endodermis

American  

[en-doh-dur-mis] / ˌɛn doʊˈdɜr mɪs /

noun

Botany.

1. 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.

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endodermis British  

/ ˌɛndəʊˈdɜːmɪs /

noun

1. 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

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endodermis Scientific  

/ ĕn′də-dûr′mĭs /

1. The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems. In the roots the endodermis helps regulate the intake of water and minerals into the vascular tissues from the cortex.

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Etymology

Origin of endodermis

First recorded in 1880–85; endo- + -dermis

Example Sentences

This seal ensures the only pathway for nutrients and water to be taken up by roots is through the cells of the endodermis.

From Science Daily • Oct. 27, 2023

This control is exerted by a specialised layer of root tissue called the endodermis.

From Science Daily • Oct. 27, 2023

The endodermis is exclusive to roots, and serves as a checkpoint for materials entering the root’s vascular system.

From Textbooks • Jun. 9, 2022

A layer of cells known as the endodermis separates the stele from the ground tissue in the outer portion of the root.

From Textbooks • Jun. 9, 2022

A striking feature in the roots of several genera, excluding the Abietineae, is the occurrence Anatomy. of thick and somewhat irregular bands of thickening on the cell-walls of the cortical layer next to the endodermis.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" by Various