Dictionary > Primary phloem

Primary phloem

The type of phloem derived from the primary meristem during the development of a vascular plant
The phloem is a vascular tissue that is responsible for translocation. Translocation pertains to the process that transports the photosynthate materials to different parts of a vascular plant. The phloem may be primary or secondary depending on which type of growth it came from or on which type of cambia (i.e. whether procambium or vascular cambium) it came from.
The primary phloem is a type of phloem that forms from the procambium during the primary growth. The primary growth is responsible for the growth in length in plants. The procambium is a meristematic tissue that enables the primary growth of a plant. Some of the cells produced by the procambium may become a component of the primary phloem (others as component of primary xylem, cork cambium, or vascular cambium). The primary phloem is made up of protophloem or metaphloem.
The primary phloem is located in the primary plant body parts. It occurs towards the periphery as opposed to the secondary phloem that forms inner to the primary phloem. The primary phloem lacks a radial system, which occurs in the secondary phloem. Comparing the primary phloem with the secondary phloem in terms of cellular components, the primary phloem has fewer phloem fibers, sieve tubes, and phloem parenchyma. Sclereids are also typically absent in the primary phloem.
See also:

You will also like...

Cell Respiration
Cell Respiration

Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

DNA molecule
Genetic Control – On and Off Genes

Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

An artistic depiction of a human embryo
Growth and Development of a Human Baby

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Electromagnetic spectrum of a brain
Sleep and Dreams – Neurology

While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

Chemical composition of the body
Chemical Composition of the Body

The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

Plant meristem
Plant Meristems and Growth

In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..