What is secondary growth? what is the mechanism of secondary growth in dicot stem.

 

Question: What is secondary growth? what is the mechanism of secondary growth in dicot stem.

Secondary growth is the increase in thickness or girth of a plant stem or root after primary growth has ceased. In dicot stems, secondary growth occurs through the activity of the lateral meristem, also known as the cambium. The cambium is a thin layer of cells that divides to produce new cells both internally (towards the pith) and externally (towards the bark). The cells produced on the inside of the cambium differentiate into xylem tissue, which conducts water and minerals from the roots to the leaves. The cells produced on the outside differentiate into phloem tissue, which conducts sugars and other organic compounds from the leaves to the rest of the plant. This process of secondary growth in dicot stems results in the formation of annual rings, which can be used to determine the age of a tree.

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