BTNYFNLM51 Flashcards
is cable of absorbing nutrients from the soil and anchoring it down into the ground.
are not in green color and has no portion where leaves and flower buds will grow.
Roots -
Functions of the roots
1. It absorbs mineral and water from the soil.
2. It transports materials through vascular tissues – the xylem and phloem vein
3. It provides proper anchorage to the plant parts.
4. Some roots are under the process of photosynthesis like orchids. (except ground orchids)
5. Have the ability to store food and minerals. (Taro/gabi)
6. Some roots are for support and climbing.
Functions of the roots
1. It absorbs mineral and water from the soil.
2. It transports materials through vascular tissues – the xylem and phloem vein
3. It provides proper anchorage to the plant parts.
4. Some roots are under the process of photosynthesis like orchids. (except ground orchids)
5. Have the ability to store food and minerals. (Taro/gabi)
6. Some roots are for support and climbing.
ROOTS VS STEMS
1. Roots grow downward into the soil.
2. Roots are not differentiated into nodes and internodes.
3. Roots branches arise internally from the pericycle.
4. The root caps are the growing tip of roots
5. Roots consists of absorptive rootlets (Roots bear absoprtive root hairs close to the growing tip)
6. Roots do not produce dissimilar organs like leaves and flowers.
7. Do not have green pigments (except aerial orchids)
ROOTS VS STEMS
1. Roots grow downward into the soil.
2. Roots are not differentiated into nodes and internodes.
3. Roots branches arise internally from the pericycle.
4. The root caps are the growing tip of roots
5. Roots consists of absorptive rootlets
6. Roots do not produce dissimilar organs like leaves and flowers.
7. Do not have green pigments (except aerial orchids)
KINDS OF ROOTS SYTEM
has primary roots that will develop into a bigger and larger structure. (Examples: carrot, cassava, mahogany, radish, sugar beet)
has primary roots wchich has persisted and develops into one which is bigger, larger, and very conspicious structure in the root system.
penetrates deeply into the soil (allows better anchorage)
Tap Root System
KINDS OF ROOTS SYTEM
have many roots with the same sizes. The primary root is lost and replaced by the many adventitious roots growing from the bottom part of the stem. (ex: grass)
do not penetrate deeply into the soild. The place contains shallow soil and allows the plant for faster water and liquid absorbtion
Fibrous/ Diffuse Root System
KINDS OF ROOTS SYTEM
- roots that grow out from bulbs, rhizomes, tubes, margin of the leaves, and from cutting
Advantitious roots
SPECIALIZED OR MODIFIED ROOTS
– for climbing and support
(ex: hanging plant)
Aerial roots
SPECIALIZED OR MODIFIED ROOTS
the roots have the ability to manufacture foods through photosynthesis
tiger orchid, cattleya orchid
Photosynthetic roots –
SPECIALIZED OR MODIFIED ROOTS
– the bulb root penetrates deeper in the soil.
Contractile roots (bulb)
SPECIALIZED OR MODIFIED ROOTS
can store food like Irish potato and Sweet potato.
Storage roots –
SPECIALIZED OR MODIFIED ROOTS
roots are located on the stem such as sugar cane, corn and rubber tree
Prop roots –
SPECIALIZED OR MODIFIED ROOTS
– have a special structure known as haustoria. (sundrew, pitcherp plant, venus flytrap)
Parasitic roots
SPECIALIZED OR MODIFIED ROOTS
–the roots grow out from the trunk (Ex. tropical trees)
acacia
Buttress
Longitudinal Section of a Young Root
– a timble shaped mass of cells found at the lowest part of the root. The cells of the ___continuously broken down and renews constantly.
- easily destroyed due to its contact with the soil
Root cap region
Longitudinal Section of a Young Root
– the cells in this region are composed of small, cubical thin-walled with dense protoplasm.
The meristems at the apex are actively diving region which consists of three layers: dermatogen (outermost), periblem (inner layer-the cells mature into the cortex), and plerome (center region- the cells mature into stele)
Embryonic or Meristematic region
