Vocab 1
a system of fluid filled tubes, vessels, or spaces, most commonly used for long distance transport in living organisms
What is a vascular system?
a tissue containing tubes called sieve tubes and other types of cell, responsible for the transport of organic solutes, such as sucrose throughout the plant
What is the Phloem?
Mass flow through the xylem is helped by the fact that water molecules are attracted to each other through hydrogen bonding (name that property)
What is cohesion?
This is transported through the xylem
What are water and mineral ions?
The two types of cells that are part of the phloem
What are sieve tube elements and companion cells?
a tissue containing tubes called vessels and other types of cell, responsible for the transport of water and mineral salts through the plant for support
What is the xylem?
a hard material made by plants and used to strengthen the cell walls of certain types of cell
What is lignin?
The water is also attracted to the cellulose and lignin in the walls of the xylem vessel elements, which are hydrophilic (name that property)
What is adhesion?
The overall movement of water in a plant is called this
What is transpiration?
These are between each sieve tube element
What are sieve plates?
the layer of cells surrounding the vascular tissue of plants
• It is most clearly visible in roots
What is the endodermis?
a pore in the epidermis of a leaf, bounded by two guard cells and needed for efficient gas exchange
What is stoma/stomata?
The material that makes the casparian strip block the apoplast pathway
Suberin
The parts of the cell wall where lignin could not be laid down (what is it called AFTER lignification)
What are the pits?
This element makes up sieve tube elements' cell walls
What is cellulose?
Plants that tend to have thick cuticles, curled leaves, leaf hairs, and reduced stomata
What is a xerophyte?
a dead, lignified cell found in xylem specialized for transporting water and for support
What is a xylem vessel element?
The pathway of water described as moving from cell to cell, making contact with inner cell contents (through plasmodesmata)
What is the symplast pathway?
The loss of water out of a leaf creates this
What is negative tension/lower water potential?
The active loading of sucrose into the phloem creates this
What is hydrostatic pressure?
a plant tissue consisting of thick walled cells with a purely mechanical function (strength and support)
What is Sclerenchyma?
a basic plant tissue typically used as packing tissue between more specialized structures
• it is metabolically active and may have a variety of functions such as food storage and support
What are parenchyma cells?
Sucrose and amino acids are an example of this
What are assimilates?
What are passage cells?
Pumped out of the companion cell using ATP, to bind with sucrose on a cotransporter
What are hydrogen ions?