Document Detail

Changes in carotenoid and ascorbic acid contents in fruits of different tomato genotypes related to the depletion of UV-B radiation.
MedLine Citation:
PMID:  15826075     Owner:  NLM     Status:  MEDLINE    
The aim of the present study was to investigate if the depletion of UV-B radiation affected the most representative carotenoids as well as the ascorbic acid content in tomato fruits, harvested at both breaker and firm red stages. To do this, three tomato genotypes, DRW 5981, HP 1, and Esperanza, were grown inside a greenhouse either covered with polyethylene transparent to UV-B or depleted of UV-B by a special covering film. The antioxidant properties of the fruits were evaluated on the water-insoluble fractions according to the ABTS method. UV-B effect on antioxidant activity was negligible in DRW and HP 1 genotypes, whereas it was detrimental in Esperanza at both ripening stages. This genotype seems to have a negligible capability of accumulating carotenoids and a great susceptibility to detrimental effects of UV-B; conversely, the DRW genotype shows high carotenoid levels under sunlight conditions and a further promotion by UV-B. On the other hand, the HP 1 mutant displays an intermediate behavior and represents the only genotype favored by UV-B with respect to ascorbic acid accumulation.
Deborah Giuntini; Giulia Graziani; Bartolomeo Lercari; Vincenzo Fogliano; Gian Franco Soldatini; Annamaria Ranieri
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  53     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-04-13     Completed Date:  2005-05-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3174-81     Citation Subset:  IM    
Dipartimento di Chimica e Biotecnologie Agrarie, Università di Pisa, via del Borghetto 80, 56100 Pisa, Italy.
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MeSH Terms
Antioxidants / analysis
Ascorbic Acid / analysis*
Carotenoids / analysis*
Fruit / chemistry*
Lycopersicon esculentum / chemistry*,  genetics*,  radiation effects
Ultraviolet Rays*
Reg. No./Substance:
0/Antioxidants; 36-88-4/Carotenoids; 50-81-7/Ascorbic Acid

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