Quality and Aroma Production of Doyenne du Comice Pears in Relation to Harvest Date and Storage Atmosphere

Abstract

The effect of harvest date and storage atmosphere on quality and volatiles was investigated in Doyenne du Comice pears grown in the region of Lleida (NE Spain). Fruits were harvested at 2 dates (119 and 126 days after full bloom) and stored in regular air (RA) atmosphere (21% O2: 0.03% CO2) and in low oxygen (LO) atmospheres with two carbon dioxide concentrations: low CO2 (2% O2: 0.7% CO2) and high CO2 (2% O2: 5% CO2); the storage periods were 3, 5 and 7 months. After storage plus a shelf-life period (1 and 4 days at 20 C), flesh firmness, soluble solids content, titratable acidity and skin colour (parameter a* + b*) in the fruits were determined. Furthermore, volatiles production (ethylene and aroma) was determined at 4 days after storage. After 5 months, pears from regular air storage showed poorer quality than fruits held under low oxygen atmospheres. At 3 and 5 months of storage plus 1 and 4 days at 20 C fruit firmness was higher in LO when compared with RA-stored fruit, in both early- and late-harvested fruits. For long-term (7 months) storage high CO2 atmospheres permitted a good retention of fruit firmness and skin colour, but fruits stored in low CO2 achieved a quality more suitable for consumer acceptance (at the end of the shelf life period at 20 C). Differences between LO atmospheres were frequently not significant for soluble solids content and titratable acidity. The highest aroma production was obtained after 3 months of RA storage for early-harvested pears and after 7 months of LO-low CO2 storage for lateharvested fruits. Otherwise, LO-high CO2 had a depressing effect on total aromatic volatile production. Storage conditions and the period of ripening at 20 C influenced the occurrence of individual esters and alcohols.

Keywords

Pyrus communis pear Doyenne du Comice harvest ripening controlled atmosphere aroma volatiles ethylene

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References

Ackermann J. , Fischer M. and Amado R. (1992). Changes in sugars, acids and amino acids during ripening and storage of apple (cv. Glockenapfel). Journal of Agricultural and Food Chemistry 40: 1131–1134.

Brackmann A. , Streif J. and Bangerth F. (1993). Relationship between a reduced aroma production and lipid metabolism of apples after long term controlled atmosphere storage. Journal of the American Society Horticultural Science 118: 243–247.

Eccher P. , Balzarotti R. , Rizzolo A. and Spada G.L. (1993). Effect of picking date on quality and sensory characteristics of pears after storage and ripening. Acta Horticulturae 326: 291–298.

Elgar H.J. , Watkins C.B. , Murray S.H. and Gunson F.A. (1997). Quality of Buerre Bosc and Doyenne du Comice pears in relation to harvest date and storage period. Postharvest Biology and Technology 10(1): 29–37.

Fellman J.K. , Mattinson D.S. , Bostick B.C. , Mattheis J.P. and Patterson M.E. (1993). Ester biosynthesis in ‘Rome’ apples subjected to low-oxygen atmospheres. Postharvest Biology and Technology 3: 201–214.

Garcia J.M. and Streif J. (1993). Quality and storage potential of pears. I. Influence of controlled atmosphere and ultra low oxygen storage conditions. Gartenbauwissenschaft 58(1): 36–41.

Hansen K. , Poll L. , Olsen C.E. and Lewis M.J. (1992). The influence of oxygen concentration in storage atmospheres on the post-storage volatile production of ‘Jonagold’ apples. Lebensmittel-Wissenschaft Technologie 25: 457–461.

Ke D. , Yahia E. , Mateos M. and Kader A. (1994). Ethanolic fermentation of ‘Bartlett’ pears as influenced by ripening stage and atmospheric composition. Journal of the American Society for Horticultural Science 119(5): 976–982.

Leblond C. (1983). Recherches recentes sur la conservation des poires Doyenne du Comice du Val de Loire. In: XVI Congre`s International du Froid, Paris (IIF), Comptes Rendus Tome III, pp. 215–219.

10.

López M.L. , Lavilla M.T. , Recasens I. , Riba M. and Vendrell M. (1998). Influence of different oxygen and carbon dioxide concentration in storage on volatile production by Starking Delicious apples. Journal of Agricultural and Food Chemistry 46: 634–643.

11.

López M.L. , Lavilla M.L. , Recasens I. , Graell J. and Vendrell M. (2000). Changes in aroma quality of ‘Golden Delicious’ apples after storage at different oxygen and carbon dioxide concentrations. Journal of the Science of Food and Agriculture 80: 311–324.

12.

Mattheis J.P. , Buchanan D.A. and Fellmann J.K. (1995). Volatile compound production by ‘Bisbee Delicious’ apples after sequential atmosphere storage. Journal of Agricultural and Food Chemistry 43: 194–199.

13.

Rizzolo A. , Sodi C. and Polesello A. (1991). Influence of ethylene removal on the volatile development of ‘Passa Crassana’ pears stored in controlled atmosphere. Food Chemistry 42: 275–285.

14.

Roelofs F.P.M.M. , Hermon E.A.-van and van-Hermon E.A. (1994). Scrubbed CA-storage of Doyenne du Comice. CA-storage improves the quality, but does not lengthen the storage life. Fruitteelt-Den-Haag 84(36): 12–13.

15.

Schwarz A. (1990). Trial of cold storage of pears in controlled atmospheres. II. Doyenne du Comice. Revue Suisse de Viticulture, d’Arboriculture et d’Horticulture 22(4): 265–267.

16.

Streif J. and Bangerth F. (1988). Production of volatile aroma substances by ‘Golden Delicious’ apple fruits after storage for various times in different CO2 and O2 concentrations. Journal of Horticultural Science 63: 193–199.

17.

Suwanagul A. and Richardson D.G. (1998). Identification of headspace volatile compounds from different pear (Pyrus communis L.) varieties. Acta Horticulturae 475: 605–622.

18.

Takeoka G. , Buttery R. and Flath R.A. (1992). Volatile constituents of Asian Pear (Pyrus Serotina). Journal of Agricultural and Food Chemistry 40: 1925–1929.