不同盐浓度对马铃薯实生苗的影响

三个不同组合的马铃薯实生种子分别播在含有０（ＣＫ），０．２％，０．４％和０．６％ＮａＣｌ处理的土壤和ＭＳ培养基中，以调查ＮａＣｌ对实生种子发芽以及生长发育的影响。结果表明：随着基质中盐浓度的增加，实生种子生长受到抑制就越厉害，土壤中盐浓度达到０．４％时，幼苗的存活率仅为１４．３％～２７．８％，达到０．６％时幼苗全部死亡；ＭＳ培养基中盐分达致电０．４％时，幼苗的存活率为４０％～４６．７％，达到０．６％时为１０％～２３．３％。笔者认为从实生种子中筛选抗（耐）盐品种（系）应先从培养基中开始，做初步淘汰工作，为最终的田间筛选节约大量的时间和工作．

THE EFFECTS OF DIFFERENT SALT RATE ON THE GROWTH OF TPS SEEDLINGS

The true potato seeds (TPS) of three lines were sowed separately in the soils and the MSmedium containing 0, 0.2, 0.4 and 0.6% sodium chloride. The detailed investigation was conducted to evaluate the innucncc of salt on the cmcrgcncc and the growth of the seedlings. Theresult indicated that the plant growth was retarded steadily with more salt concentration. Thesurvival rate of seedling was only 14.3-27.8% when the salt concentration reached 0.4% andcompletely died as the salt reached 0.6%. Moreover, when the salt concentration in MS medium reached 0.4%,the survival rate of seedlings were 40～46.7%. As increased to 0.6%, thesurvival rates were 10～ 23.3%. The author held that the best way to screen and select the salttolerance lines or cloncs was to start from MS medium. In this way, a lot of work and timecan be saved for the field selections.