Periderm Notes: Definitions & Explanations PDF | Download eBooks
Study Periderm lecture notes PDF with biology definitions and explanation to study What is Periderm?. Study periderm explanation with biology terms to review biology course for online degree programs.
Periderm Definition:
In woody plants, protective tissues called periderm replace the epidermis in older regions of stems and roots.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Periderm Notes:
Periderm is a secondary protective covering that forms on small woody stems and many non-woody plants, which is composed of cork (phellem), the cork cambium (phellogen), and the phelloderm. The periderm forms from the phellogen which serves as a lateral meristem. The periderm replaces the epidermis, and acts as a protective covering like the epidermis. Mature phellem cells have suberin in their walls to protect the stem from desiccation and pathogen attack. Older phellem cells are dead, as is the case with woody stems. The skin on the potato tuber (which is an underground stem) constitutes the cork of the periderm.
Keep Learning with Biology Notes
What are Photons?
A photon is a type of elementary particle which is basically the force carrier for the electromagnetic force, even when ...
What is Lytic cycle?
Lytic cycle is a type of life cycle of viruses in the host. The lytic cycle results in the destruction ...
What is Chemiosmosis?
Chemiosmosis is the movement of ions across a semipermeable membrane, down their electrochemical gradient and the process does not require ...
What is Insulation?
For mammals without hair, insulation is accomplished by blubber, a thick layer of fat tissue which helps to insulate an ...
What is Shared derived character?
A derived character is one that evolved in the lineage leading up to a clade and that sets members of ...
What is Pressure potential?
Unlike Ψs, Ψp can be positive or negative relative to atmospheric pressure. For example, when a solution is being withdrawn ...
