Abstract:
:Tomato flavor is dependent upon a complex mixture of volatiles including multiple acetate esters. Red-fruited species of the tomato clade accumulate a relatively low content of acetate esters in comparison with the green-fruited species. We show that the difference in volatile ester content between the red- and green-fruited species is associated with insertion of a retrotransposon adjacent to the most enzymatically active member of a family of esterases. This insertion causes higher expression of the esterase, resulting in the reduced levels of multiple esters that are negatively correlated with human preferences for tomato. The insertion was evolutionarily fixed in the red-fruited species, suggesting that high expression of the esterase and consequent low ester content may provide an adaptive advantage in the ancestor of the red-fruited species. These results illustrate at a molecular level how closely related species exhibit major differences in volatile production by altering a volatile-associated catabolic activity.
journal_name
Proc Natl Acad Sci U S Aauthors
Goulet C,Mageroy MH,Lam NB,Floystad A,Tieman DM,Klee HJdoi
10.1073/pnas.1216515109subject
Has Abstractpub_date
2012-11-13 00:00:00pages
19009-14issue
46eissn
0027-8424issn
1091-6490pii
1216515109journal_volume
109pub_type
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