- Author: Kathy Keatley Garvey
The seminar is set for 4:10 p.m., Wednesday, May 17 and will only be virtual, announced host Shahid Siddique, nematologist. The Zoom link:
https://ucdavis.zoom.us/j/95882849672.
"The beech leaf disease nematode, Litylenchus crenatae mccannii, is recognized as a newly emergent nematode species that causes beech leaf disease (BLD) in beech trees (Fagus spp.) in North America," Vieira says in his abstract. "Since the first report of BLD on Fagus grandifolia in Ohio in 2012, the disease has rapidly spread to other states and Canada. This nematode has been so far reported in Pennsylvania, New York, Connecticut, Massachusetts, Maine, Michigan, Rhode Island, New Jersey, West Virginia, and Virginia, as well as Ontario. Leaf symptoms include swelling and darkening of interveinal tissues as well as chlorosis, while tissue necrosis and leaf curling occur at later stages of the disease. As a result, mortality of nematode infected understory beech trees has been reported after several years of infection in the United States. The fast dissemination of this nematode can impose a dramatic effect on beech forest ecosystems and natural diversity in North America."
Vieira says that "Little information on the molecular and cellular interaction between this nematode and its hosts is available. To advance our understanding into this unknown host- nematode system, we investigated the cytological aspects of this interaction using bright-field and scanning electron microscopy. Our data reveal that these nematodes can induce morphological changes in both bud and leaf tissues, which so far seem unique in the Nematoda phylum. These cellular changes ultimately provide the necessary nutrients for completion of the nematode life cycle, while dramatically affecting bud and leaf morphology. In addition, we used Illumina mRNA sequence analysis of a mixed stage population to obtain insight into the transcriptome of this nematode. Gene comparative analyses were combined to select a list of candidate effector/parasitism genes. Spatial expression of transcripts within the esophageal glands of L. crenatae mccannii by in situ hybridization validated a list of pioneer effectors novel to this species and across the Nematoda phylum. These analyses provide additional data for understanding the mode of parasitism of this newly emergent plant-parasitic nematode."
Vieira, who joined USDA-ARS in November 2021, holds a master's degree (2007) in plant pathology, phytopathoogy from the University of Évora, Portugal, and a doctorate (2012 in plant pathology, plant-nematode interaction from the University of Nice Sophia-Antipolis and Institute Sophia Agrobiotech, France. His resume includes postdoctoral researcher at the University of Évora (2012-2013) and USDA (2013-2015). Vieira served as a researcher in molecular biology at Virginia Tech for eight years before joining USDA-ARS in Beltsville.
Vieira's current research interests:
- Identification and functional analyses of effectors of plant-parasitic nematodes
- Genomics and transcriptomics of plant-parasitic nematodes, with a particular focus on migratory nematodes
- Plant-nematode interaction studies using cell and molecular biology approaches
Department seminar coordinator is urban landscape entomologist Emily Meineke, assistant professor. For technical issues regarding Zoom connections, she may be reached at ekmeineke@ucdavis.edu. (See complete list of spring seminars.)
Related Resources:
First report of the beech leaf disease nematode Litylenchus crenatae mccannii (Nematoda: Anguinidae) in Michigan (Plant Disease journal, Nov. 22, 2022)
Paulo Vieira: Google scholar, Twitter accounts
- Author: Kathy Keatley Garvey
Her talk will be in 122 Briggs Hall and also will be virtual. The Zoom link:
https://ucdavis.zoom.us/j/95882849672.
"The most important agricultural insect, the honey bee, houses multiple bacterial symbionts that provide distinct benefits under environmental stress," Newton says in her abstract. "Our lab has been at the forefront of identification and characterization of the honey bee microbiome, using a polyphasic approach combining in vivo, in vitro, microbiological, and 'omics assays. I will present our most recent results on the microbe Bombella apis - who it is, what it's doing in association with the bee, and its evolution in symbiosis."
A pre-seminar coffee will take place from 3:30 to 4:10 p.m. in 158 Briggs.
Irene, a first-generation, Latina scientist, received her doctorate from Harvard University in 2008 and served as a postdoctoral fellow at Tufts University from 2008 to 2010. She grew up in south Florida, the daughter of immigrant parents from Cuba and the Dominican Republic. She began her research experience as an undergraduate student at Swarthmore College under Rachel Merz.
She continued her training as a Howard Hughes predoctoral fellow with Colleen Cavanaugh at Harvard University, where she completed her dissertation, focused on functional genomics in deep sea hydrothermal vent symbionts. She joined the faculty of Indiana University in 2011.
"The Newton Laboratory is broadly interested in host-associated microbes," she writes on her website. "We study who those microbes are, what those microbes are doing , how they persist and infect and what the consequences are to their genomic evolution. Projects in the laboratory range from highly mechanistic and cell biological to ecological and bioinformatic."
For her work with IU students, she won the Outstanding Mentor Award (2022) and the Trustees Teaching Award (2017). Her other honors include American Academy of Microbiology Fellow, 2023; American Society for Microbiology Honorary Diversity Lecturer Award, 2023; American Association for the Advancement of Science Fellow, and 2022 Woodrow Wilson Foundation Fellow, 2013.
Department seminar coordinator is urban landscape entomologist Emily Meineke, assistant professor. For technical issues regarding Zoom connections, she may be reached at ekmeineke@ucdavis.edu. (See complete list of spring seminars.)
- Author: Kathy Keatley Garvey
The annual event, free and family friendly, takes place from 10 a.m. to 5 p.m., Saturday, May 6 in downtown Woodland.
Pollination ecologist Neal Williams, professor, UC Davis Department of Entomology and Nematology and a 2015-2020 Chancellor's Fellow, will present a talk on "Pollination, the Importance of Native Bees and How to Promote Them" at 10:30 a.m. on the UC Davis Speakers' Stage.
"Pollination by insects, mostly bees, is critical to human wellbeing," Professor Williams said. "An astonishing 75 percent of food crops benefit to some extent from pollination, most of it provided by managed and wild bees. When thinking about pollination of crops, most of us consider honey bees–and they are a critical part of crop pollination. However, native bees also play an important role and in some cases are better pollinators of crops than honey bees. In the presentation, I will provide an overview of the diversity, life history and biology of native bees. I will then discuss how we can use an understanding of bee biology to help sustain and promote diverse communities of wild bees."
Williams' research interests include pollination ecology, bee biology with emphasis on foraging behavior, ecology and evolution of trophic specialization and plant-pollinator interactions, landscape change and community dynamics, ecosystem services and conservation;
The California Honey Festival, launched in 2017 to celebrate the importance of bees and to promote honey and honey bees and their products, last year drew a crowd of 40,000.
Amina Harris, director of the UC Davis Honey and Pollination Center, Robert Mondavi Institute, and a co-founder of the festival, announced the list of speakers who will deliver 20 to 30-minute talks on the UC Davis Speakers' Stage, located just west of First Street.
10:30 a.m.: Pollination ecologist and professor Neal Williams, UC Davis Department of Entomology and Nematology, who will discuss "Pollination, the Importance of Native Bees and How to Promote Them"
11 a.m.: Kitty Bolte, GATEways horticulturist, UC Davis Arboretum and Public Garden, "Planting Your Garden to be a Welcoming Space for Pollinators"
12 noon: Amina Harris, director of the UC Davis Honey and Pollination Center, and co-owner of Z Food Specialty and The HIVE, Woodland, "Let's Learn to Taste Honey."
1 p.m.: Wendy Mather, co-program manager of the California Master Beekeeper Program (CAMPB), "So, You Want to Be a Beekeeper?"
1:30 p.m.: Jean-Philippe Marelli, senior director of Integrated Pest Management for Mars Wrigley Confectionery (also a journey level master beekeeper and Melipona beekeeper in Brazil), "Stingless Bees: The Amazing World of Melipona Bees"
2 p.m.: Cooperative Extension apiculturist/associate professor Elina Lastro Niño of Entomology and Nematology, and director of the California Master Beekeeper Program (CAMPB), "What Our Bee Research Is Teaching Us."
2:30 p.m.: Sanmu "Samtso" Caoji, a 2022-23 Hubert Humphrey fellow, and founder of the Shangri-la Gyalthang Academy, and CEO of the Cultural Information Consulting Company, "Empowering Women to Become Beekeepers and Bread Winners for Their Families While Keeping Bees in the Wild"
3 p.m.: Rachel Davis, coordinator of Bee City USA Woodland and chair of Bee Campus USA UC Davis (GATEways Horticulturist for the UC Davis Arboretum and Public Garden), "Woodland Is a Bee City; UC Davis Is a Bee City--What This Means to Our Communities"
UC Davis Department of Entomology and Nematology communications specialist Kathy Keatley Garvey will provide a background slide show of honey bees and native bees.
The event is both educational and entertaining. Attendees can taste honey, check out the bee observation hives, watch cooking demonstrations and kids' shows, taste mead and other alcoholic drinks (if of age) and learn about bees from beekeepers and bee scientists. Vendors, offering various products and food, will line the streets.
The UC Davis-based California Master Beekeeper Program, founded in 2016 by Niño, provides a program of learning, teaching, research, and public service. They offer comprehensive, science-based information about honey bees and honey bee health. Since 2016, the organization has donated 32,000 hours of volunteer time and served 186,630 individuals in education, outreach and beekeeping mentorship. Read more about their classes and their work on their website.
An after-party will be held from 5 to 9 p.m. at The HIVE Tasting Room and Kitchen, 1221 Harter Ave., Woodland. It will feature pollinator-inspired food, drinks, and dancing to the music of Joy and Madness, an 8-piece soul and funk group. Tickets are $20 and will benefit the California Master Beekeeper Program. "Each ticket includes entry to win a bountiful Yolo County food and drink basket (value $500)," Harris said. More information is on this website.
- Author: Kathy Keatley Garvey
The link: https://youtube.com/@
"The impact of bees on our planet is immeasurable," he says. "Bees are responsible for the evolution of the vast array of brightly-coloured flowers and for engineering the niches of multitudes of plants, animals, and microbes. They've painted our landscapes with flowers through their pollination activities and have evolved the most complex societies to build and exploit the environment. The biology of the honey bee is one that reflects their role in transforming environments with their anatomical adaptations and a complex language that together function to harvest floral resources. A social system that includes a division of labor builds, defends, and provisions nests containing tens of thousands of individuals, only one of whom reproduces."
"This YouTube channel series presents fundamental biology, not in organizational layers, but wrapped around interesting themes and concepts, and in ways designed to explore and understand each concept," explained Page, who retired in 2019. "It examines the co-evolution of bees and flowering plants, bees as engineers of the environment, the evolution of sociality, the honey bee as a superorganism and how it evolves, and the mating behavior of the queen."
The content is derived from his book, The Art of the Bee: Shaping the Environment from Landscapes to Societies, (Oxford University Press, 2020).
His YouTube channel is divided into six segments:
Episode 1: “Darwin's Abominable Mystery”
Episode 2: “Floral Adaptations”
Episode 3: “Adaptations of Bees”
Episode 4: “Dance Language”
Episode 5: “Navigation”
Episode 6: “Time Scales of Change”
Environmental Engineers:
Episode 1: “Environmental Engineering”
Episode 2: “Niche Construction”
Episode 3: “Nest Defense in Niche Construction”
The Social Contract:
Episode 1: “Political Philosophy of Bees Social Contract”
Episode 2: “Complex Social Structures”
Episode 3: “Power and Will of Social Insects”
Episode 4: “Evolution of Altruism in Bees”
Episode 5: “Public Health and Bees”
Episode 6: “Honey Bee Public Works, Welfare Immigration”
Superorganisms:
Episode 1: “What Is a Superorganism?”
Episode 2: “Reproduction, Protection and Nutrition”
Episode 3: “Biogenic Law and Baers Law”
Episode 4: “Germ Plasm Theory”
Episode 5: “A Metaphor or an Entity”
How to Make a Superorganism:
Episode 1: “The Spirit of the Hive”
Episode 2: “Division of Labor”
Episode 3: “Colony Level Selection”
Episode 4: “Phenotypic Architecture”
Episode 5: “Phenotypic and Genetic Architectures”
Episode 6: “Bee Development”
Song of the Queen:
Episode 1: “Natural History and Castes”
Episode 2: “The Song Begins: Making a New Queen”
Episode 3: “Conditions that Stimulate Queen Rearing”
Episode 4: “Where Do Queens Mate?”
Episode 5: “How Do Queens Mate? How Many Times?”
Episode 6: “Polyandry and Sperm Use”
Page joined Arizona State University in 2004, after retiring as Professor Emeritus and Chair Emeritus, UC Davis Department of Entomology, to be founding director of the School of Life Sciences. He served as provost of Arizona State University (2013- 2015) and dean of the College of Liberal Arts and Sciences (2011-2013). His research on honey bee behavior and genetics appears in his publications Queen Rearing and Bee Breeding (1997, with Harry H.Laidlaw Jr. his doctoral research mentor at UC Davis and "the father of honey bee genetics"); The Spirit of the Hive, Harvard University Press (2013); and The Art of the Bee, Oxford University Press (2020). His 230-plus research papers have been cited more than 20,000 times.
Much of his research occurred at UC Davis. For 24 years, from 1989 to 2015, Page maintained a honey bee-breeding program, managed by bee breeder-geneticist Kim Fondrk. Their contributions include discovering a link between social behavior and maternal traits in bees. Their work was featured in a cover story in the journal Nature. In all, Nature featured his work on four covers from work mostly done at UC Davis.
Highly honored by his peers, the honey bee geneticist is an elected member of the American Academy of Arts and Sciences, the Brazilian Academy of Science, Leopoldina--the German National Academy of Science, and the California Academy of Sciences. His many awards include the Humboldt Research Prize, Fellow (elected) of the Entomological Society of America (ESA), and recipient of the both the Eastern and Western Apicultural Society Research Awards.
Page's UC Davis honors include:
- Thomas and Nina Leigh Distinguished Alumni Award (2018) from UC Davis Department of Entomology and Nematology
- UC Davis Distinguished Emeritus Professor (2019), one awarded annually, UC Davis Emeriti Association
- Exceptional Emeriti Faculty Award (2022), UC Davis College of Agricultural and Environmental Sciences
He most recently won the 2023 C. W. Woodworth Award, the highest honor that the Pacific Branch of ESA offers. “Dr. Page is a pioneering researcher in the field of evolutionary genetics and social behavior of honey bees, and a highly respected and quoted author, teacher and former administrator,” wrote nominator Steve Nadler, professor and chair of the UC Davis Department of Entomology and Nematology. Page is the 12th UC Davis recipient of the award, first presented in 1969. Laidlaw won the award in 1981. (See news story)
- Author: Kathy Keatley Garvey
Research.com just released its 2023 rankings, based on a researcher's D-index (Discipline H-index) metric, which includes only papers and citation values for an examined discipline. For chemistry, the organization singled out leading scientists with a D-index of at least 40 for academic publications.
Gee achieved a D-index of 56, 8,287 citations, and 202 publications.
“We already knew she's one of the nation's best chemists; we're so proud of her,” said Hammock, a UC Davis distinguished professor who holds a joint appointment with the Department of Entomology and Nematology and the UC Davis Comprehensive Cancer Center.
Her statistics are “better than most of the chemists in the UC Davis Department of Chemistry,” Hammock added.
“This is a pleasant surprise and I am honored,” Gee said. “But, it would not have been possible without Bruce's mentorship and all the hard work of the many graduate students and postdocs that have come through our lab. Their eagerness and creativity and the ready availability of both lab and campus wide collaborators, as well as the multidisciplinary nature of the lab let them bring many new ideas to fruition. So my deepest gratitude goes to all of them. I just tagged along for the ride!”
“In addition to her scientific leadership Shirley became the personal focus of the field with her personal encouragement and attachment for scientists internationally,” Hammock related. “She made Davis the place to come to get the latest in technology and made international introductions and fostered collaborations that continue to be productive today.”
The UC Davis toxicologist was among the first staff research associates at UC Davis to be given principal investigator status on grants. "On her own, she developed a computer-based chemical and equipment inventory system in the laboratory which could be used throughout the university," Hammock said.
Gee's work has been recognized repeatedly with achievement awards and publications in peer-reviewed journals. Her area of expertise is the development of "ELISA" (enzyme-linked immunosorbent assays) for pesticides and other environmental pollutants and their metabolites. She has trained students from around the world.
Gee was a toxicologist at SRI International in Menlo Park for three years before joining the Hammock lab in 1985. In the Hammock lab, she managed a team of researchers for more than three decades that annually included some 40 scientists: graduate students, technicians, post graduates and visiting professors from all over the world. From 2007 to 2016, she served as the director of research and founding member/manager of Synthia LLC, Davis.
“I have long been interested in human and environmental exposure to toxicants and utilizing screening methods to evaluate the presence of the toxicant as well as the potential for effects,” Gee writes in her biosketch. “Immunoassays have been used clinically for more than 50 years to detect the presence of drugs, hormones and microorganisms for human medical diagnostics.”
Hammock, a pioneer in the field that applies immunoassay and biosensor technology to environmental toxicants, noted that “Shirley led a project that extended the technology to measurement of a variety of environmental toxicants including pesticides, industrial byproducts, bioterror agents and flame retardants. It also included the application of new concepts to improve the robustness, sensitivity and high throughput that is required for environmental analysis and for the analysis of low-level exposure to toxicants in humans and animals in large scale studies.”
Gee has collaborated with investigators from the U.S. Environmental Protection Agency, Uruguay, Mexico, and Sweden using the assays for dioxins. She participated in a farmworker exposure study on the herbicide paraquat in Costa Rica and a farmer/consumer study in Thailand on exposure to pyrethroid insecticides. She is also noted for exploring novel immunoassay technologies, such as the use of nanobodies and to transfer this technology to end users throughout the world.
Four-Fold Contributions
Her major contributions to science are four-fold:
1. Her dissertation work focused on the comparative metabolism of xenobiotics in vivo and in vitro. She worked with a variety of organisms including rats, mice, monkeys, insects, and marine invertebrates. This provided a foundation for later work on the development of novel primary hepatocyte cell cultures as high throughput screening methods to assess xenobiotic toxicity and to explore mechanism of toxicity. Her colorimetric assay for monitoring cytochrome P450 assays is the basis of assays used now to monitor these enzymes in projects ranging from drug metabolism to environmental health.
2. Working with Hammock who pioneered the development of immunoassays for pesticides, Gee developed the first immunoassays for pesticides found as ground and surface waters contaminants by the California Department of Pesticide Regulation. Some of these assays were transferred to their analytical laboratory where in the early 1980s they helped end fish kills and drinking water contamination from rice herbicides. Shortly thereafter she co-authored a user's manual on assay development and use as a cooperative project with the U.S Environmental Protection Agency (EPA). The basic assay development and validation continues today and has found application to many environmental contaminants and includes the development of commercially available test kits.
3. Her interest in metabolism led her back to extending assay development from parent compounds to their metabolites. “Metabolites excreted in urine are useful biomarkers of exposure and the immunoassays developed have been used in several exposure studies,” Gee explained. “The studies have provided guidance to help reduce pesticide exposure by examining pesticide exposure patterns based on urine tests, then relaying educational information to the population.”
4. Since 1975 the gold standard of antibody reagents has been monoclonal antibodies. Touted as a better defined and continuously available reagent for immunoassays, monoclonal antibodies have applications both in analytical chemistry, including such things as home pregnancy kits and therapeutics where many new drugs are monoclonal antibodies. However, they are limited because their size does not allow penetration of the cell membrane and ‘humanizing' them for therapeutics is difficult. At 1/10th the size, single domain antibodies derived from camelids (VHH) will penetrate cell membranes, are easy to clone, express and genetically modify. Leading a team of researchers Gee explored the utility of these novel antibodies for the detection environmental contaminants and other small molecules.
In 2011, Gee received the UC Davis Staff Assembly's Citation for Excellence, presented by the chancellor. “Shirley seeks ways to help the lab and the department be successful,” the nominators wrote. “She is extremely efficient and effective” and a “can-do person skilled at anticipating and solving problems in a friendly, courteous and timely manner.”