Flashcards in Transport in Plants Deck (26):
What is the Xylem made up of?
Has : water proof walls lined with lignin, no end walls, pits with no lignin, no organelles, no cell content
What is the xylem function?
transport of water up the plant
How is Water moved?
The transpiration stream
What blocks the apoplast pathway?
What is the phloem made of?
sieve tube elements and companion cells
What surrounds the xylem and what does it do?
Parenchyma which acts as a food store
In the stem is the phloem on inside or outside?
In the root is xylem inside or outside?
In the leaves is xylem on bottom or top?
What is the phloem and xylem called?
What is phloem function?
Transport assimilates through translocation
What is the structure which acts a filter between sieve tube elements?
What joins sieve tube elements to companion cell?
What are the roles of water in a plant?
Turgor help cell expansion
Transport of minerals
How is root hair cell adapted for transport?
Thin surface layer
High concentration in cytoplasm so water move in
Which pathway moves through cytoplasm?
Where does the apoplast way move through?
Through cell walls by cohesive forces
How does water move through symplast pathway?
The increases water potential in adjacent cells creates movement of water
Which blocks journey from root hair cell to xylem?
The endodermal cells which have a casperian strip made of suberin
How do the endodermal cells create movement into xylem?
Use AT to pump ions into xylem to have high water potential
This can be shown by applying cyanide to root tip which inhibit mitochondria and therefor AT as root pressure dissapear
Describe movement into leaves?
The water evaporate from cell wall to air spaces
Stomata open so water diffuse out down gradient with
Describe one specialisation of phloem?
Has many mitochondria in companion cells
What features of a xerophyte reduce loss of water vapour?
Thick waxy cuticle
Reduced SA available for water loss
Hairs of epidermis as create humidity which reduces water potential gradient as there is a high water potential
What is a xerophyte?
A plant adpated to live in dry conditions
What is a hydrophyte
A plant adapted to live in wet conditions