6种杂交榛对新疆盐碱土的生理适应性研究  

Physiological Characteristics of Adaptability of Six Hybrid Hazelnuts to Saline-alkali Land in Xinjiang

作　　者：罗青红[1] 寇云玲[1,2] 史彦江[1] 宋锋惠[1,2] 韩强[1,2] 

机构地区：[1]新疆林业科学院造林治沙研究所,乌鲁木齐830063 [2]新疆农业大学林学与园艺学院,乌鲁木齐830053

出　　处：《西北植物学报》2013年第9期1867-1873,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：2012年自治区公益性科研院所科研业务经费资助项目;2011年中央财政林业科技推广示范资金项目

摘　　要：设置低、中、高3个盐碱梯度,研究6个平欧杂交榛品种（‘新榛1号’~‘新榛4号’、‘辽榛3号’、‘辽榛8号’,代码XZ1~XZ4、LZ3、LZ8）幼树的生理生化指标对新疆土壤盐碱胁迫的响应特征,并采用主成分分析和隶属函数法对其耐盐碱性进行综合评价。结果显示：（1）随着土壤盐碱从低度提高至高度,参试品种的电解质外渗率和丙二醛累积量均增加,且以品种XZ1和XZ3的叶片电解质外渗率增幅最大（HD-LD〉100%）,LZ8增幅最小（HD-LD≌4%）;叶片中丙二醛增幅最大的品种为XZ4（HD-LD=23.94%）,XZ2最小（HD-LD=7.06%）。（2）随着土壤盐碱度的提高,各品种叶绿素含量逐渐降低,且以品种XZ3的降幅最大（LD-HD=32.55%）;脯氨酸含量均呈先升高后降低的变化规律;可溶性糖、可溶性蛋白质含量以及抗氧化保护酶SOD和POD活性的变化趋势在品种间随盐碱度的加重差异较大。（3）品种LZ3和XZ1因在胁迫下具有较强的渗透调节能力和抗氧化保护酶活性,对盐碱土壤表现出较强的适应性;综合评价结果显示：各品种对盐碱土的适应能力从强至弱依次为LZ3〉XZ1〉LZ8〉XZ4〉XZ3〉XZ2。In this test,under low,moderate and high gradients of saline-alkali,we studied the response of physiological and biochemical indexes of six hybrid hazelnuts（Corylus heterophylla Fisch.×C.avellana L.）in the sapling stage to saline-alkali stress soil in Xinjiang,and made comprehensive appraisal by using the method of principal component analysis and membership function.The results showed that：（1）With the increase of the soil salinity gradient,the cell electrolyte leakage rate and the accumulation of malondialdehyde quantity of six hybrid hazelnuts all increased.Among them,the increase ranges of electrolyte leakage rate for XZ1 and XZ3 were the highest（HD minus LD100%）while the increase range of LZ8 was the lowest（HD minus LD only about 4%）;The increase range of the accumulation of malondialdehyde quantity for XZ4was the highest（HD minus LD is 23.94%）,while XZ2 was the lowest（HD minus LD is 7.06%）.（2）Chlorophyll content showed a decrease trend with the increase of the soil salinity radient.Among them,the decline range of XZ3 was the highest（LD minus HD is 32.55%）.Osmotic regulation substances,such as proline content were rising first and then reducing.The variation laws of soluble protein,soluble sugar contents and the activity of the SOD and POD among six cultivars were different.（3）Having stronger ability of osmotic adjustment and the activity of protective enzymes,LZ3 and XZ1 showed stronger adaptability to saline soil saline-alkali soil.A comprehensive analysis showed the adaptation of LZ3,XZ1,LZ8,XZ4,XZ3 and XZ2 to the saline-alkali soil orderly declined.

关 键 词：杂交榛 盐碱梯度 生理生化指标 综合评价 

分 类 号：Q945.79[生物学—植物学]