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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 4 (July 1991)
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    Effect of water on morphological development in seedlings of three range grasses: Root branching patterns

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    Author
    Johnson, D. A.
    Aguirre, L.
    Issue Date
    1991-07-01
    Keywords
    root branching structure
    branching
    Pseudoroegneria spicata
    soil water potential
    seedling growth
    roots
    water requirements
    plant morphology
    Agropyron desertorum
    water availability
    Agropyron cristatum
    root systems
    Bromus tectorum
    Poaceae
    establishment
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    Citation
    Johnson, D. A., & Aguirre, L. (1991). Effect of water on morphological development in seedlings of three range grasses: Root branching patterns. Journal of Range Management, 44(4), 355-360.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644699
    DOI
    10.2307/4002398
    Additional Links
    https://rangelands.org/
    Abstract
    Root morphology is important for successful seedling establishment and survival on semiarid rangelands. This study was conducted to determine the response of early seedling root morphological development of 'Hycrest' [Agropyron desertorum (Fisch. ex Link) Schult. X A. cristatum (L.) Gaert.], 'Whitmar' [Pseudoroegneria spicata (Pursh) Loeve], and cheatgrass (Bromus tectorum L.) to water. A greenhouse line-source sprinkler system provided a gradient of water application (77, 66, 37, and 5 ml/day). Root morphology was examined at 15, 30, and 45 days after seedling emergence. Order of branching of roots associated with the first foliar node was greater in cheatgrass than in Hycrest or Whitmar at all water applications and dates. Length of the primary root, length of the second group of seminal roots, and length of the first group of adventitious roots were similar in cheatgrass and Hycrest. Root branching for the 3 species decreased as less water was applied, except for cheatgrass irrigated with 5 ml/day. The ability of cheatgrass seedlings to grow with little water was related to their greater order of branching of seminal roots, branching density on the main axis, and length of lateral roots and external-external links. The greater root branching densities, lateral root lengths, and external-external link lengths enabled Hycrest seedlings to grow better than Whitmar seedlings with little water. These root morphological characteristics may prove useful in improving seedling establishment of perennial range grasses.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002398
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 4 (July 1991)

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