9.2 Transport in the phloem of plants

Steve Harton
Mind Map by , created over 5 years ago

DP IB Biology (09 Plant Biology) Mind Map on 9.2 Transport in the phloem of plants, created by Steve Harton on 06/05/2014.

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Steve Harton
Created by Steve Harton over 5 years ago
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9.2 Transport in the phloem of plants
1 NATURE OF SCIENCE
1.1 Developments in scientific research follow improvements in apparatus
1.1.1 Measuring phloem transport rates
1.1.1.1 Aphid stylets + radioactively-labelled CO2
2 Plants transport organic compounds from sources to sinks
2.1 Incompressibility of water allows transport along hydrostatic pressure gradients the source
2.1.1 Active transport is used to load organic compounds into phloem sieve tubes at the source
2.1.1.1 High concentrations of solutes in the phloem at the source lead to water uptake by osmosis
2.1.1.1.1 Raised hydrostatic pressure causes the contents of the phloem to flow towards sinks
2.1.1.2 Structure-function relationships of phloem sieve tubes
2.2 Identification of xylem and phloem in microscope images of stem and root

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