In order to know the copy of the gene in the S. salsa, southern was done, the results indicated that the protein was encoded with a gene family, there were at least three genes in the family.

• 得到SsNHX1片段后，对其在碱蓬中的拷贝数及表达特性进行了分析，Southern结果表明SsNHX1在碱蓬中至少有3个拷贝，应是一个基因家族。