Ueber das Amyloid, eine neue Pflanzensubstanz

Abstract

XX. Ucber d a s Amyloid, eine neiiePJlonzmsubstanz ; oon Dr. I'h. Y o g e l und Dr. &L J. Schleiden. w i r niinschen in den folgenden kunen Bemerkungen nur aufmerksam zu macben auf eine, wie uns scheint, hBchst interessante vegetabilische Materie, da es uns zn einer ausfiihrlichen Untersuchung derselben eben so sehr an Zeit als an Material mangelte I ) .

Origins of a pervasive, erroneous idea: The “green birefringence” of Congo red‐stained amyloid

“…Despite a common idea, this was not because he thought the human material resembled starch. “Amyloid” had been first used by the German botanists Julius Rudolf Theodore Vogel (1812‐1841) and Matthias Jakob Schleiden (1804‐1881) in a paper in 1839, although their work had been done in 1838 . They invented amyloid as a name for a plant material that to acquire a property of starch, namely, turning blue on addition of iodine, had to be treated with sulphuric acid.…”

“…"Amyloid" had been first used by the German botanists Julius Rudolf Theodore Vogel (1812-1841) and Matthias Jakob Schleiden (1804-1881) in a paper in 1839, although their work had been done in 1838. 11 They invented amyloid as a name for a plant material that to acquire a property of starch, namely, turning F I G U R E 1 Amyloid in a kidney stained by Congo red, examined between crossed polarizer and analyser. Green and yellow, or blue-green and yellow-green, are seen.…”

Xyloglucan structure and post-germinative metabolism in seeds of Copaifera langsdorfii from savanna and forest populations

“…Although only a few seed xyloglucans have been subjected to full structural analysis (Reid 1985), their botanicai distribution has been surveyed histochemically (Kooiman 1960a), thanks to the distinctive blue colour (the amyloid reaction) that these cell-wall polysaccharides exhibit on treatment with an iodine reagetst (Vogel and Schleiden 1839). This iodine reaction has been reported for the cotyledonary cell walls of 8 species from the tropical genus Copaifera (Kooiman 1960a).…”

ON THE OCCURRENCE OF AMYLOIDS IN PLANT SEEDS1

“…and VOGEL and SCHLEIDEN (1839) were the first to observe a blue coloration of the cell-walls in the cotyledons of some plant species when the latter were treated with an iodine-potassium iodide solution. The cell-wall substance which coloured blue with this reagent, was called "amyloid" by these authors.…”