Intrinsically disordered proteins lack a hydrophobic core, and have high densities of charged amino acid residues such as Lys, Arg, and Glu. Pro residues are also prominent, as they tend to disrupt ordered structures.

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#XL - R Botany

In elongation zone, cells elongate rapidly and undergo a final round of divisions to produce a central ring of cells called the endodermis

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#XL - R Botany

Feature of root

Most Vascular plants has two types of roots;

I. Primary Roots (Tap root) that grow downward

II. Secondary Roots that branch out to the side

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#XL - R Botany

I. Tap root system

A single, thick Primary root, called Taproot, with smaller Secondary Roots going out from the sides

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#XL - R Botany

I. Tap root system

Tap root system found in Dicot Plants.

e.g., Mustard, Pulses, Fiscus, Mango tree, Banyan

Families- Brassicaceae, Lamiaceae, Rutaceae, Fabaceae, Moraceae, Malvaceae, Apocynaceae, Compositae, Rosaceae, Cucurbitaceae, Leguminosae, Solanaceae etc.

#Id: 10716

#XL - R Botany

In monocotyledonous plants, the primary root is short lived and is replaced by a large number of roots called “Fibrous root system”

II.Fibrous root System

It develop from other than radicles

Many Small branching Roots, called fibrous root, but no large Primary root

The huge number of thread like roots increases the surface area for absorption of water and minerals

Fibrous root anchor the plant less securely

Fibrous root system

Fibrous root system found in Monocot Plants.

e.g., Maize, Paddy, Wheat, Grass, Onion

Families- Liliaceae, Poaceae etc.

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#XL - R Botany

Modification of root

Storage roots

Epiphytic or Aerial absorbing Roots e.g., Orchids.

Assimilatory roots

Respiratory roots or pneumatophores

Sucking roots or haustoria

Storage roots

Tap roots of carrot, radish, turnip and adventitious roots of sweet potato, dahlia get swollen and store food