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ASPHC Baner

Vol. 9 No. 2 (2010)

Articles

CONTENTS OF CERTAIN CHEMICAL COMPONENTS IN SHALLOT BULBS AFTER HARVEST AND LONG-TERM STORAGE

Submitted: January 20, 2021
Published: 2010-06-30

Abstract

Shallot is one of the vegetables, which are especially abounding in flavonoids, phenolic acids and other compounds with antioxidative properties. Among Allium vegetables it is also distinguished with good storage ability. The studies conducted in the years 2007–2009 included the assessment of dry matter, flavonoids and phenolic acid contents in shallot bulbs immediately after harvest and drying off, as well as after long-term storage (5 months in the temperature 0–1oC and humidity of 86%). The studies concerned 3 cultivars of shallot: ‘Ambition F1’, ‘Bonilla F1’ and ‘Matador F1’. The bulbs of these cultivars were obtained from seedlings planting. For chemical analyses bulb samples with the diameter of 25–30 mm were selected, as such constituted the greatest participation in the obtained yield. The contents of total and reducing sugars, flavonoids (converted into quercetin), as well as phenolic acids (converted into coffeic acid) were determined in fleshy scales, whereas in dry scales only the contents of flavonoids and phenolic acids were determined. The dry matter of fleshy scales in the examined shallot cultivars was on
average 16.65%. From among three examined cultivars the bulbs of ‘Bonilla F1’had significantly greater dry matter (18.03% on average). The contents of total sugars in shallot bulbs was on average 6.32% immediately after harvest and 5.71% after 5 months of storage. Similarly as in the case of dry matter, the bulbs of ‘Bonilla F1’ cultivar turned out to be the most abounding both in total and reducing sugars. The examined cultivars significantly differed in the contents of flavonoids and phenolic acids both in dry and fleshy scales. In all the cultivars the dry scales contained more than 50 times more flavonoids and more than 34 times more phenolic acids, as compared with fleshy scales. Long-term storage of shallot bulbs significantly affected the decrease of flavonoid contents, slight decrease of total sugars, but a significant increase of phenolic acids. From among the examined cultivars ‘Ambition F1’ was characterized with the lowest contents of all the analyzed components.

References

Arifin N.S., Miyajina I., Okubo H., 1999. Variation of pigments in the bulbs of shallot (Allium cepa var. ascalonicum) and Allium x wakegi. J. Fac. Agr. Kyushu Univ. 43 (3–4), 303–308.
Charłampowicz Z., 1966. Analizy przetworów z owoców, warzyw i grzybów. Wyd. Przem. Lekk. i Spoż., Warszawa.
Crozier A., Burns J., Aaziz A., Stewart A., Rabiasz H.S., Jenkins G., Edwards C.A., Lean M.E., 2000. Antioxidant flavonols from fruits, vegetables and beverages: measurements and bioavailability. Biol. Res. 33 (2), 96–114.
Farmakopea Polska [Polish Pharmacopoeia] V. 1999. Wyd. PTFarm Warszawa (In Polish).
Horbowicz M., 1999. Changes of the flavonols content in onion during the vegetation period and storage. Veg. Crops Res. Bull., 50, 81–91.
Horbowicz M., 2006. Wpływ przechowywania na zawartość kwercetyny w suszonej i mrożonej szalotce. Acta Agrobot. 59, 2, 175–182.
Horbowicz M., Kotlińska T., 2001. Changes of flavonols content during vegetation period and storage of shallot (Allium cepa var. aggregatum). Veg. Crops Res. Bull., 55, 81–90.
Jadczak D., Wójcik-Stopczyńska B., 2007. Influence of plant covering on some organic compound content and pungency of shallot grown for bunching harvest. Veg. Crops Res. Bull. 66, 25–30.
Jiang H., Ji B., Liang J., Zhou F., Yang Z., Zhang H., 2006. Comparison on the antioxidant capacity of selected fruits and vegetables and their separations. Chem. Natur. Compoun. 42, 4, 410–414.
Kotlińska T., 1995. Zróżnicowanie cech użytkowych populacji szalotki (A. cepa var. aggregatum). Mater. Konf. V Ogólnopol. Zjazdu Hod. Rośl. Ogrod. Skierniewice, 23–24 lutego 1995, 148–155.
Lachman J., Pronèk D., Hejtmánková A., Dudjak J., Pivec V., Faitová K., 2003. Total polyphenol and main flavonoid antioxidants in different onion (Allium cepa L.) varietes. Hort. Sci. (Prage), 30, 4, 142–147.
Leelarungrayub N., Rattanapanone V., Chanart N., Gebicki J.M., 2006. Quantitative evaluation of antioxidant properties of garlic and shallot preparations. Nutrition. 22, 266–274.
Ly T.N., Hazama C., Shimoyamada M., Ando H., Kato K., Yamauch R., 2005. Antioxidative compounds from the outer scales of onion. J. Agric. Food Chem. 53, 8183–8189.
Marinova D., Ribarova F., Atanassova M., 2005. Total phenolics and total flavonoids in Bulgarian fruits and vegetables. J. Univ. Chem. Technol. Metallurg. 40, 3, 255–260.
Mysiak B., Tendaj M., 2006. Content of flavonoids in some Allium species grown for green bunching. Veg. Crop Res. Bull. 65,105–110.
Ng A., Parker M.L., Parr A.J., 2000. Physicochemical characteristics of onion (Allium cepa L.) tissues. J. Agric. Food Chem. 48, 5612–5617.
Okubo H., Afrin N.S., Noriko M., 1999. Bulbing response of shallot (Allium cepa L. var. ascalonicum Backer) and Allium × wakegi Araki to daylength and temperature. 68 (2), 283–285.
Stratil P., Kleidus B., Kubán V., 2006. Determination of total content of phenolic compounds and their anioxidant activity in vegetables – evaluation of spectrophotometric methods. J. Agric. Food Chem. 54, 607–616.
Štajner D., Milić N., Čanadanović-Bruntel J., Kapor A., Štajner M., Popović M., 2006. Exploring Allium species as a source of potential medicinal agents. Phytother. Res. 20, 581–584.
Tangkanakul P., Auttaviboonkul P., Niyomwit B., Lowvitoon N., Charoenthamawat P., Trakoontivakorn G., 2009. Antioxidant capacity, total phonolic content and nutritional composition of Asian foods after thermal processing. I. Food Res. J., 16, 571–580.
Tendaj M., Mysiak B., 2008. Plon i jakość cebul szalotki uprawianej z siewu i rozsady. Now. Warz. 47, 25–31.
Tendaj M., Piusińska-Siedlecka M., 2002. The effect of growing methods on storage losses of shallot bulbs. Allium Improv. Newslet. 12, 12–14.
Tendaj M., Piusińska-Siedlecka M., 2005.. Wpływ fazy dojrzałości zbiorczej na jakość plonu cebul szalotki (Allium cepa L. var. ascalonicum Backer ). Annales UMCS, Sec. EEE, Horticultura, 15, 65–72.
Yang J., Meyers K.J. Heide J., Liu R.H., 2004. Varietal differences in phenolic content and antioxidant and antiproliferative activities of onion. J. Agric. Food Chem. 52, 6787–6793.

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