Chang-Dae Lee , Hnin Phyu Lwin , Neil Patrick Uy , Jinwook Lee , Sanghyun Lee
{"title":"Bulb size influences the quality and bioactive compound contents in cold-stored onion (Allium cepa L.) peels","authors":"Chang-Dae Lee , Hnin Phyu Lwin , Neil Patrick Uy , Jinwook Lee , Sanghyun Lee","doi":"10.1016/j.jspr.2025.102629","DOIUrl":null,"url":null,"abstract":"<div><div>This study evaluated the effects of bulb size on fresh weight, peel color attributes, and bioactive compounds in cold-stored onion peel tissues of onion (<em>Allium cepa</em> L.). Since cold storage is a crucial post-harvest step, understanding the impact of bulb size on bioactive compound retention is essential for maintaining onion peel quality. Onion bulbs were cultivated and stored in a temperature- and humidity-controlled system for five months, with evaluations conducted at monthly intervals. The results showed that onion peel lightness (<em>L</em>∗) and hue angle (<em>h</em><sup>o</sup>) were lower in large-sized bulbs compared to small-sized bulbs but peel chroma (<em>C</em>∗) was higher in large-sized bulbs. Onion peel color and hue angles were lower in the extra-large bulb than in the small bulb. The larger bulb was found to have lower levels of these compounds retained in them as compared to small bulbs. The contents of the bioactive compounds (protocatechuic acid, spiraeoside, and quercetin) in the peel tissues were generally lower in large bulbs compared to small bulbs during cold storage. Specifically, quercetin content was 1.52 mg/g DW in small bulbs but only 0.84 mg/g DW in large bulbs, while spiraeoside content decreased from 0.75 mg/g DW to 0.41 mg/g DW. Bulb fresh weight was negatively correlated with spiraeoside and quercetin contents. The findings of this study serve as a basis for quality control and the preservation of bioactive compounds in onion peel tissuees during cold storage. These insights can help the food industry and storage management optimize strategies to retain bioactive compounds in onion peels.</div></div>","PeriodicalId":17019,"journal":{"name":"Journal of Stored Products Research","volume":"112 ","pages":"Article 102629"},"PeriodicalIF":2.7000,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Stored Products Research","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022474X25000888","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This study evaluated the effects of bulb size on fresh weight, peel color attributes, and bioactive compounds in cold-stored onion peel tissues of onion (Allium cepa L.). Since cold storage is a crucial post-harvest step, understanding the impact of bulb size on bioactive compound retention is essential for maintaining onion peel quality. Onion bulbs were cultivated and stored in a temperature- and humidity-controlled system for five months, with evaluations conducted at monthly intervals. The results showed that onion peel lightness (L∗) and hue angle (ho) were lower in large-sized bulbs compared to small-sized bulbs but peel chroma (C∗) was higher in large-sized bulbs. Onion peel color and hue angles were lower in the extra-large bulb than in the small bulb. The larger bulb was found to have lower levels of these compounds retained in them as compared to small bulbs. The contents of the bioactive compounds (protocatechuic acid, spiraeoside, and quercetin) in the peel tissues were generally lower in large bulbs compared to small bulbs during cold storage. Specifically, quercetin content was 1.52 mg/g DW in small bulbs but only 0.84 mg/g DW in large bulbs, while spiraeoside content decreased from 0.75 mg/g DW to 0.41 mg/g DW. Bulb fresh weight was negatively correlated with spiraeoside and quercetin contents. The findings of this study serve as a basis for quality control and the preservation of bioactive compounds in onion peel tissuees during cold storage. These insights can help the food industry and storage management optimize strategies to retain bioactive compounds in onion peels.
期刊介绍:
The Journal of Stored Products Research provides an international medium for the publication of both reviews and original results from laboratory and field studies on the preservation and safety of stored products, notably food stocks, covering storage-related problems from the producer through the supply chain to the consumer. Stored products are characterised by having relatively low moisture content and include raw and semi-processed foods, animal feedstuffs, and a range of other durable items, including materials such as clothing or museum artefacts.