Phloem Transport of Resources

Christopher P. L. Grof, Caitlin Byrt, John W. Patrick

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    Abstract

    This chapter reviews the principles and concepts of resource transport in the phloem in general and then moves to describe the physiology of phloem translocation in sugarcane. The movement of resources through the phloem is interpreted through the Münch pressure flow hypothesis. The phloem transport rate is determined by magnitudes of pressure differences between the source and sink ends of the pathway and the phloem sap concentration of each transported nutrient. A description of the leaf structural framework in sugarcane is provided and the phloem pathways in sugarcane are dissected from loading of collection phloem in source leaves, transit through transport phloem, to release phloem where resources are unloaded into growth and storage sinks. Phloem conductivities in sugarcane, mechanisms of loading and unloading of solutes, and the environmental effects on phloem translocation are considered.
    Original languageEnglish
    Title of host publicationSugarcane: Physiology, Biochemistry, and Functional Biology
    EditorsPaul Moore and Frederik Botha
    Place of PublicationOxford, United Kingdom
    PublisherJohn Wiley & Sons, Inc.
    Pages267-306pp
    Volume1
    Edition1st
    ISBN (Print)9780813821214
    DOIs
    Publication statusPublished - 2014

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