Elucidation of osmo-regulation mechanisms and improvement of drought and salt tolerance of plants for revegetation in arid areas.

对干旱地区植被恢复的渗透调节机制和提高植物抗旱性、耐盐性进行了研究。中国旱地不同植物叶片中积累的渗透调节物质(甜菜碱、糖类、糖醇和氨基酸)的种类和数量差异很大。为了提高植物的耐盐性，我们对幼苗进行了为期2天的胁迫驯化处理，在培养液中添加了聚乙二醇(PEG)。就实验结果而言，2天的胁迫驯化处理可以提高幼苗的耐盐性，使其适应致死浓度的氯化钠。

Studies on osmo-regulation mechanisms and improvement of drought and salt tolerance of plants were conducted for revegetation in arid areas. Types and amount of osmolytes (including Betains, Sugars, Sugar alcohols and Amino acids) accumulated in leaves were varied widely among plants growing in drylands of China. To enhance the salt tolerance of plants, we applied a stress acclimatization treatment to seedlings for 2 days by adding polyethylene glycol (PEG) to the culture solution. As for the results of experiments, 2-day stress acclimatization treatment could improve salt tolerance of seedlings enough to adapt them to a lethal concentration of NaCl.