Winter injury of landscape plants in the Pacific Northwest by Ray Maleike; Marianne Ophardt; Sharon Collman; Washington

By Ray Maleike; Marianne Ophardt; Sharon Collman; Washington State University. Cooperative Extension

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Extra resources for Winter injury of landscape plants in the Pacific Northwest

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Shoot K+ concentrations of all species decreased significantly with increase in salinity level, whereas root K+ of all species remained unaffected. Pennisetum divisum and Leptochloa fusca contained relatively higher shoot K+ at 16 and 24 dS m-1, respectively. Puccinellia distans showed relatively lower shoot K+ at 8 and 24 dSm-1. Panicum turgidum had the highest root K+ of all five species at 16 and 24 dSm-1. Shoot Ca2+ concentrations of Panicum turgidum and Puccinellia distans increased with increase in salinity level, whereas the remaining three species did not show any consistent pattern of increase or decrease in shoot Ca2+.

2002b. Improving seed germination of Salicornia rubra (Chenopodiaceae) under saline conditions using germination regulating chemicals. Western North American Naturalist 62: 101-105. , Gul, B. J. 2002c. Seed germination in the Great Basin halophyte Salsola iberica. Canadian Journal of Botany 80: 650-655. , Gul, B. J. 2004a. Action of plant growth regulators and salinity on the seed germination of Ceratoides lanata. Canadian Journal of Botany 82: 37-42. , Gul, B. J. 2004b. Temperature and high salinity effect in germinating dimorphic seeds of Atriplex rosea.

4 40 M. ASHRAF ET AL. Figure 2. Fresh and dry weights of shoots and roots of five grass species after six weeks growth at varying salinity levels in sand culture. Percent fresh and dry matters of Leptochloa fusca and Puccinellia distans remained unaffected at all salt treatments (Table 5). In contrast, percent biomass production in Pennisetum divisum was severely inhibited by salinity. Percent root biomass was inhibited in all the species except Panicum turgidum. Increasing salt treatments had no significant effect on shoot/root ratio of all five-grass species.

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