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July 09
Homologs of Caenorhabditis elegans Chemosensory Genes Have Roles in Behavior and Chemotaxis in the Root-Knot Nematode Meloidogyne incognita

Shivakumara and colleagues use knowledge of C. elegans chemosensation to identify four genes in the parasitic nematode, Meloidogyne incognita, that are induced in infectious larvae and expressed in chemosensory neurons. Knockdown experiments show that these genes are required for chemotaxis towards root exudate and for infection of the plant host.

June 10
Heritable Phytohormone Profiles of Poplar Genotypes Vary in Resistance to a Galling Aphid

Body and colleagues characterize the relationship between the hormone profile of 5 susceptible and resistant ​Populus aungustifolia ​genotypes to a galling aphid, Pemphigus betae, demonstrating strong heritability and interaction of phytohormone profiles and resistance/susceptibility, suggesting that gall formation is likely due to a balance between hormone-drive defense and development signaling. 

May 23
A Feed-Forward Subnetwork Emerging from Integrated TOR- and cAMP/PKA-Signaling Architecture Reinforces Magnaporthe oryzae Appressorium Morphogenesis
​Network analysis by Sun and colleagues reveals anmpmi.2019.32.issue-5.cover.jpg intimate connection between nutrient-sensing and surface-sensing in Magnaporthe germ tube morphogenesis. Their results describe a collapsible subnetwork involving TOR and cPKA that modulates germ tube plasticity and adds to our understanding of understanding of cell cycle regulation, autophagy control and appressorial formation.
April 23
Magnaporthe oryzae Abp1, a MoArk1 Kinase-Interacting Actin Binding Protein, Links Actin Cytoskeleton Regulation to Growth, Endocytosis, and Pathogenesis

Lianwei Li and colleagues examine the fungal cell biology of Magnaporthe oryzae pathogenesis, demonstrating that Actin Binding Protein1 plays a central role, acting as a scaffold to physically connect actin patches with Actin Regulating Kinase1 and MoCAP1, thus linking actin assembly and endocytosis in a process essential to pathogenesis. 

March 25
Transcriptomic Analysis With the Progress of Symbiosis in ‘Crack-Entry’ Legume Arachis hypogaea Highlights Its Contrast With ‘Infection Thread’ Adapted Legumes

Karmarkar and colleagues present a careful, temporal analysis of the peanut nodule transcriptome. The highlight is the comparison of expression of known symbiotic genes in other legumes with those in Arachis. This important transcriptomic resource​ provides insight into the evolution of symbiotic nodule development and rhizobial infection via crack entry.

March 04
Postinvasive Bacterial Resistance Conferred by Open Stomata in Rice

The role of Abscisic Acid in plant immunity is complex, inducing defense against some pathogens and inducing resistance against others. In this article, Dandan Zhang and colleagues show that in rice, preventing Abscisic Acid from closing stomata increases resistance to Xanthomonas pathogens, likely by decreasing water availability in the leaf interior. The broad spectrum resistance they see suggests that leaf water status plays an important role in resistance to pathogens and may indicate future targets for disease management. 

Read more.​

November 17
Factors in Age-Related Resistance in Arabidopsis thaliana

Wilson and Colleagues​ explore the roles that salicylic acid and floral regulators play in disease resistance.

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