Search results
15


Candidatus Liberibacter asiaticus’-Encoded BCP Peroxiredoxin Suppresses Lipopolysaccharide-Mediated Defense Signaling and Nitrosative Stress In Planta

Citation
Jain et al. (2022). Molecular Plant-Microbe Interactions® 35 (3)
Names
Ca. Liberibacter asiaticus Liberibacter
Abstract
The lipopolysaccharides (LPS) of gram-negative bacteria trigger a nitrosative and oxidative burst in both animals and plants during pathogen invasion. Liberibacter crescens strain BT-1 is a surrogate for functional genomic studies of the uncultured pathogenic ‘Candidatus Liberibacter’ spp. that are associated with severe diseases such as citrus greening and potato zebra chip. Structural determination of L. crescens LPS revealed the presence of a very long chain fatty acid modification. L. cresc

Not Just a Cycle: Three gab Genes Enable the Non-Cyclic Flux Toward Succinate via GABA Shunt in ‘Candidatus Liberibacter asiaticus’–Infected Citrus

Citation
Nehela, Killiny (2022). Molecular Plant-Microbe Interactions® 35 (3)
Names
Ca. Liberibacter asiaticus
Abstract
Although the mitochondria retain all required enzymes for an intact tricarboxylic acid (TCA) cycle, plants might shift the cyclic flux from the TCA cycle to an alternative noncyclic pathway via γ-aminobutyric acid (GABA) shunt under specific physiological conditions. We hypothesize that several genes may ease this noncyclic flux and contribute to the citrus response to the phytopathogenic bacterium ‘Candidatus Liberibacter asiaticus’, the causal agent of Huanglongbing in citrus. To test this hy

Dual Transcriptional Profiling of Carrot and ‘Candidatus Liberibacter solanacearum’ at Different Stages of Infection Suggests Complex Host-Pathogen Interaction

Citation
Wang et al. (2021). Molecular Plant-Microbe Interactions® 34 (11)
Names
“Liberibacter solanacearum”
Abstract
The interactions between the phloem-limited pathogen ‘Candidatus Liberibacter solanacearum’ haplotype C and carrot (Daucus carota subsp. sativus) were studied at 4, 5, and 9 weeks postinoculation (wpi), by combining dual RNA-Seq results with data on bacterial colonization and observations of the plant phenotype. In the infected plants, genes involved in jasmonate biosynthesis, salicylate signaling, pathogen-associated molecular pattern- and effector-triggered immunity, and production of pathoge

Sec-Delivered Effector 1 (SDE1) of ‘Candidatus Liberibacter asiaticus’ Promotes Citrus Huanglongbing

Citation
Clark et al. (2020). Molecular Plant-Microbe Interactions® 33 (12)
Names
Ca. Liberibacter asiaticus
Abstract
Sec-delivered effector 1 (SDE1) from the huanglongbing (HLB)-associated bacterium ‘Candidatus Liberibacter asiaticus’ was previously characterized as an inhibitor of defense-related, papain-like cysteine proteases in vitro and in planta. Here, we investigated the contributions of SDE1 to HLB progression. We found that SDE1 expression in the model plant Arabidopsis thaliana caused severe yellowing in mature leaves, reminiscent of both ‘Ca. L. asiaticus’ infection symptoms and accelerated leaf se

Comparative Genomics Screen Identifies Microbe-Associated Molecular Patterns from ‘Candidatus Liberibacter’ spp. That Elicit Immune Responses in Plants

Citation
Chen et al. (2020). Molecular Plant-Microbe Interactions® 33 (3)
Names
Liberibacter
Abstract
Citrus huanglongbing (HLB), caused by phloem-limited ‘Candidatus Liberibacter’ bacteria, is a destructive disease threatening the worldwide citrus industry. The mechanisms of pathogenesis are poorly understood and no efficient strategy is available to control HLB. Here, we used a comparative genomics screen to identify candidate microbe-associated molecular patterns (MAMPs) from ‘Ca. Liberibacter’ spp. We identified the core genome from multiple ‘Ca. Liberibacter’ pathogens, and searched for co

‘Candidatus Phytoplasma mali’ Genome Encodes a Protein that Functions as an E3 Ubiquitin Ligase and Could Inhibit Plant Basal Defense

Citation
Strohmayer et al. (2019). Molecular Plant-Microbe Interactions® 32 (11)
Names
Ca. Phytoplasma mali
Abstract
Phytoplasmas are the causative agent of numerous diseases of plant species all over the world, including important food crops. The mode by which phytoplasmas multiply and behave in their host is poorly understood and often based on genomic data. We used yeast two-hybrid screening to find new protein–protein interactions between the causal agent of apple proliferation ‘Candidatus Phytoplasma mali’ and its host plant. Here, we report that the ‘Ca. P. mali’ strain PM19 genome encodes a protein PM1

The Tad Pilus Apparatus of ‘Candidatus Liberibacter asiaticus’ and Its Regulation by VisNR

Citation
Andrade et al. (2019). Molecular Plant-Microbe Interactions® 32 (9)
Names
Ca. Liberibacter asiaticus
Abstract
Citrus huanglongbing (HLB) is one of the most destructive diseases affecting citrus plants. ‘Candidatus Liberibacter asiaticus’, an uncultivated α-proteobacteria, is the most widely spread causal agent of HLB and is transmitted by the Asian citrus psyllid Diaphorina citri. ‘Ca. L. asiaticus’ attachment to the psyllid midgut is believed to be critical to further infect other organs, including the salivary gland. In this study, the type IVc tight adherence (Tad) pilus locus encoded by ‘Ca. L. asi

‘Candidatus Liberibacter asiaticus’ and Its Vector, Diaphorina citri, Augment the Tricarboxylic Acid Cycle of Their Host via the γ-Aminobutyric Acid Shunt and Polyamines Pathway

Citation
Nehela, Killiny (2019). Molecular Plant-Microbe Interactions® 32 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB), a destructive citrus disease, is associated with ‘Candidatus Liberibacter asiaticus’, which is transmitted by the Asian citrus psyllid Diaphorina citri. Both ‘Ca. L. asiaticus’ and its vector manipulate the host metabolism for their benefit, to meet their nutritional needs and neutralize the host defense responses. We used a targeted gas chromatography-mass spectrometry–based method to explore the connection between the tricarboxylic acid (TCA) cycle, γ-aminobutyric acid (G

A Secreted ‘Candidatus Liberibacter asiaticus’ Peroxiredoxin Simultaneously Suppresses Both Localized and Systemic Innate Immune Responses In Planta

Citation
Jain et al. (2018). Molecular Plant-Microbe Interactions® 31 (12)
Names
Ca. Liberibacter asiaticus
Abstract
The oxidative (H2O2) burst is a seminal feature of the basal plant defense response to attempted pathogen invasions. In ‘Candidatus Liberibacter asiaticus’ UF506, expression of the SC2 prophage-encoded secreted peroxidase (F489_gp15) increases bacterial fitness and delays symptom progression in citrus. Two chromosomal 1-Cys peroxiredoxin genes, CLIBASIA_RS00940 (Lasprx5) and CLIBASIA_RS00445 (Lasbcp), are conserved among all sequenced ‘Ca. L. asiaticus’ strains, including those lacking prophage

Identification of Gene Candidates Associated with Huanglongbing Tolerance, Using ‘Candidatus Liberibacter asiaticus’ Flagellin 22 as a Proxy to Challenge Citrus

Citation
Shi et al. (2018). Molecular Plant-Microbe Interactions® 31 (2)
Names
Ca. Liberibacter asiaticus
Abstract
The 22–amino acid (flg22) pathogen-associated molecular pattern from the flagellin of Xanthomonas citri subsp. citri has been shown to induce defense responses correlated with citrus canker resistance. Here, flg22 of ‘Candidatus Liberibacter asiaticus’, the putative causal agent of Huanglongbing (HLB), elicited differential defense responses that were weaker than those from Xcc-flg22, between those of the HLB-tolerant mandarin cultivar Sun Chu Sha and susceptible grapefruit cultivar Duncan. Tra