| Title: | Metabolome and proteome of ethylene-treated papayas reveal different pathways to volatile compounds biosynthesis |
| Author(s): | Der Agopian RG; Fabi JP; Cordenunsi-Lysenko BR; |
| Address: | "Department of Food Science and Experimental Nutrition, University of Sao Paulo, Sao Paulo, SP, Brazil. Electronic address: robertaghedini@terra.com.br. Department of Food Science and Experimental Nutrition, University of Sao Paulo, Sao Paulo, SP, Brazil; Food Research Center (FoRC), Sao Paulo, Brazil. Electronic address: jpfabi@usp.br. Department of Food Science and Experimental Nutrition, University of Sao Paulo, Sao Paulo, SP, Brazil; Food Research Center (FoRC), Sao Paulo, Brazil. Electronic address: hojak@usp.br" |
| DOI: | 10.1016/j.foodres.2019.108975 |
| ISSN/ISBN: | 1873-7145 (Electronic) 0963-9969 (Linking) |
| Abstract: | "Papayas undergo fast postharvest changes triggered by the plant hormone ethylene. Some important pathways have been analyzed in limited studies (transcriptomics and targeted metabolomics); however, broad use of proteomics or untargeted metabolomics have not yet been used in papayas. In this study, two groups of green papayas (150 days after anthesis-physiological maturity for papayas) were treated with ethylene at different times (6 and 12 h) and their metabolic changes in fruit pulp were evaluated with untargeted metabolomics (general metabolites and volatile compounds) and proteomics. Polar metabolites exhibited distinct patterns, especially with regard to some amino and fatty acids during stimulated ripening. In particular, glutamate increased through a possible gamma aminobutyric acid (GABA) shunt and/or proteases activity. Moreover, the stimulated ripening altered the volatile compounds and the protein profiles. The results suggest that changes in membrane breakdown and the resulting oxidative processes could be responsible for volatile compound production, altering some sensorial qualities of papayas, such as pulp softening and the specific papaya linalool volatile compound increment. Thus, GABA levels could also be a strong biological marker for papaya development and ripening stages. This study applied two 'omic' techniques that provided insight into how the plant hormone ethylene could influence papaya postharvest quality" |
| Keywords: | "Carica/*chemistry Ethylenes/*pharmacology Fruit/drug effects/metabolism Gene Expression Regulation, Plant/drug effects Metabolome/*drug effects Proteome/*drug effects Volatile Organic Compounds/*metabolism Ethylene Metabolites Papaya fruit Proteins Pulp s;" |
| Notes: | "MedlineDer Agopian, Roberta Ghedini Fabi, Joao Paulo Cordenunsi-Lysenko, Beatriz Rosana eng Research Support, Non-U.S. Gov't Canada 2020/04/06 Food Res Int. 2020 May; 131:108975. doi: 10.1016/j.foodres.2019.108975. Epub 2020 Jan 3" |
