中文摘要：

K+ 是在植物房间的最丰富的阳离子并且以许多方法起一个重要作用。植物的 K+ 举起有尊重到它的盐抵抗能力。有为到举起 K+ 的植物的隧道交通的二个范畴，一个人通过 K+ 隧道，其它通过 nonselective 阳离子隧道(NSCC ) 。K+ 的 transmembrane 本地化可以改变膜潜力(MP ) 。在这份报纸，有不同的盐忍耐的三个小麦变化被选择， MP 被 microelectrode 在 K+ 举起期间测量。结果证明通过 K+ 隧道或 NSCC 的 MP 上的 K+ 举起的效果是不同的。通过 K+ 隧道的 K+ 流入导致了 MP hyperpolarization，当通过 NSCC 的 K+ 流入导致了去极时。有不同的盐忍耐的小麦变化的多样的 MP 改变主要由于调停 NSCCs 的 K+ 举起。与盐容忍的小麦相比， MP hyperpolarization 在盐敏感的小麦的 K+ 举起期间是更明显的，可能因为通过 NSCC 的阳离子 outflux 在这个过程期间。

英文摘要：

K＋ is the most abundant cation in plant cells and plays an important role in many ways.K＋ uptake of plant has respect to its salt resistant capacity.There are two categories of channel transportation for plants to uptake K＋,one is through K＋ channels and the other is through nonselective cation channels（NSCCs）.The transmembrane localization of K＋ may change membrane potential（MP）.In this paper,three wheat varieties with different salt tolerance were selected and the MP was measured by microelectrode during K＋ uptake.The results showed that the effects of K＋ uptake on MP through K＋ channels or NSCCs were distinct.K＋ influx through K＋ channels led to MP hyperpolarization,while K＋ influx through NSCCs resulted in depolarization.Diverse MP alteration of wheat varieties with different salt tolerance was mainly due to NSCCs-mediated K＋ uptake.Compared with the salt-tolerant wheat,the MP hyperpolarization during K＋ uptake of saltsensitive wheat was much more evident,probably because of the cation outflux through NSCCs during this process.