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- W2960892746 abstract "Date palm (Phoenix dactylifera) can accumulate as much as 1% silicon (Si), but not much is known about the mechanisms inherent to this process. Here, we investigated in detail the uptake, accumulation and distribution of Si in date palms, and the phylogeny of Si transporter genes in plants. We characterized the PdNIP2 transporter following heterologous expression in Xenopus oocytes and used qPCR to determine the relative expression of Si transporter genes. Silicon accumulation and distribution was investigated by light microscopy, scanning electron microscopy coupled with X-ray microanalysis and Raman microspectroscopy. We proved that PdNIP2-1 codes for a functional Si-permeable protein and demonstrated that PdNIP2 transporter genes were constitutively expressed in date palm. Silicon aggregates/phytoliths were found in specific stegmata cells present in roots, stems and leaves and their surfaces were composed of pure silica. Stegmata were organized on the outer surface of the sclerenchyma bundles or associated with the sclerenchyma of the vascular bundles. Phylogenetic analysis clustered NIP2 transporters of the Arecaceae in a sister position to those of the Poaceae. It is suggested, that Si uptake in date palm is mediated by a constitutively expressed Si influx transporter and accumulated as Si aggregates in stegmata cells abundant in the outer surface of the sclerenchyma bundles (fibers)." @default.
- W2960892746 created "2019-07-23" @default.
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- W2960892746 date "2019-08-13" @default.
- W2960892746 modified "2023-10-18" @default.
- W2960892746 title "Silicon Uptake and Localisation in Date Palm (Phoenix dactylifera) – A Unique Association With Sclerenchyma" @default.
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- W2960892746 doi "https://doi.org/10.3389/fpls.2019.00988" @default.
- W2960892746 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6701203" @default.
- W2960892746 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31456812" @default.
- W2960892746 hasPublicationYear "2019" @default.
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