Summer dormancy and winter growth: root survival strategy in a perennial monocotyledon

Michael Shane, M.E. Mccully, M.J. Canny, John Pate, Hai Ngo, U. Mathesius, Greg Cawthray, Hans Lambers

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Here, we tested the alternation of root summer dormancy and winter growth as a critical survival strategy for a long-lived monocotyledon (Restionaceae) adapted to harsh seasonal extremes of Mediterranean southwest Western Australia.• Measurements of growth and the results of comparative studies of the physiology, water content, metabolites, osmotic adjustments, and proteomics of the dormant and growing perennial roots of Lyginia barbata (Restionaceae) were assessed in field-grown plants.• Formation of dormant roots occurred before the onset of summer extremes. They resumed growth (average 2.3 mm d−1) the following winter to eventually reach depths of 2–4 m. Compared with winter-growing roots, summer dormant roots had decreased respiration and protein concentration and c. 70% water content, sustained by sand-sheaths, osmotic adjustment and presumably hydraulic redistribution. Concentrations of compatible solutes (e.g. sucrose and proline) were significantly greater during dormancy, presumably mitigating the effects of heat and drought. Fifteen root proteins showed differential abundance and were correlated with either winter growth or summer dormancy. None matched currently available libraries.• The specific features of the root dormancy strategy of L. barbata revealed in this study are likely to be important to understanding similar behaviour in roots of many long-lived monocotyledons, including overwintering and oversummering crop species.
    Original languageEnglish
    Pages (from-to)1085-1096
    JournalNew Phytologist
    Volume183
    Issue number4
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Liliopsida
    dormancy
    root growth
    winter
    summer
    Growth
    Comparative Physiology
    Restionaceae
    Western Australia
    Water
    Droughts
    Proline
    Proteomics
    Libraries
    Sucrose
    Respiration
    Proteins
    Hot Temperature
    water content
    overwintering

    Cite this

    Shane, Michael ; Mccully, M.E. ; Canny, M.J. ; Pate, John ; Ngo, Hai ; Mathesius, U. ; Cawthray, Greg ; Lambers, Hans. / Summer dormancy and winter growth: root survival strategy in a perennial monocotyledon. In: New Phytologist. 2009 ; Vol. 183, No. 4. pp. 1085-1096.
    @article{a3817f6b50fa4e438dc147f0918e4c93,
    title = "Summer dormancy and winter growth: root survival strategy in a perennial monocotyledon",
    abstract = "Here, we tested the alternation of root summer dormancy and winter growth as a critical survival strategy for a long-lived monocotyledon (Restionaceae) adapted to harsh seasonal extremes of Mediterranean southwest Western Australia.• Measurements of growth and the results of comparative studies of the physiology, water content, metabolites, osmotic adjustments, and proteomics of the dormant and growing perennial roots of Lyginia barbata (Restionaceae) were assessed in field-grown plants.• Formation of dormant roots occurred before the onset of summer extremes. They resumed growth (average 2.3 mm d−1) the following winter to eventually reach depths of 2–4 m. Compared with winter-growing roots, summer dormant roots had decreased respiration and protein concentration and c. 70{\%} water content, sustained by sand-sheaths, osmotic adjustment and presumably hydraulic redistribution. Concentrations of compatible solutes (e.g. sucrose and proline) were significantly greater during dormancy, presumably mitigating the effects of heat and drought. Fifteen root proteins showed differential abundance and were correlated with either winter growth or summer dormancy. None matched currently available libraries.• The specific features of the root dormancy strategy of L. barbata revealed in this study are likely to be important to understanding similar behaviour in roots of many long-lived monocotyledons, including overwintering and oversummering crop species.",
    author = "Michael Shane and M.E. Mccully and M.J. Canny and John Pate and Hai Ngo and U. Mathesius and Greg Cawthray and Hans Lambers",
    year = "2009",
    doi = "10.1111/j.1469-8137.2009.02875.x",
    language = "English",
    volume = "183",
    pages = "1085--1096",
    journal = "The New Phytologist",
    issn = "0028-646X",
    publisher = "John Wiley & Sons",
    number = "4",

    }

    Summer dormancy and winter growth: root survival strategy in a perennial monocotyledon. / Shane, Michael; Mccully, M.E.; Canny, M.J.; Pate, John; Ngo, Hai; Mathesius, U.; Cawthray, Greg; Lambers, Hans.

    In: New Phytologist, Vol. 183, No. 4, 2009, p. 1085-1096.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Summer dormancy and winter growth: root survival strategy in a perennial monocotyledon

    AU - Shane, Michael

    AU - Mccully, M.E.

    AU - Canny, M.J.

    AU - Pate, John

    AU - Ngo, Hai

    AU - Mathesius, U.

    AU - Cawthray, Greg

    AU - Lambers, Hans

    PY - 2009

    Y1 - 2009

    N2 - Here, we tested the alternation of root summer dormancy and winter growth as a critical survival strategy for a long-lived monocotyledon (Restionaceae) adapted to harsh seasonal extremes of Mediterranean southwest Western Australia.• Measurements of growth and the results of comparative studies of the physiology, water content, metabolites, osmotic adjustments, and proteomics of the dormant and growing perennial roots of Lyginia barbata (Restionaceae) were assessed in field-grown plants.• Formation of dormant roots occurred before the onset of summer extremes. They resumed growth (average 2.3 mm d−1) the following winter to eventually reach depths of 2–4 m. Compared with winter-growing roots, summer dormant roots had decreased respiration and protein concentration and c. 70% water content, sustained by sand-sheaths, osmotic adjustment and presumably hydraulic redistribution. Concentrations of compatible solutes (e.g. sucrose and proline) were significantly greater during dormancy, presumably mitigating the effects of heat and drought. Fifteen root proteins showed differential abundance and were correlated with either winter growth or summer dormancy. None matched currently available libraries.• The specific features of the root dormancy strategy of L. barbata revealed in this study are likely to be important to understanding similar behaviour in roots of many long-lived monocotyledons, including overwintering and oversummering crop species.

    AB - Here, we tested the alternation of root summer dormancy and winter growth as a critical survival strategy for a long-lived monocotyledon (Restionaceae) adapted to harsh seasonal extremes of Mediterranean southwest Western Australia.• Measurements of growth and the results of comparative studies of the physiology, water content, metabolites, osmotic adjustments, and proteomics of the dormant and growing perennial roots of Lyginia barbata (Restionaceae) were assessed in field-grown plants.• Formation of dormant roots occurred before the onset of summer extremes. They resumed growth (average 2.3 mm d−1) the following winter to eventually reach depths of 2–4 m. Compared with winter-growing roots, summer dormant roots had decreased respiration and protein concentration and c. 70% water content, sustained by sand-sheaths, osmotic adjustment and presumably hydraulic redistribution. Concentrations of compatible solutes (e.g. sucrose and proline) were significantly greater during dormancy, presumably mitigating the effects of heat and drought. Fifteen root proteins showed differential abundance and were correlated with either winter growth or summer dormancy. None matched currently available libraries.• The specific features of the root dormancy strategy of L. barbata revealed in this study are likely to be important to understanding similar behaviour in roots of many long-lived monocotyledons, including overwintering and oversummering crop species.

    U2 - 10.1111/j.1469-8137.2009.02875.x

    DO - 10.1111/j.1469-8137.2009.02875.x

    M3 - Article

    VL - 183

    SP - 1085

    EP - 1096

    JO - The New Phytologist

    JF - The New Phytologist

    SN - 0028-646X

    IS - 4

    ER -