Explain the primary root growth, Biology

Assignment Help:

Explain the Primary Root Growth?

Primary Growth in Roots :  Roots grow down and through the soil by adding new cells at the tip of the root (called the root tip). There is a group of cells called the apical meristem at the tip that actively divide by mitotic division to produce new cells to the inside of the root that will ultimately become the procambium, the ground meristem, and the protoderm. The apical meristem also cuts off cells to the outside of the root, which form a protective root cap. The root cap forms a protective barrier to shield the delicate meristematic tissue from the abrasive soil, sand and rocks through which the root must grow. The root cap even produces a polysaccharide jelly to lubricate the root as it glides through the soil.

1914_Primary Growth in Roots.png

There are 3 separate tissue regions that make up the root tip: the cells that undergo cell division, or the apical meristem tissues, are called the region of cell division; the area above the dividing cells in which the newly formed cells elongate, is referred to as the region of elongation; and the zone above that is called the region of maturation, where the cells develop ("differentiate") and become fully mature and functional.

The middle of the region of cell division is actually composed of cells that divide at a slower rate, and are therefore referred to as the "quiescent center." Cells that are produced in a direction towards the tip or front of the root form the root cap. As you might expect, the outer cells of the root cap get worn away and therefore require continual replacement by the apical meristem.


Related Discussions:- Explain the primary root growth

How are cnidarian characterized, Q. Cnidarian identity card. How are they c...

Q. Cnidarian identity card. How are they characterized according to instance of representing beings, basic morphology, kind of symmetry, germ layers and coelom, digestive system, r

Major objectives of diarrhoea, Q. Major objectives of diarrhoea? The ma...

Q. Major objectives of diarrhoea? The major objectives in the management of diarrhoea include: 1. Fluid and electrolyte replacement 2. Removal of cause (especially if inf

Treatment and disposal technologies for health-care waste, Q. Treatment and...

Q. Treatment and disposal technologies for health-care waste 1. Incineration 2. Chemical disinfection 3. Wet and dry thermal treatment 4. Microwave irradiation 5. L

Polypeptide chains of hemoglobin, Q. In sickle cell anemia, a hereditary di...

Q. In sickle cell anemia, a hereditary disease, there is replacement of one amino acid by another in one of the four polypeptide chains of hemoglobin. In this case are all of the s

Brain thinking, in what form brain stores thinking or past experiences?

in what form brain stores thinking or past experiences?

Behaviour change communication, Behavior means responses or reactions or ac...

Behavior means responses or reactions or acting in any situation. Change means act of changing or to become different or to modify. Behaviour Change can refer to any modifica

Define physiology cohesion and adhesion theory, Define Physiology: Cohesion...

Define Physiology: Cohesion & Adhesion Theory? Transport in Plants :  Transport of water, minerals and nutrients within vascular plants is dramatically different from animals

Seismic waves, Earthquake creates seismic waves that travel through and aro...

Earthquake creates seismic waves that travel through and around the surface of the earth. Seismic waves are the waves of energy caused by sudden breaking of rocks during an earthqu

What is the food processing, What is the Food Processing? Food processi...

What is the Food Processing? Food processing, as you learnt earlier, involves the conversion of raw materials and ingredients into an acceptable food product for the consumer.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd