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A metabolomics-based approach for the evaluation of off-tree ripening conditions and different postharvest treatments in mangosteen (Garcinia mangostana)

Abstract

Introduction

Metabolomics is an important tool to support postharvest fruit development and ripening studies. Mangosteen (Garcinia mangostana L.) is a tropical fruit with high market value but has short shelf-life during postharvest handling. Several postharvest technologies have been applied to maintain mangosteen fruit quality during storage. However, there is no study to evaluate the metabolite changes that occur in different harvesting and ripening condition. Additionally, the effect of postharvest treatment using a metabolomics approach has never been studied in mangosteen.

Objectives

The aims of this study were to evaluate the metabolic changes between different harvesting and ripening condition and to evaluate the effect of postharvest treatment in mangosteen.

Methods

Mangosteen ripening stage were collected with several different conditions (“natural on-tree”, “random on-tree” and “off-tree”). The metabolite changes were investigated for each ripening condition. Additionally, mangosteen fruit was harvested in stage 2 and was treated with several different treatments (storage at low temperature (LT; 12.3 ± 1.4 °C) and stress inducer treatment (methyl jasmonate and salicylic acid) in comparison with control treatment (normal temperature storage) and the metabolite changes were monitored over the course of 10 days after treatment. The metabolome data obtained from gas chromatography coupled with mass spectrometry were analyzed by multivariate analysis, including hierarchical clustering analysis, principal component analysis, and partial to latent squares analysis.

Results

“On-tree” ripening condition showed the progression of ripening process in accordance with the accumulation of some aroma precursor metabolites in the flesh part and pectin breakdown in the peel part. Interestingly, similar trend was found in the “off-tree” ripening condition although the progression of ripening process observed through color changes occurred much faster compared to “on-tree” ripening. Additionally, low-temperature treatment is shown as the most effective treatment to prolong mangosteen shelf-life among all postharvest treatments tested in this study compared to control treatment. After postharvest treatment, a total of 71 and 65 metabolites were annotated in peel and flesh part of mangosteen, respectively. Several contributed metabolites (xylose, galactose, galacturonic acid, glucuronate, glycine, and rhamnose) were decreased after treatment in the peel part. However, low-temperature treatment did not show any significant differences compared to a room temperature treatment in the flesh part.

Conclusions

Our findings clearly indicate that there is a similar trend of metabolic changes between on-tree and off-tree ripening conditions. Additionally, postharvest treatment directly or indirectly influences many metabolic processes (cell-wall degrading process, sweet-acidic taste quality) during postharvest treatment.

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Acknowledgement

The authors thank Mr. Awang, Mr. Baesuni, Mr. Sulaiman, and Mr. Endang from Center of Tropical Horticultural Studies for the samples. This study represents a portion of a dissertation submitted by Anjaritha A.R. Parijadi to Osaka University in partial fulfillment of requirements for her Ph.D.

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Authors

Contributions

AARP designed the study, performed the metabolome analysis and data analysis, and drafted the manuscript. SPP participated in the design of the study, coordination, and writing of the manuscript. SR advised the selection of postharvest treatment and participated in the design of the study. FMD aided in data interpretation and participated in the design of the study. EF conceived of the study and participated in its design and coordination. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Sastia P. Putri.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animal performed by any of the authors.

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Informed consent was obtained from all individual participants included in the study.

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R. Parijadi, A.A., Ridwani, S., Dwivany, F.M. et al. A metabolomics-based approach for the evaluation of off-tree ripening conditions and different postharvest treatments in mangosteen (Garcinia mangostana). Metabolomics 15, 73 (2019). https://doi.org/10.1007/s11306-019-1526-1

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  • DOI: https://doi.org/10.1007/s11306-019-1526-1

Keywords

  • Mangosteen
  • Garcinia mangostana
  • Postharvest technology
  • Metabolic profiling
  • Gas chromatography–mass spectrometry