Roots

Front 1

An organ of the plant that typically lies below the surface of the soil

Back 1

Roots

Front 2

Characteristics of a root

Back 2

-Root is the descending organ of plant and is usually non-green

-No distinct nodes and internodes

-Not bear leaf and buds

-Branches are endogenous in origin

-Root tip is protected by rootcap

-Root bears unicellular root hair

Front 3

Monocot root are mostly?

Back 3

Fibrous

Front 4

The outermost layer of the root, also called epiblema

Back 4

Epidermis

Front 5

Protects the underlying tissues of the root

Back 5

Epidermis

Front 6

Absorb water and dissolve ion along with root hairs

Back 6

Epidermis

Front 7

Consists of thin walled parenchymatous cells and rounded having intercellular spaces in them

Back 7

Cortex

Front 8

Allows for the diffusion of materials from the root hair.

Back 8

Cortex

Front 9

Stores foode reserve, specially starch

Back 9

Cortex

Front 10

Allows Transportation of salt and oxygen from root hair to the center of the root

Back 10

Cortex

Front 11

Facilitates the movement of water from cortex to xylem along with Casparian Strips

Back 11

Cortex

Front 12

Central part of the root

Back 12

Vascular Cylinder

Front 13

Inner part of the endodermis

Back 13

Pericycle

Front 14

Transport water and dissolved substances from roots to stem and leaves

Back 14

Xylem

Front 15

Main strengthening tissue of root

Back 15

Xylem

Front 16

Transport organic substances from the leaves to the roots

Back 16

Phloem

Front 17

Dicot root are mostly?

Back 17

Taproot

Front 18

Cortex difference

Back 18

Dicot-elongated

Monocot-wide

Front 19

Monocot/Dicot Xylem vs Phloem

Back 19

Monocot: alternate forming circle

Dicot: Xylem; x-like, Phloem; spaces of x

Front 20

Cap-like structure at tip of root, it covers and protect

Back 20

Root cap

Front 21

Lies beyond rootcap, growing point of root, region where cells divide

Back 21

Meristematic Zone

Front 22

Cells of this region are newly formwd cells and elongate rapidly, increase of root length

Back 22

Zone of Elongation

Front 23

Extended epiblema cells forming numerous unicellular root hair to increase the area of absorption for roots

Back 23

Root Hair Zone

Front 24

Cells are mature and form epidermis, cortex, and stele. Bears a number of root hair, absorb water and mineral salts.

Back 24

Zone of Differentiation

Front 25

Adventitious roots formed on above the ground surface of earth or water. Prop roots or anchor roots is their functions

Back 25

Aerial root

Front 26

Formed of prop root that develop board like growth on the upper side of the tree and assist with support of trunk against lateral forces. Serve as effective tension member to prevent uprooting

Back 26

Buttress roots

Front 27

A specialized thickened root that serves to pull down a rhizome, bulb, corm.

Back 27

Contractile Roots

Front 28

A specialized root system in which both primary and lateral roots are divided with equal diameters mostly are monocot

Back 28

Fibrous roots

Front 29

Store nutrient reserves, larger in diameter.

Back 29

Fleshy roots

Front 30

Penetrate in the host tissues for nutrient absorption. Tendency to suck the life of plants around them

Back 30

Haustorial roots

Front 31

Contains spongy parenchyma tissues of plants living in swampy soils

Back 31

Pneumatophorous roots

Front 32

Cluster of roots that arise from first few nodes of the stem obliquely into the soil and give support to plant

Back 32

Stilt root

Front 33

Roots are thick, soft and round in shape, they contain more tissue than most roots

Back 33

Tuberous roots

Front 34

Roots arising from branches and grow vertically downward into soil. These act as pillars and give mechanical support to aerial branches

Back 34

Prop root

Front 35

Primary root that grows downward into the ground. Creates a central root from which others develop

Back 35

Taproot

Front 36

Arise from nodes of stem and help plant with weak stem to climb

Back 36

Climbing roots

Front 37

Primary roots usually <2mm in diameter that have a function of water and nutrient uptake

Back 37

Fine roots

Front 38

Roots undergone secondary thickening and have a woody structure.

To transport and provide structure to connect the smaller diameter

Back 38

Coarse roots

Front 39

Form adventitious buds that develop into abovegrond shoots, termed suckers, which form new plants.

Back 39

Propagative roots

Front 40

Dense cluster of rootlets of limited growth that develop under low phosphate or low iron condition

Back 40

Storage roots

Front 41

Large roots that have undergone considerabke secondary thickening and provide mechanical support to woody plants

Back 41

Structural roots

Front 42

Close below the soil surface, exploiting water and easily available nutrients

Back 42

Surface root

Front 43

Root is broad and gradually tapered toward apex

Back 43

Conical

Front 44

The food gets accumulated only in the upper part to give it a top shape appearance

Back 44

Napiform

Front 45

The root is swollen in middle and taper towards the base and apex

Back 45

Fusiform

Front 46

Roots midified for N2 fixation. Observed in leguminous plants

Back 46

Nodulated Tap Root

Front 47

Aerial roots or aerophores produced in mangrove plants

Back 47

Pneunatopores or respiratory plants

Front 48

Factors affecting plant grow

Back 48

Macronutrients(N,K,Mg,Ca,P,S)

Micronutrients(Fe,Zn,Mn,B,Cl)

Water

Light

Temperature and relative humidity

CO2 and O2