利用蔗糖密度梯度离心法制备小麦根质膜微囊，研究结果表明：郑引１号小麦根质膜Ｈ＋ＡＴＰａｓｅ潜在活性为２４％，内翻外型质膜囊泡占７６％。－１０ＭＰａＰＥＧ胁迫处理２４ｈ，两种定向的小麦根质膜Ｃａ２＋ＡＴＰａｓｅ活性均增加，正常水分条件下和ＰＥＧ胁迫处理后，ＥＧＴＡ对该酶活性抑制率分别为６２％和５３％，内翻外型质膜微囊对放射性核素４５Ｃａ２＋的转运量分别为２２０９ｎｍｏｌ／ｍｇｐｒｏ和４１７ｎｍｏｌ／ｍｇｐｒｏ，ＰＥＧ胁迫处理后，小麦根质膜微囊４５Ｃａ２＋转运量下降了８１％。 The sucrose density gradient centrifugation was used to prepare wheat root plasma membrane microcapsules. The results showed that the latent activity of H +ATPase of wheat root tracts was 24% and that of the invaded outer membrane was 76%. -10MPaPEG stress treatment 24h, the two directional wheat root plasma membrane Ca2 +  ATPase activity were increased under normal water conditions and PEG stress treatment, EGTA on the enzyme activity were 62% and 53% inhibition, varus The outward transport of 45Ca2 + by radicles was 2209nmol / mgpro and 417nmol / mgpro respectively, and the transport of 45Ca2 + by wheat stromal microcapsules decreased by 81% after PEG treatment.