Root System Patterning: Auxin Synthesis at the Root Periphery
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چکیده
منابع مشابه
Root System Patterning: Auxin Synthesis at the Root Periphery
Plasticity in plant form is achieved through differential elaboration of developmental pre-patterns during postembryonic organ development. A new report links the output of the root clock, an oscillatory transcriptional pre-patterning mechanism, with cell-type-specific production of the plant hormone auxin, and identifies a downstream component required for elaboration of the pre-pattern.
متن کاملRoot patterning: Does auxin provide positional cues?
Patterning of Arabidopsis roots is mediated by cell-cell interactions, information flowing from differentiated to immature cells. The plant growth regulator auxin has now been shown to be involved in organizing the distal end of the root apex, including the extent and pattern of cell division programs and specification of cell identity.
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The radial pattern of the plant root is determined by the action of two transcription factors, SHORT ROOT and SCARECROW, which are produced in different cell types. The SHORT ROOT protein has now been shown to move from cell to cell, regulating transcription of the downstream SCARECROW gene in the target cells.
متن کاملAuxin metabolism in the root apical meristem.
Within the root meristem of flowering plants is a group of mitotically inactive cells designated the quiescent center (QC). Recent work links the quiescent state to high levels of the growth regulator auxin that accumulates in the QC via polar transport. This in turn results in elevated levels of the enzyme ascorbic acid oxidase (AAO), resulting in a reduction of ascorbic acid (AA) within the Q...
متن کاملModeling auxin fluxes and Arabidopsis root ramification at different scales
Plant primary growth occurs in two opposite directions, stems and roots both generating branched patterns during their development. However, where stem development appears extremely regular, based on phyllotactic patterns, root architecture appears somewhat random, controlled essentially by external clues such as nutrients concentration (Malamy et al. 2005). The regularity of stem development h...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2015
ISSN: 0960-9822
DOI: 10.1016/j.cub.2015.04.013