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    • Journal of Range Management, Volume 43 (1990)
    • Journal of Range Management, Volume 43, Number 2 (March 1990)
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    Stratification, freezing, and drying effects on germination and seedling growth of Altai wildrye

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    Author
    Romo, J. T.
    Issue Date
    1990-03-01
    Keywords
    freezing
    solutes
    leakage
    osmotic treatment
    stratification
    desiccation
    crop establishment
    Leymus angustus
    etiolation
    roots
    shoots
    air temperature
    seeds
    growth rate
    seed germination
    water stress
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    Citation
    Romo, J. T. (1990). Stratification, freezing, and drying effects on germination and seedling growth of Altai wildrye. Journal of Range Management, 43(2), 167-171.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644937
    DOI
    10.2307/3899038
    Additional Links
    https://rangelands.org/
    Abstract
    Altai wildrye (Leymus angustus (Trin.) Pilger) is recommended for late season forage and stabilization or improvement of salt affected land in the northern Great Plains. Establishment from seeding is erratic, perhaps due to environmental extremes that occur in the seedbed. Objectives of this study were to evaluate the effect of temperature and moisture variation on germination, solute leakage from seeds, and etiolated growth of seedlings of this perennial grass. Seeds were subjected to 5 preincubation treatments: stratification (5 degrees C) (STR); stratification plus drying (30 degrees C) (STR-D); stratification plus freezing (-10 degrees C) (STR-FR); cool-dry storage (5 degrees C) (COOL); and laboratory storage (LAB). After pretreatment, seeds were incubated at 10 and 20 degrees C in a gradient of osmotic potentials ranging from 0.0 to -1.59 MPa. Solute leakage from seeds and seedling growth were also assessed following pretreatment. Germination was higher and more rapid over the range of osmotic potentials at 20 degrees C than at 10 degrees C with germination poorest in STR-FR. In the absence of water stress, leakage of solutes was 21% lower from stratified seeds than unstratified seeds; leakage at -0.48 MPa was similar across pretreatments. Compared to the other pretreatments, root and shoot growth of seedlings following STR-FR were reduced 34 and 76% at -0.48 MPa. Negative effects of STR-FR were reflected in restricted germination and growth, but not in solute leakage. Results of this study and others suggest that efforts to minimize temperature extremes in the seedbed could improve germination and seedling growth of Altai wildrye.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899038
    Scopus Count
    Collections
    Journal of Range Management, Volume 43, Number 2 (March 1990)

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