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Biol 17 2
(4) root modifications mary:
( A. ) all ove the above
Tendrils : Function in Support of vines
Spires : modified leaves - protection, pervent HIO Loss
`Stem takes over rule of' photosynthesis
3 tissue systems:"
Dermal - Outermost layer - 1St line of defense
4 epidermis + wax cuticle in non woody
Lo bark in woody plants .
Ground - tissue beneath dermal
vascular - W in ground tiss = HID + food transport
System btw root + Shout system .
" parenchyma tissue = most abundant tissue
- lange vaccle - takes up most of cell
_ retains ability to divide + become other cell types
. Coll enchyma = elongated my/ thickened uneven
cellulose wall - flexible + can grow up plant
Lo caus in clusters
Ly Provides flexible growth.
-- ex: celery plant = ridges are collenchyma cells
Syerenchyma: Composed of support cells
. thick secondary walls composed of Ligin
cells dead at maturity.
- Schleras = Short irregular Shaped & cells
up long, tapering, overlapping fibers
- plastic + alive.
~} Fibers elastic + dead - Lignified cell wall
Xylem Hiss = water transport call
- traineids = all vas . Plants - all lagging, done
-vessel events -common in thevening plants....
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- Summer '08
- Bacteria, spires