Question

What is the Phelloderm?

Answer 1

Hint: A part of the periderm made up of cells formed inwardly by the cork cambium is known as phelloderm.Phellem, also known as cork, is a tissue that grows on the outside of the phellogen or cork cambium.

Complete answer:
The epidermis of woody plants is gradually replaced by a thicker, protective layer known as bark. The bark protects these plants from water loss, mechanical injuries, and diseases by being their outermost layer. The periderm, brain, and phloem make up the periderm.

The periderm is made up of three layers: the outermost cork (also known as phellem), the middle cork cambium (also known as the phellogen), and the innermost phelloderm. The cork cambium divides mitotically to create new cells, which make up the cork and phelloderm layers. The phelloderm is made up of inwardly produced cells, while the cork is made up of outwardly produced cells. The phelloderm cells in angiosperms have thin walls (parenchymatous).

In contrast to cork cells that have been impregnated with suberin, they are not suberized. Furthermore, also at functional maturity, the phelloderm cells are still alive (not like the cork cells that turn into non-living cells). The phelloderm may be a single layer or a multilayer of cells, depending on the plant type. In certain plants, the phelloderm is referred to as the secondary cortex.

1.On the inner side of phellogen, phelloderm, or secondary cortex, is formed.
2. Phelloderm is a living tissue.
3. The cells are involved in food storage.
4. There is no suberisation.
Tannins are not present.
6. Small intercellular spaces are enclosed by the cells.
7. Phellogen is less active on the phelloderm side, resulting in less phelloderm formation than phellem.
8. There is no phellos failure.

Note: It may contain chlorophyll and serve as a defensive mechanism. The arrangement of these long-lived cells is identical to that of cortex cells. The number of cork and phelloderm layers varies greatly between species. Some plants don't contain phelloderm at all.