Huanglongbing (HLB) is a highly destructive, fast-spreading disease of citrus, causing substantial economic losses to the citrus industry worldwide. Nutrient levels and their cellular distribution patterns in stems and leaves of grapefruit were analysed after graft-inoculation with lemon scions containing 'Candidatus Liberibacter asiaticus' (Las), the heat-tolerant Asian type of the HLB bacteri...

Abstract The global increase in human population has heightened the demand for citrus fruits and their derivatives, necessitating effective management strategies to mitigate impact of huanglongbing (HLB) disease. Caused by gram-negative bacteria such as ‘Candidatus Liberibacter asiaticus’, africanus’, americanus’, HLB is primarily transmitted insect vector Diaphorina citri. While traditional su...

Citrus production in Florida declined steadily because of Huanglongbing (i.e., HLB, citrus greening) caused by the bacteria Candidatus Liberibacter asiaticus. The objectives study were to determine whether leaf tissue nutrient concentration, tree growth, fruit yield, and juice content improved with split applications essential nutrients on selected rootstocks sandy soils. treatments arranged a ...

The full genomes of two uncultured plant pathogenic Liberibacter, Ca. Liberibacter asiaticus and Ca. Liberibacter solanacearum, are publicly available. Recently, the larger genome of a closely related cultured strain, Liberibacter crescens BT-1, was described. To gain insights into our current inability to culture most Liberibacter, a comparative genomics analysis was done based on the RAST, KE...

Abstract Trioza erytreae , the African citrus psyllid, is a vector of Candidatus Liberibacter spp., causal agent greening disease or Huanglongbing (HLB). The spread throughout Iberian Peninsula has been continuous since its introduction in mainland Spain 2014. patterns host preference and feeding behaviour largely depend on olfactory cues. Understanding these crucial to prevent further dispersi...

Huanglongbing, or citrus greening, threatens the global citrus industry. The presumptive pathogens, 'Candidatus Liberibacter asiaticus' and 'Ca. L. americanus' can be transferred from citrus to more easily studied experimental hosts by using holoparasitic dodder plants. However, the interaction between 'Candidatus Liberibacter' spp. and the dodder has not been studied. We combined quantitative ...

'Ca. Liberibacter asiaticus,' an insect-vectored, obligate intracellular bacterium associated with citrus-greening disease, also called "HLB," is a member of the Rhizobiales along with nitrogen-fixing microsymbionts Sinorhizobium meliloti and Bradyrhizobium japonicum, plant pathogen Agrobacterium tumefaciens and facultative intracellular mammalian pathogen Bartonella henselae. Comparative analy...

Previously, we reported that Candidatus Liberibacter asiaticus (Las)-infected Diaphorina citri are characterized by lower levels of cytochrome P450 monooxygenases than uninfected counterparts. In the present study, we investigated expression levels of family 4 cytochrome P450 (CYP4) genes in Las-infected and uninfected D.citri adults. Five novel CYP4 genes (CYP4C67, CYP4DA1, CYP4C68, CYP4DB1 an...