The citrus greening disease (also called huanglongbing) has devastated the Florida citrus industry, and is now in CA and TX. Fruit from infected trees is safe to eat, but production is reduced so much that citrus may cease to be inexpensive and broadly available. If you are a citrus lover you should know that massive research efforts, including this project, are underway to keep citrus affordable and plentiful. See impact on US production..

Citrus Greening Solutions is a USDA NIFA project.

Credit: Cilia lab

Diaphorina citri alimentary canal animation is online
Psyllids have a highly modified alimentary canal wherein the esophagus, anterior midgut, posterior midgut and hindgut are co-located and complexed into an apparently paraphyletic structure called the filter chamber. The animation is crafted to allow for broad scientific audiences to understand basic alimentary canal anatomy and functionality of the Asian citrus psyllid.
Economic impact of citrus industry in California
The total economic impact of the iconic citrus industry is $7.117 billion according to a new study commissioned by the Citrus Research Board (CRB). You can read the full report here.
Hunter et al. awarded patent for dsRNA treatment to reduce D. citri in citrus
dsRNA generated from D. citri trehalase gene is effective in reducing fitness and/or survival of D. citri. Thus genetically altered plants expressing the dsRNA and plants to which dsRNA solutions are applied increase D. citri mortality and reduce D. citri infestation. Read more
Diaphorina citri stylet biogenesis animation is online
The manufacture of new stylets (stylet biogenesis) is an extremely complex process that has been detailed in the potato psyllid. The animation shows examples of key features of the potato psyllid's process that are present in Diaphorina citri, indicating that both are comparable.
Missed the webinar for new Diaphorina citri v2.0 genome release?
The slides are available on slideshare. The v2.0 reference assembly and official Gene Set (v2.0) can be downloaded from the FTP site. You can browse the genome using jbrowse and explore the gene pages.
Webinar for new Diaphorina citri v2.0 genome and Official gene set v2.0 release
The improved v2.0 reference assembly has 1906 contigs and a contig N50 of 759Kb. We are also releasing a new Official Gene Set (v2.0) with 20,967 genes. We will be announcing more details in a webinar on March 5, 2018 (12-1pm EST, 9-10am PST, 5-6pm GMT). No login is required to join the webinar. Please click here to connect at the meeting time.
New updates posted on Diaphorina citri genome and annotation pages
We have added details about the interim genome v1.91 and the new WebApollo system that is hosted at Boyce Thompson Institute. Links to the BioCyc metabolic pathway databases have also been added to the genome pages.
Our paper describing the Diaci v1.1 genome, MCOT transcriptome and Official gene set v1.0 is now available online. Please see the supplementary data for details of manual curation.
Featured publications
Research highlights
Diaphorina citri nymphs are resistant to morphological changes induced by "Ca. Liberibacter asiaticus" in midgut epithelial cells
Translation? The gut cells of the Asian citrus psyllid nymphs do not respond the same way to infection by the Huanglongbing bacterial pathogen as adult guts. This was unexpected.
Scientists found a surprising visual difference between how nymph and adult guts of the Asian citrus psyllid (Diaphorina citri) respond to infection by "Ca. Liberibacter asiaticus," the causative bacterial agent of Huanglongbing (HLB), or Citrus greening disease. More
Guts of Asian citrus psyllid adults change on a molecular level when feeding on plants infected with the citrus greening bacterium
Kruse and her colleagues were interested in how CLas interacts with the gut to cross into the blood and be transmitted, and if the presence of CLas causes changes in the cells of the gut. To find out, researchers at the Boyce Thompson Institute and Cornell University began with hundreds of dissected guts from psyllids feeding on either healthy or CLas-infected citrus plants. More
Annotation Updates
C-Type Lectins
Report and protein sequences
C-Type Lectins(CTLs) are calcium dependent extracellular proteins involved in recognition of glycans. A total of 10 models were found and annotated. Refer to C-type lectin gene report for further details. The Basecamp page and FTP site contain the data sets and instructions for annotation.
Relish-like Proteins
Report and protein sequences
Relish-like proteins are transcription factors and are inlvolved in Imd pathway. The Basecamp page and FTP site contain the data sets and instructions for annotation.
Galactoside-Binding Lectins
Report and protein sequences
Galactoside-Binding Lectins (GALEs) or galectins bind to beta-galactoside sugars. GALEs are implicated in innate immunity as they might be involved in microbial recognition and/or phagocytosis. The Basecamp page and FTP site contain the data sets and instructions for annotation.
IOCV XXI and IRCHLB VI meeting
Abstract submissions are now open for the Joint Conference of the International Organization of Citrus Virologists XXI (IOCV XXI) and the International Research Conference on Huanglongbing VI (IRCHLB VI) to be held in Riverside, CA from March 10-15, 2019.
Third Annual CitrusGreening Solutions meeting
The Third Annual CitrusGreening Solutions meeting will be held on Dec 10-12th,2017 at University of California, Davis campus in CA.
International Research Conference on Huanglongbing
The IRCHLB V meeting was held in Orlando, FL from March 15-17th, 2017. See here for more information. The Cilia, Mueller and Shatters labs were represented at the meeting.
Psyllid Research
Citrus Research