Study Set Content:
The fibrous root system consists of ?
Several adventitious roots of approximately equal size that arise from the base of the stem
Many mature plants develop have a combination of taproot and fibrous root system? T or F
T
Root hairs does not increase the total surface of the root? T or F
F
What kind of roots does dicot have
Taproots, with occasionally one or more primary roots from which the secondary roots develop
What kinds of roots does monocotyledon plants have?
Fibrous root systems
Adventitious and other types of roots may develop in both monocot and dicot. T or F
T
How many are their regions of roots
4
How many root zones are not sharply defined in their boundaries
3
The cells of each region gradually develop the form of those in the next region. T or F
T
What are the 4 root regions
Root Cap, Region of Cell Division, Region of Elongation, and Region of Maturation
A covering of root cells over the root tip that protects the delicate meristematic tissue directly behind it
Root Cap
Root caps are composed of
thimble-shaped mass of parenchyma cells covering the tip of each roots
Function of Root Caps
Protect from damage of the delicate tissue behind it
Young root tip often pushes through?
angular and abrasive particles
No equivalent in stems
Root Caps
what part of root caps outer cells secrete and release a slimy substance that lodges in the walls and eventually passes to the outside?
The dictyosome or Golgi apparatus
What facilitates the root tips movement through the soil
Mucilaginous lubricant
provides a medium favorable to the growth of beneficial bacteria that add to the nitrogen supplies available to the plant
mucilaginous lubricant
It grows randomly instead of more or less downward-perception of gravity
Root Cap
Plastids that contain starch grains.
Amyloplasts
