Phytopathology®


Publications
80

Genomes of ‘Candidatus Liberibacter solanacearum’ Haplotype A from New Zealand and the United States Suggest Significant Genome Plasticity in the Species

Citation
Thompson et al. (2015). Phytopathology® 105 (7)
Names
“Liberibacter solanacearum”
Abstract
‘Candidatus Liberibacter solanacearum’ contains two solanaceous crop-infecting haplotypes, A and B. Two haplotype A draft genomes were assembled and compared with ZC1 (haplotype B), revealing inversion and relocation genomic rearrangements, numerous single-nucleotide polymorphisms, and differences in phage-related regions. Differences in prophage location and sequence were seen both within and between haplotype comparisons. OrthoMCL and BLAST analyses identified 46 putative coding sequences pre

Incidence of ‘Candidatus Liberibacter asiaticus’-Infected Plants Among Citrandarins as Rootstock and Scion Under Field Conditions

Citation
Boava et al. (2015). Phytopathology® 105 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB), caused by the bacterium ‘Candidatus Liberibacter’ spp., is currently one of the most serious diseases of citrus plants and has caused substantial economic losses. Thus far, there is no source of genetic resistance to HLB in the genus Citrus or its relatives. However, several studies have reported Poncirus trifoliata and some of its hybrids to be more tolerant to the disease. The main objective of this study was to report differences in the incidence of ‘Ca. L. asiaticus’ in

Effects of Potato-Psyllid-Vectored ‘Candidatus Liberibacter solanacearum’ Infection on Potato Leaf and Stem Physiology

Citation
Wallis et al. (2015). Phytopathology® 105 (2)
Names
“Liberibacter solanacearum”
Abstract
The bacterium ‘Candidatus Liberibacter solanacearum’ is associated with zebra chip disease (ZC), a threat to potato production in North America and New Zealand. It is vectored by potato psyllids. Previous studies observed that ‘Ca. L. solanacearum’ infection causes potato tubers to undergo ZC-symptom-associated shifts in physiology, such as increased levels of amino acids, sugars, and phenolics. However, little is known about how ‘Ca. L. solanacearum’ infections caused by psyllid vector feeding

Association of ‘Candidatus Liberibacter solanacearum’ with a Vegetative Disorder of Celery in Spain and Development of a Real-Time PCR Method for Its Detection

Citation
Teresani et al. (2014). Phytopathology® 104 (8)
Names
“Liberibacter solanacearum”
Abstract
A new symptomatology was observed in celery (Apium graveolens) in Villena, Spain in 2008. Symptomatology included an abnormal amount of shoots per plant and curled stems. These vegetative disorders were associated with ‘Candidatus Liberibacter solanacearum’ and not with phytoplasmas. Samples from plant sap were immobilized on membranes based on the spot procedure and tested using a newly developed real-time polymerase chain reaction assay to detect ‘Ca. L. solanacearum’. Then, a test kit was de

Temporal Progression of ‘Candidatus Liberibacter asiaticus’ Infection in Citrus and Acquisition Efficiency by Diaphorina citri

Citation
Coletta-Filho et al. (2014). Phytopathology® 104 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Over the last decade, the plant disease huanglongbing (HLB) has emerged as a primary threat to citrus production worldwide. HLB is associated with infection by phloem-limited bacteria (‘Candidatus Liberibacter’ spp.) that are transmitted by the Asian citrus psyllid, Diaphorina citri. Transmission efficiency varies with vector-related aspects (e.g., developmental stage and feeding periods) but there is no information on the effects of host–pathogen interactions. Here, acquisition efficiency of ‘

Similarities and Differences in Physiological Responses to ‘Candidatus Liberibacter solanacearum’ Infection Among Different Potato Cultivars

Citation
Wallis et al. (2014). Phytopathology® 104 (2)
Names
“Liberibacter solanacearum”
Abstract
Zebra chip disease (ZC), putatively caused by the fastidious bacterium ‘Candidatus Liberibacter solanacearum’, is a threat to potato growers worldwide. However, little is known about biochemical shifts in different potato genotypes in response to ‘Ca. L. solanacearum’ infection. To address this, ‘Red La Soda’, ‘Russet Norkotah’, and ‘FL 1867’ potato were infected with ‘Ca. L. solanacearum’ 4, 3, 2, and 1 weeks before harvest to observe variability in cultivar responses to ‘Ca. L. solanacearum’

Population Structures of ‘Candidatus Liberibacter asiaticus’ in Southern China

Citation
Ma et al. (2014). Phytopathology® 104 (2)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) is a highly detrimental citrus disease associated with ‘Candidatus Liberibacter asiaticus’, a nonculturable alpha-proteobacterium. Characterization of the bacterial populations is important for development of disease management strategies. In this study, the ‘Ca. L. asiaticus’ populations in eight provinces in southern China where HLB is endemic were analyzed based on tandem repeat number (TRN) variations in a previously characterized genomic locus CLIBASIA_01645. Of the 224

Viability of ‘Candidatus Liberibacter asiaticus’ Prolonged by Addition of Citrus Juice to Culture Medium

Citation
Parker et al. (2014). Phytopathology® 104 (1)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing, or citrus greening disease, is associated with infection by the phloem-limited bacterium ‘Candidatus Liberibacter asiaticus’. Infection with ‘Ca. L. asiaticus’ is incurable; therefore, knowledge regarding ‘Ca. L. asiaticus’ biology and pathogenesis is essential to develop a treatment. However, ‘Ca. L. asiaticus’ cannot currently be successfully cultured, limiting its study. To gain insight into the conditions conducive for growth of ‘Ca. L. asiaticus’ in vitro, ‘Ca. L. asiaticus’

Visualization of ‘Candidatus Liberibacter asiaticus’ Cells in the Vascular Bundle of Citrus Seed Coats with Fluorescence In Situ Hybridization and Transmission Electron Microscopy

Citation
Hilf et al. (2013). Phytopathology® 103 (6)
Names
Ca. Liberibacter asiaticus
Abstract
‘Candidatus Liberibacter asiaticus’ is the bacterium implicated as a causal agent of the economically damaging disease of citrus called huanglongbing (HLB). Vertical transmission of the organism through seed to the seedling has not been demonstrated. Previous studies using real-time polymerase chain reaction assays indicated abundant bacterial 16S rRNA sequences in seed coats of citrus seed but the presence of intact bacterial cells was not demonstrated. We used microscopy to verify that intact

Zebra Chip Disease and Potato Biochemistry: Tuber Physiological Changes in Response to ‘Candidatus Liberibacter solanacearum’ Infection Over Time

Citation
Rashed et al. (2013). Phytopathology® 103 (5)
Names
“Liberibacter solanacearum”
Abstract
Zebra chip disease, putatively caused by the bacterium ‘Candidatus Liberibacter solanacearum’, is of increasing concern to potato production in Mexico, the United States, and New Zealand. However, little is known about the etiology of this disease and changes that occur within host tubers that result in its symptoms. Previous studies found that increased levels of phenolics, amino acids, defense proteins, and carbohydrates in ‘Ca. L. solanacearum’-infected tubers are associated with symptoms of