Term
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Definition
| A cell wall layer deposited while a cell is growing; typically extensible |
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Definition
| Innermost layer of a cell wall deposited after cell enlargement has ceased, often lignified |
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Definition
| A band of suberin within the anticlinal walls of endodermal and exodermal cells |
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Definition
| Polymer with which certain cell walls (those with wood) become impregnated |
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Definition
| Tissues derived from the ground meristem. All are simple tissues composed of a single type of cell, which is named after the tissue |
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Definition
| Tissues composed of cells with thin primary cell wall |
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Definition
| Contains chloroplasts and functions in photosynthesis |
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Definition
| Contains large intracellular air spaces and functions in gas exchange |
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Definition
Characterized by a suberized Casparian strip; regulates transport of materials into the vascular bundles of most roots and some leaves and stems.
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Definition
| Characterized by large accumulations of storage products such as starch, protein, oil, hemicellulose, or water |
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Definition
| Tissues composed of cells with unevenly thickened primary cell walls that strengthen growing organs. Types are classified according to the arrangement of the wall thickenings |
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Definition
| Tissues composed of cells with thick, secondary cell wall that are usually lignified. Types are classified according to cell shape |
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Definition
| Variable in shape, but not like fibers |
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Definition
| Tissues derived from the protoderm or cork cambium that cover the surface of the plant body. The dermal tissues are complex (composed of several cell types) |
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Definition
| A complex tissue that is usually a single cell layer thick |
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Definition
| The least specialized cells of the epidermis, may secrete a cuticle |
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Definition
| Cells that project from the surface of the epidermis |
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Term
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Definition
| An epidermis that is more than one cell layer thick |
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Term
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Definition
| Tissues derived from the procambium or vascular cambium that transport water and photosynthate |
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Definition
| A conducting cell of the xylem, characterized by an elongated shape and lignified secondary cell wall |
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Term
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Definition
| A tracheary element with perforation plates |
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Term
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Definition
| The end wall of a vessel element where the secondary cell wall was not deposited and the primary cell wall has been digested |
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Term
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Definition
| A tracheary element that lacks perforations plates, water flows from between tracheids through pits |
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Term
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Definition
| A cell in the xylem that is intermediate between a tracheid and a libriform fiber |
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Term
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Definition
| The photosynthate-conducting tissue of plants |
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Definition
| A conducting cell in the phloem |
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Definition
| A sieve element with perforation plates, characteristic of angiosperms |
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Definition
| The end wall of a sieve-tube element that is perforated by sieve plate pores |
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Definition
| An enlarged plasmodesma that perforates a sieve plate |
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Term
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Definition
| Long tube of sieve elements (also called sieve tube members) connected by sieve plates |
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Term
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Definition
| a sieve element that lacks perforation plates, characteristic of gymnosperms |
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Definition
| A cell in the phloem that is connected to a sieve-tube member by numerous plasmodesmata |
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Definition
| A defined region where new cells arise in predictable pattern; localized regions of cell division |
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Definition
| A cell or organ in its initial stage of development |
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Definition
| Arises at the shoot apical meristem |
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Definition
| Arises in the axil of a leaf primordium |
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Definition
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Definition
| A general zone in which cell division is frequent |
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Term
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Definition
| Initial cells in the root or shoot apical meristem |
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Term
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Definition
| The single initial in the apical meristems of most seedless vascular plants |
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Term
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Definition
| A meristem that is present in the embryo of a plant; generally responsible for increase in the length of plants |
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Term
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Definition
| A meristem located at the apex of a root |
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Term
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Definition
| A thimble-shaped mass of cells that covers the root apical meristem |
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Term
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Definition
| Meristem that arise from tissues produced by a primary meristem; generally responsible for increase in thickness of plants |
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Term
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Definition
| A sheet-like meristem that produces secondary xylem and secondary phloem |
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Term
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Definition
| A sheet-like meristem that produces cork |
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Term
| Primary Meristematic Tissue |
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Definition
| A group of cells beneath the apical meristem that has become distinct in appearance from neighboring groups of cells |
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Term
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Definition
| Develops into the vascular tissue system |
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Term
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Definition
| Develops into the dermal tissue system |
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Term
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Definition
| Develops into the ground tissue system |
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Term
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Definition
| A strand of tissue containing primary xylem and primary phloem |
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Term
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Definition
| A major vascular bundle in the shoot or root |
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Term
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Definition
| A vascular bundle that connects a leaf to the axial vascular system |
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Term
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Definition
| A break in the vascular cylinder above the point where a leaf trace arises |
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Term
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Definition
| Arrangement of vascular bundles in roots and stems |
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Term
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Definition
| The region of ground tissue in a leaf where the chlorenchyma cells are elongated and arranged perpendicular to the epidermis, usually in the upper half of the leaf |
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Term
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Definition
| The region of ground tissue in a leaf where parenchyma cells are branched and intercellular air spaces are extensive, usually in the lower half of the leaf |
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Term
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Definition
| The layer of tightly-packed cells that surround the vascular tissue in leaves |
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Definition
| A group of cells that connect a vein to the epidermis in a leaf |
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Definition
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Definition
| The layer of cells that produce suberin to seal the petiole before abscission |
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Term
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Definition
| The layer of cells that secrete cell wall degrading enzymes forming a weak point where an abscising leaf can drop off |
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Term
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Definition
| The outer layer of tissue in a plant, except where it is replaced by periderm |
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Term
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Definition
| Ground tissue between the vascular bundle and epidermis |
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Term
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Definition
| Ground tissue in the center of a stem |
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Term
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Definition
| in roots, the layer of cells between Vascular tissue and endodermis that gives rise to lateral roots and vascular cambium |
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Definition
| A stem that is leaf-like in appearance |
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Term
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Definition
| Fungal mycelia are internal |
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Term
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Definition
| Fungal mycelia are external |
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Term
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Definition
| Water-conducting tissue produced by the vascular cambium, wood |
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Term
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Definition
| Photosynthate-conducting tissue produced by the vascular cambium, inner bark |
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Term
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Definition
| Cells elongated parallel to the organ axis, develop from fusiform initials |
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Term
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Definition
| Cells elongated radially, develop from ray initials |
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Term
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Definition
| Parenchyma cells of the ray system |
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Term
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Definition
| Tracheids of the ray system |
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Term
| Secondary Vascular Bundles |
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Definition
| Vascular bundles that do not develop from procambium |
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Term
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Definition
| The cork cambium and the tissues in produces, outer bark |
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Term
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Definition
| Cells produced by the cork cambium that have suberized cells walls and are dead at maturity |
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Term
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Definition
| A region of the periderm where cells are loosely packed, allows gas exchange |
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