Term
|
Definition
| Either of two specialized epidermal cells that flank the pore of a stoma and usually cause it to open and close. |
|
|
Term
|
Definition
| Any similar or corresponding lateral outgrowth of a stem. |
|
|
Term
|
Definition
| Embryonic tissue in plants; undifferentiated, growing, actively dividing cells. |
|
|
Term
|
Definition
| The parenchyma, usually containing chlorophyll, that forms the interior parts of a leaf. |
|
|
Term
|
Definition
| The part of a vascular bundle consisting of sieve tubes, companion cells, parenchyma, and fibers and forming the food-conducting tissue of a plant. |
|
|
Term
|
Definition
| A part of the body of a plant that develops, typically, from the radicle and grows downward into the soil, anchoring the plant and absorbing nutriment and moisture. |
|
|
Term
|
Definition
| The ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. |
|
|
Term
|
Definition
| A compound tissue in vascular plants that helps provide support and that conducts water and nutrients upward from the roots, consisting of tracheids, vessels, parenchyma cells, and woody fibers. |
|
|
Term
|
Definition
| A thin layer of cells forming the outer integument of seed plants and ferns. |
|
|
Term
|
Definition
| An outer tissue of bark produced by and exterior to the phellogen. |
|
|
Term
|
Definition
| Plant tissue consisting of ducts or vessels, that, in the higher plants, forms the system (vascular system) by which sap is conveyed through the plant. |
|
|
Term
|
Definition
| Tissue made up of the actively dviding cells responsible for plant growth |
|
|
Term
|
Definition
| The first root produced by a germinating seed, developing from the radicle of the embryo. |
|
|
Term
|
Definition
| One of the branches of a primary root. |
|
|
Term
|
Definition
| A main root descending downward from the radicle and giving off small lateral roots. |
|
|
Term
|
Definition
| The loose mass of epidermal cells covering the apex of most roots, serving to protect the meristematic cells behind it. |
|
|
Term
|
Definition
| It is during this zone that the chondrocytes undergo hypertrophy (become enlarged). Chondrocytes contain large amounts of glycogen and begin to secrete alkaline phosphatase. |
|
|
Term
|
Definition
| Any process in which a mixture of materials separates out partially or completely into its constituent parts, as in the cooling and solidification of a magma into two or more different rock types or in the gradual separation of an originally homogeneous earth into crust, mantle, and core |
|
|
Term
|
Definition
| An elongated tubular extension of an epidermal cell of a root, serving to absorb water and minerals from the soil. |
|
|
Term
|
Definition
| The portion of a stem between the epidermis and the vascular tissue; bark. |
|
|
Term
|
Definition
| A specialized tissue in the roots and stems of vascular plants, composed of a single layer of modified parenchyma cells forming the inner boundary of the cortex. |
|
|
Term
|
Definition
| A central column formed by the vascular tissue of a plant root; surrounded by parenchymal ground tissue. |
|
|
Term
|
Definition
| Plant structures that have been modified to serve the same function as leaves and occur in a number of different plant groups. |
|
|
Term
|
Definition
| The stems of plants who have been growing for two years or more. |
|
|
Term
|
Definition
| Any of various small apertures, esp. one of the minute orifices or slits in the epidermis of leaves, stems, etc., through which gases are exchanged. |
|
|
Term
|
Definition
| A longitudinal arrangement of strands of xylem and phloem, and sometimes cambium, that forms the fluid-conducting channels of vascular tissue in the rhizomes, stems, and leaf veins of vascular plants, the arrangement varying with the type of plant. |
|
|
Term
|
Definition
| The soft, spongy central cylinder of parenchymatous tissue in the stems of dicotyledonous plants. |
|
|
Term
|
Definition
| Terminal protuberance on a plant, containing rudimentary foliage (leaf bud), the rudimentary inflorescence (flower bud), or both (mixed bud). |
|
|
Term
|
Definition
| A bud that is borne at the axil of a leaf and is capable of developing into a branch shoot or flower cluster. |
|
|
Term
|
Definition
| The slender stalk by which a leaf is attached to the stem; leafstalk. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Fertilization by pollen from the same flower. |
|
|
