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    • Journal of Range Management, Volume 47 (1994)
    • Journal of Range Management, Volume 47, Number 6 (November 1994)
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    Physiological comparisons of crested wheatgrass and western wheatgrass to water

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    Author
    Frank, A. B.
    Issue Date
    1994-11-01
    Keywords
    proline
    soil water potential
    carbohydrates
    Agropyron desertorum
    drought tolerance
    rain
    species differences
    Pascopyrum smithii
    seasonal variation
    water stress
    
    Metadata
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    Citation
    Frank, A. B. (1994). Physiological comparisons of crested wheatgrass and western wheatgrass to water. Journal of Range Management, 47(6), 460-466.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644439
    DOI
    10.2307/4002997
    Additional Links
    https://rangelands.org/
    Abstract
    Knowledge about mechanisms of water stress tolerance, growth, and development of forages are important in development of management practices and in germplasm improvement. Plants of crested wheatgrass [Agropyron desertorum (Fischer ex Link) Schultes] and western wheatgrass [Pascopyrum smithii (Rydb.) Gould] were field grown at 3 soil water levels (50, 100, and 150% of average rainfall and 2 N levels (10 and 110 kg N ha-1) and sampled to determine proline, water soluble carbohydrate, and abscisic acid concentration from about the 4-leaf through heading stages of development. Proline concentration increased in both species as wabr stress increased. Proline decreased in crested wheatgrass but increased in western wheatgrass as plant development advanced. Abscisic acid concentrations increased in both species as water stress increased. Western wheatgrass contained about 1.7 times higher abscisic acid concentration than crested wheatgrass. Carbohydrate concentrations increased with water stress and were higher in crested than western wheatgrass. Increasing proline and abscisic acid concentrations in western wheatgrass and the decreasing concentrations in crested wheatgrass at later stages of development suggest that the stress response mechanisms that enhance proline and abscisic acid may be more operative in western than crested wheatgrass. These results suggesting that western wheatgrass is more tolerant of water stress under field conditions than crested wheatgrass should be useful in developing sustainable management practices. Also, proline concentration changes with plant development suggesting that germplasm sampling should be performed over time.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002997
    Scopus Count
    Collections
    Journal of Range Management, Volume 47, Number 6 (November 1994)

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