journal
MENU ▼
Read by QxMD icon Read
search

Molecular Plant Pathology

journal
https://www.readbyqxmd.com/read/28411402/transcriptomics-of-cereal-fusarium-graminearum-interactions-what-we-have-learned-so-far
#1
REVIEW
Kemal Kazan, Donald M Gardiner
The ascomycete fungal pathogen Fusarium graminearum causes the globally important Fusarium head blight (FHB) disease on cereal hosts such as wheat, barley and maize. In addition to reducing grain yield, infection by this pathogen causes major quality losses. In particular, the contamination of food and feed with the F. graminearum trichothecene toxin deoxynivalenol (DON) can have many adverse short- and long-term effects on human and animal health. During the last decade, the interaction between F. graminearum and both cereal and model hosts has been extensively studied through transcriptome analyses...
April 15, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28401640/bacterial-and-plant-natriuretic-peptides-improve-plant-defense-responses-against-pathogens
#2
Florencia A Ficarra, Carolina Grandellis, Betiana S Garavaglia, Natalia Gottig, Jorgelina Ottado
Plant natriuretic peptides (PNPs) are implicated in the regulation of ions and water homeostasis, and their participation in the plant immune response has been also proposed. Xanthomonas citri subsp. citri contains a gene encoding a PNP-like protein (XacPNP) that has no homologues in other bacteria. XacPNP mimics its Arabidopsis thaliana homolog AtPNP-A by modifying host responses to create favorable conditions for pathogen survival. However, the ability of XacPNP to induce plant defense responses was never investigated...
April 12, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28390170/involvement-of-salicylic-acid-ethylene-and-jasmonate-acid-signaling-pathways-in-susceptibility-of-tomato-for-fusarium-oxysporum
#3
Xiaotang Di, Jo Gomila, Frank L W Takken
Phytohormones such as salicylic acid (SA), ethylene (ET) and jasmonic acid (JA) play key roles in plant defense following pathogen attack. Involvement of these hormones in susceptibility following Fusarium oxysporum (Fo) infection has mostly been studied in Arabidopsis thaliana. Fo, however, causes vascular wilt disease in a broad range of crops, including tomato (Solanum lycopersicum). Surprisingly little is known about the involvement of these phytohormones in susceptibility of tomato towards Fo f. sp. lycopersici (Fol)...
April 8, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28390168/molecular-and-pathobiological-characterization-of-sixty-one-potato-mop-top-virus-full-length-cdnas-reveals-great-variability-of-the-virus-in-the-center-of-potato-domestication-novel-genotypes-and-evidence-for-recombination
#4
Pruthvi Kalyandurg, Jose Fernando Gil, Nina I Lukhovitskaya, Betty Flores, Giovanna Müller, Carlos Chuquillanqui, Ladislao Palomino, Aderito Monjane, Ian Barker, Jan Kreuze, Eugene I Savenkov
Evolutionary divergence of potato mop-top virus (PMTV), a tri-partite single-stranded RNA virus, is exceptionally low, based on the analysis of sequences obtained from isolates from Europe, Asia, and North America. In general, RNA viruses exist as dynamic populations of closely related and recombinant genomes that are subjected to continuous genetic variation. The reason behind the low genetic variation of PMTV remains unclear. The question remains whether low variability is a shared property of all PMTV isolates or is a result of the limited number of isolates characterized so far...
April 8, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28387997/genome-wide-functional-characterization-of-putative-peroxidases-in-the-head-blight-fungus-fusarium-graminearum
#5
Yoonji Lee, Hokyoung Son, Ji Young Shin, Gyung Ja Choi, Yin-Won Lee
Reactive oxygen species (ROS) are associated with various developmental processes and host-pathogen interactions in pathogenic fungi. Peroxidases are a group of ROS-detoxifying enzymes that are involved in the oxidative stress response and in a variety of physiological processes. In this study, we performed a genome-wide functional characterization of putative peroxidase genes in Fusarium graminearum, a head blight pathogen of cereal crops. We identified 31 putative peroxidase genes and generated deletion mutants for these genes...
April 7, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28387986/the-fifty-distal-amino-acids-of-the-2a-hp-homing-protein-of-grapevine-fanleaf-virus-elicit-a-hypersensitive-reaction-on-nicotiana-occidentalis
#6
Isabelle R Martin, Emmanuelle Vigne, François Berthold, Véronique Komar, Olivier Lemaire, Marc Fuchs, Corinne Schmitt-Keichinger
Avirulence factors are critical for the arm's race between a virus and its host in determining incompatible reactions. The response of plants to viruses from the genus Nepovirus in the family Secoviridae, including grapevine fanleaf virus (GFLV), is well characterized although the nature and characteristics of a viral avirulence factor remains elusive. By using infectious clones of GFLV strains F13 and GHu in a reverse genetics approach with wild-type, assortant and chimeric viruses, the determinant of necrotic lesions caused by GFLV-F13 on inoculated leaves of Nicotiana occidentalis was mapped to the RNA2-encoded protein 2A(HP) , particularly to its fifty C-terminal amino acids...
April 7, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28378935/the-pathogenic-development-of-sclerotinia-sclerotiorum-in-soybean-requires-specific-host-nadph-oxidases
#7
Ashish Ranjan, Dhileepkumar Jayaraman, Craig Grau, John H Hill, Steven A Whitham, Jean-Michel Ané, Damon L Smith, Mehdi Kabbage
The plant membrane localized NADPH oxidases, also known as respiratory burst oxidase homologs (RBOHs), play crucial roles in various cellular activities including plant disease responses, and are a major source of reactive oxygen species (ROS). Sclerotinia sclerotiorum is a cosmopolitan fungal pathogen that causes Sclerotinia stem rot (SSR) in soybean. Via a key virulence factor, oxalic acid, it induces programmed cell death (PCD) in the host plant, a process that is reliant on ROS generation. In this study, using protein sequence similarity searches, we have identified seventeen soybean RBOHs (GmRBOHs) and studied their contribution to SSR disease development, drought tolerance and nodulation...
April 5, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28378891/disruption-of-actin-motor-function-due-to-momyo5-mutation-impairs-host-penetration-and-pathogenicity-in-magnaporthe-oryzae
#8
Wei Tang, Chuyun Gao, Jingzhen Wang, Ziyi Yin, Jinlong Zhang, Jun Ji, Haifeng Zhang, Xiaobo Zheng, Zhengguang Zhang, Ping Wang
Actin motor myosin proteins are driving forces behind active transport of vesicles, and more than 20 classes of myosin were found to contribute to a wide range of cellular processes, including endocytosis and exocytosis, autophagy, cytokinesis, and actin cytoskeleton. In Saccharomyces cerevisiae, class V myosin Myo2 (ScMyo2p) is important for the transport of distinct sets of cargo to regions of the cell along the cytoskeleton for polarized growth. To study whether myosins play a role in the infectious structure appressorium formation or function of the rice blast fungus Magnaporthe oryzae, we identified MoMyo5 as an ortholog of ScMyo2p and characterized its function...
April 5, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28371183/the-hcpro-from-the-potyviridae-family-an-enviable-multitasking-helper-component-that-every-virus-would-like-to-have
#9
REVIEW
Adrián A Valli, Araiz Gallo, Bernardo Rodamilans, Juan José López-Moya, Juan Antonio García
RNA viruses have very compact genomes, so that they provide a unique opportunity to study how the evolution works to optimize the use of very limited genomic information. A widespread viral strategy to solve this issue concerning the coding space relies on the expression of proteins with multiple functions. Members of the family Potyviridae, the most abundant group of RNA viruses in plants, certainly offer several attractive examples of viral factors playing roles in diverse infection-related pathways. The Helper Component Proteinase (HCPro) is an essential and well-characterized multitasking protein for which three independent functions, at least, have been described: (i) viral plant-to-plant transmission, (ii) polyprotein maturation, (iii) RNA silencing suppression...
March 29, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28322011/fcrav2-a-gene-with-rogdi-domain-involved-in-fusarium-head-blight-and-crown-rot-on-durum-wheat-caused-by-fusarium-culmorum
#10
Francesca Spanu, Barbara Scherm, Irene Camboni, Virgilio Balmas, Giovanna Pani, Safa Oufensou, Nicolo' Macciotta, Matias Pasquali, Quirico Migheli
Fusarium culmorum is a soil-borne fungal pathogen able to cause foot and root rot and Fusarium head blight on small grain cereals, particularly on wheat and barley. It causes significant yield and quality loss and results in the contamination of kernels with type B trichothecene mycotoxins. Knowledge on pathogenicity factors of this fungus is still limited. A transposon tagging approach based on the mimp1/impala double component system has allowed us to select a mutant altered in multiple metabolic and morphological processes, trichothecene production and virulence...
March 21, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28296004/nitrogen-modulation-of-medicago-truncatula-resistance-to-aphanomyces-euteiches-depends-on-plant-genotype
#11
Elise Thalineau, Carine Fournier, Antoine Gravot, David Wendehenne, Sylvain Jeandroz, Hoai-Nam Truong
Nitrogen (N) availability can impact plant resistance to pathogens by regulating plant immunity. To better understand the links between N nutrition and plant defence, we analysed the impact of N availability on Medicago truncatula resistance to the root pathogen Aphanomyces euteiches. This oomycete is considered as the most limiting factor for legume production. Ten plant genotypes were tested in vitro for their resistance to A. euteiches in either complete or N-deficient medium. N-deficiency led to enhanced or reduced susceptibility depending on plant genotype...
March 15, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28295994/transcriptome-analysis-of-the-dickeya-dadantii-pecs-regulon-during-early-stages-of-interaction-with-arabidopsis-thaliana
#12
Jacques Pédron, Emilie Chapelle, Benoît Alunni, Frédérique Van Gijsegem
PecS is one of the major global regulators controlling virulence of Dickeya dadantii, a broad host range phytopathogenic bacterium causing soft rot on several plant families. To define the PecS regulon during plant colonisation, we analysed the global transcriptome profiles in wild type and pecS mutant strains during early colonization of the leaf surfaces and in leaf tissue just before the onset of symptoms and found that the PecS regulon consists of more than 600 genes. About one half of these genes are down-regulated in the pecS mutant, therefore PecS has both positive and negative regulatory roles that may be direct or indirect...
March 15, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28220688/the-dnaj-protein-osdja6-negatively-regulates-rice-innate-immunity-to-the-blast-fungus-magnaporthe-oryzae
#13
Xionghui Zhong, Jiuxia Yang, Yanlong Shi, Xuli Wang, Guo-Liang Wang
Rice blast, caused by Magnaporthe oryzae (synonym: Pyricularia oryzae), severely reduces rice production and grain quality. The molecular mechanism of rice resistance to M. oryzae is not fully understood. In this study, we identified a chaperone DnaJ protein, OsDjA6, which is involved in basal resistance to M. oryzae in rice. The OsDjA6 protein is distributed in the entire rice cell. The expression of OsDjA6 is significantly induced in rice after infection with a compatible isolate. Silencing of OsDjA6 in transgenic rice enhances resistance to M...
February 21, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28220595/guanosine-tetraphosphate-modulates-salicylic-acid-signaling-and-the-resistance-of-arabidopsis-thaliana-to-turnip-mosaic-virus
#14
Hela Abdelkefi, Matteo Sugliani, Ke Hang, Seddik Harchouni, Ludivine Soubigou-Taconnat, Sylvie Citerne, Gregory Mouille, Hatem Fakhfakh, Christophe Robaglia, Ben Field
Chloroplasts can act as key players in the perception and acclimation of plants to incoming environmental signals. A growing body of evidence indicates that chloroplasts play a critical role in plant immunity. Chloroplast function can be regulated by the nucleotides guanosine tetraphosphate and pentaphosphate ((p)ppGpp). In plants (p)ppGpp levels increase in response to abiotic stress and to plant hormones that are involved in abiotic and biotic stress signaling. Here we analyzed the transcriptome of Arabidopsis plants that over accumulate (p)ppGpp and unexpectedly found a decrease in the levels of a broad range of transcripts for plant defense and immunity...
February 21, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28220591/transcriptome-analysis-of-root-knot-nematode-meloidogyne-incognita-infected-tomato-solanum-lycopersicum-roots-reveals-complex-gene-expression-profiles-and-metabolic-networks-of-both-host-and-nematode-during-susceptible-and-resistance-responses
#15
Neha Shukla, Rachita Yadav, Pritam Kaur, Simon Rasmussen, Shailendra Goel, Manu Agarwal, Arun Jagannath, Ramneek Gupta, Amar Kumar
Root knot nematodes (RKNs, Meloidogyne incognita) are economically important endoparasites having a wide-host range. We have taken a comprehensive transcriptomic approach to investigate the expression of both tomato and RKN genes in tomato roots at five infection time intervals from susceptible plants and two infection time intervals from resistant plants, grown under soil conditions. Differentially expressed genes during susceptible (1827-tomato, 462-RKN) and resistance (25-tomato, 160-RKN) interactions were identified...
February 21, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28218463/closed-reference-metatranscriptomics-enables-in-planta-profiling-of-putative-virulence-activities-in-the-grapevine-trunk-disease-complex
#16
Abraham Morales-Cruz, Gabrielle Allenbeck, Rosa Figueroa-Balderas, Vanessa E Ashworth, Daniel P Lawrence, Renaud Travadon, Rhonda J Smith, Kendra Baumgartner, Philippe E Rolshausen, Dario Cantu
Grapevines, like other perennial crops, are affected by so-called 'trunk diseases', which damage the trunk and other woody tissues. Mature grapevines typically contract more than one trunk disease and often multiple grapevine trunk pathogens (GTPs) are recovered from infected tissues. The co-existence of different GTP species in complex and dynamic microbial communities complicates the study of the molecular mechanisms underlying disease development especially under vineyard conditions. The objective of this study was to develop and optimize a community-level transcriptomics (i...
February 20, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28218447/the-role-of-type-three-effectors-from-xanthomonas-axonopodis-pv-manihotis-in-virulence-and-suppression-of-plant-immunity
#17
Cesar Augusto Medina, Paola Andrea Reyes, Cesar Augusto Trujillo, Juan Luis Gonzalez, David Alejandro Bejarano, Nathaly Andrea Montenegro, Jonathan M Jacobs, Anna Joe, Silvia Restrepo, James R Alfano, Adriana Jimena Bernal
Xanthomonas axonopodis pv. manihotis (Xam) causes cassava bacterial blight, the most important bacterial disease of cassava. Xam, like other Xanthomonas species, requires type III effectors (T3Es) for maximal virulence. Xam strain CIO151 has 17 predicted T3Es belonging to the Xanthomonas outer protein class (Xop). This work aimed at characterizing nine Xop effectors present in Xam CIO151 for their role in virulence and modulation of plant immunity. Our findings demonstrate the importance of XopZ, XopX, XopAO1, and AvrBs2 for full virulence, as well as a redundant function in virulence between XopN and XopQ in susceptible cassava plants...
February 20, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28213905/a-ten-gene-containing-genomic-island-determines-flagellin-glycosylation-implication-for-its-regulatory-role-in-motility-and-virulence-of-xanthomonas-oryzae-pv-oryzae
#18
Chao Yu, Huamin Chen, Fang Tian, Fenghuan Yang, Xiaochen Yuan, Ching-Hong Yang, Chenyang He
Flagellin glycosylation plays crucial roles in flagellar assembly, motility and virulence in several pathogenic bacteria. However, little is known about the genetic determinants and biological functions of flagellin glycosylation in Xanthomonas oryzae pv. oryzae (Xoo), the causal pathogen of bacterial blight of rice. Here, the structure, regulation and functions of a ten-gene cluster gigX (glycosylation island genes of Xoo), which was embedded in a flagellar regulon were characterized. gigX1 through gigX10, encoded putative enzymes or proteins involved in glycan biosynthesis and transfer, including a nucleotide sugar transaminase, an acyl-carrier protein (ACP), a 3-oxoacyl-ACP synthase, a 3-oxoacyl-ACP reductase, a dehydrogenase, an acetyltransferase, a ring hydroxylating dioxygenase, a hypothetical protein, a methyltransferanse, and a glycosyltransferase, respectively...
February 18, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28142223/cryphonectria-parasitica-the-causal-agent-of-chestnut-blight-invasion-history-population-biology-and-disease-control
#19
Daniel Rigling, Simone Prospero
Chestnut blight, caused by Cryphonectria parasitica, is a devastating disease infecting American and European chestnut trees. The pathogen is native to East Asia and was spread to other continents via infected chestnut plants. This review summarizes the current state of research on this pathogen with a special emphasis on its interaction with a hyperparasitic mycovirus that acts as a biological control agent of chestnut blight. Taxonomy: Cryphonectria parasitica (Murr.) Barr. is a Sordariomycete (ascomycete) fungus in the family Cryphonetriaceae (Order Diaporthales)...
January 31, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28142220/glutamate-synthase-moglt1-mediated-glutamate-homeostasis-is-important-for-autophagy-virulence-and-conidiation-in-the-rice-blast-fungus
#20
Wei Zhou, Wei Shi, Xiao-Wen Xu, Zhi-Gang Li, Chang-Fa Yin, Jun-Bo Peng, Song Pan, Xiao-Lin Chen, Wen-Sheng Zhao, Yan Zhang, Jun Yang, You-Liang Peng
Glutamate homeostasis plays vital roles in central nitrogen metabolism and coordinates several key metabolic functions. However, its functions in fungal pathogenesis and development have not been well investigated. In this study, we identified and characterized a glutamate synthase gene MoGLT1 in the rice blast fungus Magnaporthe oryzae that was important to glutamate homeostasis. MoGLT1 was constitutively expressed but had the highest expression level in appressoria. Deletion of MoGLT1 resulted in significant reductions in conidiation and virulence...
January 31, 2017: Molecular Plant Pathology
journal
journal
35001
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"