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New Assays for Rapid Detection of Beet Leafhopper-Associated Plant Pathogens, ‘Candidatus Phytoplasma trifolii’, Beet Curly Top Virus, and Spiroplasma citri

Citation
Swisher Grimm et al. (2023). Plant Disease 107 (12)
Names
Ca. Phytoplasma trifolii
Abstract
The beet leafhopper Circulifer tenellus is an important pest of agricultural crops in the United States, where it transmits beet curly top virus, beet leafhopper-transmitted virescence agent phytoplasma, and Spiroplasma citri to numerous crops, affecting yield and quality. Each of these pathogens have been linked to serious disease outbreaks within Washington State in the past century. To mitigate the risk of disease, growers target the beet leafhopper in their insect pest management programs.

The protein interactome of the citrus Huanglongbing pathogen Candidatus Liberibacter asiaticus

Citation
Carter et al. (2023). Nature Communications 14 (1)
Names
Ca. Liberibacter asiaticus
Abstract
AbstractThe bacterium Candidatus Liberibacter asiaticus (CLas) causes citrus Huanglongbing disease. Our understanding of the pathogenicity and biology of this microorganism remains limited because CLas has not yet been cultivated in artificial media. Its genome is relatively small and encodes approximately 1136 proteins, of which 415 have unknown functions. Here, we use a high-throughput yeast-two-hybrid (Y2H) screen to identify interactions between CLas proteins, thus providing insights into th

Multi-Locus Sequence Analysis Reveals the Genetic Diversity and Population Differentiation of Candidatus Liberibacter Asiaticus in China

Citation
You et al. (2023). Diversity 15 (12)
Names
Ca. Liberibacter asiaticus Liberibacter
Abstract
Huanglongbing (HLB) is a devastating citrus disease caused by Candidatus Liberibacter asiaticus (CLas). Since its initial outbreak in Guangdong Province, China, it has spread to 10 provinces and caused significant economic losses. Hence, assessing CLas genetic diversity and demographic history is crucial for HLB epidemic prevention and control. In this study, we collected 500 leaf samples of CLas-infected plants from 10 provinces. We performed multi-loci sequence analysis on four gene fragments

Asgard archaea modulate potential methanogenesis substrates in wetland soil

Citation
Valentin-Alvarado et al. (2023).
Names
“Atabeyarchaeia”
Abstract
AbstractThe roles of Asgard archaea in eukaryogenesis and marine biogeochemical cycles are well studied, yet their contributions in soil ecosystems are unknown. Of particular interest are Asgard archaeal contributions to methane cycling in wetland soils. To investigate this, we reconstructed two complete genomes for soil-associated Atabeyarchaeia, a new Asgard lineage, and the first complete genome of Freyarchaeia, and defined their metabolismin situ. Metatranscriptomics highlights high expressi

Refinement of the “CandidatusAccumulibacter” Genus Based on a Metagenomic Analysis of Biological Nutrient Removal (BNR) Pilot-Scale Plants Operated with Reduced Aeration

Citation
Stewart et al. (2023).
Names
Ca. Accumulibacter jenkinsii “Accumulibacter”
Abstract
ABSTRACTMembers of the “CandidatusAccumulibacter” genus are widely studied as key polyphosphate-accumulating organisms (PAOs) in biological nutrient removal (BNR) facilities performing enhanced biological phosphorus removal (EBPR). This diverse lineage includes 18 “Ca. Accumulibacter” species, which have been proposed based on the phylogenetic divergence of the polyphosphate kinase 1 (ppk1) gene and genome-scale comparisons of metagenome-assembled genomes (MAGs). Phylogenetic classification base

Differential expression of core metabolic functions inCandidatusAltiarchaeum inhabiting distinct subsurface ecosystems

Citation
Esser et al. (2023).
Names
Ca. Huberiarchaeum crystalense Ca. Altiarchaeum crystalense Ca. Altiarchaeum Ca. Altiarchaea
Abstract
AbstractCandidatusAltiarchaea are widespread across aquatic subsurface ecosystems and possess a highly conserved core genome, yet adaptations of this core genome to different biotic and abiotic factors based on gene expression remain unknown. Here, we investigated the metatranscriptome of twoCa. Altiarchaeum populations that thrive in two substantially different subsurface ecosystems. In Crystal Geyser, a high-CO2groundwater system in the USA,Ca. Altiarchaeum crystalense co-occurs with the symbi