Root cap removal increases root penetration resistance in maize (Zea mays L.)

Morio Iijima, Toshifumi Higuchi, Peter W. Barlow, A. Glyn Bengough

    Research output: Contribution to journalArticle

    43 Citations (Scopus)

    Abstract

    The root cap assists the passage of the root through soil by means of its slimy mucilage secretion and by the sloughing of its outer cells. The root penetration resistance of decapped primary roots of maize (Zea mays L. cv. Mephisto) was compared with that of intact roots in loose (dry bulk density 1.0 g cm-3; penetration resistance 0.06 MPa) and compact soil (1.4 g cm-3; penetration resistance 1.0 MPa), to evaluate the contribution of the cap to decreasing the impedance to root growth. Root elongation rate and diameter were the same for decapped and intact roots when the plants were grown in loose soil. In compacted soil, however, the elongation rate of decapped roots was only about half that of intact roots, whilst the diameter was 30% larger. Root penetration resistances of intact and decapped seminal axis were 0.31 and 0.52 MPa, respectively, when the roots were grown in compacted soil. These results indicated that the presence of a root cap alleviates much of the mechanical impedance to root penetration, and enables roots to grow faster in compacted soils.

    Original languageEnglish
    Pages (from-to)2105-2109
    Number of pages5
    JournalJournal of Experimental Botany
    Volume54
    Issue number390
    DOIs
    Publication statusPublished - Jul 2003

    Cite this

    Iijima, Morio ; Higuchi, Toshifumi ; Barlow, Peter W. ; Bengough, A. Glyn . / Root cap removal increases root penetration resistance in maize (Zea mays L.). In: Journal of Experimental Botany. 2003 ; Vol. 54, No. 390. pp. 2105-2109.
    @article{e08480aec5cb4f23842e416a01d67fd8,
    title = "Root cap removal increases root penetration resistance in maize (Zea mays L.)",
    abstract = "The root cap assists the passage of the root through soil by means of its slimy mucilage secretion and by the sloughing of its outer cells. The root penetration resistance of decapped primary roots of maize (Zea mays L. cv. Mephisto) was compared with that of intact roots in loose (dry bulk density 1.0 g cm-3; penetration resistance 0.06 MPa) and compact soil (1.4 g cm-3; penetration resistance 1.0 MPa), to evaluate the contribution of the cap to decreasing the impedance to root growth. Root elongation rate and diameter were the same for decapped and intact roots when the plants were grown in loose soil. In compacted soil, however, the elongation rate of decapped roots was only about half that of intact roots, whilst the diameter was 30{\%} larger. Root penetration resistances of intact and decapped seminal axis were 0.31 and 0.52 MPa, respectively, when the roots were grown in compacted soil. These results indicated that the presence of a root cap alleviates much of the mechanical impedance to root penetration, and enables roots to grow faster in compacted soils.",
    author = "Morio Iijima and Toshifumi Higuchi and Barlow, {Peter W.} and Bengough, {A. Glyn}",
    year = "2003",
    month = "7",
    doi = "10.1093/jxb/erg226",
    language = "English",
    volume = "54",
    pages = "2105--2109",
    journal = "Journal of Experimental Botany",
    issn = "0022-0957",
    publisher = "Oxford University Press",
    number = "390",

    }

    Root cap removal increases root penetration resistance in maize (Zea mays L.). / Iijima, Morio; Higuchi, Toshifumi; Barlow, Peter W.; Bengough, A. Glyn .

    In: Journal of Experimental Botany, Vol. 54, No. 390, 07.2003, p. 2105-2109.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Root cap removal increases root penetration resistance in maize (Zea mays L.)

    AU - Iijima, Morio

    AU - Higuchi, Toshifumi

    AU - Barlow, Peter W.

    AU - Bengough, A. Glyn

    PY - 2003/7

    Y1 - 2003/7

    N2 - The root cap assists the passage of the root through soil by means of its slimy mucilage secretion and by the sloughing of its outer cells. The root penetration resistance of decapped primary roots of maize (Zea mays L. cv. Mephisto) was compared with that of intact roots in loose (dry bulk density 1.0 g cm-3; penetration resistance 0.06 MPa) and compact soil (1.4 g cm-3; penetration resistance 1.0 MPa), to evaluate the contribution of the cap to decreasing the impedance to root growth. Root elongation rate and diameter were the same for decapped and intact roots when the plants were grown in loose soil. In compacted soil, however, the elongation rate of decapped roots was only about half that of intact roots, whilst the diameter was 30% larger. Root penetration resistances of intact and decapped seminal axis were 0.31 and 0.52 MPa, respectively, when the roots were grown in compacted soil. These results indicated that the presence of a root cap alleviates much of the mechanical impedance to root penetration, and enables roots to grow faster in compacted soils.

    AB - The root cap assists the passage of the root through soil by means of its slimy mucilage secretion and by the sloughing of its outer cells. The root penetration resistance of decapped primary roots of maize (Zea mays L. cv. Mephisto) was compared with that of intact roots in loose (dry bulk density 1.0 g cm-3; penetration resistance 0.06 MPa) and compact soil (1.4 g cm-3; penetration resistance 1.0 MPa), to evaluate the contribution of the cap to decreasing the impedance to root growth. Root elongation rate and diameter were the same for decapped and intact roots when the plants were grown in loose soil. In compacted soil, however, the elongation rate of decapped roots was only about half that of intact roots, whilst the diameter was 30% larger. Root penetration resistances of intact and decapped seminal axis were 0.31 and 0.52 MPa, respectively, when the roots were grown in compacted soil. These results indicated that the presence of a root cap alleviates much of the mechanical impedance to root penetration, and enables roots to grow faster in compacted soils.

    U2 - 10.1093/jxb/erg226

    DO - 10.1093/jxb/erg226

    M3 - Article

    VL - 54

    SP - 2105

    EP - 2109

    JO - Journal of Experimental Botany

    JF - Journal of Experimental Botany

    SN - 0022-0957

    IS - 390

    ER -