Topic 3 - Transport In Plants And Transpiration Flashcards
What are the 2 transport systems in flowering plants, and what do they transport
Xylem for water and inorganic ions
Phloem for organic molecules such as sucrose and amino acids
What is formed in the different systems by the vascular tissues
A central stele in the root
Peripheral vascular bundles in the stem
What do Vascular tissues form in the leaf
A central large vascular bundle from which smaller vascular bundles run through the leaf
What are xylem vessels
Cells found in the xylem that are responsible for the transport of water and ions
What is lignin
An impermeable substance to water, that prevent vessels from collapsing when under tension
What is the protoxylem, and what two patterns are found there
The first formed xylem, annular and spiral
Where is lignin found
In vessels inside the primary cell wall
What are the 4 different patterns of lignification in xylem vessels, and how are they different
Annular Spiral Reticulate Pitted They are the different ways the lignin is formed in xylem vessels
What is the metaxylem, and what 2 patterns are found there
The xylem found in the matured parts of the plants, reticulated or pitted
In the protoxylem, why are the patterns annular or spiral
These patterns allow the vessels to elongate along with other tissues in the growth regions
What are reticulated vessels
Vessels that are thickened by interconnecting bars of lignin
What are pitted vessels
Vessels that are uniformly thickened expect at pores seen as pits that allow rapid movement of water and ions out of vessels to surrounding cells
