Investigating the Seagrass Microbiome

By Karley Marie Lujan

Seagrass carpets the seafloor creating a unique and vital ecosystem in shallow marine environments. Sea turtles graze on seagrass leaves while smaller organisms seek refuge in the green fields but, on the microscopic level, seagrass is also home to microbial communities. Such microbes compose the seagrass microbiome and potentially play a role in seagrass ecology.

Turtle and seagrass

Sea turtles and other marine animals browse on seagrass meadows. (NOAA photo)

UC Davis graduate student Cassie Ettinger identifies and characterizes seagrass-associated microbial communities. A study published last year in the journal PeerJ suggests how understanding the role of these microbes could reveal new information about seagrass sulfur cycling and establish seagrass as a model organism.

Treating Koalas for Chlamydia Alters Gut Microbes

Koalas are one of Australia’s iconic animals, but they have been hard hit by an epidemic of Chlamydia infections contributing to a steep decline in numbers. Sick koalas brought to wildlife hospitals may be treated with antibiotics to clear up the chlamydia, but the antibiotics themselves can have severe side effects in the animals.

Koala

Koalas feed almost exclusively on eucalyptus leaves. They depend on gut bacteria to make the leaves digestible. (Photo via Tourism Australia)

A new study led by Katherine Dahlhausen, a graduate student at the UC Davis Genome Center, published in the journal PeerJ, shows that those antibiotics may be changing the balance of gut microbes thought to allow koalas to digest eucalyptus leaves.

Understanding How Rice Root Microbiome Can Promote Agricultural Growth

By Greg Watry

Your body plays host to a microbial ecosystem that’s ever-evolving, and its composition has implications for your overall health. The same holds true for plants and their microbiomes and the relationship is of pivotal importance to agriculture.

In a paper appearing in PLOS Biology, Joseph Edwards, ’17 Ph.D. in Plant Biology, Professor Venkatesan Sundaresan, Departments of Plant Biology and Plant Sciences and their colleagues tracked root microbiome shifts throughout the life-cycle of rice plants (Oryza sativa). The research could help inform the design of agricultural probiotics by introducing age-appropriate microbes that promote traits like nutrient efficiency, strong roots and increased growth rates in the plants.  

One Place Like Home: Space Station Has Same Microbes as Your House

By Carole Gan

UC Davis microbiologists have analyzed swabs taken by astronauts on the International Space Station – and found pretty much the same types of microbes as in a home on Earth, according to an analysis published today (Dec. 5) in the journal PeerJ.

The International Space Station is interesting to scientists studying the microbial ecology of buildings because it is a “building” with very few ways to bring microbes in or out.

Citizen science and Project MERCURRI

The work was part of Project MERCCURI, a collaboration between UC Davis and other organizations including Science Cheerleader, a group of current and former professional cheerleaders pursuing careers in science and math.

UC Davis Launches Cross-Campus Microbiome Initiative

By Ana Lucia Cordova-Kreylos

The UC Davis Office of Research this week (July 10) announced the launch of the Microbiome Special Research Program (SRP), designed to leverage and build upon the broad and deep expertise in microbiome science across the university.

“UC Davis has incredible breadth and depth in microbiome research with over 100 laboratories actively pursuing projects with links to agriculture, environment, energy and human and animal health,” said Cameron Carter, interim vice chancellor for research at UC Davis. “The decision to invest in a platform to empower these teams was obvious given our strength in these areas and our potential to charter new frontiers that address some of our world’s most pressing issues.”

Five Things You Probably Didn’t Know About the Soil Microbiome

By Lisa Howard

Soil Actually Has a Microbiome

Gut bacteria have been getting a lot of attention lately (yogurt, anyone?) but it turns out the soil in your own back yard is teeming with microbial life. According to Kate Scow, a professor of soil science and microbial ecology at UC Davis, a quarter teaspoon of soil can easily contain a billion bacterial cells. And she estimates there can be 10,000 to 50,000 different taxa of microbes in a single teaspoon. Soil is one of the most complex and diverse ecosystems on the planet, and it is one that is essential for human life through all the functions it provides: the breakdown of organic materials, food production, water purification, greenhouse gas reduction, and pollution cleanup, just to name a few.

Changes In Breast Milk Sugars Impact Babies’ Health And Growth

By Pat Bailey

A UC Davis-led study of nursing mothers in The Gambia shows how environment changes breast milk content

In a newly published study, UC Davis researchers and their colleagues, paint the picture of an elegant web of  cause-and-effect that connects climate, the breast milk of nursing moms, gut microbes and the health of breast fed infants.

The research is part of a long-running. cross-disciplinary project at UC Davis studying milk and its role in nutrition. For example, last year UC Davis scientists and colleagues at Washington University St. Louis worked with both children and animal models to show how milk compounds could alter gut microbe composition and affect health. UC Davis researchers also led a consortium to study the “milk genome,” the collection of all genes related to producing milk.