Refereed journal article or data article (A1)

Non-targeted metabolite profiling highlights the potential of strawberry leaves as a resource for specific bioactive compounds




List of Authors: Kårlund A, Hanhineva K, Lehtonen M, McDougall GJ, Stewart D, Karjalainen RO

Publication year: 2017

Journal: Journal of the Science of Food and Agriculture

Journal name in source: Journal of the science of food and agriculture

Journal acronym: J Sci Food Agric

Volume number: 97

Issue number: 7

Number of pages: 9

ISSN: 0022-5142

eISSN: 1097-0010

DOI: http://dx.doi.org/10.1002/jsfa.8027


Abstract
The non-edible parts of horticultural crops, such as leaves, contain substantial amounts of valuable bioactive compounds which are currently only little exploited. For example, strawberry (Fragaria × ananassa) leaves may be a promising bioresource for diverse health-related applications. However, product standardization sets a real challenge, especially when the leaf material comes from varying cultivars. The first step towards better quality control of berry fruit leaf-based ingredients and supplements is to understand metabolites present and their stability in different plant cultivars, so this study surveyed the distribution of potentially bioactive strawberry leaf metabolites in six different strawberry cultivars. Non-targeted metabolite profiling analysis using LC/qTOF-ESI-MS with data processing via principal component analysis and k-means clustering analysis was utilized to examine differences and commonalities between the leaf metabolite profiles.\nQuercetin and kaempferol derivatives were the dominant flavonol groups in strawberry leaves. Previously described and novel caffeic and chlorogenic acid derivatives were among the major phenolic acids. In addition, ellagitannins were one of the distinguishing compound classes in strawberry leaves. In general, strawberry leaves also contained high levels of octadecatrienoic acid derivatives, precursors of valuable odour compounds.\nThe specific bioactive compounds found in the leaves of different strawberry cultivars offer the potential for the selection of optimized leaf materials for added-value food and non-food applications. © 2016 Society of Chemical Industry.\nBACKGROUND\nRESULTS\nCONCLUSION


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