Earth-Surface Processes


Publications
10

Candidatus Liberibacter asiaticus’ Expands and Scavenges the Nutritional Choline Pool in Its Host Grapefruit (Citrus × paradisi) Leaves

Citation
Jain et al. (2023). PhytoFrontiers™ 3 (4)
Names
Ca. Liberibacter asiaticus
Abstract
Phosphatidylcholine (PtdCho) is an unusual membrane phospholipid present in some endosymbiotic and intracellular pathogenic prokaryotes. ‘ Candidatus Liberibacter asiaticus’ (CLas) is a phloem-limited, uncultured, fastidious α-Proteobacterium associated with the devastating citrus “greening” disease (huanglongbing). Phylogenetically related but nonpathogenic Liberibacter crescens (Lcr) was used as a culturable surrogate to examine PtdCho biosynthesis in pathogenic CLas. Genes encoding key enzym

Hemp Abnormal Growth Is Attributed to Mono-, Di-, or Tri-Infections of Spiroplasma citri, ‘Candidatus Phytoplasma trifolii’, and Beet Curly Top Virus

Citation
Schoener, Wang (2023). PhytoFrontiers™ 3 (4)
Names
Ca. Phytoplasma trifolii
Abstract
As hemp ( Cannabis sativa) emerges as a commercial crop in Nevada, mild to severe abnormal growth has been observed from many plants in commercial fields throughout the growing season. Affected plants exhibited a group of symptoms typically including stunting, leaf yellowing, excessive apical branching, clusters of witches’ broom, leaf rolling upwards, and leaf mottling and mosaic. These symptoms mostly showed up together in a plant or a crop and are defined here as abnormal growth syndrome (AG

Physiological and Transcriptomic Analysis of ‘Candidatus Phytoplasma pruni’ Infection in Prunus persica

Citation
Wright et al. (2023). PhytoFrontiers™ 3 (2)
Names
Ca. Phytoplasma pruni
Abstract
‘ Candidatus Phytoplasma pruni’ is the causative agent of X-disease on peach ( Prunus persica) trees. Infected trees exhibit premature yellowing, leaf necrosis causing a shot-hole appearance, limb dieback, and eventual death. How pathogen infection leads to these symptoms is unknown. This study undertook a modern characterization of the disease by assessing the physiological and transcriptomic consequences of phytoplasma infection. Phytoplasma titer was high in the symptomatic tissues and undet

Rapid Movement of ‘Candidatus Liberibacter asiaticus’ on ‘Hamlin’ Sweet Orange and ‘Swingle’ Citrumelo Trunks

Citation
Pulici et al. (2023). PhytoFrontiers™ 3 (2)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB), caused by phloem-limited ‘ Candidatus Liberibacter asiaticus’ (CLas), is the primary limiting factor of production in most citrus regions of the world. After infection, CLas is transported systemically throughout the phloem tissues following the source-sink movement. Split-root rhizoboxes and one-sided graft inoculation above the split trunk was used to understand if the vertical distance of the inoculum source and different anatomical structures (grafted or seedling trees)

Function and molecular mechanism analysis of CaLasSDE460 effector involved in the pathogenesis of “Candidatus Liberibacter asiaticus” in citrus

Citation
Wang et al. (2023). Molecular Horticulture 3 (1)
Names
Ca. Liberibacter asiaticus
Abstract
AbstractCitrus Huanglongbing (HLB), caused by Candidatus Liberibacter asiaticus (CaLas), is the most serious disease worldwide. CaLasSDE460 was previously characterized as a potential virulence factor of CaLas. However, the function and mechanism of CaLasSDE460 involved in CaLas against citrus is still elusive. Here, we showed that transgenic expression of CaLasSDE460 in Wanjincheng oranges (C. sinensis Osbeck) contributed to the early growth of CaLas and the development of symptoms. When the te

Diversity and mineral substrate preference in endolithic microbial communities from marine intertidal outcrops (Isla de Mona, Puerto Rico)

Citation
Couradeau et al. (2017). Biogeosciences 14 (2)
Names
“Pleuronema testarum” “Pleuronema perforans” “Mastigocoleus perforans” “Pleuronema”
Abstract
Abstract. Endolithic microbial communities are prominent features of intertidal marine habitats, where they colonize a variety of substrates, contributing to their erosion. Almost 2 centuries worth of naturalistic studies focused on a few true-boring (euendolithic) phototrophs, but substrate preference has received little attention. The Isla de Mona (Puerto Rico) intertidal zone offers a unique setting to investigate substrate specificity of endolithic communities since various phosphate rock, l

Mats of psychrophilic thiotrophic bacteria associated with cold seeps of the Barents Sea

Citation
Grünke et al. (2012). Biogeosciences 9 (8)
Names
“Halobeggiatoa borealis” “Halobeggiatoa”
Abstract
Abstract. This study investigated the bacterial diversity associated with microbial mats of polar deep-sea cold seeps. The mats were associated with high upward fluxes of sulfide produced by anaerobic oxidation of methane, and grew at temperatures close to the freezing point of seawater. They ranged from small patches of 0.2–5 m in diameter (gray mats) to extensive fields covering up to 850 m2 of seafloor (white mats) and were formed by diverse sulfide-oxidizing bacteria differing in color and s