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Home > All Images > 1990 > October > 11 Oct 1990

Images Dated 11th October 1990

Choose from 7 pictures in our Images Dated 11th October 1990 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


LM of biogenic silica in horsetail Featured 11 Oct 1990 Print

LM of biogenic silica in horsetail

Light micrograph of a section of the horsetail Equisetum arvensis showing internal deposits of silica (the yellow features). This biogenic silica is taken up in solution from the surrounding soil and then distributed throughout the plant, in sites such as the cell walls, in amorphous (non- crystalline) form. Its function may be to provide structural support since the cell walls of this primitive plant are quite thin and non-lignified. If the soft tissues are removed using acid then a fragile, skeletal structure of silica remains virtually intact. The plant used to be called scouring rush because of the abrasive qualities of its fibres. Magnification: x400 at 35mm size

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