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Root, Root - External link, Root - Root growth, Root - Root structure, Root - Rooting depths, Root - Specialized roots, Root - Types of roots, Rhizophilous - organisms which thrive in a proximity or in a symbiotic relationship with plant roots., Mycorrhiza - root symbiosis in which individual hyphae extending from the mycelium of a fungus colonize the roots of a host plant., fibrous root system, stolon

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Root - External link: Encyclopedia II - Root - Root structure

At the tip of every growing root is a conical covering of tissue called the root cap. It usually is not visible to the naked eye. It consists of undifferentiated soft tissue (parenchyma) with unthickened walls covering the apical meristem. The root cap provides mechanical protection to the meristem cells as the root advances through the soil, its cells worn away but quickly replaced by new cells generated by cell division within the meristem. The root cap is also involved in the production of mucigel, a sticky mucilage t ...

A true root system consists of a primary root and secondary roots (or lateral roots). The primary root originates in the radicle of the seedling. During its growth it rebranches to form the lateral roots. Generally, two categories are recognized: the taproot: the primary root is prominent and has a single, dominant axis; there are fibrous secondary roots running outward. Usually allows for deeper roots capable of reaching low water tables. Most common in dicots the primary root is not dominant: the whole root system is fibrous and branches in all dire ...

Early root growth is a function of the apical meristem located near the tip of the root. The meristem cells more or less continuously divide, producing more meristem, root cap cells (these sacrificed to protect the meristem), and undifferentiated root cells. The latter will become the primary tissues of the root, first undergoing elongation, a process that pushes the root tip forward in the growing medium. Gradually these cells differentiate and mature into sp ...

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