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  Strawberry fruit FanCXE1 carboxylesterase is involved in the catabolism of volatile esters during the ripening process

Rivas, F., Blanco-Portales, R., Moyano, E., Alseekh, S., Caballero, J. L., Schwab, W., et al. (2022). Strawberry fruit FanCXE1 carboxylesterase is involved in the catabolism of volatile esters during the ripening process. Horticulture Research, 9: uhac095. doi:10.1093/hr/uhac095.

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 Creators:
Rivas, F.J.M.1, Author           
Blanco-Portales, Rosario2, Author
Moyano, Enriqueta2, Author
Alseekh, S.3, Author           
Caballero, Jose Luis2, Author
Schwab, Wilfried2, Author
Fernie, A. R.1, Author           
Muñoz-Blanco, Juan2, Author
Molina-Hidalgo, Francisco Javier2, Author
Affiliations:
1Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
2external, ou_persistent22              
3The Genetics of Crop Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_3244836              

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 Abstract: Volatile compounds produced during ripening of strawberry are key determinants of fruit quality and consumer preference. Strawberry volatiles are largely esters which are synthesized by alcohol acyltransferases (AATs) and degraded by carboxylesterases (CXEs). Although CXE activity can have a marked influence on volatile contents in ripe strawberry fruits, CXE function and regulation in them are poorly known. Here, we report the biochemical and functional characterization of the fruit receptacle-specific and ripening-related carboxylesterase FanCXE1. The expression of the corresponding gene was found to be antagonistically regulated by auxins and abscisic acid, key hormones that regulate fruit growth and ripening in strawberry. In vitro, FanCXE1 was able to hydrolyze artificial ester substrates similar to those produced by ripe strawberry fruits. Transient suppression of the FanCXE1 gene by RNAi resulted in an increase of important volatile esters such as methyl hexanoate, methyl butanoate and ethyl hexanoate as well as a decrease of the alcohols hexenol and linanool. The results of this work enhance our understanding of the molecular basis for volatile syntheses and facilitate production of better flavored strawberry fruits by introduction of the relevant alleles into common cultivars.

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Language(s): eng - English
 Dates: 2022-04-222022-07
 Publication Status: Published in print
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 Identifiers: DOI: 10.1093/hr/uhac095
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Title: Horticulture Research
  Alternative Title : Hortic Res
Source Genre: Journal
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Pages: - Volume / Issue: 9 Sequence Number: uhac095 Start / End Page: - Identifier: ISBN: 2052-7276