EVERYDAY SCIENCE

Detailed explanation-1: -The cork cambium is a lateral meristem that is responsible for secondary growth in roots and stems that replaces the epidermis. The meristematic cell layer responsible for the development of the periderm is known as phellogen.

Detailed explanation-2: -Note: A water-resistant bark that arises due to the activity of the ‘cork cambium’ or the ‘phellogen’ is known as the cork tissue. It is a lateral tissue. It helps in the formation of the ‘secondary tissue’ that replaces the shoot and the root. It is primarily made by the ‘parenchyma cells.

Detailed explanation-3: -Phellogen also called cork cambium helps in secondary growth in extra stelar region. It grows both inwards and outwards giving rise to cork cells and secondary cortex respectively.

Detailed explanation-4: -In shoots of various members of the Chenopodi-aceae, phellogen usually arises from the pericycle or phloem parenchyma and is later closely associated with the cambial region (LEISERING 1899; DE FRAINE 1912; METCALFE and CHALK 1950; FAHN 1964; FINKELSTEIN 1964) .

Detailed explanation-5: -cambium, called the phellogen or cork cambium, is the source of the periderm, a protective tissue that replaces the epidermis when the secondary growth displaces, and ultimately destroys, the epidermis of the primary plant body.