Roots 1 Flashcards
Major functions of plant roots
anchoring the plant in the soil
absorption of water and nutrients
transport of water and nutrients to the rest of the plant body
where do roots originate
formed in the embryo as a radicle when initiated at the root apical meristem
2 main patterns for root organization
fibrous root and tap root
where do lateral roots develop
from the pericycle in response to chemical signals (plant hormones)
where do root hairs develop from
the epidermis
root hair function
increase root’s surface area for uptake of water and nutrients
where do adventitious roots develop from
from stems and leaves in stem cortical cells
roles of water in plant cells
structure (turgor)
cooling
photosynthesis
transport
apoplast
water movement outside the cell
symplast
water movement within the cell
how does water move cell to cell
apoplast and symplast
how does water move between organs (vascular tissue)
xylem and phloem
how does water move from environment to plant
water uptake and evaporation
cell types involved in water movement
vessel elements and tracheids (xylem) (V)
sieve tubes and companion cells (phloem) (V)
roots hairs (D)
guard cells (D)
endodermis (G)
roots are adapted to _______ water uptake
maximize