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Title: Developmental Biology: Water and Resource Transport in Vascular Plants
Description: The two main vascular tissues are phloem, which carries food from the leaves to all parts of the plant, and xylem, which carries water and dissolved minerals from the roots to the leaves.
Description: The two main vascular tissues are phloem, which carries food from the leaves to all parts of the plant, and xylem, which carries water and dissolved minerals from the roots to the leaves.
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Water and Resource Transport in Vascular Plants
Measuring Water Potential
Consider a U-shaped tube with two arms separated by a
water-permeable membrane
...
H --> L
Addition of Solutes reduces water potential
...
Negative pressure reduces the potential of water
...
When a flaccid cell from an isotonic solution is exposed to a
higher solute concentration, the cell loses water and
undergoes plasmolysis
...
Water relations in plant cells
Turgor loss in plants causes wilting, which can be reversed
by watering the plant
...
The rate of water movement is most likely controlled by the
phosphorylation of the Proteins that contain aquaporins
...
The flow of molecules into and out of the protoplast is
directly regulated by the plasma membrane
...
In the majority of mature plant cells, the third largest
compartment is the central
A large organelle called a vacuole, which can occupy up to
90% or more of the size of the protoplast
...
The cell wall and cytosol are continuous from cell to cell in
the majority of plant tissues
...
Channels, or plasmodesmata, connect the cytoplasm of
adjacent cells
...
Water and Mineral Short DistanceTransport
Water and minerals can move through a plant in three
different ways:
Transmembrane route: from one cell to another, across a
cell wall
...
Title: Developmental Biology: Water and Resource Transport in Vascular Plants
Description: The two main vascular tissues are phloem, which carries food from the leaves to all parts of the plant, and xylem, which carries water and dissolved minerals from the roots to the leaves.
Description: The two main vascular tissues are phloem, which carries food from the leaves to all parts of the plant, and xylem, which carries water and dissolved minerals from the roots to the leaves.