symplastn.

/ˈsɪmplɑːst/

/ˈsɪmplast/

Etymology: < sym- prefix + -plast comb. form.

Botany.

†a. [ < German symplast (J. von Hanstein 1880, in Bot. Abh. IV. ii. 9).] A multinucleate cell created either by the fusion of cells into one cytoplasmic mass, or by the division of the nucleus of a single energid. Obsolete.

ΘΚΠ

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

bast cell1842

basal cell1846

pollen cell1857

companion cell1859

segment1862

pollen mother cell?1870

sextant1875

transfusion cell1875

idioblast1882

trichoblast1882

symplast1894

megasporocyte1924

oat cell1940

heterokaryon1945

1894 Jrnl. Royal Microsc. Soc. 376 Klemm objects to the term ‘unicellular’ as applied to Caulerpa prolifera and similar organisms. They should be regarded rather as ‘symplasts’, composed of a number of energids.

1900 Jrnl. Royal Microsc. Soc. 475 When the polyplasts are so completely fused together that their cytoplasms form a single mass in which a number of nuclei are imbedded, Hanstein's term ‘symplasts’ may be applied.

1912 L. A. Borradaile Man. Elem. Zool. vi. 116 Groups of similar, unseparated energids are known as syncytia. They may be plasmodia, formed by the union of free energids, or symplasts, formed by the division of the nucleus of a single energid.

b. [ < German symplast (E. Münch Die Stoffbewegungen in der Pflanze (1930) 73).] A continuous network of interconnected plant cell protoplasts.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > symplast

symplast1938

symplasm1948

1938 Amer. Jrnl. Bot. 25 529/2 Studies on the occurrence of plasmodesmata in living tissues show that where pits occur the protoplasts are commonly connected by these strands. Consequently the ‘symplast’..of the root must constitute an interconnected protoplasmic unit.

1976 B. E. S. Gunning in Gunning & Robards Intercellular Communication in Plants: Studies on Plasmodesmata i. 2 Following the evolution of plasmodesmata, the plant body is..composed of two major compartments, for which the terms apoplast and symplast are convenient (Münch, 1930)... The term symplast refers to the interconnected protoplasts, all bounded by a continuous plasmalemma.

Derivatives

symˈplastic adj. of or pertaining to a symplast or symplasm; symplastic growth, the expansion of a common wall between adjacent plant cells during cell enlargement.

ΘΚΠ

the world > life > biology > organism > micro-organism > bacterium > [adjective] > aggregate of

zoogloeal1879

zoogloeic1883

symplastic1916

symplasmic1923

symplasmatic1974

the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > parts of cell > cell wall and parts > expansion of or pitting in

symplastic growth1916

pitting1933

1916 Löhnis & Smith in Jrnl. Agric. Res. VI. 680 Type D is in most cases the dissolution product either of the large forms [of Bacillus azotobacter]..or of the small cells... As it is made up by a thorough mixing or melting of a frequently large number of cells, spores, or gonidia, the term symplasm or symplastic stage seems to be a correct and convenient name.

1930 J. H. Priestley in New Phytologist 29 132 It is proposed to call this alternative method of growth now described symplastic growth.

1981 J. R. Barnett Xylem Cell Devel. ii. 63 This symplastic growth hypothesis..could not explain satisfactorally the type of growth in which an enlarging cell, such as a fibre, increases the number of cells with which it is in contact as it grows.

This entry has not yet been fully updated (first published 1986; most recently modified version published online September 2018).

单词	symplast
释义	symplastn. /ˈsɪmplɑːst//ˈsɪmplast/ Etymology: < sym- prefix + -plast comb. form. Botany. †a. [ < German symplast (J. von Hanstein 1880, in Bot. Abh. IV. ii. 9).] A multinucleate cell created either by the fusion of cells into one cytoplasmic mass, or by the division of the nucleus of a single energid. Obsolete. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > other types bast cell1842 basal cell1846 pollen cell1857 companion cell1859 segment1862 pollen mother cell?1870 sextant1875 transfusion cell1875 idioblast1882 trichoblast1882 symplast1894 megasporocyte1924 oat cell1940 heterokaryon1945 1894 Jrnl. Royal Microsc. Soc. 376 Klemm objects to the term ‘unicellular’ as applied to Caulerpa prolifera and similar organisms. They should be regarded rather as ‘symplasts’, composed of a number of energids. 1900 Jrnl. Royal Microsc. Soc. 475 When the polyplasts are so completely fused together that their cytoplasms form a single mass in which a number of nuclei are imbedded, Hanstein's term ‘symplasts’ may be applied. 1912 L. A. Borradaile Man. Elem. Zool. vi. 116 Groups of similar, unseparated energids are known as syncytia. They may be plasmodia, formed by the union of free energids, or symplasts, formed by the division of the nucleus of a single energid. b. [ < German symplast (E. Münch Die Stoffbewegungen in der Pflanze (1930) 73).] A continuous network of interconnected plant cell protoplasts. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > symplast symplast1938 symplasm1948 1938 Amer. Jrnl. Bot. 25 529/2 Studies on the occurrence of plasmodesmata in living tissues show that where pits occur the protoplasts are commonly connected by these strands. Consequently the ‘symplast’..of the root must constitute an interconnected protoplasmic unit. 1976 B. E. S. Gunning in Gunning & Robards Intercellular Communication in Plants: Studies on Plasmodesmata i. 2 Following the evolution of plasmodesmata, the plant body is..composed of two major compartments, for which the terms apoplast and symplast are convenient (Münch, 1930)... The term symplast refers to the interconnected protoplasts, all bounded by a continuous plasmalemma. Derivatives symˈplastic adj. of or pertaining to a symplast or symplasm; symplastic growth, the expansion of a common wall between adjacent plant cells during cell enlargement. ΘΚΠ the world > life > biology > organism > micro-organism > bacterium > [adjective] > aggregate of zoogloeal1879 zoogloeic1883 symplastic1916 symplasmic1923 symplasmatic1974 the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > parts of cell > cell wall and parts > expansion of or pitting in symplastic growth1916 pitting1933 1916 Löhnis & Smith in Jrnl. Agric. Res. VI. 680 Type D is in most cases the dissolution product either of the large forms [of Bacillus azotobacter]..or of the small cells... As it is made up by a thorough mixing or melting of a frequently large number of cells, spores, or gonidia, the term symplasm or symplastic stage seems to be a correct and convenient name. 1930 J. H. Priestley in New Phytologist 29 132 It is proposed to call this alternative method of growth now described symplastic growth. 1981 J. R. Barnett Xylem Cell Devel. ii. 63 This symplastic growth hypothesis..could not explain satisfactorally the type of growth in which an enlarging cell, such as a fibre, increases the number of cells with which it is in contact as it grows. This entry has not yet been fully updated (first published 1986; most recently modified version published online September 2018). < n.1894
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