endodermis

[ en-doh-dur-mis ]

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.

endodermis

/ 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

endodermis

/ 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.

Word History and Origins

Origin of endodermis¹

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

Word History and Origins

Origin of endodermis¹

C19: from New Latin, from endo- + Greek derma skin

Example Sentences

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

From Science Daily

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

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

These proteins act in coordination with other described root regulatory components to direct and organize the correct deposition of lignin in the endodermis allowing the plant to ensure it receives the optimum balance of nutrients from the soil.

From Science Daily

Endodermal feedback is absolutely required for initiation and growth of lateral roots, and we provide evidence that this is mediated by controlled volume loss in the endodermis.

From Science Magazine