Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic material – a natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin that resists compression. In this article, Internal structure of Wood …

Anomalous secondary growth” is the term under which have been grouped cambial conformations, cambial products, and cambial numbers which differ from the most common “normal” condition, namely, a single cylindrical cambium that produces phloem externally and xylem internally. In this article, Anomalous secondary growth, it’s causes and position will be …

Periderm is the corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection. It is a cylindrical tissue that covers the surfaces of stems and roots of perennial plants during early secondary growth; therefore it is not found in monocots and …

When we think of animals and plants, we have a pretty good way of dividing them into two distinct groups: one converts sunlight into energy and the other has to eat food to make its energy. Well, those dividing lines come crashing down with the discovery of a sea slug …

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, 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, Cortex, …

Stem is the plant axis that bears buds and shoots with leaves and, at its basal end, roots. It is composed of three tissue systems that include the epidermis, vascular, and ground tissues, all of which are made from the simple cell types. In this article, the Primary Structure of …

Meristematic tissue is the plant tissue that has the ability to divide actively throughout its life. It consists of undifferentiated cells capable of cell division. Apical Meristamatic tissue is one kind of meristem  which stays at the tip of a plant shoot or root  and causes the shoot or root to …

Gymnosperms are seed producing plants that do not produce any covering surrounding the seed. Cycas and Gnetum are two example of Gymnosperms that are respectively considered as primitive and advanced species. In this article, Primitive characteristics of Cycas and advanced ones of Gnetum will be discussed explicitly. CYCAS Cycas is a …