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The Arabidopsis Lectin Receptor Kinase LecRK-V.5 Represses Stomatal Immunity Induced by Pseudomonas syringae pv. tomato DC3000

The Arabidopsis Lectin Receptor Kinase LecRK-V.5 Represses Stomatal Immunity Induced by Pseudomonas syringae pv. tomato DC3000 | Plant Immunity And Microbial Effectors | Scoop.it
by Marie Desclos-Theveniau, Dominique Arnaud, Ting-Yu Huang, Grace Jui-Chih Lin, Wei-Yen Chen, Yi-Chia Lin, Laurent Zimmerli Stomata play an important role in plant innate immunity by limiting pathogen entry into leaves but molecular...
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Plant Immunity And Microbial Effectors
Dedicated to the research done on the molecular dialogue between plants and pathogens (but also to any interesting report)
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Gene silencing and gene expression in phytopathogenic fungi using a plant virus vector

RNAi is used to elucidate gene functions also in phytopathogenic fungi, where it is expressed by hairpin RNAs delivered through plasmids, sequences integrated in fungal or plant genomes, or by RNAi generated in planta by a plant virus infection. These approaches have drawbacks ranging from instability of hairpin constructs to difficulties in preparing and handling transgenic plants to silence homologous sequences in fungi grown on these plants. Here we show that RNAi can be expressed in phytopathogenic fungi by direct transfection with a plant virus-based vector and that the approach also can be used to obtain foreign protein expression in fungi. This technique could find wider application for functional genomics in filamentous fungi of biomedical and phytopathological interest.

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Identification of Sources of Quantitative Resistance to Fusarium oxysporum f. sp. medicaginis in Medicago truncatula

Identification of Sources of Quantitative Resistance to Fusarium oxysporum f. sp. medicaginis in Medicago truncatula | Plant Immunity And Microbial Effectors | Scoop.it
Plant Disease, Volume 98, Issue 5, Page 667-673, May 2014.
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Host-to-Pathogen Gene Transfer Facilitated Infection of Insects by a Pathogenic Fungus

Host-to-Pathogen Gene Transfer Facilitated Infection of Insects by a Pathogenic Fungus | Plant Immunity And Microbial Effectors | Scoop.it
by Hong Zhao, Chuan Xu, Hsiao-Ling Lu, Xiaoxuan Chen, Raymond J. St. Leger, Weiguo Fang
Metarhizium robertsii is a plant root colonizing fungus that is also an insect pathogen.
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Bacteria Turn Plants and Insects into Zombies

A parasitic phytoplasma deploys proteins to manipulate the plants it infects as well as the insects that spread the microbe
-- Read more on ScientificAmerican.com
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Heteroconium chaetospira Induces Resistance to Clubroot via Upregulation of Host Genes Involved in Jasmonic Acid, Ethylene, and Auxin Biosynthesis

Heteroconium chaetospira Induces Resistance to Clubroot via Upregulation of Host Genes Involved in Jasmonic Acid, Ethylene, and Auxin Biosynthesis | Plant Immunity And Microbial Effectors | Scoop.it
by Rachid Lahlali, Linda McGregor, Tao Song, Bruce D. Gossen, Kazuhiko Narisawa, Gary Peng
An endophytic fungus, Heteroconium chaetospira isolate BC2HB1 (Hc), suppressed clubroot (Plasmodiophora brassicae -Pb) on canola in growth-cabinet trials.
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Microbial Pathogens Trigger Host DNA Double-Strand Breaks Whose Abundance Is Reduced by Plant Defense Responses

Microbial Pathogens Trigger Host DNA Double-Strand Breaks Whose Abundance Is Reduced by Plant Defense Responses | Plant Immunity And Microbial Effectors | Scoop.it
by Junqi Song, Andrew F. Bent
Immune responses and DNA damage repair are two fundamental processes that have been characterized extensively, but the links between them remain largely unknown.
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Complete Genome Sequence of the Biocontrol Strain Pseudomonas protegens Cab57 Discovered in Japan Reveals Strain-Specific Diversity of This Species

Complete Genome Sequence of the Biocontrol Strain Pseudomonas protegens Cab57 Discovered in Japan Reveals Strain-Specific Diversity of This Species | Plant Immunity And Microbial Effectors | Scoop.it
by Kasumi Takeuchi, Naomi Noda, Nobutaka Someya
The biocontrol strain Pseudomonas sp. Cab57 was isolated from the rhizosphere of shepherd’s purse growing in a field in Hokkaido by screening the antibiotic producers.
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Plant peptides in defense and signaling

Plant peptides in defense and signaling | Plant Immunity And Microbial Effectors | Scoop.it

This review focuses on plant peptides involved in defense against pathogen infection and those involved in the regulation of growth and development. Defense peptides, defensins, cyclotides and anti-microbial peptides are compared and contrasted. Signaling peptides are classified according to their major sites of activity. Finally, a network approach to creating an interactomic peptide map is described.


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Actinorhizal root nodule symbioses: what is signalling telling on the origins of nodulation?

Publication date: August 2014 Source:Current Opinion in Plant Biology, Volume 20 Author(s): Sergio Svistoonoff , Valérie Hocher , Hassen Gherbi Two groups of bacteria are able to induce the formation of nitrogen-fixing nodules:...
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Synthetic biology approaches to engineering the nitrogen symbiosis in cereals

Synthetic biology approaches to engineering the nitrogen symbiosis in cereals | Plant Immunity And Microbial Effectors | Scoop.it
Nitrogen is abundant in the earth’s atmosphere but, unlike carbon, cannot be directly assimilated by plants.
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Modeling 3D Facial Shape from DNA

Modeling 3D Facial Shape from DNA | Plant Immunity And Microbial Effectors | Scoop.it

Human facial diversity is substantial, complex, and largely scientifically unexplained. We used spatially dense quasi-landmarks to measure face shape in population samples with mixed West African and European ancestry from three locations (United States, Brazil, and Cape Verde). Using bootstrapped response-based imputation modeling (BRIM), we uncover the relationships between facial variation and the effects of sex, genomic ancestry, and a subset of craniofacial candidate genes. The facial effects of these variables are summarized as response-based imputed predictor (RIP) variables, which are validated using self-reported sex, genomic ancestry, and observer-based facial ratings (femininity and proportional ancestry) and judgments (sex and population group). By jointly modeling sex, genomic ancestry, and genotype, the independent effects of particular alleles on facial features can be uncovered. Results on a set of 20 genes showing significant effects on facial features provide support for this approach as a novel means to identify genes affecting normal-range facial features and for approximating the appearance of a face from genetic markers.

 

IPM Lab's insight:

Nothing to do with plant microbe interactions, but it's a nice piece of work!

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Plasmodium falciparum Erythrocyte Invasion: Combining Function with Immune Evasion

Plasmodium falciparum Erythrocyte Invasion: Combining Function with Immune Evasion | Plant Immunity And Microbial Effectors | Scoop.it
by Gavin J. Wright, Julian C. Rayner
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Identification of a new export signal in Plasmodium Yoelii: identification of a new exportome

Identification of a new export signal in Plasmodium Yoelii: identification of a new exportome | Plant Immunity And Microbial Effectors | Scoop.it
Summary
Development of the erythrocytic malaria parasite requires targeting of parasite proteins into multiple compartments located within and beyond the parasite confine.
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Virulence of the maize smut Ustilago maydis is shaped by organ-specific effectors

Virulence of the maize smut Ustilago maydis is shaped by organ-specific effectors | Plant Immunity And Microbial Effectors | Scoop.it
Summary
With the exception of Ustilago maydis, smut fungi infecting monocotyledonous hosts systemically colonize infected plants and cause symptoms exclusively in the inflorescences.
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Efficient Genome-Wide Detection and Cataloging of EMS-Induced Mutations Using Exome Capture and Next-Generation Sequencing

The authors combined high-throughput global sequencing targeted to genes and custom-designed bioinformatics tools to catalog and characterize chemically induced mutations in rice and wheat.
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Rapid determination of leaf area and plant height by using light curtain arrays in four species with contrasting shoot architecture

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Light curtain arrays (LC), a recently introduced phenotyping method, yield a binary data matrix from which a shoot silhouette is reconstructed.
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Phytoplasma Effector SAP54 Hijacks Plant Reproduction by Degrading MADS-box Proteins and Promotes Insect Colonization in a RAD23-Dependent Manner

Phytoplasma Effector SAP54 Hijacks Plant Reproduction by Degrading MADS-box Proteins and Promotes Insect Colonization in a RAD23-Dependent Manner | Plant Immunity And Microbial Effectors | Scoop.it
by Allyson M. MacLean, Zigmunds Orlovskis, Krissana Kowitwanich, Anna M. Zdziarska, Gerco C. Angenent, Richard G. H. Immink, Saskia A.
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A miR169 isoform regulates specific NF-YA targets and root architecture in Arabidopsis - Sorin - 2014 - New Phytologist - Wiley Online Library

A miR169 isoform regulates specific NF-YA targets and root architecture in Arabidopsis - Sorin - 2014 - New Phytologist - Wiley Online Library | Plant Immunity And Microbial Effectors | Scoop.it
In plants, roots are essential for water and nutrient acquisition. MicroRNAs (miRNAs) regulate their target mRNAs by transcript cleavage and/or inhibition of protein translation and are known as major post-transcriptional regulators of various developmental pathways and stress responses. In Arabidopsis thaliana, four isoforms of miR169 are encoded by 14 different genes and target diverse mRNAs, encoding subunits A of the NF-Y transcription factor complex. These miRNA isoforms and their targets have previously been linked to nutrient signalling in plants.By using mimicry constructs against different isoforms of miR169 and miR-resistant versions of NF-YA genes we analysed the role of specific miR169 isoforms in root growth and branching.We identified a regulatory node involving the particular miR169defg isoform and NF-YA2 and NF-YA10 genes that acts in the control of primary root growth. The specific expression of MIM169defg constructs altered specific cell type numbers and dimensions in the root meristem. Preventing miR169defg-regulation of NF-YA2 indirectly affected laterial root initiation. We also showed that the miR169defg isoform affects NF-YA2 transcripts both at mRNA stability and translation levels.We propose that a specific miR169 isoform and the NF-YA2 target control root architecture in Arabidopsis.
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Agronutrition et le LCA, partenaires de recherche pour mieux nourrir la planète

Agronutrition et le LCA, partenaires de recherche pour mieux nourrir la planète | Plant Immunity And Microbial Effectors | Scoop.it

 

 

 

Agronutrition, le leader français de la  nutrition alternative des plantes et le Laboratoire de Chimie Agro industrielle LCA viennent d’être sélectionnés par l’Agence Nationale de la Recherche (ANR) dans le cadre de l’appel à projet Lab Com.

.La collaboration de l’entreprise et du laboratoire toulousain, déjà à l’œuvre depuis 2010, va ainsi pouvoir être étendue, notamment en doublant les effectifs de recherche. Une équipe commune de 20 chercheurs mènera durant les cinq prochaines années des travaux en matière de biofertilisation, avec  des  tests  à  l’échelle  planétaire.

 


Via Isabelle Pélissié
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Défense des plantes : les exsudats racinaires, un arsenal caché | Vegenov

Défense des plantes : les exsudats racinaires, un arsenal caché | Vegenov | Plant Immunity And Microbial Effectors | Scoop.it

Ancrage dans le sol et nutrition sont loin d’être les seules fonctions des racines ! Longtemps ignorés, les mécanismes de défense mis en place par ces organes, notamment au niveau de la coiffe, suscitent depuis une dizaine d’années de nombreuses études. Des chercheurs de l’Université de Zurich ont fait le point sur les avancées dans ce domaine (Baetz U. et Martinoia E. (2013)). Revenons sur ce qu’ils présentent.


Via Isabelle Pélissié
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Evolutionary Dynamics of Nitrogen Fixation in the Legume–Rhizobia Symbiosis

Evolutionary Dynamics of Nitrogen Fixation in the Legume–Rhizobia Symbiosis | Plant Immunity And Microbial Effectors | Scoop.it
by Hironori Fujita, Seishiro Aoki, Masayoshi Kawaguchi
The stabilization of host–symbiont mutualism against the emergence of parasitic individuals is pivotal to the evolution of cooperation.
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Fungal and oomycete parasites of Chironomidae, Ceratopogonidae and Simuliidae (Culicomorpha, Diptera)

Publication date: Available online 31 March 2014
Source:Fungal Biology Reviews
Author(s): José I. de Souza , Frank H. Gleason , Minshad A. Ansari , Claudia C. López Lastra , Juan J. Garcia , Carmen L.A.
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Rescooped by IPM Lab from Agriculture nouvelle : l'atelier des curieux de l'agriculture.
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Pourquoi inoculer des micro-organismes en agriculture ?

Le triptyque de la biodisponibilité - Sol, micro-organismes, plantes. Pourquoi inoculer des micro-organismes en agriculture ? Pour : - la croissance - la nu...

Via Agriculture Nouvelle
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Jean-Michel Ané's curator insight, March 29, 8:52 AM

An interesting set of slides (in French) on the role of beneficial microbes in agriculture.

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The Reference Genome Sequence of Saccharomyces cerevisiae: Then and Now

The genome of the budding yeast Saccharomyces cerevisiae was the first completely sequenced from a eukaryote. It was released in 1996 as the work of a worldwide effort of hundreds of researchers.
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N-Glycosylation of Effector Proteins by an {alpha}-1,3-Mannosyltransferase Is Required for the Rice Blast Fungus to Evade Host Innate Immunity

This work identifies an α-1,3-mannosyltransferase that mediates the N-glycosylation of effector proteins in the rice blast fungus.
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