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| Open AccessNonpathogenic Pseudomonas syringae derivatives and its metabolites trigger the plant “cry for help” response to assemble disease suppressing and growth promoting rhizomicrobiome
Upon pathogen attack, plants can trigger the “cry for help” response and assemble beneficial rhizobacteria. Here, the authors use nonpathogenic Pseudomonas syringae DC3000 derivatives to elicit a similar “cry for help” response as the wild-type pathogenic DC3000 in Arabidopsis.
- Yunpeng Liu
- , Huihui Zhang
- & Ruifu Zhang
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Article
| Open AccessAttenuation of phytofungal pathogenicity of Ascomycota by autophagy modulators
Woo et al. report new autophagy inhibitors identified through a high-throughput chemical screening using a BRET-based assay and an ATG8 synthetic sensor, that function as safe and effective fungicides against broad fungal pathogens.
- Jongchan Woo
- , Seungmee Jung
- & Savithramma P. Dinesh-Kumar
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Article
| Open AccessPredatory protists reduce bacteria wilt disease incidence in tomato plants
Soil organisms are affected by the presence of predatory protists. Here, the authors predatory protists are negatively associated with bacteria wilt disease incidence in tomato plants and that fertilisation enhances the abundance of predatory protists
- Sai Guo
- , Zixuan Jiao
- & Stefan Geisen
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| Open AccessCommensal lifestyle regulated by a negative feedback loop between Arabidopsis ROS and the bacterial T2SS
The plant immune output reactive oxygen species tames a detrimental bacterial commensal from native microbiota by suppressing a bacterial secretion system, allowing the co-existence and turning it into a beneficial bacterium to the host.
- Frederickson Entila
- , Xiaowei Han
- & Kenichi Tsuda
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| Open AccessMagnaporthe oryzae effector MoSPAB1 directly activates rice Bsr-d1 expression to facilitate pathogenesis
Magnaporthe oryzae effector MoSPAB1 enters rice nuclei to bind to the promoter of the immunity-brake gene Bsr-d1 and activates its expression by competing with rice MYBS1, which constitute a conserved module that facilitates fungal pathogenesis.
- Ziwei Zhu
- , Jun Xiong
- & Weitao Li
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| Open AccessH3.1K27me1 loss confers Arabidopsis resistance to Geminivirus by sequestering DNA repair proteins onto host genome
Geminiviruses hijack the host DNA repairing proteins for their amplification. The authors report that Arabidopsis loses H3.1K27me1, a protector of genome stability, but gains resistance to geminivirus infection via retaining key factors like RAD51.
- Zhen Wang
- , Claudia M. Castillo-González
- & Xiuren Zhang
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Article
| Open AccessA global-temporal analysis on Phytophthora sojae resistance-gene efficacy
Rps genes are used to manage the major soybean pathogen Phytophthora sojae, which causes Phytophthora stem and root rot (PRR). Here, the authors show that widely used Rps genes are no longer effective for managing PRR in the United States, Canada and Argentina.
- Austin G. McCoy
- , Richard R. Belanger
- & Martin I. Chilvers
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| Open AccessPlant immunity suppression by an exo-β-1,3-glucanase and an elongation factor 1α of the rice blast fungus
Fungal cell walls release β-1,3-glucan fragments that trigger plant immunity. Here, the authors show that a glucanase (Ebg1) of the blast fungus Magnaporthe oryzae suppresses plant immunity by hydrolyzing β-1,3-glucan. At the same time, Ebg1 induces plant immune responses that are dampened by a fungal protein that interacts with Ebg1.
- Hang Liu
- , Xunli Lu
- & You-Liang Peng
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Article
| Open AccessDivergent sequences of tetraspanins enable plants to specifically recognize microbe-derived extracellular vesicles
Extracellular vesicles (EVs) are important in plant-microbe interactions. Here we show that the divergent sequences within tetraspanins localized at EV membranes enable plant innate immune system to distinguish between self and non-self EVs.
- Jinyi Zhu
- , Qian Qiao
- & Yuanchao Wang
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Article
| Open AccessPrecise in-field molecular diagnostics of crop diseases by smartphone-based mutation-resolved pathogenic RNA analysis
On-site crop disease diagnostics is critical for precise application of pesticides. Here, the authors report an in-field molecular diagnostic tool for wheat pathogens using a nucleic acid amplification-free, gene mutation-resolved and smartphone-integrated genetic assay.
- Ting Zhang
- , Qingdong Zeng
- & Ruijie Deng
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Article
| Open AccessA selective autophagy receptor VISP1 induces symptom recovery by targeting viral silencing suppressors
Symptom recovery is induced by a balanced “arms race” between viruses and plants. Here, the authors show that a small peptide mediates autophagic degradation of viral silencing suppressors to reach the balance of virus pathogenicity and plant immunity.
- Xin Tong
- , Jia-Jia Zhao
- & Xian-Bing Wang
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Article
| Open AccessA plant RNA virus inhibits NPR1 sumoylation and subverts NPR1-mediated plant immunity
Salicylic acid (SA) signaling pathway restricts the compatible infection of potyviruses. Here, Liu et al. show that potyviral NIb interacts with NPR1, the SA receptor in plants, preventing its sumoylation by SUMO3 and subsequent phosphorylation at Ser11/Ser15. This way, NPR1-mediated immunity is suppressed to promote virus infection.
- Jiahui Liu
- , Xiaoyun Wu
- & Xiaofei Cheng
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Article
| Open AccessImproving cassava bacterial blight resistance by editing the epigenome
Activating the expression of host susceptibility (S) genes is one of the strategies plant pathogens employed to promote infection of their host. Here, the authors show that targeted methylation at the TAL20 effector binding element of the cassava SWEET10a gene lead to resistance to Xanthomonas phaseoli.
- Kira M. Veley
- , Kiona Elliott
- & Rebecca S. Bart
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| Open AccessGenotyping-by-sequencing-based identification of Arabidopsis pattern recognition receptor RLP32 recognizing proteobacterial translation initiation factor IF1
Pattern-triggered immunity is activated by recognition of microbe-derived structures by host pattern recognition receptors. Here the authors use a genotype-by sequencing approach to show that bacterial translation initiation factor 1 triggers PTI in Arabidopsis thaliana after recognition by the RLP32 receptor.
- Li Fan
- , Katja Fröhlich
- & Thorsten Nürnberger
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| Open AccessGenome-resolved metagenomics reveals role of iron metabolism in drought-induced rhizosphere microbiome dynamics
Advances in omics provide a tool to understand mechanisms for plant–microbial interactions under stress. Here the authors apply genome-resolved metagenomics to investigate sorghum and its microbiome responses to drought, identifying an unexpected role of iron metabolism.
- Ling Xu
- , Zhaobin Dong
- & Devin Coleman-Derr
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Article
| Open AccessEpidermal chloroplasts are defense-related motile organelles equipped with plant immune components
Leaf epidermal cells contain small chloroplasts which likely contribute little to photosynthesis and whose function is unclear. Here the authors show that these chloroplasts move toward the leaf surface in response to invasion trials by non-adapted fungal pathogens and contribute to non-host resistance.
- Hiroki Irieda
- & Yoshitaka Takano
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Article
| Open AccessThe N-terminus of an Ustilaginoidea virens Ser-Thr-rich glycosylphosphatidylinositol-anchored protein elicits plant immunity as a MAMP
Ustilaginoidea virens is a fungal pathogen that infects rice via the panicles. Here, the authors show that U. virens SGP1, a conserved Ser-Thr-rich glycosyl-phosphatidyl-inositol-anchored protein, elicits immune responses in rice leaves while contributing to virulence in panicles.
- Tianqiao Song
- , You Zhang
- & Yongfeng Liu
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Article
| Open AccessGlycerol-3-phosphate mediates rhizobia-induced systemic signaling in soybean
Movement of glycerol-3-phosphate (G3P) promotes systemic resistance following local pathogen infections. Here the authors show that rootward movement of shoot-synthesized G3P occurs in response to root-recognition of incompatible rhizobia and promotes exclusion of non-desirable bacteria in roots.
- M. B. Shine
- , Qing-ming Gao
- & Aardra Kachroo
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| Open AccessLipopolysaccharide O-antigen delays plant innate immune recognition of Xylella fastidiosa
Many pathogenic bacteria have evolved to subvert host immune responses triggered by lipopolysaccharides (LPS). Here the authors show that a long terminal polysaccharide chain, known as the O-antigen, present in LPS from the plant pathogen Xylella fastidiosa can delay recognition by grapevine hosts.
- Jeannette N. Rapicavoli
- , Barbara Blanco-Ulate
- & M. Caroline Roper
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| Open AccessStructural characterization of antibiotic self-immunity tRNA synthetase in plant tumour biocontrol agent
The bacterium Agrobacterium radiobacter K84 secretes an antibiotic that is transported into the plant pathogen A. tumefaciensand processed into the toxin TM84. Here, the authors identify a mechanism whereby the antibiotic-producing microbe resists its own toxin.
- Shaileja Chopra
- , Andrés Palencia
- & John Reader