Transport of silicon from roots to panicles in plants

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    127 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

    Keywords

    • Distribution
    • Localization
    • Silicon
    • Transporter
    • Uptake

    ASJC Scopus subject areas

    • Agricultural and Biological Sciences(all)
    • Physics and Astronomy(all)

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