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Posts Tagged: students

Trying leafy greens from a sweet potato plant

This time of year, it can be hard to resist the pull of sweet potatoes — roasted, mashed with butter, and topped with a combination of delectable treats from maple syrup to pecans to marshmallows. But did you know that the green leaves of the sweet potato plant also have the potential to be a tasty, nutritious food?

In Ethiopia, where sweet potatoes can be a staple crop, UC Davis graduate student Lauren Howe recently helped farmers taste test the leaves and consider this familiar crop in a new culinary light.

Watch a video to learn how to prepare sweet potato leaves:

The leaves of this drought-tolerant plant offer farming households there an alternative — and nutritious — food in the lean season, while they are waiting for its starchy, tuberous roots to be ready to eat. Introducing sweet potato leaves as a food option is intended to help farmers better diversify their families' diets, to include a wider variety of vegetables in addition to staple foods, especially during the dry season.

Lauren shared her experiences in Ethiopia on the Agrilinks website, where she recently won the Agrilinks Young Scholars blog contest with her writing and a short video from the field.

From right, Lauren Howe of UC Davis and Tesfaye Kassa of SACE interview farmers about how they currently manage sweet potato crops on their farms.

Boots on the ground with sweet potato farmers in Ethiopia

Lauren traveled to Ethiopia this summer to work with an organization called Send A Cow Ethiopia (SACE), on a Trellis Fund project. As part of the Horticulture Innovation Lab, each Trellis Fund project connects an organization in a developing country with a grad student from a U.S. university, to work together to benefit local farmers, while building the capacity of both the local organization and the student.

In Ethiopia, SACE helped Lauren better understand local contexts by connecting her with farming households to interview about their current farming practices and the role of sweet potatoes in their diets.

Later they traveled to meet with a group of about 25 farmers in the Ukara community to harvest leaves, cook together and discuss their perceptions of the leaves as a vegetable option.

“We are producing a huge amount of sweet potato per year," explained Feleke Lera, a son of farmers in Ukara. "But before, we had no knowledge about the leaves.”
 
Lauren harvests sweet potato leaves with farmers in Ukara.
 
In Ukara, the group prepared the sweet potato leaves three different ways – sauteed, cooked with corn or maize flour in a dish called fosese, and in a salad.
 

Reflecting on taste tests, new foods, and rural communities

After preparing and tasting the sweet potato leaves, the group in Ukara discussed which dish they preferred, whether they would adopt this new practice of eating sweet potato leaves, how this practice might affect their forage supply to feed their livestock, and what their friends and family members might think of this new food. 
 
"I deeply appreciated how food is truly a universal language and the preparation, cooking and act of eating itself are relatable across cultures," Lauren wrote in her blog post.
 

Lauren's own passion for food and witnessing how food can help build community is an important part of her reflection on this experience:

"This project is about creating tasty dishes to persuade people about the nutritional benefits of a new ingredient. It is gathering families, friends and neighbors to sit down to a communal meal (already a strong Ethiopian practice), breaking bread together, sharing stories, experiences and hopes for the future."

For more, go read the rest of Lauren's blog post and check out her short video too.

Lauren at a taste test in another community called Gurumo Koysha, where farmers overwhelmingly preferred the sautéed sweet potato leaves to the sautéed kale. The activity was intended to be a blind taste test, but Lauren reported that keeping the dishes secret was more difficult to do than originally planned.

Background and related international agricultural research

Lauren's experience with a Trellis Fund project in Ethiopia was supported by the Horticulture Innovation Lab, a research program led by Elizabeth Mitcham of the UC Davis Department of Plant Sciences, with funding from the U.S. Agency for International Development. With a focus on fruit and vegetable innovation, the Horticulture Innovation Lab seeks to empower smallholder farmers in developing countries to earn more income and better nourish their communities — as part of the U.S. government's global Feed the Future initiative.

Past research from the Horticulture Innovation Lab has focused on other leafy greens, specifically African indigenous vegetables, and also on sweet potatoes themselves (orange-fleshed sweet potatoes, that is). Though the program has not done in-depth research on sweet potato leaves for human consumption beyond this small Trellis Fund project, you can find more information about eating sweet potato leaves and tips in this bulletin from the University of Arkansas Cooperative Extension, and a wealth of information about sweet potato farming and gardening from the University of California Vegetable Research and Information Center. 

Related Food Blog posts:

 

Sweet potato leaves in Ethiopia - Horticulture Innovation Lab photo by Lauren Howe/UC Davis
Sweet potato leaves in Ethiopia - Horticulture Innovation Lab photo by Lauren Howe/UC Davis

close-up on sweetpotato leaves, stems and plant

Posted on Monday, November 19, 2018 at 9:02 AM
Focus Area Tags: Agriculture Health Innovation

Top honors go to UC Davis Plant Sciences students

Marcelo Moretti (left) and Rafael Pedroso (right) at the 2015 CWSS meeting

This is the second year that Rafael Munhoz Pedroso—a graduate student in Dr. Albert Fischer's lab—was awarded first place by the California Weed Science Society (CWSS) for his student oral research presentation. This year his research work...

L to R: Brim-DeForest, Mala, Moretti (back), Parry (front), Mosqueda, Pedroso
L to R: Brim-DeForest, Mala, Moretti (back), Parry (front), Mosqueda, Pedroso

2015 CWSS Student Research Paper and Poster award winners

Posted on Thursday, January 29, 2015 at 4:13 PM
Tags: announcement (222), students (10)

Students' olive-oil fraud buster wins international prize

The iGEM olive-oil biosensor inventors are, from left, James Lucas, Sarah Ritz, Simon Staley, Yeonju Song, Brian Tamsut and Lucas Murray. Not pictured here was team member Aaron Cohen. (Karen Higgins/UC Davis)
A student team composed of some of the best and brightest young minds at UC Davis took the grand prize last week in an international competition for the high-tech biosensor they created to detect low-grade or adulterated olive oil.

The award was presented to the Aggie inventors during the finals of the three-day global iGEM (International Genetically Engineered Machines) competition in Boston. The competition, this year featuring 245 teams from Asia, Europe, Latin America and North America, challenges student teams to design and build biological systems or machines and present their inventions in the international competition.

The students had spent several months designing and building the palm-sized biosensor, which they dubbed OliView. The biosensor is equipped to quickly and easily evaluate the chemical profile of oil, providing producers, distributors, retailers and ultimately consumers with an effective, inexpensive way to ensure olive oil quality.

Verifying olive oil quality is a concern for consumers – many of whom are willing to pay higher prices for the health benefits and flavor of true, extra-virgin olive oil. And honest olive oil producers want to prevent other producers from passing off sub-par olive oil as the real deal, while retailers, distributors and producers want a quick, easy way to ensure olive oil quality.

In addition helping detect fraudulent olive oil, the students' new biosensor will also monitor for good oil that may have gone rancid with age. 

The team of undergraduate students included Lucas Murray, Brian Tamsut, James Lucas, Sarah Ritz, Aaron Cohen and Simon Staley, with Yeonju Song serving as the “shadow” or alternate team member. You can tune into Aaron Cohen's recent Nov. 6 Science Friday interview during a discussion of synthetic biology.

The full story and a brief video about the new olive-oil biosensor and this stellar team of young inventors are available at: http://news.ucdavis.edu/search/news_detail.lasso?id=11076.

Reports on olive-oil quality are available at the web site of the UC Davis Olive Center at: http://olivecenter.ucdavis.edu/research/reports.

Posted on Wednesday, November 12, 2014 at 1:17 PM
  • Author: Pat Bailey
Tags: food (37), olive oil (10), students (10)

UC Davis tomatoes provide year-round healthful eating for college students

Chef Bob Walden, right, and Arnulfo Herrera, a cook, show off roasted tomatoes at UC Davis. (photo: Gregory Urquiaga / UC Davis)
Today's dorm food is far superior to the tasteless, over-processed foods of decades past. No more mystery meat or mushy vegetables. Campus dining services across the country are providing a diversity of fresher and healthier foods, much to the delight of food-savvy students who want variety, flavor, and nutritious choices. Well... being students, they don't always make the healthiest choices, but educational programs at campus dorms are turning the tide toward more-healthful eating.

At the same time, chefs and food buyers at universities, particularly the University of California, are selecting for high-quality fruits and vegetables, produced locally and sustainably. Universities with strong food sustainability programs are rightfully proud of what they're doing to educate students about food production, health, and nutrition. UC Davis Dining Services prioritizes the purchase of locally grown food (ideally within a 50-mile radius of campus). Most University of California campuses have similar programs.

At UC Davis, fresh roma tomatoes are picked each August from the 300-acre Russell Ranch, part of the campus's Agricultural Sustainability Institute, then processed within hours by campus Dining Services to provide year-round tomato sauce for pizza, pasta, and ratatouille. All told, 10,000 pounds of tomatoes are processed during a two-week period in August. About 29 percent of the total food served in the campus's residential dining halls is from local, organic or sustainable sources.

(courtesy photo: UC Davis Agricultural Sustainability Institute)
The tomatoes grown at Russell Ranch are part of a long-term academic research project that examines factors such as farming methods, irrigation needs, crop rotations, yield, and nutritional content. At the end of the growing season, some of the many tons of tomatoes are purchased by Dining Services at market value.

Emma Torbert, an academic coordinator at the UC Davis Agricultural Sustainability Institute, noted, “Connecting the food system to the research is really interesting. A lot of times there is confusion about where our food is coming from. The more people are educated, the more educated decisions they can make.”

Many UC Davis faculty and staff are so impressed with the food choices at the dorms that they purchase individual meal tickets and enjoy lunches made with the campus-grown tomatoes, herbs, and other vegetables, all of which are part of the daily food array. Public dinners are also offered periodically at the dorms so that community members can sit amongst students to taste and learn about the sustainability programs in the dorms.

Additional Information:

  • Video: Farm to Table, UC Davis Tomatoes; 2010
  • Slide show of this year's UC Davis tomato harvesting and processing system; 2014
  • Sustainable Foodservice Progress Report 2014, UC Davis Dining Services
  • Two videos of UC Davis students who work at the Student Farm to produce food, including one on tomato sauce production
  • “Tomatoes: Safe methods to store, preserve, and enjoy.” UC Agriculture and Natural Resources, free publication
Posted on Wednesday, August 27, 2014 at 11:11 AM

Plant science students earn top honors at UC Davis Weed Day

Fresno State students with Weed Day 2014 Chair Brad Hanson

From the Fresno State website⋅ Jul 18, 2014 ⋅ by Tom Uribes     A team of three Fresno State plant science students took first place in the weed identification category at the 58th annual Weed Day seminar hosted by University...

Posted on Wednesday, July 23, 2014 at 1:57 PM
Tags: announcement (222), students (10)

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