Her topic is "How Does the Time of Eating Affecting Our Circadian Physiology?" Access this form for the Zoom link.
The abstract: "The integration of circadian and metabolic signals is essential for maintaining robust circadian rhythms and ensuring efficient metabolism and energy use. Using Drosophila as an animal model, we showed that clock-controlled feeding-fasting cycles is strongly correlated to daily protein O-GlcNAcylation rhythms, which may represent a key post-translational mechanism that regulates circadian physiology. Our results could shed light on the benefits of TRE (or intermittent fasting) and the extent to which modern human lifestyles contribute to the current epidemic of metabolic disorders."
The host is her major professor, Joanna Chiu, a molecular geneticist and physiologist, vice chair of the UC Davis Department of Entomology and Nematology and a Chancellor's Fellow. Liu is currently working in the Chiu lab as a postdoctoral fellow.
For her thesis, Liu explored the interplay between circadian clock and metabolism in maintaining animal health using Drosophila melanogaster as a model. Specifically, she investigated the regulation of cellular protein O-GlcNAcylation by circadian clock and metabolic signals. O-GlcNAcylation is a nutrient senstive post-translational modification that can alter the structure and function of thousands of cellular proteins. She is fascinated by how circadian biology can be shaped by multiple factors through complex mechanisms. Her long-term goal is to understand how molecular pathways are coordinated temporally to maintain animal health and wellness.
Liu received her bachelor's degree in biological sciences in 2014 from Beijing Forestry University, China. She was a recipient of a CSC-UC Davis Joint Fellowship.
Coordinating the fall seminars is Cooperative Extension specialist and agricultural entomologist Ian Grettenberg, assistant professor, UC Davis Department of Entomology and Nematology. He may be reached at imgrettenberger@ucdavis for any technical issues.
The UC Davis Department of Entomology and Nematology's seminar on Wednesday, Feb. 26 will feature six “Faculty Flash Talks.”
The seminar, set from 4:10 to 5 p.m. in 122 Briggs Hall, will include Joanna Chiu, Jason Bond, Geoffrey Attardo, Rachel Vannette, Julia Fine, and Arathi Seshadri.
Associate professor Joanna Chiu, vice chair of the department, will present “results from a project in which we study the mechanisms by which insects sense environmental changes (temperature and photoperiod) to regulate their seasonal physiology. Our lab has identified a protein that can track seasonal changes in temperature and photoperiod to promote winter physiology. Without this protein, insects don't know winter is coming!”
Her laboratory research interests include molecular genetics of animal behavior, Circadian rhythm biology, and posttranslational regulation of proteins.
Jason Bond, Schlinger Chair in Insect Systematics, is a global expert on spiders. His research interests include systematics, taxonomy, and evolution of terrestrial arthropods with an emphasis on arachnids and myriapods. "We employ molecular, morphological, and ecological approaches to study questions related to evolutionary diversification at multiple hierarchical levels (populations – higher taxa)," he says. (See recent grant.)
Geoffrey Attardo, a medical entomologist/geneticist, focuses his research on insect disease vectors, insect reproduction, vector/parasite interactions, reproductive physiology, male seminal secretions, symbiosis, lactation, nutrition, lipid metabolism, transcriptional regulation, comparative genomics, transcriptomics, proteomics and metabolomics. His research on tsetse flies was recently featured on KQED's Deep Look (see news story on Deep Look). (See news story on landmark research.)
Rachel Vannette, community ecologist and assistant professor who coordinates the department's seminars, says: "All plants are colonized by microorganisms that influence plant traits and interactions with other species, including insects that consume or pollinate plants. I am interested in the basic and applied aspects of microbial contributions to the interaction between plants and insects. I also use these systems to answer basic ecological questions, such as what mechanisms influence plant biodiversity and trait evolution." (See recent research)
Arathi Seshadri and Julia Fine, who recently joined the USDA-ARS lab on Bee Biology Road, UC Davis, aim to improve honey bee survival and beekeeping sustainability in California and nationwide. They collaborate with federal, university, non-governmental and industry partners. (See news story on opening of the facility.)
Seshadri, a pollination biologist with expertise in honey bee behavior and plant reproductive strategies, is working with beekeepers and farmer stakeholders to develop projects aimed at finding solutions to the ongoing pollination challenges. Also trained as an evolutionary biologist, she has applied principles of plant-pollinator mutualism, specifically the impact of phytochemicals in pollen and nectar on honey bee health and colony performance. Her contributions to pollinator conservation include enhancing the sustainability of all pollinators, including native bees on farms and urban areas. She also has expertise in agroecosystem-based approaches and citizen science programs to promote pollinator diversity and abundance.
Fine, an entomologist with expertise in insect toxicology, honey bee physiology, reproduction and development, focuses her research on identifying how stressors impact honey bee behavior, health and fecundity. She uses both established and novel laboratory techniques. Her previous projects involved investigating how agrochemical and viral stressors interact to affect the development and survival of honey bee brood and how nutritional stress affects honey bee queen fecundity. In engaging with beekeepers and growers, Fine is researching how realistic biotic and abiotic stressors affect honey bee reproduction, longevity and pollination services, and she is identifying techniques and strategies to overcome these effects.
The seminar is open to all interested persons. For more information, contact Vannette at firstname.lastname@example.org.
The program, established in 2000 to honor the achievements of outstanding faculty members early in their careers, is funded in part by the Davis Chancellor's Club and the Annual Fund of UC Davis. Each will receive $25,000 for their research or other scholarly work and hold the title of "Chancellor's Fellow" for five years.
Ramirez, with the Department of Evolution and Ecology, College of Biological Sciences, is a global expert on orchid bees. He received his doctorate from Harvard. Ramirez is a frequent speaker at seminars and conferences affiliated with the UC Davis Department of Entomology and Nematology, including the UC Davis Honey and Pollination Center.
This year's list of Chancellor's Fellows:
- Christopher Barker, veterinary medicine
- Eleonora Grandi, medicine
- Jane Gu, electrical and computer engineering
- Erin Hamilton, sociology
- Maceo Montoya, Chicana and Chicano studies
- Santiago Ramirez, evolution and ecology
- Christopher Simmons, food science and technology
- Anne Todgham, animal science
- Aijun Wang, medicine
- Megan Welsh, education
- Nicolas Zyns, anthropology
“Each year, entrepreneurially minded PhD or postdoctoral students are invited to join venture capital partners onsite to gain first-hand experience on what it takes to have a successful startup, then apply that knowledge to develop and de-risk their own potential technology, product or process at UC Davis,” according to an IIFH news release.
Abrieux, whose project is titled “Improving Integrated Pest Management (IPM) Practices with Biotechnology,” is working with The Production Board (TPB), a San Francisco-based technology incubator and investment holding company that aims to improve the efficiency and economics of global food and agriculture markets.
Recipient Tawny Scanlan, a UC Davis doctoral candidate in animal biology, is researching “Enhancing Production Efficiency and Sustainability in Aquaculture” and working with Food for Thought Worldwide Ventures (FTW), a San Francisco-based early-stage venture fund investing in breakthrough hardware, software and biotech solutions in the worldwide food system.
Abrieux is utilizing his expertise in insect physiology, behavioral analysis and molecular biology to tackle problems related to agriculture and enhance food security. He seeks to develop innovative approaches in biotechnology to improve IPM practices by translating basic research into applied solution and ensure crop production sustainability.
Abrieux received his doctorate in biology from Angers University, western France, where investigated the role of hormones and biogenic amines in the behavioral response to the sex pheromone in the noctuid Agrotis ipsilon. He joined the Chiu lab in the spring of 2016 as a postdoctoral fellow.
In the Chiu lab, he explores the interactions between the clock and endocrine system underlying seasonal adaptation in the pest, the spotted-wing drosophila, Drosophila suzukii. “I am particularly interested in developing integrative approaches to better understand how physiological state and behavior could be modulate at both transcriptional and translational levels and facilitate insect adaptability to changing environments.” (He presented a UC Davis Department of Entomology and Nematology seminar on "Understanding the Molecular Mechanisms Underlying Photoperiodic Time Measurement in Drosophila melanogaster" in February 2018.)
"I am convinced that biotechnologies can have an important and beneficial impact on society,” Abrieux says, “and the likelihood to facilitate progress is considerably increased through collaborative efforts between actors from diverse domains of expertise.”
His supervisor, associate professor Joanna Chiu, vice chair of the UC Davis Department of Entomology and Nematology, commented: “The Production Board Fellowship represents a perfect opportunity for Antoine to advance his understanding of the food security market and current needs, and to develop entrepreneurship ideas that he can take with him to the next stage of his career."
Abrieux, fascinated with insects since his childhood, maintains a photography website, including macro images of insects at https://antoineabrieux.wixsite.com/antoine-abrieux/portfolio.
(Editor's Note: IIFH contributed to this news release)
The UC Davis recipients, as announced today:
Molecular geneticist/physiologist Joanna Chiu, vice chair of the department, associate professor and Chancellor's Fellow, won the Physiology, Biochemistry, and Toxicology Award. The annual award is presented to an individual who has an outstanding record of accomplishment in at least one of the entomological sub-disciplines of physiology, biochemistry, and toxicology.
Pollination ecologist Neal Williams, professor, won the Plant-Insect Ecosystems Award. The annual award is given to an individual with outstanding accomplishments in the study of insect interrelationships with plants.
Doctoral candidate and ant specialist Brendon Boudinot who studies with Professor Phil Ward, won the 2019 John Henry Comstock Graduate Student Award, the top graduate student award. This award is based on academic record, leadership, public service activities, participation in professional activities, and publications.
They will be honored at PBESA's 103rd annual meeting, to take place March 31 - April 3 in San Diego, California.
The University of California accounted for eight of the 12 PBESA awards, with UC Davis winning four, UC Riverside, three, and the UC Agriculture and Natural Resources (UC ANR), one.
Joanna Chiu, Physiology, Biochemistry, and Toxicology Award
"Dr. Chiu not only excels in unique and cutting-edge research, both basic and applied, but has distinguished herself in mentoring, teaching and service contributions,” said Steve Nadler, professor and chair of the UC Davis Department of Entomology and Nematology, who nominated her for the award.
She studies how genes and proteins regulate animal physiology and behavior in response to changes in environment and resources. Her research involves molecular genetics of animal behavior, circadian rhythm biology, and posttranslational regulation of proteins. Major grants from the National Institutes of Health and the National Science Foundation fund her research.
Chiu investigates the regulation of animal circadian rhythms in her laboratory by using a combination of molecular genetics, biochemical, genomic, proteomic, and metabolomic approaches. Her overall research goal: to dissect the molecular and cellular mechanisms that control the circadian clock in animals, and to investigate how this endogenous timer interacts with the environment and cellular metabolism to drive rhythms of physiology and behavior.
Neal Williams, Plant-Insect Ecosystems Award
"Dr. Williams is widely known and respected for his excellence in research, extension, outreach, teaching, leadership and mentoring," said Nadler. “He is a leading voice in the development of collaborative research on insect ecology. He has organized national and international conferences, leads scores of working groups, and guides reviews of impacts of land use and other global change drivers on insects and the services they provide.”
Williams focuses his research on the ecology and evolution of bees and other pollinator insects and their interactions with flowering plants. His work is particularly timely given concern over the global decline in bees and other pollinators.
In July, Williams will co-chair the Fourth International Conference on Pollinator Biology, Health and Policy at UC Davis. The four-day conference, themed “Multidimensional Solutions to Current and Future Threats to Pollinator Health,” will highlight recent research advances in the biology and health of pollinators, and link to policy implications.
Brendon Boudinot, John Henry Comstock Graduate Student Award
Brendon Boudinot was praised for his academic record, leadership, public service activities, participation in professional activities, and his publications. “A highly respected scientist, teacher and leader with a keen intellect, unbridled enthusiasm, and an incredible penchant for public service, Brendon maintains a 4.00 grade point average; has published 12 outstanding publications on insect systematics (some are landmarks or ground-breaking publications); and engages in exceptional academic, student and professional activities,” Nadler wrote.
Active in PBESA and ESA, Boudinot received multiple “President's Prize” awards for his research presentations at national ESA meetings. He organized the ESA symposium, “Evolutionary and Phylogenetic Morphology,” at the 2018 meeting in Vancouver, B.C. , and delivered a presentation on “Male Ants: Past, Present and Prospects” at the 2016 International Congress of Entomology meeting in Orlando, Fla.
Boudinot served on—and anchored—three of the UC Davis Linnaean Games teams that won national or international ESA championships. The Linnaean Games are a lively question-and-answer, college bowl-style competition on entomological facts played between university-sponsored student teams.
Boudinot has served as president of the UC Davis Entomology Graduate Student Association since 2006, and is active in the campuswide UC Davis Picnic Day; he has co-chaired the department's Picnic Day Committee since 2017.
Jessica Gillung, Early Career Award
Jessica Gillung studied for her doctorate with major professor Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology. “Dr. Gillung has made outstanding contributions to entomology, shown commitment to extension or outreach, and excelled in entomological education,” Kimsey wrote in her letter of nomination. “In one word: she is ‘phenomenal.' Gillung most recently won the “Best Student Presentation Award” at the ninth annual International Congress of Dipterology, held in Windhoek, Namibia, and the 2018 PBESA Student Leadership Award. Her dissertation was titled: “Systematics and Phylogenomics of Spider Flies (Diptera, Acroceridae).”
Kimsey praised her phenomenal leadership activities, her nearly straight-A academic record (3.91 grade point average), her excellence as an entomologist and teacher, and her incredible publication record. “Note that she has 11 refereed publications on her thesis organisms in very strong journals,” Kimsey wrote. “Most entomologists do not publish nearly that much, even as a postdoctoral scholar or a junior faculty member!”
As a postdoctoral researcher at Cornell University in the Bryan Danforth lab, Gillung is researching Apoidea (stinging wasps and bees) phylogenomics, evolution and diversification.
PBESA Award Recipients
The complete list of PBESA recipients:
- CW Woodworth: Elizabeth Grafton-Cardwell, UC Riverside.
- PBESA Award for Excellence in Teaching: Allan Felsot, Washington State University
- PBESA Award for Excellence in Extension: Surendra Dara, UC Cooperative Extension
- PBESA Award for Excellence in Integrated Pest Management: Silvia Rondon, Oregon State University
- PBESA Systematics, Evolution, and Biodiversity Award: Christiane Weirauch, UC Riverside
- PBESA Physiology, Biochemistry, and Toxicology Award: Joanna Chiu, UC Davis
- PBESA Medical, Urban, and Veterinary Entomology Award: Rebecca Maguire, Washington State University
- PBESA Plant-Insect Ecosystems Award: Neal Williams, UC Davis
- PBESA Distinction in Student Mentoring Award: Gerhard Gries, Simon Frazier University, British Columbia
- PBESA Excellence in Early Career Award: Jessica Gillung, UC Davis
- John Henry Comstock Graduate Student Award: Brendon Boudinot, UC Davis
- PBESA Student Leadership Award: Kelsey McCalla, UC Riverside
PBESA is one of six branches of the Entomological Society of America (ESA). Founded in 1889, ESA is the world's largest organization serving the professional and scientific needs of entomologists and individuals in related disciplines. It is comprised of more than 7000 members, who are affiliated with educational institutions, health agencies, private industry, and government. Members are researchers, teachers, extension service personnel, administrators, marketing representatives, research technicians, consultants, students, pest management professionals, and hobbyists.