Gall-forming arthropods are highly specialized herbivores that, in combination with their hosts, produce extended phenotypes with unique morphologies [1]. Many are economically important, and others have improved our understanding of ecology and adaptive radiation [2]. However, the mechanisms that these arthropods use to induce plant galls are poorly understood. We sequenced the genome of the Hessian fly (Mayetiola destructor; Diptera: Cecidomyiidae), a plant parasitic gall midge and a pest of wheat (Triticum spp.), with the aim of identifying genic modifications that contribute to its plant-parasitic lifestyle. Among several adaptive modifications, we discovered an expansive reservoir of potential effector proteins. Nearly 5% of the 20,163 predicted gene models matched putative effector gene transcripts present in the M. destructor larval salivary gland. Another 466 putative effectors were discovered among the genes that have no sequence similarities in other organisms. The largest known arthropod gene family (family SSGP-71) was also discovered within the effector reservoir. SSGP-71 proteins lack sequence homologies to other proteins, but their structures resemble both ubiquitin E3 ligases in plants and E3-ligase-mimicking effectors in plant pathogenic bacteria. SSGP-71 proteins and wheat Skp proteins interact in vivo. Mutations in different SSGP-71 genes avoid the effector-triggered immunity that is directed by the wheat resistance genes H6 and H9. Results point to effectors as the agents responsible for arthropod-induced plant gall formation.
This article describes the planning, implementation, and evaluation of Research and Education Day, an event designed to promote education and awareness of sickle cell disease (SCD), while also fostering and increasing participation by families in research studies. Quantitative and qualitative evaluation data (tracking of participant attendance and participation in research studies; program evaluation surveys) indicate that program goals were achieved. Results show that event attendance, research participation and retention, and community volunteerism has increased exponentially over the 8-year history of the event. Parents report that their top-rated reasons for attending are learning about research studies and participating in SCD-related educational activities. Data also show that families learn about the event in multiple ways (i.e., flyers, clinic staff, word of mouth, etc.). Research and Education Day is a model for educating participants with sickle cell and their families, engaging them in research studies, and enhancing community awareness and support.
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