1 water threatening - resistant characteristic : for instance , the outside tangency wall of epidermis cell prominently thicken ; the outside of epidermis cell are obviously covered by cuticle ; few stomats exists ; stomats are sunken ; and it has stmatic chamber structure , big aqueous tissues - parenchyma cell , mucilage cell , abnormal vascular , and soon 抗水分胁迫的抗盐结构特征。如表皮细胞外切向壁明显加厚，表皮外有明显的角质层覆盖；气孔稀少、气孔下陷及具有孔下室结构；大型贮水组织薄壁细胞、粘液细胞、异型维管束等。
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