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Remove the leaves from the bottom nodes leaving a bare stem not terminating with a node. Dip the part of the stem below the leaves of one shoot into water, and then into a dry compound of Indole-3-butyric acid. Insert the cut stump into one of the cups provided, and fill with water saturated peat moss.
Functions, types. Tap root and lateral roots. Growth and differentiation (root cap, elongation region, zone of root hairs and lateral roots), root apical meristem (RAM). Apical organization (apical cell, histogen and korper-kappe theories). Patterns of vascular differentiation. Origin of lateral roots (initiation, organization and emergence).
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The root system becomes more complex as the plant grows from a single root in a young seedling to a massive system of branched roots, often weighing tons in large trees. During all stages in a plant's growth cycle, there is a balance between the shoot system and the root system (Fig. 7.1). The root system must be able to supply
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Root System BIOLOGY 137 Notes MODULE - 2 Forms and Functions of Plants and animals 6 ROOT SYSTEM The root system is the descending (growing downwards) portion of the plant axis. When a seed germinates, radicle is the first organ to come out of it. It elongates to form primary or the tap root . It gives off lateral branches ( secondary and tertiary
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Figure 4.1. The plant body, shown here as a tomato plant, consists of the shoot system (leaves, buds, stems, flowers and fruits) and the root system (roots). Each organ is made up of cells organized into tissue systems: dermal, vascular and ground. One way the vegetative organs (leaves, stems and roots)
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Plant root systems are organized in two basic ways. A root system composed of one primary root and many secondary roots branching off the primary root is called a taproot system. A fibrous root system is characterized by roots roughly the same size and length. A healthy root system is white or nearly white and smells fresh. A healthy root sys-
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Module 2. E BIOLOGYContentsTrees are the tallest and largest free-standing. organisms on earth. It is thought that there are between 60,000 and 100,000 tree and shrub species in the world, the difference being a reflection of the difficulty of de. ning a “tree”. In this guide, we have used the definition that ‘a tree is regarded as a ...