บทคัดย่องานวิจัย

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Cell wall changes in ripening nectarines from air and controlled atmosphere storage.

Lurie, S.; Greve, C.; Labavitch, J.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 204-208

1993

บทคัดย่อ

Cell wall changes in ripening nectarines from air and controlled atmosphere storage.

Changes in molecular size and neutral sugar composition of pectic fractions of nectarine fruits were measured during ripening at 20 deg C for 5 days after 8 weeks' storage at 0 deg in air or in a controlled atmosphere (CA) (10% CO2 and 15% O2). Firmness, extractable juice and mealiness [woolliness] were determined at harvest and during storage or ripening treatments. Cell wall material was extracted and pectic fractions were separated and analysed for uronic acid and neutral sugars. Fruits ripened after air storage were not juicy and developed mealiness compared with CA-stored fruits. Water soluble pectin increased during ripening, both after harvest or storage; fruits stored in air at 0 deg showed the smallest increase. The ratio of neutral sugars to uronic acids of this fraction decreased in fruits ripened after harvest or after CA storage, but not in fruits from air storage. CDTA-soluble pectin was 50% higher in fruits stored either in air or CA compared with fruits at harvest and decreased during ripening. Neutral sugar composition of the ripened air-stored fruits was 60% lower in arabinose and 20% higher in uronic acid than other treatments. Na2CO3-soluble pectin was the major pectic fraction from all treatments. In air-stored fruits which became mealy, the loss of arabinose from the Na2CO3 fractions during air storage may play a role in the lack of solubilization of this fraction during ripening.