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Is callose required for silicification in plants?

Is callose required for silicification in plants? Thumbnail


Abstract

The cell wall polymer callose catalyses the formation of silica in vitro and is heavily implicated in biological silicification in Equisetum (horsetail) and Arabidopsis (thale cress) in vivo Callose, a ß-1,3-glucan, is an ideal partner for silicification, because its amorphous structure and ephemeral nature provide suitable microenvironments to support the condensation of silicic acid into silica. Herein, using scanning electron microscopy, immunohistochemistry and fluorescence, we provide further evidence of the cooperative nature of callose and silica in biological silicification in rice, an important crop plant and known silica accumulator. These new data along with recently published research enable us to propose a model to describe the intracellular events that together determine callose-driven biological silicification.

Acceptance Date Sep 7, 2018
Publication Date Oct 3, 2018
Journal Biology Letters
Publisher The Royal Society
DOI https://doi.org/10.1098/rsbl.2018.0338
Keywords biogenic silica, silicic acid, silicification, callose, rice
Publisher URL http://dx.doi.org/10.1098/rsbl.2018.0338

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