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

The endodermis contains a barrier to the movement of solutes and water that is made of lignin, the same material present in wood.

From Science Daily • Oct. 27, 2023

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 ensures that only materials required by the root pass through the endodermis, while toxic substances and pathogens are generally excluded.

From Textbooks • Jun. 9, 2022

The outer pericycle, endodermis, cortex and epidermis are the same in the dicot root.

From Textbooks • Jan. 1, 2015

Root-hair; 2. piliferous layer; 3. cortex; 4. endodermis; 5. pericycle; 6. xylem; 7. phloëm.

From A Handbook of Some South Indian Grasses by Rangachari, K.