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

Karyokinesis, At the beginning of the process in an animal cell, the partit...

At the beginning of the process in an animal cell, the partition of the centriole takes place, which has been duplicated during Interphase but were in the same centrosome. Bipol

Brain, How brain thinks?

How brain thinks?

What is the photoperiod, What is the photoperiod? The Photoperiod is th...

What is the photoperiod? The Photoperiod is the daily time period of light exposure of a living being and the photoperiod may differ according to the period of the year.

Functional difference between neurons and glial cells, Q. What are the func...

Q. What are the functional differences between neurons and glial cells? Neurons and Glial cells are the cells that form the nervous system. Neurons are cells that have the func

Limitation of eia, EIA suffers from following limitations: (i)     ELA s...

EIA suffers from following limitations: (i)     ELA should be undertaken at the policy and planning level rather than at the project level. (ii)   Range of possible alternati

Explain the issues related to food production, Explain the issues related t...

Explain the issues related to food production? Let us now understand some issues related to food production, these are: Factors influencing food production, Analysi

Phylum cnidaria (coelenterata ), PHYLUM  CNIDARIA (= COELENTERATA )       ...

PHYLUM  CNIDARIA (= COELENTERATA )         Definition and Introduction Tissue  grade eumetazoans with  a radial  symmetry .The  term  coelenterate  signifies the  presence

Reason of population growth, Some of the reason for increase in population ...

Some of the reason for increase in population is: 1.         Decline in death for an increase in life expectancy or longevity. 2.         Better medical facilities

What we need undergloves, Q. What we need Undergloves? These are a cott...

Q. What we need Undergloves? These are a cotton glove worn under the treatment glove for those operators experiencing discomfort to the skin on the hands. These must be replace

Define the coenzyme activity of nicotinic acid, Define the Coenzyme activit...

Define the Coenzyme activity of nicotinic acid? Nicotinamide exists within the redox-active coenzymes,  nicotinamide adenine dinucleotide (NAD) and its phosphate (NADP), which

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