The antioxidative function of lutein: electron spin resonance studies and chemical detection

Functional Plant Biology : FPB
Chang-Lian PengCheng-Xue Zhao

Abstract

In the present study, both electron spin resonance (ESR) and chemical detection confirmed that lutein [extracted from alfalfa (Medicago sativa L.)], the most abundant xanthophyll in thylakoids of chloroplasts, could serve as an antioxidant to scavenge reactive oxygen species (ROS) in vitro. Lutein exhibited a greater capacity for scavenging hydroxyl (OH·) and superoxide (O2·-) radicals than β-carotene at the same concentration, whereas the opposite trend was observed in the capacity for scavenging singlet oxygen (1O2). The capacity of lutein for scavenging ROS from high to low is OH· > O2·- > 1O2. We hypothesise that lutein plays an important photoprotective role in scavenging O2·- and OH· under severe stress. This hypothesis is consistent with our previous report that the lut2 (lutein-deficient) Arabidopsis mutant is more susceptible to damage than the npq1 (lutein-replete but violaxanthin de-epoxidase-deficient) Arabidopsis mutant under severe stress during exposure to high light intensity at low temperature (Peng and Gilmore 2003).

References

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Citations

Dec 2, 2009·Physiologia Plantarum·Xue-Qin ZengChang-Lian Peng
Nov 14, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Shizue MatsubaraBarry Osmond
Sep 1, 2007·Functional Plant Biology : FPB·Jose I García-PlazaolaC Barry Osmond
Feb 11, 2015·Food & Nutrition Research·Maria Alessandra GammoneNicolantonio D'Orazio
Feb 6, 2020·Physiologia Plantarum·Águeda M González-RodríguezBeatriz Fernández-Marín

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Methods Mentioned

BETA
ESR
AsA

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