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  • Author or Editor: Michael D. Remmick x
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A film-forming antidesiccant (Moisturin-4; Burke's Protective Coatings, Washougal, Wash.), 1:1 (v/v) with water, was applied to dormant, bare-root, 2-year seedlings of Washington hawthorn (Crataegus phaenopyrum), a difficult-to-establish species. Antidesiccant applications were made to nonstressed controls or to stressed plants (13 h air-drying at 19C and 20% RH) either before or after drying. Antidesiccant was applied to stems only (SO), roots and stems (RS), or not at all (stressed controls). Three subgroups of treated plants were measured to assess changes in fresh weight (FW), xylem water potential (XWP), or specific conductivity (k s) of stems before stress, after stress, or 2 to 3 weeks following planting in the greenhouse. Applications of antidesiccant to SO allowed stressed plants to recover prestress levels of FW after 2 to 3 weeks, whereas stressed plants receiving the RS treatment did not fully recover prestress levels of FW. XWP of stressed SO plants tended to increase following outplanting. k s was highly variable, but tended to be higher in nonstressed plants. Nonstressed and SO seedlings had higher percentages of budbreak.

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