Blueberries Coated In Leaf Extracts Have Longer Shelf Life

An Oregon State University (OSU) researcher has helped discover a substance in blueberry leaves — which are usually wasted — that can be added to berry coatings, extending their shelf life while adding antioxidants.

Working with an international team of scientists in China, OSU food scientist Yanyun Zhao found that an edible coating containing blueberry leaf extracts helped delay decay and retain water, which slowed down their natural deterioration. The extra weight could also mean extra cash for growers, because blueberries are often sold by volume.

The natural coatings can allow fresh blueberries to be washed and prepared as ready-to-eat products. Most blueberries in stores are unwashed because rinsing them removes their natural waxy coating that preserves the fruit.

“Normally, blueberry leaves fall to the ground as waste,” said Zhao, a food science and technology professor in OSU’s College of Agricultural Sciences. “We’ve discovered a use that can change how the berries are stored, sold, as well as increasing their nutritional value.”

Blueberry leaves, which have been used as an herbal remedy, contain high levels of antioxidant phenolics — chemical compounds with antimicrobial properties that protect against fungi and bacteria, such as E. coli and Salmonella.

To create the coatings, researchers mixed these phenolic extracts with chitosan, a natural preservative that comes from crustacean shells. OSU tested coatings made from leaves that were picked at different stages of berry maturity, and leaf extracts were formulated into five different coating treatments based on varying levels of phenols.

Blueberries were dipped in the liquid coating and then dried at room temperature to form dried coatings. Nozzles can also spray the coatings on the surface of the berries as they pass by on a conveyor belt, according to Zhao, a value-added food products specialist with the OSU Extension Service.

Coating the blueberries will add to their cost, she said, although it’s unclear how much.

The research was conducted in collaboration with scientists in China, including Yun Deng, at Shanghai Jiao Tong University at the school’s Bor Luh Food Safety Center, and published in the journals of Food Control and Postharvest Biology and Technology.

Source: Oregon State University

Topics: , , ,

Leave a Reply

Berries Stories
Bacterial wilt symptoms on blueberry leaves
Berries
September 20, 2017
Getting to the Bottom of Bacterial Wilt in Blueberries
Prolific plant pathogen now presenting a new challenge for Florida producers and researchers. Read More
Berries
September 19, 2017
UC Davis Strawberry Lawuit Settled
Former university breeders to return any crosses that used unpatented varieties and agree the school owns rights to them. Read More
Berries
September 12, 2017
Longtime American Fruit Grower Columnist Charlie O’Dell Dies
“The Ole Crow,” as he called himself, passed away unexpectedly at home in Virginia at the age of 82. Read More
Berries
September 12, 2017
How to Match Drip Irrigation to Improve Berry Water Management
Using root mass diameter to appropriately determine wetting pattern will help you improve growth rate and yields. Read More
Raspberry bush at Wish Farms in Florida
Berries
August 31, 2017
Wish Farms Boosts Product Portfolio With Raspberries
Newest commodity to help company reach year-round supply goal, and help fuel consumer-focused marketing campaign. Read More
Berries
August 29, 2017
$8.8 Million Awarded to Support Strawberry Innovation
USDA recognizes that soil diseases are Enemy No. 1 for California strawberry growers. Read More
Berries
August 27, 2017
Looking Beyond Soil pH in Berries
Acidic soil is a foundation for blueberry growing, however the plant needs more than high pH to grow large, firm fruit. Read More
Berries
August 22, 2017
Columnist Wins Prestigious Plant Breeder Award
John Clark, who writes a column for American Fruit Grower® and Western Fruit Grower® magazines, is honored with National Plant Breeders Association Impact Award. Read More
Berries
August 3, 2017
Tips to Control Rodents in Drip-Irrigated Strawberries
Rodents are a major concern for all strawberry growers, including those with drip irrigation systems. Pests like pocket gophers, moles, Read More
Berries
August 1, 2017
New York Berry Crops Field Day Slated
Cornell University and a Rensselaer County farm partner to host a free workshop for commercial berry growers. Read More
Berries
July 2, 2017
Southern Highbush Berries Have Turned the Blueberry World Upside-Down
Berry industry revolutionized thanks to the introduction of low-chill varieties. Read More
Berries
July 1, 2017
Water is a Must for Berry Crops
As the adage goes, “ability is availability” as so it goes for water. Read More
Berries
June 27, 2017
Study Zeroes in on Sweet Spot for Florida Blueberries
Taste test proves farmers, marketers, and parents should be cognizant of kids’ consumer clout. Read More
Berries
June 20, 2017
Don’t Be Fooled By Rust in Your Brambles
Knowing whether you have orange rust disease or cane leaf rust is important for proper control methods. Read More
Apples & Pears
June 19, 2017
Bee-ware: New Resources Released for National Pollinator Week
New videos, webinars available during week-long observance. Read More
The Latest
Berries
September 26, 2017
Florida Blueberry Growers Challenged to …
After a nice rebound last season, resiliency is sure to be tested. Read More
Berries
September 26, 2017
Diversifying Berry Breeding, Public to P…
Both have advantages and should attract young people, especially with more so-called club varieties, as seen in apples. Read More
Berries
September 21, 2017
Ways Florida Blueberry Growers Can Eleva…
Promotional efforts seek to harness power that drives the Sunshine State's ‘little blue dynamos.’ Read More
Berries
September 20, 2017
Getting to the Bottom of Bacterial Wilt …
Prolific plant pathogen now presenting a new challenge for Florida producers and researchers. Read More
Berries
September 19, 2017
UC Davis Strawberry Lawuit Settled
Former university breeders to return any crosses that used unpatented varieties and agree the school owns rights to them. Read More
Berries
September 12, 2017
Longtime American Fruit Grower Columnist…
“The Ole Crow,” as he called himself, passed away unexpectedly at home in Virginia at the age of 82. Read More
Berries
September 12, 2017
How to Match Drip Irrigation to Improve …
Using root mass diameter to appropriately determine wetting pattern will help you improve growth rate and yields. Read More
Berries
August 31, 2017
Wish Farms Boosts Product Portfolio With…
Newest commodity to help company reach year-round supply goal, and help fuel consumer-focused marketing campaign. Read More
Berries
August 29, 2017
$8.8 Million Awarded to Support Strawber…
USDA recognizes that soil diseases are Enemy No. 1 for California strawberry growers. Read More
Berries
August 27, 2017
Looking Beyond Soil pH in Berries
Acidic soil is a foundation for blueberry growing, however the plant needs more than high pH to grow large, firm fruit. Read More
Berries
August 22, 2017
Columnist Wins Prestigious Plant Breeder…
John Clark, who writes a column for American Fruit Grower® and Western Fruit Grower® magazines, is honored with National Plant Breeders Association Impact Award. Read More
Berries
August 3, 2017
Tips to Control Rodents in Drip-Irrigate…
Rodents are a major concern for all strawberry growers, including those with drip irrigation systems. Pests like pocket gophers, moles, Read More
Berries
August 1, 2017
New York Berry Crops Field Day Slated
Cornell University and a Rensselaer County farm partner to host a free workshop for commercial berry growers. Read More
Berries
July 2, 2017
Southern Highbush Berries Have Turned th…
Berry industry revolutionized thanks to the introduction of low-chill varieties. Read More
Berries
July 1, 2017
Water is a Must for Berry Crops
As the adage goes, “ability is availability” as so it goes for water. Read More
Berries
June 27, 2017
Study Zeroes in on Sweet Spot for Florid…
Taste test proves farmers, marketers, and parents should be cognizant of kids’ consumer clout. Read More
Berries
June 20, 2017
Don’t Be Fooled By Rust in Your Brambles
Knowing whether you have orange rust disease or cane leaf rust is important for proper control methods. Read More
Apples & Pears
June 19, 2017
Bee-ware: New Resources Released for Nat…
New videos, webinars available during week-long observance. Read More