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The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Botany) botany the specialized innermost layer of cortex in roots and some stems, which controls the passage of water and dissolved substances between the cortex and stele
[C19: from New Latin, from endo- + Greek derma skin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɛn doʊˈdɜr mɪs)

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.
[1880–85; endo- + -dermis, extracted from epidermis]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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and species Eremanthus pabstii, Hololepis pedunculata and Piptolepis ericoides presents secreting endodermis cells, characterized by the presence of droplets of lipophilic material (Fig.
In the roots, uptake and radial transport of Cu can happen via the symplast, by means of specific transporters located in the plasma membrane, or by diffusion via the apoplast until finding diffusional barriers, such as the Casparian strip in the endodermis. The apoplast has charges derived from sulfuric (R-SH-) and carboxylic (R-COO-) groups, as well as organic compounds present in the cell wall.
A single layered endodermis is located under parenchyma cells.
Thus, Casparian strip mutants are defective in ion homeostasis in the xylem because of inward or outward leakage of ions depending on the ionic concentration gradient across the endodermis cell layer, leading to pleiotropic phenotypes in unfavorable mineral environments.
barbatus stem, the endodermis has been reported to contain many amyloplasts and the vascular bundle arrangement of P.
Evidence for a role in growth and salt resistance of a plasma membrane [H.sup.+]AT Pase in the root endodermis. Plant Journal, Oxford, v.27, p.191-201, 2004.
Four layers of parenchyma cells are usually present in the cortex (Figure 2A), but lacking the exodermis with suberin; the endodermis is present (Figure 2A), but without evident Casparian strips.
In addition, casparian strip of root endodermis also restricted Pb transport across the endodermis into other plant tissues (Seregin and Ivanov, 2001).