Upgraded B002 Ntbi0503 Cambial Activity Zones Plant
Upgraded B002 Ntbi0503 Cambial Activity Zones Plant — a labelled NEET Biology diagram with a definitions lexicon.
Diagram comparing the cambial activity zones in different plant parts. Labelled parts: Apical meristem, Secondary Xylem, Cross-section, Monocot Stem, Dicot Stem, Endodermis, Pericycle, Cambium, Growth, Matrix, Phloem, Theca, Adventitious roots, Limited Reinforcement. The meristem located at the tips of the roots and shoots (shoot apex and root apex). It is responsible for primary growth, leading to the increase in length of the plant. FYI: The shoot apical meristem (SAM) is responsible for generating leaves, stems, and flowers, while the root apical meristem (RAM) is responsible for root elongation. Wood formed inside the vascular cambium during secondary growth. A diagrammatic view of an organ or tissue obtained by cutting it at a right angle to its longitudinal axis. FYI: Transverse sections (T.S.) are standard in plant anatomy to study the arrangement of vascular bundles. A plant stem containing numerous vascular bundles scattered throughout the ground tissue, lacking a distinct pith. FYI: Monocot vascular bundles are described as 'closed' because they lack cambium, preventing secondary growth. A plant stem characterized by the arrangement of vascular bundles in a ring and the presence of a distinct pith and cortex. FYI: Dicot stems typically exhibit secondary growth due to the presence of fascicular and interfascicular cambium. The innermost layer of the cortex surrounding the vascular cylinder (stele). It regulates the movement of water and solutes into the vascular tissues. FYI: The endodermis contains the Casparian strips, waxy bands that force water to pass through the cell cytoplasm, making the plant apoplastic pathway difficult. A layer of meristematic cells located immediately internal to the endodermis. It is responsible for initiating the growth of lateral roots. FYI: The pericycle is the site from which most lateral roots originate, making it vital for root system development. A lateral meristem responsible for secondary growth in plants. It is typically composed of vascular cambium (producing xylem and phloem) and cork cambium (producing cork). FYI: The vascular cambium is responsible for the formation of secondary xylem and secondary phloem, leading to the increase in girth (secondary growth). Increase in size or mass; can occur in non-living matter like crystals. The dense fluid within the inner membrane of a mitochondrion containing enzymes and DNA. Vascular tissue responsible for the transport of sugars and metabolic products downward from the leaves. Armored cellulose plates found on the cell wall of Dinoflagellates. Roots that arise from parts of the plant other than the primary root tip, such as from the stem or leaves. FYI: When a plant is propagated by cuttings, the roots that grow from the cut stem are examples of adventitious roots. Limited Reinforcement is a labeled feature or concept in this upgraded BioAtlas image: A comparative diagram showing three cross-sections: Dicot Stem (Cambium Ring), Monocot Stem (No Cambium/Closed Bundles), and Root (Pericycle initiation).