9.2 Transport in the phloem of plants

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DP IB Biology (09 Plant Biology) Mindmap am 9.2 Transport in the phloem of plants, erstellt von Steve Harton am 05/06/2014.
Steve Harton
Mindmap von Steve Harton, aktualisiert more than 1 year ago
Steve Harton
Erstellt von Steve Harton vor mehr als 10 Jahre
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Zusammenfassung der Ressource

9.2 Transport in the phloem of plants
  1. NATURE OF SCIENCE
    1. Developments in scientific research follow improvements in apparatus
      1. Measuring phloem transport rates
        1. Aphid stylets + radioactively-labelled CO2
    2. Plants transport organic compounds from sources to sinks
      1. Incompressibility of water allows transport along hydrostatic pressure gradients the source
        1. Active transport is used to load organic compounds into phloem sieve tubes at the source
          1. High concentrations of solutes in the phloem at the source lead to water uptake by osmosis
            1. Raised hydrostatic pressure causes the contents of the phloem to flow towards sinks
            2. Structure-function relationships of phloem sieve tubes
          2. Identification of xylem and phloem in microscope images of stem and root
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