Li, Jinyun


Publications
9

Dynamics of ‘Candidatus Liberibacter asiaticus’ Growth, Concentrations of Reactive Oxygen Species, and Ion Leakage in Huanglongbing-Positive Sweet Orange

Citation
Pandey et al. (2024). Phytopathology® 114 (5)
Names
Ca. Liberibacter asiaticus
Abstract
Citrus Huanglongbing (HLB) caused by ‘ Candidatus Liberibacter asiaticus’ (CLas) is the most devastating citrus disease worldwide. CLas induces systemic and chronic reactive oxygen species (ROS) production, which has been suggested to be a primary cause of cell death in phloem tissues and subsequent HLB symptoms. Mitigating oxidative stress caused by CLas using horticultural approaches has been suggested as a useful strategy to reduce HLB damages. To provide information regarding the applicatio

Microscopic and Transcriptomic Analyses of Early Events Triggered by ‘Candidatus Liberibacter asiaticus’ in Young Flushes of Huanglongbing-Positive Citrus Trees

Citation
Pandey et al. (2023). Phytopathology® 113 (6)
Names
Ca. Liberibacter asiaticus
Abstract
‘ Candidatus Liberibacter asiaticus’ (CLas) is associated with the devastating citrus disease Huanglongbing (HLB). Young flushes are the center of the HLB pathosystem due to their roles in the psyllid life cycle and in the acquisition and transmission of CLas. However, the early events of CLas infection and how CLas modulates young flush physiology remain poorly understood. Here, transmission electron microscopy analysis showed that the mean diameter of the sieve pores decreased in young leaves

Citrus Huanglongbing is an immune-mediated disease that can be treated by mitigating reactive oxygen species triggered cell death of the phloem tissues caused by Candidatus Liberibacter asiaticus

Citation
Wang et al. (2021).
Names
Ca. Liberibacter asiaticus
Abstract
AbstractThe immune system is critical for keeping animals and plants healthy from pathogens. However, immune-mediated diseases are also common for human. Immune-mediated diseases have not been reported for plants. Here, we present evidence that citrus Huanglongbing (HLB), caused by phloem-colonizing Candidatus Liberibacter asiaticus (CLas), is an immune-mediated disease. CLas infection of Citrus sinensis stimulated systemic and chronic immune response in the phloem tissues including reactive oxy

Residue Dynamics of Streptomycin in Citrus Delivered by Foliar Spray and Trunk Injection and Effect on ‘Candidatus Liberibacter asiaticus’ Titer

Citation
Li et al. (2021). Phytopathology® 111 (7)
Names
Ca. Liberibacter asiaticus
Abstract
Streptomycin (STR) has been used to control citrus huanglongbing (HLB) caused by ‘Candidatus Liberibacter asiaticus’ (CLas) via foliar spray. Here, we studied the residue dynamics of STR and its effect on CLas titers in planta applied by foliar spray and trunk injection of 3-year-old citrus trees that were naturally infected by CLas in the field. After foliar spray, STR levels in leaves peaked at 2 to 7 days postapplication (dpa) and gradually declined thereafter. The STR spray did not signific

The Total Population Size of ‘Candidatus Liberibacter asiaticus’ Inside the Phloem of Citrus Trees and the Corresponding Metabolic Burden Related to Huanglongbing Disease Development

Citation
N.C. Vasconcelos et al. (2021). Phytopathology® 111 (7)
Names
Ca. Liberibacter asiaticus
Abstract
‘Candidatus Liberibacter asiaticus’ (CLas) is the predominant causal agent of citrus huanglongbing, the most devastating citrus disease worldwide. CLas colonizes phloem tissue and causes phloem dysfunction. The pathogen population size in local tissues and in the whole plant is critical for the development of disease symptoms by determining the load of pathogenicity factors and metabolic burden to the host. However, the total population size of CLas in a whole plant and the ratio of CLas to cit

The in Planta Effective Concentration of Oxytetracycline Against ‘Candidatus Liberibacter asiaticus’ for Suppression of Citrus Huanglongbing

Citation
Li et al. (2019). Phytopathology® 109 (12)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) or greening currently is the most devastating citrus disease worldwide. The fastidious phloem-colonizing bacterium ‘Candidatus Liberibacter asiaticus’ (CLas) is the causal agent of citrus HLB in Florida. Bactericides containing the active ingredient oxytetracycline (OTC) have been used in foliar spray to control citrus HLB in Florida since 2016. However, the minimum concentration of OTC required to suppress CLas in planta remains unknown. We developed a new method for evalua

The Candidatus Liberibacter–Host Interface: Insights into Pathogenesis Mechanisms and Disease Control

Citation
Wang et al. (2017). Annual Review of Phytopathology 55 (1)
Names
Liberibacter
Abstract
“Candidatus Liberibacter” species are associated with economically devastating diseases of citrus, potato, and many other crops. The importance of these diseases as well as the proliferation of new diseases on a wider host range is likely to increase as the insects vectoring the “Ca. Liberibacter” species expand their territories worldwide. Here, we review the progress on understanding pathogenesis mechanisms of “Ca. Liberibacter” species and the control approaches for diseases they cause. We d

‘Candidatus Liberibacter asiaticus’ Encodes a Functional Salicylic Acid (SA) Hydroxylase That Degrades SA to Suppress Plant Defenses

Citation
Li et al. (2017). Molecular Plant-Microbe Interactions® 30 (8)
Names
Ca. Liberibacter asiaticus
Abstract
Pathogens from the fastidious, phloem-restricted ‘Candidatus Liberibacter’ species cause the devastating Huanglongbing (HLB) disease in citrus worldwide and cause diseases on many solanaceous crops and plants in the Apiaceae family. However, little is known about the pathogenic mechanisms due to the difficulty in culturing the corresponding ‘Ca. Liberibacter’ species. Here, we report that the citrus HLB pathogen ‘Ca. L. asiaticus’ uses an active salicylate hydroxylase SahA to degrade salicylic