Lutein content in sweetpotato leaves

Document Type

Article

Publication Date

1-1-2006

Abstract

Fresh leaves of 6 sweetpotato (Ipomoea batatas |L.| Lam.) genotypes, 'Beauregard', 'Bienville', L99-35, L00-8, L01-145, and L01-29, were characterized for lutein. Lutein is a carotenoid capable of delaying blindness-related macular degeneration. The content of lutein in sweetpotato ranged from 0.38 to 0.58 mg·g-1 fresh weight. Beta-carotene separated from lutein on high-pressure liquid chromatograms and when spiked in pure lutein extract did not interfere with lutein separation. High-resolution electrospray ionization mass spectrometric analysis was used to confirm the presence of lutein in sweetpotato leaves. Stems were also characterized and found not to contain lutein. Our results showed that sweetpotato leaves are an excellent source of dietary lutein and surpass levels found in leafy crucifers. Leaves of sweetpotato and a related species are human food in some countries and may be a major source of lutein for commercial purposes.

Publication Source (Journal or Book title)

HortScience

First Page

1269

Last Page

1271

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