• Login
    View Item 
    •   Mak IR Home
    • College of Agricultural and Environmental Sciences (CAES)
    • Academic submissions (CAES)
    • View Item
    •   Mak IR Home
    • College of Agricultural and Environmental Sciences (CAES)
    • Academic submissions (CAES)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Apple Peel Biochemical Changes after Foliar Application of Combined Boron and Calcium I. Phenolics and Physico-Chemical Attributes

    Thumbnail
    View/Open
    Mwije et al. 2020a (339.2Kb)
    Date
    2020-06-30
    Author
    Mwije, Anthony
    Lotze, Elmi
    Hoffman, E W
    Metadata
    Show full item record
    Abstract
    Post-full bloom foliar applications of boron in combination with calcium (B+Ca) suppress fruit sunburn-browning incidence in apples (Malusdomestica). However, the mode-of-action is not yet explained and hence, protocols to exploit this seemingly cost-effective peel physiology augmenting approach compared to usual methods (shade-netting, overhead cooling and kaolin application which attenuate excess fruit heat-load), cannot be fully developed or promoted justifiably among growers. Apple fruit sunburn-browning disorders are rampant worldwide, partly because of climate change as well as high cost and inefficacy of the established methods. However, knowledge of B+Ca effect on apple peel physiology may unravel the mode-of-action, paving the way for commercialization of this novel approach. In this study, B+Ca effect on apple peel phenolics and selected fruit physico-chemical attributes was investigated, using studies conducted at two farms for two seasons in Western Cape, South Africa. Four foliar treatments varying in B, Ca and inclusion of zinc (Zn), were applied on ‘Cripps Pink’, ‘Golden Delicious’ and ‘Granny Smith’ apples in 2014/15 (only ‘Cripps Pink’) and 2015/16 (all cultivars) in randomized complete block design experiments with five replications. Fruit peel samples for quantitative determination of total phenolics and total flavonoids analyses were collected at different fruit maturity stages. Significant (p < 0.05) interaction (treatments and fruit maturity stages) effect was observed for total phenolics (‘Golden Delicious’ and ‘Granny Smith’ only) and total flavonoids (all cultivars). Physico-chemical attributes (fruit diameter, size and total soluble solids) were only evaluated in ‘Golden Delicious’ and ‘Granny Smith’, and no significant differences among treatments occurred. Since no clear treatment differences in apple peel phenolic patterns were observed, other appropriate biochemical aspects like photosynthetic pigments should be investigated among such foliar B+Ca treatments.
    URI
    http://hdl.handle.net/10570/8068
    Collections
    • Academic submissions (CAES)

    DSpace 5.8 copyright © Makerere University 
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of Mak IRCommunities & CollectionsTitlesAuthorsBy AdvisorBy Issue DateSubjectsBy TypeThis CollectionTitlesAuthorsBy AdvisorBy Issue DateSubjectsBy Type

    My Account

    LoginRegister

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    DSpace 5.8 copyright © Makerere University 
    Contact Us | Send Feedback
    Theme by 
    Atmire NV