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Engineered Orange Ectopically Expressing the Arabidopsis β-Caryophyllene Synthase Is Not Attractive to , the Vector of the Bacterial Pathogen Associated to Huanglongbing. | LitMetric

AI Article Synopsis

  • Huanglongbing (HLB) is a severe disease caused by bacteria spread by psyllids, affecting all citrus plants globally, with no known effective cure.
  • Current management strategies focus on controlling the psyllid population, removing infected trees, and using healthy plants, but economic losses and environmental impacts pose threats to the citrus industry.
  • Researchers have developed genetically modified sweet orange lines that emit a repellent compound to deter psyllids, which shows promise for a new control method in combating HLB in the field.

Article Abstract

Huanglongbing (HLB) is a destructive disease, associated with psyllid-transmitted phloem-restricted pathogenic bacteria, which is seriously endangering citriculture worldwide. It affects all citrus species and cultivars regardless of the rootstock used, and despite intensive research in the last decades, there is no effective cure to control either the bacterial species ( Liberibacter spp.) or their insect vectors ( and ). Currently, the best attempts to manage HLB are based on three approaches: (i) reducing the psyllid population by intensive insecticide treatments; (ii) reducing inoculum sources by removing infected trees, and (iii) using nursery-certified healthy plants for replanting. The economic losses caused by HLB (decreased fruit quality, reduced yield, and tree destruction) and the huge environmental costs of disease management seriously threaten the sustainability of the citrus industry in affected regions. Here, we have generated genetically modified sweet orange lines to constitutively emit ()-β-caryophyllene, a sesquiterpene repellent to , the main HLB psyllid vector. We demonstrate that this alteration in volatile emission affects behavioral responses of the psyllid in olfactometric and no-choice assays, making them repellent/less attractant to the HLB vector, opening a new alternative for possible HLB control in the field.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982956PMC
http://dx.doi.org/10.3389/fpls.2021.641457DOI Listing

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