roots and tissue Flashcards
Water moves between cells
Apoplast
pith in center, xylem and phloem alternate
Monocot root
zone of maturation
root hairs
water moves via plasmodesmata
symplast
vascular system
stele
parenchyma cells for storage
cortex
central core of xylem surrounded by phloem
dicot root
acts as a valve
casparian strip
long taproots
enlarged taproot
shallow fibrous roots near surface
desert roots
Apical meristem
zone of cell division
zone of elongation
zone of maturation
four zones of a young root
what are the four functions of a root
storage,
soil conduction of water and solutes
absorption of water and minerals
anchorage of plant in soil
a group of cells that store water
tissue
produces an increase in length of the plant
primary growth
produces an increase in girth (width) in plant
secondary growth
actively dividing cells producing primary growth
apical meristem
conducts water and minerals throughout plant
xylem
conducts sugar throughout the plant
phloem
veins, conducts water, minerals and sugar throughout plant
vascular tissue
cells that open and close, control air and gas exchange
guard cell
1 layer thick on outside of plant; protection
epidermis
storage, photosynthesis, flexible and rigid support, hard layers
ground tissue
tracheids + vessel elements
xylem
protection, absorption, gas exchange, shading
dermal tissue
sieve tube + companion cell (“the brains”)
phloem
