不同地理种群羊草苗期电导、电阻的比较研究

 本文将1994年从内蒙古不同地区采集到的羊草(Leymus chinensis)种子进行栽培试验，通过对幼苗进行PEG水分胁迫处理后，分别进行电阻、电导测试，发现不同样点的一年生羊草的电阻、电导对PEG水分胁迫在时间和浓度上的反应是不同的。聚类分析进一步表明不同地理种群羊草按电阻或电导的变化情况都可分成3大类，且所得结果相同：其中来自吉林和定位站的羊草最抗旱，阿旗与西乌旗的次之，谢尔塔拉的则最不耐旱，这与它们对各自自然生境的适应也是一致的。

Comparative Study of Yong Leymus chinensis’s Electrical Resistance and Conductivity of Different Geographic Population

The seeds of Leymus chinensis collected from different typical steppes in the Inner Mongolian Plateau in the same season were planted in campus of Fudan University, Shanghai and then their one-year-old seedlings were investigated. The changes of electrical resistance and conductivity in L. chinensis were measured after treated by polyoxyethylene glycols (PEG) of different concentration for six hours and twelve hours. The results show that the responses of electrical resistance and conductivity in L. chinensis from different geographic population was different. Using UPGMA, we found that those five geographic populations could be divided into three groups according to their changes in electrical resistance and conductivity. Among them, L, chinensis plants from Ji Lin and Ding Weizhan had strong resistance to drought, while those from Xiertala were weak . Those from A-Qi and Xiwu-Qi was intermediate.