PLANT ORGANS Flashcards
1
Q
PLANT ORGANS
A
Roots
Stem
Leaves
Flower
Seeds
Fruits
2
Q
– Protects the tender apex (absent in aquatic plants)
A
- Root cap
3
Q
- 1 to few mm above the root cap; have small cells with thin walls, dense with protoplasm; undergo repeated cell division (meristematic region)
A
Region of cell division –
4
Q
- – lies above meristematic region; extends to 1-5 mm; undergo rapid elongation and enlargement; responsible for growth in length of the root
A
Region of elongation
5
Q
*– lies above meristematic region of elongation, this region produces root hairs .
A
Region of maturation
6
Q
Types of Roots
A
- Tap root system
- Adventitious root system
- Fibrous Root system
- Foliar root system
7
Q
- Primary root grows vertical downward
- Branches grows downward or horizontally outwards
- Most of dicots plants have taproot system
Functions: Absorb water, mineral, salts from soil and anchorage
A
- Tap root system
8
Q
- Roots that grow from any part of the plant other than radicle.
- Those roots formed on stem and leaf cuttings and those produced by air layering.
A
Adventitious root system
9
Q
- Opposite of taproot system
- In monocots (with all adventitious roots)
A
Fibrous Root system
10
Q
- From leaves mainly petiole or vein (spontaneous or due to injury)
- Examples are begonia
A
- Foliar root system
