Water and Food Transport in Plants
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Transcript Water and Food Transport in Plants
Plant Physiology
1. Plant Parts a.k.a. Plant Organs
2. Plant Tissues
3. Water Transport
4. Food Transport
Water Transport
Xylem transports water and minerals from soil
through roots to tip top of plant
HOW???
osmosis through root hair
root pressure “pushes” water into xylem
water forms continuous narrow column due to
adhesion and cohesion properties of water
molecules
the loss of water due to transpiration (evapouration
of water through the stomata of the leaves) creates
a “pulling” force up the xylem
NO ENERGY IS REQUIRED
Water Transport
Guard Cells
Food Transport
Pressure – Flow Theory
sugars are pumped into phloem and move
down to root due to difference in water
pressure between the leaf and phloem
NO ENERGY IS REQUIRED
Food Transport