of-rubber
#12
Wolf Röther, Jakob Birke, Stephanie Grond, Jose Manuel Beltran, Dieter Jendrossek
In this study, we show the proof of concept for the production of defined oligo-isoprenoids with terminal functional groups that can be used as starting materials for various purposes including the synthesis of isoprenoid-based plastics. To this end, we used three types of rubber oxygenases for the enzymatic cleavage of rubber [poly(cis-1,4-isoprene)]. Two enzymes, rubber oxygenase RoxAXsp and rubber oxygenase RoxBXsp , originate from Xanthomonas sp. 35Y; the third rubber oxygenase, latex-clearing protein (LcpK30 ), is derived from Gram-positive rubber degraders such as Streptomyces sp...
July 11, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28694803/comparative-genomics-identifies-a-novel-conserved-protein-hpat-in-proteobacterial-type-iii-secretion-systems-that-do-not-possess-the-putative-translocon-protein-hrpf
#13
Céline Pesce, Jonathan M Jacobs, Edwige Berthelot, Marion Perret, Taca Vancheva, Claude Bragard, Ralf Koebnik
Xanthomonas translucens is the causal agent of bacterial leaf streak, the most common bacterial disease of wheat and barley. To cause disease, most xanthomonads depend on a highly conserved type III secretion system, which translocates type III effectors into host plant cells. Mutagenesis of the conserved type III secretion gene hrcT confirmed that the X. translucens type III secretion system is required to cause disease on the host plant barley and to trigger a non-host hypersensitive response (HR) in pepper leaves...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28693412/proteomics-based-identification-of-differentially-abundant-proteins-reveals-adaptation-mechanisms-of-xanthomonas-citri-subsp-citri-during-citrus-sinensis-infection
#14
Leandro M Moreira, Márcia R Soares, Agda P Facincani, Cristiano B Ferreira, Rafael M Ferreira, Maria I T Ferro, Fábio C Gozzo, Érica B Felestrino, Renata A B Assis, Camila Carrião M Garcia, João C Setubal, Jesus A Ferro, Julio C F de Oliveira
BACKGROUND: Xanthomonas citri subsp. citri (Xac) is the causal agent of citrus canker. A proteomic analysis under in planta infectious and non-infectious conditions was conducted in order to increase our knowledge about the adaptive process of Xac during infection. RESULTS: For that, a 2D-based proteomic analysis of Xac at 1, 3 and 5 days after inoculation, in comparison to Xac growth in NB media was carried out and followed by MALDI-TOF-TOF identification of 124 unique differentially abundant proteins...
July 11, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28687734/hpab-dependent-secretion-of-type-iii-effectors-in-the-plant-pathogens-ralstonia-solanacearum-and-xanthomonas-campestris-pv-vesicatoria
#15
Fabien Lonjon, David Lohou, Anne-Claire Cazalé, Daniela Büttner, Barbara Gomes Ribeiro, Claire Péanne, Stéphane Genin, Fabienne Vailleau
Plant pathogenic bacteria exerts their pathogenicity through the injection of large repertoires of type III effectors (T3Es) into plant cells, a mechanism controlled in part by type III chaperones (T3Cs). In Ralstonia solanacearum, the causal agent of bacterial wilt, little is known about the control of type III secretion at the post-translational level. Here, we provide evidence that the HpaB and HpaD proteins do act as bona fide R. solanacearum class IB chaperones that associate with several T3Es. Both proteins can dimerize but do not interact with each other...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28687646/aerobiological-stability-of-different-species-of-gram-negative-bacteria-including-well-known-biothreat-simulants-in-single-cell-particles-and-cell-clusters-of-different-composition
#16
Marius Dybwad, Gunnar Skogan
The ability to perform controlled experiments with bioaerosols is a fundamental enabler of many bioaerosol research disciplines. A practical alternative to using hazardous biothreat agents, e.g. for detection equipment development and testing, involves using appropriate model organisms (simulants). Several species of Gram-negative bacteria have been used or proposed as biothreat simulants. The appropriateness of different bacterial genera, species, and strains as simulants is however still debated. Here we report aerobiological stability characteristics of four species of Gram-negative bacteria (Pantoea agglomerans, Serratia marcesens, Escherichia coli, and Xanthomonas arboricola) in single-cell particles and cell clusters produced using four spray liquids (H2O, phosphate-buffered saline[PBS], spent culture medium[SCM], and SCM:PBS mixture)...
July 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28687515/effect-of-a-pseudomonas-fluorescens-tailocin-against-phytopathogenic-xanthomonas-observed-by-atomic-force-microscopy
#17
Maricruz Fernandez, Agustina Godino, Analía Príncipe, Gustavo M Morales, Sonia Fischer
Phage tail-like bacteriocins, called tailocins, represent a class of protein complexes produced by a multitude of bacteria. Pseudomonas fluorescens SF4c, a strain isolated from wheat rhizosphere, produces a bacteriocin similar to phage tail-like pyocins of Pseudomonas aeruginosa. This tailocin has antimicrobial activity against several phytopathogenic strains of the genus Xanthomonas and Pseudomonas. In this work, the effect of the SF4c tailocin on the phytopathogenic strain X. axonopodis pv vesicatoria Xcv Bv5-4a was analyzed through Atomic Force Microscopy (AFM)...
July 5, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28686086/a-risk-assessment-model-for-bacterial-leaf-spot-bls-of-pepper-capsicum-annuum-l-caused-by-xanthomonas-euvesicatoria-based-on-concentrations-of-macronutrients-and-micronutrients-and-micronutrient-ratios
#18
Bhabesh Dutta, David B Langston, Xuelin Luo, Jeremy Kichler, Scott Carlson, Ron Gitaitis
The phytopathogenic bacterium Xanthomonas euvesicatoria causes bacterial leaf spot (BLS) of pepper and has a worldwide distribution. BLS is difficult to control and an integrated management strategy that incorporates crop rotation, use of clean seeds and clean plants, weed control, resistant varieties, and applications of bactericides, biocontrol agents, and systemic acquired resistance (SAR) inducers is generally recommended. However, even with that arsenal of weapons, BLS can still be responsible for severe losses under favorable environmental conditions...
July 7, 2017: Phytopathology
https://www.readbyqxmd.com/read/28677478/detection-and-characterization-of-xanthomonas-vasicola-pv-vasculorum-cobb-1894-comb-nov-causing-bacterial-leaf-streak-of-corn-in-the-united-states
#19
Jillian Lang, Elysa DuCharme, Jorge Ibarra Caballero, Emily Luna, Terra Hartman, Mary Ortiz-Castro, Kevin Korus, John Rascoe, Tamra A Jackson, Kirk Broders, Jan Leach
Bacterial leaf streak of corn (Zea mays) recently reached epidemic levels in three corn-growing states, and has been detected in another six states in the central United States. Xanthomonas vasicola was identified as the causal agent of this disease. A multi-locus sequence alignment (MLSA) of six housekeeping genes and comparison of average nucleotide identity (ANI) from draft genome sequence were used to confirm phylogenetic relationships and classification of this bacterium relative to other Xanthomonas vasicola strains...
July 5, 2017: Phytopathology
https://www.readbyqxmd.com/read/28677256/xanthomonas-campestris-pv-musacearum-a-major-constraint-to-banana-plantain-and-enset-production-in-central-and-east-africa-over-the-past-decade
#20
Valentine Nakato, George Mahuku, Teresa Coutinho
Taxonomy: Bacteria; Phylum Proteobacteria; Class Gammaproteobacteria; Order Xanthomonadales; Family Xanthomonadaceae; Genus Xanthomonas; currently classified as X. campestris pv. musacearum (Xcm). However, fatty acid methyl esters analysis, genetic and genomic evidence suggest that this pathogen is X. vasicola and resides in a separate pathovar. Isolation and detection: Xcm can be isolated on Yeast Peptone Glucose Agar (YPGA), Cellobiose Cephalexin Agar and Yeast Tryptone Sucrose Agar (YTSA) complemented with 5-flouro-uracil, cephalexin and cycloheximide to confer semi-selectivity...
July 5, 2017: Molecular Plant Pathology
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