SECONDARY GROWTH IN DICOT STEM

Dicot Stem: The growth in length of main axis by the activity of apical meristem is called primary growth. Increase in thickness or girth of the aixs due to the formation of secondary tissue is called secondary growth. The secondary tissue if formed by the activity of cambium and cork-cambium. The cambium forms secondary tissues in the stelar region and cork-cambium form secondary tissues into cortical regions. Secondary growht occurs only in dicot stem and root. It is usually absent in monocot root and stem.

In dicot stem, secondary growth takes place through the following steps: