Postharvest accumulation of resveratrol and piceatannol in sugarcane with enhanced antioxidant activity.
A new plant source, sugarcane, was used to produce the stilbenes piceatannol and resveratrol. Both stilbenes were identified in sugarcane billet stalks (12 mm) after incubation at room temperature for 3 days. Low concentrations of piceatannol (30.6 μg/g) and resveratrol (12.3 μg/g) were detected at day 3. At day 7 of incubation higher concentrations of piceatannol (1659 μg/g) and resveratrol (73 μg/g) were produced. Sugarcane juice obtained from billets that were incubated for 7 days contained high levels of piceatannol (8.5 mg/L) and resveratrol (1.2 mg/L). Although high stilbene concentrations were determined in the sugarcane variety L 97-128, two other varieties (Ho 95-988 and LCP 85-384) displayed lower stilbene concentrations after incubation for 7 days. The total phenolic content (TPC) and antioxidant activities of incubated sugarcane extracts were determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and ferric reducing antioxidant power (FRAP). The TPC and antioxidant activities were highest in sugarcane extracts that were incubated for 7 days. This study details a postharvest method to produce stilbene-enriched sugarcane with increased levels of piceatannol and resveratrol.
Southern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture , New Orleans, Louisiana 70124, United States.
Stephen M
SM
Boue
Betty Y
BY
Shih
Matthew E
ME
Burow
Gillian
G
Eggleston
Sarah
S
Lingle
Yong-Bao
YB
Pan
Kim
K
Daigle
Deepak
D
Bhatnagar
D000975:Antioxidants / Q000494:pharmacology*; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry; D000077185:Resveratrol; D031786:Saccharum / Q000737:chemistry / Q000378:metabolism*; D013267:Stilbenes / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology*; D013997:Time Factors
D000975:Antioxidants; D010636:Phenols; D010936:Plant Extracts; D013267:Stilbenes; C041525:3,3',4,5'-tetrahydroxystilbene; D000077185:Resveratrol