The maladies caused by salt stress arise from the disruption of cellular aqueous and ionic equilibrium . na + accumulates excessively in the cytoplasm can be toxic to the metabolism and affects the regulation mechanism of the plant cell 盐胁迫条件下,植物细胞渗透均衡和离子正常均衡状态被破坏,特别是胞质中过多的na ~ +渗透调节对植物细胞的新陈代谢产生毒害,影响到植物细胞的调节机制。