A basic understanding of
some major plant components will help you understand the causes behind
specific growth problems, and what precautions can be taken to solve them.
The vascular system is the 'plumbing' system
in a plant. It carries or “translocates”
throughout the plant. It is broken into 2 distinct sections.
This is responsible for:
- Translocating sugars to specific areas in
the plant to be either stored or used in the process of respiration (see
- Translocating starches that were stored in
roots and stems during dormancy.
- Translocating growth regulators and
This is used to translocate water, nutrients and oxygen from the roots to
the rest of the plant.
(See Fig 18.1) ‘Parenchyma' cells are cells
that photosynthesise. These are concentrated on the upper surface of the
'Stomata' are valves concentrated on the
underside of the leaf. These allow entry or exit of the following:
- Carbon dioxide, water and oxygen (during
photosynthesis and respiration).
- Foliar sprays such as fertilizers and
and phloem are located within the leaf for translocating water and
nutrients to the leaf cells and for the removal of sugars.
Roots facilitate the uptake of water, oxygen
Root ‘hairs’ are located close to the growing
tip of each root and are responsible for the majority of the uptake of
oxygen, water and nutrients. They are alive for just a few days and cover
about 10mm of a roots overall length at any given time. The uptake will be
greatly affected if the growth of root hairs is restricted.