Lycopene accumulation affects the biosynthesis of some carotenoid-related volatiles independent of ethylene in tomato

Journal of Integrative Plant Biology
Hongyan GaoYunbo Luo

Abstract

For elucidating the regulatory mechanism of ethylene on carotenoid-related volatiles (open chain) compounds and the relationship between lycopene and carotenoid-related volatiles, transgenic tomato fruits in which ACC synthase was suppressed were used. The transgenic tomato fruit showed a significant reduction of lycopene and aroma volatiles with low ethylene production. 6-Methyl-5-hepten-2-one, 6-methyl-5-hepten-2-ol and geranylacetone, which were suspected to be lycopene degradation products, were lower than those in wild type tomato fruits. In order to identify whether lycopene accumulation effects the biosynthesis of some carotenoid-related volatiles independent of ethylene in tomato or not, the capability of both wild type and transgenic tomato fruits discs to convert lycopene into carotenoid-related volatiles was evaluated. The data showed that external lycopene could convert into 6-methyl-5-hepten-2-one and 6-methyl-5-hepten-2-ol in vivo, indicating that the strong inhibition of ethylene production had no effect on enzymes in the biosynthesis pathway of some carotenoid-related volatiles. Therefore, in ACS-suppression transgenic tomato fruits, the low levels of 6-methyl-5-hepten-2-one, 6-methyl-5-hepten-2-ol was due to de...Continue Reading

References

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Jan 25, 2002·Journal of Experimental Botany·Francisco FloresChristian Ambid
Sep 27, 2002·Journal of Experimental Botany·Lucille Alexander, Don Grierson
Sep 27, 2002·Journal of Experimental Botany·Peter M Bramley
Dec 4, 2003·Journal of Agricultural and Food Chemistry·Catherine Caris-VeyratVolker Böhm

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Citations

Jul 18, 2009·Biotechnology Letters·Ralf G Berger
Sep 5, 2020·Journal of Food Science·Raffaele RomanoAlessandra Aiello

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