Document Detail


Effect of ethylene and 1-MCP treatments on strawberry fruit ripening.
MedLine Citation:
PMID:  20355099     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Strawberry is a soft fruit, considered as non-climacteric, being auxins the main hormones that regulate the ripening process. The role of ethylene in strawberry ripening is currently unclear and several studies have considered a revision of the possible role of this hormone. RESULTS: Strawberry fruit were harvested at the white stage and treated with ethephon, an ethylene-releasing reagent, or 1-methylcyclopropene (1-MCP), a competitive inhibitor of ethylene action. The effects of the treatments on fruit quality parameters and on the activity of enzymes related to anthocyanin synthesis and cell wall degradation were evaluated. Some aspects of ripening were accelerated (anthocyanin accumulation, total sugar content and increment of phenylalanine ammonia-lyase (PAL; EC 4.3.1.24) and beta-galactosidase (EC 3.2.1.23) activities), while others were repressed (chlorophyll levels and increment of endo-1,4-beta-glucanase (EC 3.2.1.4) and beta-xylosidase (EC 3.2.1.37) activities) or unchanged (reducing sugar content, pH, titratable acidity and alpha-L-arabinofuranosidase (EC 3.2.1.55) activity) by ethylene. 1-MCP treatment caused the opposite effect. However, its effects were more pronounced, particularly in anthocyanin accumulation, phenolics, PAL and polygalacturonase (EC 3.2.1.15 and EC 3.2.1.67) activities. CONCLUSION: These observations probably indicate that strawberry produces low levels of ethylene that are sufficient to regulate some ripening aspects.
Authors:
Natalia M Villarreal; Claudia A Bustamante; Pedro M Civello; Gustavo A Martínez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  90     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-09-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  England    
Other Details:
Languages:  eng     Pagination:  683-9     Citation Subset:  IM    
Affiliation:
Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús (IIB-INTECH; CONICET-UNSAM), B7130IWA Chascomús, Argentina.
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MeSH Terms
Descriptor/Qualifier:
Cyclopropanes / pharmacology*
Ethylenes / antagonists & inhibitors,  biosynthesis,  metabolism*
Fragaria / drug effects,  growth & development,  metabolism*
Fruit / drug effects,  growth & development,  metabolism*
Organophosphorus Compounds / pharmacology*
Plant Growth Regulators / biosynthesis,  metabolism*
Chemical
Reg. No./Substance:
0/Cyclopropanes; 0/Ethylenes; 0/Organophosphorus Compounds; 0/Plant Growth Regulators; 16672-87-0/ethephon; 3100-04-7/1-methylcyclopropene; 74-85-1/ethylene

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