Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Influence of Sulfur Fertilization on Quality Characteristics and Antioxidant Activities of Onions during Storage at 4℃

유황처리가 4℃ 저장 중 양파의 품질 특성 및 항산화 활성에 미치는 영향

  • Jo, Hyeri (Department of Food and Nutrition, Kangwon National University) ;
  • Surh, Jeonghee (Department of Food and Nutrition, Kangwon National University)
  • 조혜리 (강원대학교 식품영양학과) ;
  • 서정희 (강원대학교 식품영양학과)
  • Received : 2016.07.11
  • Accepted : 2016.08.11
  • Published : 2016.12.31
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Abstract

Onions cultivated with (SY) or without (SN) sulfur application were stored for up to 36 weeks at $4^{\circ}C$ since harvest, after which they were analyzed for chemical composition and antioxidant activity in relation to sulfur (S) application and storage duration. Compared with SN onions, SY onions showed lower moisture and higher protein, soluble solids, and flavonoid contents at the time of harvest, and moisture and protein contents remained the same until 20 weeks of storage. However, soluble solids decreased while antioxidant activities, including flavonoids content, total reducing capacity, and superoxide dismutase (SOD)-like activity, appreciably increased as storage time increased to 20 weeks, which could be attributed to onion respiration and protective response to environmental stresses, respectively. There were abrupt decreases in flavonoid content and SOD-like activity at 36 weeks, presumably due to severe deterioration. Interestingly, all phenomena observed depending on storage time were independent of S application of onions. The results show that the critical factor influencing the chemical composition and antioxidant activity of onions during storage was postharvest storage duration rather than S application during onion cultivation.

본 연구에서는 유황양파를 수확한 이후 $4^{\circ}C$에서의 장기간 저장이 양파의 품질 특성과 항산화 활성에 미치는 영향을 탐색하고자 하였다. 수확 직후의 유황양파는 무첨가군에 비해 황과 질소가 유의적으로 높았으며, 탄수화물, 단백질, 조회분, 지방 등의 일반성분과 플라보노이드 등의 항산화 성분이 상대적으로 높은 경향을 나타내었다. 유황처리에 의한 양파의 이화학적 품질 특성 및 항산화 활성 개선 효과는 선행연구로부터 일관되게 보고되었으며, 재배 중 황 강화 때문에 양파의 성장 및 생합성 대사가 활성화된 결과로 해석되었다. 한편 유황처리 여부에 관계없이 양파는 저장 20주까지 비교적 수분함량을 일정하게 유지하였다. 또한, 저장 기간이 증가함에 따라 탄수화물과 수용성 고형분 함량은 감소하는 경향을, 플라보노이드, 총환원력, SOD 유사 활성 등 항산화 활성은 증가하는 경향을 보였다. 이는 수확 이후 환경변화에 대한 식물의 전형적 방어기전으로, 파이토알렉신, 이소플라보노이드 등의 스트레스 대사산물의 생성 촉진과 이에 필요한 에너지를 충당하기 위한 가속화된 호흡의 결과로 해석되었다. 한편 저장 36주에 이르러서는 양파에서 지나친 발아와 연부 현상이 관찰되었으며 항산화 활성도 급격히 감소한 것으로 평가되었다. $4^{\circ}C$에서 36주 동안 관찰된 저장 중 위 변화들은 유황처리 여부와 관계없이 비교적 동일하게 나타났다. 이는 재배 중 유황처리가 수확 직후 양파의 품질 특성 및 항산화 활성 개선에는 영향을 주었지만, $4^{\circ}C$ 저장 중 진행된 변화에는 저장 기간의 효과가 더 크게 관찰됨으로써 유황처리 효과가 미미하였음을 시사해주었다.

Keywords

References

  1. Albishi T, John JA, Al-Khalifa AS, Shahidi F. 2013. Antioxidant, anti-inflammatory and DNA scission inhibitory activities of phenolic compounds in selected onion and potato varieties. J Funct Foods 5: 930-939. https://doi.org/10.1016/j.jff.2013.02.005
  2. Shon MY, Choi SD, Kahng GG, Nam SH, Sung NJ. 2004. Antimutagenic, antioxidant and free radical scavenging activity of ethyl acetate extracts from white, yellow and red onions. Food Chem Toxicol 42: 659-666. https://doi.org/10.1016/j.fct.2003.12.002
  3. Food and Agriculture Organization of the United Nations Statistics Division (FAOSTAT). Production, Food Balance. http://faostat3.fao.org/download/Q/QC/E (accessed Jul 2016).
  4. Kwon E, Ryu D, Surh J. 2013. Quality characteristics of onions applied with methylsulfonylmethane (MSM) during cultivation. Korean J Food Sci Technol 45: 213-220. https://doi.org/10.9721/KJFST.2013.45.2.213
  5. Choi B, Surh J. 2013. Influence of the number of sulfur applications on the improvement of the chemical composition and quality of onions. Korean J Food Sci Technol 45: 478-487. https://doi.org/10.9721/KJFST.2013.45.4.478
  6. Yun JM, Surh J. 2014. Anti-inflammatory activity of onion juice prepared from sulfur-fertilized onions in high glucose induced human monocytes. Korean J Food Sci Technol 46: 773-777. https://doi.org/10.9721/KJFST.2014.46.6.773
  7. Brecht JK, Ritenour MA, Haard NF, Chism GW. 2007. Postharvest physiology of edible plant tissues. In Fennema's Food Chemistry. 4th ed. Damodaran S, Parkin KL, Fennema OR, eds. CRC Press, Boca Raton, FL, USA. p 975-1049.
  8. Sharma K, Assefa AD, Kim S, Ko EY, Park SW. 2014. Change in chemical composition of onion (Allium cepa L. cv. Sunpower) during post-storage under ambient conditions. N Z J Crop Hortic Sci 42: 87-98. https://doi.org/10.1080/01140671.2013.860039
  9. AOAC. 1990. Official methods of analysis of the AOAC Intl. 15th ed. The Association of Official Analytical Chemists, Washington, DC, USA. Method 984.13.
  10. Park H, Oyunzul G, Suh SW, Park YS, Jang JK, Chung MS, Choi YJ, Shim KS. 2009. Investigation of functional ingredients from onion according to the extraction methods, heat treatment, and storage period. Food Eng Prog 13: 92-98.
  11. Zhishen J, Mengcheng T, Jianming W. 1999. The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals. Food Chem 64: 555-559. https://doi.org/10.1016/S0308-8146(98)00102-2
  12. Kirby AJ, Schmidt RJ. 1997. The antioxidant activity of Chinese herbs for eczema and placebo herbs-I. J Ethnopharmacol 56: 103-108. https://doi.org/10.1016/S0378-8741(97)01510-9
  13. Singleton VL, Orthofer R, Lamuela-Raventos RM. 1999. Analysis of total phenols and other oxidation substrates and antioxidants by means of Folin-Ciocalteu reagent. Methods Enzymol 299: 152-178. https://doi.org/10.1016/S0076-6879(99)99017-1
  14. Chew YL, Goh JK, Lim YY. 2009. Assessment of in vitro antioxidant capacity and polyphenolic composition of selected medicinal herbs from Leguminosae family in Peninsular Malaysia. Food Chem 116: 13-18. https://doi.org/10.1016/j.foodchem.2009.01.091
  15. Eppendorfer WH, Eggum BO. 1992. Dietary fibre, sugar, starch and amino acid content of kale, ryegrass and seed of rape and field beans as influenced by S- and N-fertilization. Plant Foods Hum Nutr 42: 359-371. https://doi.org/10.1007/BF02194097
  16. Cazzato E, Laudadio V, Stellacci AM, Ceci E, Tufarelli V. 2012. Influence of sulphur application on protein quality, fatty acid composition and nitrogen fixation of white lupin (Lupinus albus L.). Eur Food Res Technol 235: 963-969. https://doi.org/10.1007/s00217-012-1817-5
  17. Sharma DK, Kushwah SS, Nema PK, Rathore SS. 2011. Effect of sulfur on yield and quality of potato (Solanum tuberosum L.). Int J Agric Res 6: 143-148. https://doi.org/10.3923/ijar.2011.143.148
  18. Kim SJ, Han D, Moon KD, Rhee JS. 1995. Measurement of superoxide dismutase-like activity of natural antioxidants. Biosci Biotechnol Biochem 59: 822-826. https://doi.org/10.1271/bbb.59.822
  19. Hong J, Kim HJ, Kim JY. 2011. Factors affecting reactivity of various phenolic compounds with the Folin-Ciocalteu reagent. J Korean Soc Food Sci Nutr 40: 205-213. https://doi.org/10.3746/jkfn.2011.40.2.205
  20. Salamal AM, Hicks JR, Nock JF. 1990. Sugar and organic acid changes in stored onion bulbs treated with maleic hydrazide. Hortscience 25: 1625-1628.