A taste test for blueberries

A PROJECT that aims to evaluate and maintain the quality of post-harvest blueberries using a novel technology for taste evaluation of fresh foods could determine the correct storage temperatures.

Tasmanian Institute of Agriculture student Sarah McKay is in the final year of a four-year Bachelor of Agricultural Science degree and presented her Honours project at the Honours Seminar.

For her project: “Evaluating Post-Harvest Shelf-Life, Quality Characteristics and Their Optimisation in Blueberry Fruit (Vaccinium spp.)”, Sarah has used an electronic tongue system (e-tongue) as well as several other instrumental methods and a human taste panel for comparison.

“My project is around maintaining and evaluating quality post-harvest through different storage conditions, mainly temperature and its influence on key quality characteristics of fresh blueberries over time,” Sarah said.
“The characteristics include colour, aroma and texture with emphasis on the influence the conditions have on taste profiles. The e-tongue is a piece of technology that has not been used extensively on fresh fruit, especially blueberries, so this is a major focus for my project,” Sarah said.

Sarah was one of 12 Honours year students who presented their final projects to live and online audiences, and the Australian Institute of Agriculture (AIA) for judging of the state Student Award, with the winner to represent Tasmania at the National Student Awards.

“The presentations are part of the students’ final assessment and provide an opportunity for industry engagement as students prepare to step into their professional careers,” Beth Penrose, Lecturer in Pasture Science and TIA’s Honours coordinator said.
“Most Honours projects at TIA are developed in collaboration with agri-food industries, and provide students with industry-specific knowledge, skills and networks that they can use as soon as they go into the workforce.
“Industry connections gained throughout the degree are vital to the success of students’ projects and contributes to the very high employability rate of TIA Honours graduates.
“The degrees taught by TIA in Agriculture, Agricultural Science and Microbiology all have a strong focus on hands-on experience and direct industry engagement to help make students job-ready as soon as they graduate.”

Sarah is hoping her project will see real-life applications in helping map consumer purchasing habits based on quality characteristics.

Industry collaboration and the skills and knowledge she’s gained from her Honours will soon be put to good use, as she has already accepted a graduate position at Hillwood Berries.

“I was lucky enough to work for Costa – who I developed this project with. Hands-on experience in the field within the horticultural sector is invaluable and will hopefully help me in future employment,” Sarah said.
“The best moment in my research would have to be getting to work with industry professionals to develop a project that would aid the industry in confirming and/or improving existing post-harvest blueberry storage methods.
“I hope this study can help aid industry in determining the correct storage temperature and storage period to maintain quality of a number of key blueberry varieties grown in Tasmania, as well as aid the industry in using alternative technologies such as the e-tongue to measure key quality characteristics during storage to map consumer acceptance and shelf-life based on these qualities.”

And for future agriculture science students, Sarah has some advice.

“Don’t be afraid to give something a go.”

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