dermatogen

der·mat·o·gen

D0152600 (dûr-măt′ə-jən)n. See protoderm.

dermatogen

(dəˈmætədʒən; ˈdɜːməˌtəʊdʒən) n (Botany) botany a meristem at the apex of stems and roots that gives rise to the epidermis

pro•to•derm

(ˈproʊ təˌdɜrm)

n. a thin outer layer of the meristem in embryos and growing points of roots and stems, which gives rise to the epidermis. Also called dermatogen. [1930–35]

Dermatogen

enUK

dermatogen

[dər′mad·ə‚jen] (botany) The outer layer of primary meristem or the primordial epidermis in embryonic plants. Also known as protoderm.

Dermatogen

in plants, the dense (without intercellular spaces) outer layer of cells of primary formative tissue (promeristem) in growing root tips.

Dermatogen cells usually divide such that the septa formed are perpendicular to the root surface—that is, anticlinal. (Only in the aerial roots of the orchids and arum families and in the thick underground roots of some amaryllis and lilies are they parallel to the surface of the organ, or periclinal, forming a multilayered covering—the so-called velamen.)

单词	dermatogen
释义	dermatogen enUK der·mat·o·gen D0152600 (dûr-măt′ə-jən)n. See protoderm. dermatogen (dəˈmætədʒən; ˈdɜːməˌtəʊdʒən) n (Botany) botany a meristem at the apex of stems and roots that gives rise to the epidermis pro•to•derm (ˈproʊ təˌdɜrm) n. a thin outer layer of the meristem in embryos and growing points of roots and stems, which gives rise to the epidermis. Also called dermatogen. [1930–35] Dermatogen enUK dermatogen [dər′mad·ə‚jen] (botany) The outer layer of primary meristem or the primordial epidermis in embryonic plants. Also known as protoderm. Dermatogen in plants, the dense (without intercellular spaces) outer layer of cells of primary formative tissue (promeristem) in growing root tips. Dermatogen cells usually divide such that the septa formed are perpendicular to the root surface—that is, anticlinal. (Only in the aerial roots of the orchids and arum families and in the thick underground roots of some amaryllis and lilies are they parallel to the surface of the organ, or periclinal, forming a multilayered covering—the so-called velamen.) dermatogen enUK dermatogen (dĕr-măt′ō-jĕn) [″ + gennan, to produce] Antigen from a skin disease. dermatogen superficial layer of cells in the growing point of a plant stem or shoot thought to give rise to the epidermis.
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