Tulip trees and salt
Liriodendron tulipifera Tulip Tree, Yellow-poplar is listed as salt sensitive.
Salt spray commonly causes bud death and twig dieback in deciduous plants. The symptoms initially include an abnormal foliage color, needle tipburn, and marginal leaf burn progressing toward the mid-vein of affected leaves (figure 2). Progressive symptoms may include a reduction in leaf, flower, and fruit size; premature fall coloration and defoliation; stunting; and a general decline in health.
Liriodendron tulipifera Tulip Tree, Yellow-poplar is listed as salt sensitive
Salt identification by the USDA:
More here: http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/minimizing-de-icing-salt-injury-to-trees/
Hope this helps.
Courtesy of the NYBG Plant Information Service