How Do Plant Cells Grow?

All plant cells divide in the same way.
••• Thomas Northcut/Photodisc/Getty Images

Plants grow when the cells contained within them grow. This happens in one of two ways: The cells physically increase in size, or they divide and copy themselves. The processes of division and differentiation are both complex ones that allow cells to carry out the processes vital to the plant's health.

Cell Expansion

Cell expansion happens frequently in the roots of the plant.
••• Blue Jean Images/Digital Vision/Getty Images

Cell expansion occurs when an individual cell increases in size. The cell wall, the outermost part of the cell, holds everything together. When the cell expands, it can grow only as far as the cell wall stretches in order to keep the stability of the structures within. Not all plant cells expand in the same way; this type of growth is most commonly found in the roots and the tips of the plant's stems. It is generally believed that the expansion of cells occurs at a somewhat erratic pace, involving a change in the texture and strength of the wall and a period of expansion when the wall is at its weakest.

Cell Differentiation

Different cells develop different jobs.
••• Jupiterimages/Comstock/Getty Images

Plant cells also grow by a process called cell differentiation. All plant cells contain the same basic information and programming. As the plant matures, the cells in its roots begin to develop differently than the cells in the stem or leaves. All cells have the potential to serve in every capacity, and when exposed to different needs, the cells begin to express different characteristics.

Cells in the roots begin to reach toward nearby water and nutrients and form hair-like growths that allow them to absorb the nearby nutrients. Some of the most basic plant structures are those used for moving water to different parts of the plant. Xylem and phloem are tubes made up of dead cells, which more easily conduct water to the other parts of the plant.

Cell Division

Plant cells grow in number by cell division.
••• Jupiterimages/Photos.com/Getty Images

Cell division, or mitosis, is the process by which cells replicate and grow in number. Proteins join to the information contained in the plant's DNA and begin to separate the chromosome to copies of everything contained within the structure of the cell. When there are two copies, the cell wall will divide the two cells. These daughter cells are identical to the original cell, and each contains half of the final number of chomosomes, called chromatids. The growth process is complete only when each chromatid produces the other half of itself, becoming a full chromosome.

Vital Nutrients

Water is the essence of life and growth for plants.
••• Thomas Northcut/Photodisc/Getty Images

Plants require a number of things to survive, including water, nitrogen, potassium, sunlight and phosphorus. Water and phosphorus are the elements that aid mainly in cell expansion, for when taken into the cell, they help press the cell walls leading to expansion.

Phosphorus is also key in promoting cell growth in the processes of division and differentiation. It supplies the plant with energy needed to run various processes, including division and differentiation. Without phosphorus, there would be no fuel for replicating the contents of the cell or developing the specialized structures contained within. The other nutrients are less responsible for plant growth and more directly related to processes within plants such as the conversion of light to energy usable by the plant.

Related Articles

How Do Living Things Grow?
How Does Cytokinesis Differ in Plants & Animals?
How Does Duckweed Reproduce?
Three Reasons Why Cell Division Is Important
Living Cell Characteristics
Meiosis: Definition, Phases 1 & 2, Difference from...
What Is the Difference Between a Centriole & a Centrosome?
What Happens to a Cell If It Does Not Copy DNA Chromosomes...
When Do Chromosomes Duplicate During a Cell Life Cycle?
The Difference Between Anaphase, Interphase, Metaphase...
What Is the Goal of Mitosis?
G1 Phase: What Happens During this Phase of the Cell...
What Kind of Tissue Spends the Most Time in Interphase?
The Difference Between How Internal & External Regulators...
Which Types of Cells Divide by Mitosis & Cytokinesis?
What Are the Special Things That Happen When Cells...
How Do Plants Drink Water?
What Forms Across the Center of a Cell Near the End...

Dont Go!

We Have More Great Sciencing Articles!