The change in arrangement of vascular tissues of roots having separate strands of phloem and xylem with exarch protoxylem to collaterally placed phloem and xylem with endarch protoxylem of stem is commonly referred to as root–stem transition. In higher plants root and shoot form a continuous axial structure. In this article, The Transition of Root and Stem …

Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem. Herbaceous plants mostly undergo primary growth, with little secondary growth or increase in thickness. Secondary growth is initiated by the activity of the vascular cambium as …

Root is the underground part of a vascular plant and Leaf is the flattened outgrowth from stem of a vascular plant. In this article, the Primary structure of Root and Leaf will be discussed in detail. Primary Structure of Dicot Root The root of Dicot plants usually consists of Epidermis, …