from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. In a plant stem or root, a cylinder of cells the separates the outer cortex from the central core. The endodermis controls flow of water and minerals within the plant. In most plants, this tissue is restricted to the roots.
- n. The deepest layer of the skin.
from the GNU version of the Collaborative International Dictionary of English
- n. A layer of cells forming a kind of cuticle inside of the proper cortical layer, or surrounding an individual fibrovascular bundle.
from The Century Dictionary and Cyclopedia
- n. In botany, the layer of modified parenchyma-cells which are united to form the sheath surrounding a fibrovascular bundle.
In the forms in which it is most highly developed (Polytrichaceae) this tissue, which is comparable with the xylem of higher plants, is surrounded by a zone of tissue physiologically comparable to phloem, and in the rhizome may be limited by an endodermis.
Grafted walnuts show callus growth from the cambium, and also from the pith of stems and the endodermis of the root.
Pericycle the outermost zone of cells of the stele immediately within the endodermis, 32.
The innermost layer of cells of the cortex is called the = endodermis = and it becomes conspicuous on account of the thickening in the lateral and inner walls of the cells of this layer.
The researchers discovered that a protein molecule called SHORTROOT moves from the vascular cylinder to the endodermis, an inner skin within the root.
These microRNAs seem to move out of the endodermis as signaling molecules.
Vertical bars in (L and M) indicate enlarged region shown in (P and Q). pd, protoderm; pc, procambium; col, columella initials; QC, quiescent center; v, vascular tissue; ep, epidermis; c, cortex; en, endodermis.
In bent cotyledon embryos the expression was confined to the QC and endodermis/cortex stem cells of the embryonic root.
The expression pattern changes in two regions: (1) lateral root founder cells and initials and (2) around the root tip where expression is detected in epidermis, cortex, endodermis, and the root cap.
In adult embryos expression was detected in the QC and future endodermis of the embryonic roots and in the hypocotyls.