<正>以新疆地区的梭梭叶片为研究对象，研究其内源激素与渗透调节物质对高温胁迫的响应。结果表明：在高温胁迫下，梭梭叶片内可溶性糖与脯氨酸含量随气温的升高而升高，GA含量表现为波浪式下降的趋势}在生长前期叶片内源脱落酸（ABA）含量甚微，盛夏期间ABA迅速积累，生长后期ABA急剧积累为生长发育过程的最高浓度；梭梭叶片内IAA的含量在整个生长季表现为下降的趋势；细胞分裂素（CTK）的含量变化趋势与IA含量动态变化规律类似；梭梭叶片内的m（CTK）/m（ABA）的值一直呈下降趋势。

The diversities of insect community of different degraded ecosystems in Arid-hot Valleys along Heqing Reach of the Jinshajiang River were studied. The results were as follows: Fifteen orders of insects were found in the 4 684 captured specimens,of which 71.30//oo were in Homoptera and 10.1% were in Hymenoptera, Hemiptera and Orthoptera were 6.8% and 4.2% respectively and those in the other 11 orders all together were less than 8.0%. The maximum of species diversity index and evenness index were found in the natural secondary forest, and the minimum of predominant index as well. The minimum of species diversity index and evenness index were found in the reforest land,and the maximum of predominant index as well. There was the same species richness between the hill-closing forest and natural secondary forest,which was higher than the others. For the composition of insects,the similarity coefficients were almost at an extremely dissimilar level among those plots. The mini mums of similarity coefficient were between the natural secondary forest and the rests. There were different species and individual of predominant species and common species among those plots. This investigation that the numbers of some pests were nearly great. Those were Leucapsis sp., Aphis sp., Coccus sp., Thoracaphis sp., Yunnanites coriacea and Hotea curculionoides (Herrich-Schaeffer). The studies showed that the insect diversity in natural ecosystem was sign!ficantly richer than that in the restoration and rehabilitation of degraded ecosystem. There were certain difference in insect diversity between different kinds of degraded eco