phellodermn.

Brit.

/ˈfɛlədəːm/, U.S.

/ˈfɛləˌdərm/

Origin: A borrowing from German. Etymon: German Phelloderm.

Etymology: < German Phelloderm (1873 in the passage translated in quot. 1875 at main sense), alteration of Phelloderma (C. Sanio 1860, in Jahrb. f. wissenschaftliche Botanik 2 47) < ancient Greek ϕελλός cork (see phelloplastic n.) + δέρμα skin (see derma n.; compare -derm comb. form).

Botany.

The innermost layer of the periderm in some plants, composed of parenchymatous cells.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > cambium or periderm

cambium1672

peridermis1839

periderm1849

mother1862

phelloderm1875

phellogen1875

suber1913

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. ii. 90 In some cases the phellogen of the periderm gives rise not only to cork-cells..but..permanent parenchyma-cells containing chlorophyll..which Sanio terms the suberous cortical layer (Phelloderm)... In such cases the phellogen lies between the periderm and the phelloderm, the outer of its daughter-cells producing cork-cells, the inner phelloderm.

1888 Bot. Gaz. 13 252 Sanio named the cells cut off from the phellogen toward the center of the stem phelloderm, those cut off toward the circumference phellem.

1932 New Phytologist 31 7 The phellogen in this grafting region is stimulated to form on its inner side..a phelloderm consisting of several layers of small thin-walled cells.

1960 K. Esau Anat. Seed Plants i. 4 It arises in the epidermis, the cortex, the phloem, or the pericycle and produces phellem toward the outside, phelloderm toward the inside.

1992 M. Ingrouille Diversity & Evol. Land Plants 208 In some species the phellogen also produces a narrow band (1-4 layers) of tissue called the phelloderm towards the inside.

Derivatives

phelloˈdermal adj. of or relating to the phelloderm.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [adjective] > of cambium or periderm

procambial1872

cambial1881

cambiform1882

peridermal1884

phellodermal1884

phellogenetic1884

phellogenic1884

peridermic1890

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 549 The number of the phellodermal layers..is in most species very small, in comparison with the cork-layers which appear in the same space of time.

1938 H. E. Heyward Struct. Econ. Plants i. 19 Normally, the cells of the phellogen..undergo tangential divisions similar to those of a true cambium, differentiating into phellem (cork cells) centrifugally, and phellodermal cells, centripetally.

1980 Amer. Jrnl. Bot. 67 159/1 Thus, Van Tieghem's conclusion regarding phellodermal origin of extrafascicular cambia is untenable.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	phelloderm
释义	phellodermn. Brit. /ˈfɛlədəːm/, U.S. /ˈfɛləˌdərm/ Origin: A borrowing from German. Etymon: German Phelloderm. Etymology: < German Phelloderm (1873 in the passage translated in quot. 1875 at main sense), alteration of Phelloderma (C. Sanio 1860, in Jahrb. f. wissenschaftliche Botanik 2 47) < ancient Greek ϕελλός cork (see phelloplastic n.) + δέρμα skin (see derma n.; compare -derm comb. form). Botany. The innermost layer of the periderm in some plants, composed of parenchymatous cells. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > cambium or periderm cambium1672 peridermis1839 periderm1849 mother1862 phelloderm1875 phellogen1875 suber1913 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. ii. 90 In some cases the phellogen of the periderm gives rise not only to cork-cells..but..permanent parenchyma-cells containing chlorophyll..which Sanio terms the suberous cortical layer (Phelloderm)... In such cases the phellogen lies between the periderm and the phelloderm, the outer of its daughter-cells producing cork-cells, the inner phelloderm. 1888 Bot. Gaz. 13 252 Sanio named the cells cut off from the phellogen toward the center of the stem phelloderm, those cut off toward the circumference phellem. 1932 New Phytologist 31 7 The phellogen in this grafting region is stimulated to form on its inner side..a phelloderm consisting of several layers of small thin-walled cells. 1960 K. Esau Anat. Seed Plants i. 4 It arises in the epidermis, the cortex, the phloem, or the pericycle and produces phellem toward the outside, phelloderm toward the inside. 1992 M. Ingrouille Diversity & Evol. Land Plants 208 In some species the phellogen also produces a narrow band (1-4 layers) of tissue called the phelloderm towards the inside. Derivatives phelloˈdermal adj. of or relating to the phelloderm. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [adjective] > of cambium or periderm procambial1872 cambial1881 cambiform1882 peridermal1884 phellodermal1884 phellogenetic1884 phellogenic1884 peridermic1890 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 549 The number of the phellodermal layers..is in most species very small, in comparison with the cork-layers which appear in the same space of time. 1938 H. E. Heyward Struct. Econ. Plants i. 19 Normally, the cells of the phellogen..undergo tangential divisions similar to those of a true cambium, differentiating into phellem (cork cells) centrifugally, and phellodermal cells, centripetally. 1980 Amer. Jrnl. Bot. 67 159/1 Thus, Van Tieghem's conclusion regarding phellodermal origin of extrafascicular cambia is untenable. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1875
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