plasmodesman.

Brit.

/ˌplazmə(ʊ)ˈdɛzmə/, U.S.

/ˌplæzmoʊˈdɛzmə/

Inflections: Plural plasmodesmata, (disused) plasmodesmen Brit.

/ˌplazmə(ʊ)ˈdɛzmən/, U.S.

/ˌplæzmoʊˈdɛzm(ə)n/, (irregular) plasmodesma, (irregular) plasmodesmae, plasmodesms.

Forms:

α. 1900s– plasmodesma.

β. 1900s– plasmodesm Brit. /ˈplazmədɛz(ə)m/, U.S. /ˈplæzməˌdɛzəm/.

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

Etymology: < German Plasmodesma, plural Plasmodesmen (E. Strasburger 1901, in Jahrb. f. wissensch. Bot. 36 503 (singular form on p. 607)) < plasmo- plasmo- comb. form + ancient Greek δέσμα bond, fetter (see desma n.).

Biology (now Botany).

A narrow thread of cytoplasm that passes between adjacent cells and allows communication between them.Originally applied to various types of cytoplasmic bridge between cells in both animals and plants. Now restricted to the cytoplasmic threads which pass through the cell walls of adjacent plant cells.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > parts of cell > other parts

disc1835

crystalloid1863

autoplast1884

plastid1885

granum1894

primary endosperm nucleus1897

chromoplast1902

phragmoplast1904

plasmodesma1905

phragmosome1940

1902 Bot. Gaz. 33 79 Strasburger..has taken up the whole subject of protoplasmic continuity in plant cells. He proposes the term Plasmodesmen for the connecting fibers.]

1905 Amer. Naturalist 39 220 He [sc. Strasburger (1901)] considered the protoplasmic connections as sufficiently clearly differentiated structures to rank as organs of the cell and proposed for them the name plasmodesmen.

1910 Science 27 May 839/1 The ‘plasmodesmata’ of Held and Paton, connecting myotome and neural tube, are not primary intercellular bridges, but are secondary connections of medullary origin.

1925 E. B. Wilson Cell (ed. 3) i. 104 Plasmodesms or cell-bridges are of general occurrence in the epithelial tissues.

1935 Proc. Royal Soc. B. 118 159 The question, whether the plasmodesmata are actually incorporated into the substance of the axones, or whether they constitute merely a lattice upon which the young nerve fibres are supported [etc.].

1966 Protoplasma 61 82 In longitudinal sections of the plasmodesms the real continuity of the cytoplasmic membranes can be observed.

1992 M. Ingrouille Diversity & Evol. Land Plants 26 In parenchyma cells, the cell wall is uniformly thin except in areas with dense plasmodesmata, the primary pit field, where it is even thinner.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	plasmodesma
释义	plasmodesman. Brit. /ˌplazmə(ʊ)ˈdɛzmə/, U.S. /ˌplæzmoʊˈdɛzmə/ Inflections: Plural plasmodesmata, (disused) plasmodesmen Brit. /ˌplazmə(ʊ)ˈdɛzmən/, U.S. /ˌplæzmoʊˈdɛzm(ə)n/, (irregular) plasmodesma, (irregular) plasmodesmae, plasmodesms. Forms: α. 1900s– plasmodesma. β. 1900s– plasmodesm Brit. /ˈplazmədɛz(ə)m/, U.S. /ˈplæzməˌdɛzəm/. Origin: A borrowing from German. Etymon: German Plasmodesma. Etymology: < German Plasmodesma, plural Plasmodesmen (E. Strasburger 1901, in Jahrb. f. wissensch. Bot. 36 503 (singular form on p. 607)) < plasmo- plasmo- comb. form + ancient Greek δέσμα bond, fetter (see desma n.). Biology (now Botany). A narrow thread of cytoplasm that passes between adjacent cells and allows communication between them.Originally applied to various types of cytoplasmic bridge between cells in both animals and plants. Now restricted to the cytoplasmic threads which pass through the cell walls of adjacent plant cells. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > parts of cell > other parts disc1835 crystalloid1863 autoplast1884 plastid1885 granum1894 primary endosperm nucleus1897 chromoplast1902 phragmoplast1904 plasmodesma1905 phragmosome1940 1902 Bot. Gaz. 33 79 Strasburger..has taken up the whole subject of protoplasmic continuity in plant cells. He proposes the term Plasmodesmen for the connecting fibers.] 1905 Amer. Naturalist 39 220 He [sc. Strasburger (1901)] considered the protoplasmic connections as sufficiently clearly differentiated structures to rank as organs of the cell and proposed for them the name plasmodesmen. 1910 Science 27 May 839/1 The ‘plasmodesmata’ of Held and Paton, connecting myotome and neural tube, are not primary intercellular bridges, but are secondary connections of medullary origin. 1925 E. B. Wilson Cell (ed. 3) i. 104 Plasmodesms or cell-bridges are of general occurrence in the epithelial tissues. 1935 Proc. Royal Soc. B. 118 159 The question, whether the plasmodesmata are actually incorporated into the substance of the axones, or whether they constitute merely a lattice upon which the young nerve fibres are supported [etc.]. 1966 Protoplasma 61 82 In longitudinal sections of the plasmodesms the real continuity of the cytoplasmic membranes can be observed. 1992 M. Ingrouille Diversity & Evol. Land Plants 26 In parenchyma cells, the cell wall is uniformly thin except in areas with dense plasmodesmata, the primary pit field, where it is even thinner. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1905
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