Transport of silicon from roots to panicles in plants

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68 Citations (Scopus)

Abstract

Silicon (Si) is the most abundant minerals in soil and exerts beneficial effects on plant growth by alleviating various stresses. The transport of Si from soil to the panicles is mediated by different transporters. Lsi1, belonging to a NIP group of the aquaporin family, is responsible for the uptake of Si from soil into the root cells in both dicots and monocots although its expression patterns and cellular localization differ with plant species. The subsequent transport of Si out of the root cells towards the stele is medicated by an active efflux transporter, Lsi2. Lsi1 and Lsi2 are polarly localized at the distal and proximal sides, respectively, of both exodermis and endodermis in rice root. Silicon in the xylem sap is presented in the form of monosilicic acid and is unloaded by Lsi6, a homolog of Lsi1 in rice. Lsi6 is also involved in the inter-vascular transfer of Si at the node, which is necessary for preferential Si distribution to the panicles.

Original languageEnglish
Pages (from-to)377-385
Number of pages9
JournalProceedings of the Japan Academy Series B: Physical and Biological Sciences
Volume87
Issue number7
DOIs
Publication statusPublished - 2011

Fingerprint

Silicon
silicon
inflorescences
transporter
soils
Soil
rice
transporters
efflux
Xylem
endodermis
Aquaporins
stele
aquaporins
Magnoliopsida
Liliopsida
cells
blood vessels
mineral soils
sap

Keywords

  • Distribution
  • Localization
  • Silicon
  • Transporter
  • Uptake

ASJC Scopus subject areas

  • General

Cite this

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abstract = "Silicon (Si) is the most abundant minerals in soil and exerts beneficial effects on plant growth by alleviating various stresses. The transport of Si from soil to the panicles is mediated by different transporters. Lsi1, belonging to a NIP group of the aquaporin family, is responsible for the uptake of Si from soil into the root cells in both dicots and monocots although its expression patterns and cellular localization differ with plant species. The subsequent transport of Si out of the root cells towards the stele is medicated by an active efflux transporter, Lsi2. Lsi1 and Lsi2 are polarly localized at the distal and proximal sides, respectively, of both exodermis and endodermis in rice root. Silicon in the xylem sap is presented in the form of monosilicic acid and is unloaded by Lsi6, a homolog of Lsi1 in rice. Lsi6 is also involved in the inter-vascular transfer of Si at the node, which is necessary for preferential Si distribution to the panicles.",
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AU - Ma, Jian Feng

AU - Yamaji, Naoki

AU - Mitani, Namiki

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KW - Distribution

KW - Localization

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KW - Transporter

KW - Uptake

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