Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.
from The Century Dictionary.
- noun In botany, the layer of modified parenchyma-cells which are united to form the sheath surrounding a fibrovascular bundle.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) A layer of cells forming a kind of cuticle inside of the proper cortical layer, or surrounding an individual fibrovascular bundle.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun botany In a plant
stem orroot , acylinder ofcells the separates the outercortex 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. - noun zoology The deepest layer of the
skin .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Grafted walnuts show callus growth from the cambium, and also from the pith of stems and the endodermis of the root.
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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.
A Handbook of Some South Indian Grasses K. Rangachari
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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.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various
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Pericycle the outermost zone of cells of the stele immediately within the endodermis, 32.
A Handbook of Some South Indian Grasses K. Rangachari
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In bent cotyledon embryos the expression was confined to the QC and endodermis/cortex stem cells of the embryonic root.
PLoS Biology: New Articles Ora Hazak et al. 2010
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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.
PLoS Biology: New Articles Ora Hazak et al. 2010
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The researchers discovered that a protein molecule called SHORTROOT moves from the vascular cylinder to the endodermis, an inner skin within the root.
innovations-report 2010
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In adult embryos expression was detected in the QC and future endodermis of the embryonic roots and in the hypocotyls.
PLoS Biology: New Articles Ora Hazak et al. 2010
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These microRNAs seem to move out of the endodermis as signaling molecules.
innovations-report 2010
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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.
PLoS Biology: New Articles Ora Hazak et al. 2010
hernesheir commented on the word endodermis
(n): (plant anatomy) a thin layer of parenchyma cells in plant roots, just outside the vascular cylinder or stele, that regulates water flow. The endodermis consists of a single-celled ring which forms a selective barrier between the outer cortex and the inner pericycle tissue of the root. The endodermis regulates the molecules that can pass through cell walls into the tissues of the plant.
January 4, 2009