DENDROLOGY

Detailed explanation-1: -The periderm is a protective tissue that is formed during secondary growth in the stems, branches and roots of most dycotyledons and gymnosperms.

Detailed explanation-2: -Periderm is known as the secondary dermal tissue. In older stems it replaces the roots of the plant. It helps in protecting from mechanical injury, diseases, heat, freezing, and desiccation.

Detailed explanation-3: -In woody plants, the epidermis of newly grown stems is replaced by the periderm later in the year. As the stems grow a layer of cells form under the epidermis, called the cork cambium, these cells produce cork cells that turn into cork.

Detailed explanation-4: -Dermal tissue is found covering the younger primary parts of a plant. These include leaves, roots, stems, flowers, fruits, and seeds. Plant parts that become woody no longer have dermal tissue as their outer layer because it is replaced by periderm, or cork.