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Diversity of “Candidatus Liberibacter asiaticus” strains in Texas revealed by prophage sequence analyses

Citation
De Leon et al. (2024). Plant Disease
Names
Ca. Liberibacter asiaticus
Abstract
Prophages/phages are important components of the genome of ‘Candidatus Liberibacter asiaticus’ (CLas), an unculturable alphaproteobacterium associated with citrus Huanglongbing (HLB) disease. Phage variations have significant contributions to CLas strain diversity research, which provide critical information for HLB management. In this study, prophage variations among selected CLas strains from southern Texas were studied. The CLas strains were collected from three different CLas inhabitant env

FlgI Is a Sec-Dependent Effector of Candidatus Liberibacter asiaticus That Can Be Blocked by Small Molecules Identified Using a Yeast Screen

Citation
Zuo et al. (2024). Plants 13 (2)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) is one of the most devastating diseases of citrus worldwide. The phloem-restricted bacterium Candidatus Liberibacter asiaticus (CLas) is considered to be the main pathogen responsible for HLB. There is currently no effective practical strategy for the control of HLB. Our understanding of how pathogens cause HLB is limited because CLas has not been artificially cultured. In this study, 15 potential virulence factors were predicted from the proteome of CLas through DeepVF and P

Candidatus Siderophilus nitratireducens”: a putative nap-dependent nitrate-reducing iron oxidizer within the new order Siderophiliales

Citation
Corbera-Rubio et al. (2024). ISME Communications
Names
Ca. Siderophilus nitratireducens
Abstract
Abstract Nitrate leaching from agricultural soils is increasingly found in groundwater, a primary source of drinking water worldwide. This nitrate influx can potentially stimulate the biological oxidation of iron in anoxic groundwater reservoirs. Nitrate-dependent iron-oxidizing (NDFO) bacteria have been extensively studied in laboratory settings, yet their ecophysiology in natural environments remains largely unknown. To this end, we established a pilot-scale filter on nitrate-ri

Occurrence of ‘Candidatus Phytoplasma asteris’-Related Strains infecting Chinaberry (Melia azedarach) Showing Chlorotic Leaf Symptoms on Hainan Island of China

Citation
Yu et al. (2024). Plant Disease
Names
Ca. Phytoplasma asteris
Abstract
Chinaberry (Melia azedarach), belonging to the family of Meliaceae, is an ornamental tree distributes across southern of China. In the autumn of 2021, In an area of 400 acres located in Wanning city of Hainan Province, a tropical island in China, with coordinates of 110°28′42.72″E, 19°2′9.96″N, about 20 % (100) of the chinaberry trees showed disease symptoms included chlorotic leaves. The disease symptoms were consistent with infections by a phloem-limited prokaryotic pathogen phytoplasma. The

Sub-optimal temperatures lead to altered expression of stress-related genes and increased ‘Candidatus Liberibacter solanacearum’ accumulation in potato psyllid

Citation
Fisher et al. (2024). Frontiers in Insect Science 3
Names
“Liberibacter solanacearum”
Abstract
IntroductionThe potato psyllid Bactericera cockerelli is the insect vector of the fastidious bacterium ‘Candidatus Liberibacter solanacearum’. The bacterium infects both B. cockerelli and plant species, causing zebra chip (ZC) disease of potato and vein-greening disease of tomato. Temperatures are known to influence the initiation and progression of disease symptom in the host plant, and seasonal transitions from moderate to high temperatures trigger psyllid dispersal migration to facilitate sur

Improving the Comprehension of Pathogenicity and Phylogeny in ‘Candidatus Phytoplasma meliae’ through Genome Characterization

Citation
Fernández et al. (2024). Microorganisms 12 (1)
Names
Ca. Phytoplasma meliae
Abstract
‘Candidatus Phytoplasma meliae’ is a pathogen associated with chinaberry yellowing disease, which has become a major phytosanitary problem for chinaberry forestry production in Argentina. Despite its economic impact, no genome information of this phytoplasma has been published, which has hindered its characterization at the genomic level. In this study, we used a metagenomics approach to analyze the draft genome of the ‘Ca. P. meliae’ strain ChTYXIII. The draft assembly consisted of twenty-one c

Towards the completion of Koch’s postulates for the citrus huanglongbing bacterium, Candidatus Liberibacter asiaticus

Citation
Zheng et al. (2024). Horticulture Research
Names
Ca. Liberibacter asiaticus
Abstract
Abstract Candidatus Liberibacter asiaticus (Las) is one of the causal agents of huanglongbing (HLB), the most devastating disease of citrus worldwide. Due to the intracellular lifestyle and significant genome reduction, culturing Las in vitro has proven to be extremely challenging. In this study, we optimized growth conditions and developed a semi-selective medium based on the results of nutritional and antibiotic screening assays. Using these optimized conditions, we were able to

'Candidatus Phytoplasma mali' SAP11-Like protein modulates expression of genes involved in metabolic pathways, photosynthesis, and defense in Nicotiana occidentalis leaves

Citation
Mittelberger et al. (2024).
Names
Ca. Phytoplasma mali
Abstract
Abstract Background: 'Candidatus Phytoplasma mali', the causal agent of apple proliferation disease, exerts influence on its host plant through various effector proteins, including SAP11CaPm which interacts with different TCP transcription factors. This study examines the transcriptional response of the plant upon early expression of SAP11CaPm. For that purpose, leaves of Nicotiana occidentalis H.-M. Wheeler were Agrobacterium-infiltrated to induce transient expression of SAP11CaPm and c

Members of the class Candidatus Ordosarchaeia imply an alternative evolutionary scenario from methanogens to haloarchaea

Citation
Zhao et al. (2024). The ISME Journal 18 (1)
Names
Ca. Ordosarchaeia Ca. Hikarchaeia
Abstract
Abstract The origin of methanogenesis can be traced to the common ancestor of non-DPANN archaea, whereas haloarchaea (or Halobacteria) are believed to have evolved from a methanogenic ancestor through multiple evolutionary events. However, due to the accelerated evolution and compositional bias of proteins adapting to hypersaline habitats, Halobacteria exhibit substantial evolutionary divergence from methanogens, and the identification of the closest methanogen (either Methanonatr