Author
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FILGUEIRAS, HELOISA - EMBRAPA, BR |
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Wang, Shiow |
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DING, MIN - CDC, MORGANTOWN, WV |
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LU, Y. - CDC, MORGANTOWN, WV |
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MOURA, CARLOS - EMPRAPA, BR |
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Submitted to: International Symposium on Tropical and Subtropical Fruits
Publication Type: Abstract Only Publication Acceptance Date: 10/16/2003 Publication Date: 10/16/2003 Citation: Filgueiras, H., Wang, S.Y., Ding, M., Lu, Y., Moura, C. 2003. Antioxidant capacity of fruit from five new clones of acerola malpighia emarginata dc.. International Symposium on Tropical and Subtropical Fruits. P. 50. Interpretive Summary: Technical Abstract: Vitamin C content in ripe acerola (Malpighia emarginata DC) fruit can be 20 to 30 fold that of citrus. As it is believed that vitamin C, anthocyannins and phenolic compounds have the ability to scavenge free radicals in biological systems, and that cancer may be initiated by oxidative and free radical damage to DNA and cell. Fruits from five new clones of acerola were analyzed for the content of the above-mentioned compounds, as well as for their antioxidant capacity (umol Trolox Equivalent/g DW). Extracts of one of the clones were investigated for the effect on carcinogenesis related AP-1 and NF-kB transcription factors, induced by TPA or UVB. Although anthocyannin content detected in acerola (2.7 to 7.8 mg/100g FW) was much lower than that in the berry fruits, the phenolic contents were about three times as high (3300 to 4400 mg/100g FW), and vitamin C varied from 1100 to 1400 mg/100g FW according to the clone. Oxygen radical absorbance capacity (ORAC) values for acerola (239 to 383 umol TE/gDW) were also significantly higher than those for strawberry and blackberry fruits. Extracts (1g dry weight /19 ml ddH20) diluted 1:100 or 1:200 inhibited significantly the relative activity of AP-1 and NF-kB factors induced both by TPA and UVB. |
