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    Pre-storage putrescine application suppresses ethylene biosynthesis andretards fruit softening during low temperature storage in 'Angelino' plum

    117849_Pre%20Storage%20Enzyme.pdf (267.6Kb)
    Access Status
    Open access
    Authors
    Khan, Ahmad
    Singh, Zora
    Abbasi, Nadeem
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Khan, Ahmad and Singh, Zora and Abbasi, Nadeem. 2007. Pre-storage putrescine application suppresses ethylene biosynthesis andretards fruit softening during low temperature storage in 'Angelino' plum. Postharvest Biology and Technology. 46 (1): pp. 36-46.
    Source Title
    Postharvest Biology and Technology
    DOI
    10.1016/j.postharvbio.2007.03.018
    ISSN
    09255214
    Faculty
    School of Agriculture and Environment
    Department of Agribusiness and Wine Sciences
    Faculty of Science and Engineering
    School
    Department of Agribusiness
    Remarks

    The link to the journal's home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/503313/description#description

    Copyright © 2007 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/19682
    Collection
    • Curtin Research Publications
    Abstract

    To investigate the role of putrescine (PUT) in ethylene biosynthesis and fruit softening of plum (Prunus salicina Lindl. cv. Angelino), fruit on trees were sprayed 1 week before anticipated commercial harvest, or after harvest fruit were dipped in an aqueous solution containing different concentrations of PUT (0.0, 0.1, 1.0 and 2.0 mM), and 'Tween 20' (0.01%) as a surfactant. Following PUT treatments fruit were stored at 0 ± 1 °C and 90 ± 5% RH for 0, 3 and 6 weeks. Ethylene production, activities of 1-aminocyclopropane-1-carboxylic acid synthase (ACS) and 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) enzymes, and 1-aminocyclopropane-1-carboxylic acid (ACC) content, fruit firmness and activities of fruit softening enzymes including exo-polygalacturonase (exo-PG), endo-polygalacturonase (endo-PG), pectin esterase (PE) and endo-1,4-²-d-glucanase were estimated after 0, 3 and 6 weeks storage. Pre- and postharvest PUT application reduced ethylene production after 3 and 6 weeks of storage as compared to untreated fruit. Preharvest spray application of higher PUT concentrations substantially reduced ethylene production compared to lower PUT concentrations and postharvest PUT treatments. Activities of ACS enzymes and ACC contents during storage decreased with increased concentration of PUT applied irrespective of the methods of its application, both in skin and pulp tissues. Preharvest PUT-sprayed fruit exhibited lower ACO activities than postharvest PUT-treated skin and pulp tissues. The preharvest spray application of higher concentrations of PUT (2.0 and 1.0) significantly reduced the activities of fruit softening enzymes (exo-PG, endo-PG, PE and EGase) in skin and pulp tissues during storage. In conclusion, pre-storage application of PUT retarded plum fruit softening during low temperature storage through suppressed ethylene biosynthesis and reduced activities of fruit softening enzymes such as PE, EGase, exo and endo-PG in skin and pulp tissues.

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