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2016 ; 7
(ä): 463
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Silicon and the Plant Extracellular Matrix
#MMPMID27148294
Guerriero G
; Hausman JF
; Legay S
Front Plant Sci
2016[]; 7
(ä): 463
PMID27148294
show ga
Silicon (Si) is one of the most abundant elements on earth. Although not
considered essential for the growth and development of higher plants, it is
nonetheless known to increase vigor and to play protective roles. Its protective
effects include for instance alleviation of (a)biotic stress damages and heavy
metal toxicity. Si was shown to interact with several components of the plant
cell walls in the form of silica (SiO2). In plants SiO2 promotes strengthening of
the cell walls and provides increased mechanical support to the aerial parts. The
relationship SiO2-plant cell wall has been well documented in monocots and
pteridophytes, which are known Si accumulators, while much less is known on the
interaction of Si with the cell walls of dicots. We here provide a concise
up-to-date survey on the interaction between Si and plant cell wall components by
focussing on cellulose, hemicelluloses, callose, pectins, lignin, and proteins.
We also describe the effects of Si on cell wall-related processes by discussing
the published results in both monocots and dicots. We conclude our survey with a
description of the possible mechanisms by which Si exerts priming in plants.