Transport in the xylem Flashcards
What is lignin
a polymer that strengthens walls to prevent collapsing during low pressures
How does transpiration pull occur
and does transpiration pull require energy
what drives the process hint (environment)
The loss of water from the leaf results in a low pressure within the plant that creates an upwards suction called transpiration pull which is the upwards movement of water from the xylem
no
why do some plants have symbiotic relationships with plants
Some ions move slowly through the soil because they get stuck on soil particles. To overcome this problem, certain plants have developed symbiotic relationships with fungus
-fungus grow on the roots and absorb mineral ions (i.e.
phosphate) from soil particles and supply them to the roots. In return,
many plants roots then supply sugars and other nutrients to the fungus.
how is the water loss from the stomata repalced?
water from xylem
How does water climb stem
by transpiration pull through cohesion and adhesion
How does water travel into plant through roots
water passes into roots through osmosis due to active transport of minerals
once in root, water travels to the xylem vessels by passing through apoplast pathway or symplast pathway
role of adhesion and cohesion in plant
Adhesion allows water molecules to be attracted to the hydrophilic parts of xylem cell walls
cohesion allows water molecules to stick together
