Water flow in the roots of crop species: the influence of root structure, aquaporin activity, and waterlogging

Helen Bramley, David Turner, S.D. Tyerman, N.C. Turner

    Research output: Contribution to journalArticle

    57 Citations (Scopus)

    Abstract

    The hydraulic properties of plant roots depend on the morphology and anatomy of the root system, the length of the absorbing region and the influence of aquaporins (AQPs). These features change during development and in response to environmental stimuli, and alter the hydraulic conductivity of the root system (Lpr). AQPs are proteins that form water selective channels to facilitate water flow across membranes. A large proportion of AQP isoforms are predominantly expressed in roots and their localization indicates a putative role in the transport of water across the root. AQP activity can finely regulate the rate of water flow across the root by changes in abundance and opening/closing the water channels. Since water will flow by the pathway of least resistance, AQPs will only influence radial water flow if the hydraulic conductivity of the apoplast is relatively less than that of the cell-to-cell pathway. There is growing evidence that AQPs influence water flow through the roots of some, but not all, species.Waterlogging is a significant environmental constraint to crop growth, but its influence on Lpr is poorly understood. Depending on the tolerance of the species, waterlogging through oxygen deficiency reduces root growth and tends to reduce Lpr. Oxygen deficiency can directly or indirectly close AQPs or alter their abundance. Changes in AQP activity may be the key component which ultimately influences water transport through waterlogged roots.
    Original languageEnglish
    Pages (from-to)133-196
    JournalAdvances in Agronomy
    Volume96
    DOIs
    Publication statusPublished - 2007

    Fingerprint

    aquaporins
    waterlogging
    flooded conditions
    water flow
    crop
    crops
    root system
    hydraulic conductivity
    water
    root systems
    hypoxia
    radial flow
    environmental constraint
    hydraulic property
    apoplast
    anatomy
    tolerance
    root growth
    fluid mechanics
    membrane

    Cite this

    @article{3040fb8d3b224210bd2bd47b1ba42d7e,
    title = "Water flow in the roots of crop species: the influence of root structure, aquaporin activity, and waterlogging",
    abstract = "The hydraulic properties of plant roots depend on the morphology and anatomy of the root system, the length of the absorbing region and the influence of aquaporins (AQPs). These features change during development and in response to environmental stimuli, and alter the hydraulic conductivity of the root system (Lpr). AQPs are proteins that form water selective channels to facilitate water flow across membranes. A large proportion of AQP isoforms are predominantly expressed in roots and their localization indicates a putative role in the transport of water across the root. AQP activity can finely regulate the rate of water flow across the root by changes in abundance and opening/closing the water channels. Since water will flow by the pathway of least resistance, AQPs will only influence radial water flow if the hydraulic conductivity of the apoplast is relatively less than that of the cell-to-cell pathway. There is growing evidence that AQPs influence water flow through the roots of some, but not all, species.Waterlogging is a significant environmental constraint to crop growth, but its influence on Lpr is poorly understood. Depending on the tolerance of the species, waterlogging through oxygen deficiency reduces root growth and tends to reduce Lpr. Oxygen deficiency can directly or indirectly close AQPs or alter their abundance. Changes in AQP activity may be the key component which ultimately influences water transport through waterlogged roots.",
    author = "Helen Bramley and David Turner and S.D. Tyerman and N.C. Turner",
    year = "2007",
    doi = "10.1016/S0065-2113(07)96002-2",
    language = "English",
    volume = "96",
    pages = "133--196",
    journal = "Advances in Agronomy",
    issn = "0065-2113",
    publisher = "Academic Press",

    }

    Water flow in the roots of crop species: the influence of root structure, aquaporin activity, and waterlogging. / Bramley, Helen; Turner, David; Tyerman, S.D.; Turner, N.C.

    In: Advances in Agronomy, Vol. 96, 2007, p. 133-196.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Water flow in the roots of crop species: the influence of root structure, aquaporin activity, and waterlogging

    AU - Bramley, Helen

    AU - Turner, David

    AU - Tyerman, S.D.

    AU - Turner, N.C.

    PY - 2007

    Y1 - 2007

    N2 - The hydraulic properties of plant roots depend on the morphology and anatomy of the root system, the length of the absorbing region and the influence of aquaporins (AQPs). These features change during development and in response to environmental stimuli, and alter the hydraulic conductivity of the root system (Lpr). AQPs are proteins that form water selective channels to facilitate water flow across membranes. A large proportion of AQP isoforms are predominantly expressed in roots and their localization indicates a putative role in the transport of water across the root. AQP activity can finely regulate the rate of water flow across the root by changes in abundance and opening/closing the water channels. Since water will flow by the pathway of least resistance, AQPs will only influence radial water flow if the hydraulic conductivity of the apoplast is relatively less than that of the cell-to-cell pathway. There is growing evidence that AQPs influence water flow through the roots of some, but not all, species.Waterlogging is a significant environmental constraint to crop growth, but its influence on Lpr is poorly understood. Depending on the tolerance of the species, waterlogging through oxygen deficiency reduces root growth and tends to reduce Lpr. Oxygen deficiency can directly or indirectly close AQPs or alter their abundance. Changes in AQP activity may be the key component which ultimately influences water transport through waterlogged roots.

    AB - The hydraulic properties of plant roots depend on the morphology and anatomy of the root system, the length of the absorbing region and the influence of aquaporins (AQPs). These features change during development and in response to environmental stimuli, and alter the hydraulic conductivity of the root system (Lpr). AQPs are proteins that form water selective channels to facilitate water flow across membranes. A large proportion of AQP isoforms are predominantly expressed in roots and their localization indicates a putative role in the transport of water across the root. AQP activity can finely regulate the rate of water flow across the root by changes in abundance and opening/closing the water channels. Since water will flow by the pathway of least resistance, AQPs will only influence radial water flow if the hydraulic conductivity of the apoplast is relatively less than that of the cell-to-cell pathway. There is growing evidence that AQPs influence water flow through the roots of some, but not all, species.Waterlogging is a significant environmental constraint to crop growth, but its influence on Lpr is poorly understood. Depending on the tolerance of the species, waterlogging through oxygen deficiency reduces root growth and tends to reduce Lpr. Oxygen deficiency can directly or indirectly close AQPs or alter their abundance. Changes in AQP activity may be the key component which ultimately influences water transport through waterlogged roots.

    U2 - 10.1016/S0065-2113(07)96002-2

    DO - 10.1016/S0065-2113(07)96002-2

    M3 - Article

    VL - 96

    SP - 133

    EP - 196

    JO - Advances in Agronomy

    JF - Advances in Agronomy

    SN - 0065-2113

    ER -