Halophytes are adapted to obtain water from soil water with a higher osmotic pressure than normal soil water, so they ne盐土植物的渗透压高于土壤，这样就可以从土壤中吸收水分，所以它们的根细胞中积累了高浓度的盐分。
Isotonic Designating a solution with an osmotic pressure or concentration equal to that of a specified other solution, u等渗的：指与特定溶液浓度相等的或是渗透压相同的溶液，通常存在于细胞中。